CN116526632B

CN116526632B - Energy storage system

Info

Publication number: CN116526632B
Application number: CN202310739449.9A
Authority: CN
Inventors: 马亚强; 易梓琦
Original assignee: Shenzhen Haichen Energy Storage Technology Co ltd; Xiamen Hithium Energy Storage Technology Co Ltd
Current assignee: Shenzhen Haichen Energy Storage Technology Co ltd; Xiamen Hithium Energy Storage Technology Co Ltd
Priority date: 2023-06-21
Filing date: 2023-06-21
Publication date: 2024-01-23
Anticipated expiration: 2043-06-21
Also published as: CN116526632A

Abstract

The application relates to an energy storage system, which comprises a battery module, wherein the battery module comprises a battery module and a battery box body, the battery module is arranged in the battery box body, and one side of the battery box body is provided with an opening; and the electric module comprises an electric module, a liquid cooling module and a containing box body, wherein the electric module and the liquid cooling module are respectively arranged in the containing box body, the containing box body is provided with a sealing side wall, the containing box body is connected with the battery box body, the sealing side wall is used for sealing the opening, and the electric module and the liquid cooling module are respectively connected with the battery module. The purchasing cost and the sealing cost expenditure of the special cabinet body or the frame body are saved, the weight of the energy storage system is reduced, the battery box body is directly and tightly connected with the accommodating box body, the gap is reduced, the space utilization rate is improved, the energy density of the energy storage system can be improved, the requirements of various use scenes of users are met, and the customer experience feeling and satisfaction degree are improved.

Description

Energy storage system

Technical Field

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

Background

An energy storage system is a device or system that stores energy and releases the energy when needed. Because of the instability of renewable energy sources, such as solar energy, wind energy, etc., which results in large fluctuations in power generation under different weather conditions, energy storage technologies are needed to solve this problem. The principle of operation of an energy storage system is to convert energy into a different physical form for re-conversion to energy when required. Currently, the main energy storage technologies include battery energy storage, capacitor energy storage, compressed air energy storage and the like.

In a conventional battery energy storage system, a battery module is installed in a battery box to form a battery pack, then a plurality of battery packs are inserted into a battery cluster frame to form a battery cluster, and then the battery clusters are electrically connected, and finally the battery cluster is installed in a special cabinet or frame. However, the battery clusters are arranged in the cabinet body or the frame body and need to be sealed independently, the use amount of sealing materials is large, the sealing cost is high, the system weight is large, and the energy density of the battery energy storage system is limited; in addition, more gaps exist in the battery cluster structure, so that the space utilization rate is low, the energy density of a product is influenced, the use requirement of a user is difficult to meet, and the customer experience is influenced; in addition, each battery pack is required to be provided with a battery box body independently, the battery box body is required to be provided with a sealing upper cover independently to realize independent sealing, and the use amount of sealing elements is large, so that the sealing cost is increased.

Disclosure of Invention

Based on the above, it is necessary to provide an energy storage system aiming at the problems of complex structure, high sealing cost and influence on the energy density of the product.

The present application provides an energy storage system, comprising:

the battery module comprises a battery module and a battery box body, wherein the battery module is arranged in the battery box body, and an opening is formed in one side of the battery box body; the method comprises the steps of,

the electric module comprises an electric module body, a liquid cooling module body and a containing box body, wherein the electric module body and the liquid cooling module body are respectively arranged in the containing box body, a sealing side wall is arranged on the containing box body, the containing box body is connected with the battery box body, the sealing side wall is used for sealing the opening, and the electric module body and the liquid cooling module body are respectively connected with the battery module body.

The energy storage system of the scheme is formed by assembling the battery module and the electric module, specifically, the battery module is placed in the battery box during installation, the electric module and the liquid cooling module are respectively placed in the accommodating box, then one side of an opening of the battery box is directly aligned with one side of a sealing side wall of the accommodating box, finally the battery box is directly connected and fixed with the accommodating box, the electric module and the liquid cooling module are respectively connected with the battery module, and the sealing side wall just covers the opening at the moment, so that the whole energy storage system can be assembled. Compared with the related art, the battery box body and the accommodating box body can serve as a special cabinet body or a frame body, so that the battery module, the electric module and the liquid cooling module are loaded, namely, the purchasing cost and the sealing cost expenditure of the special cabinet body or the frame body are saved, the weight of the energy storage system is reduced, the battery box body is directly and tightly connected with the accommodating box body, the gap is reduced, the space utilization rate is improved, the energy density of the energy storage system can be improved, the requirements of various use scenes of users are met, and the experience and satisfaction of clients are improved; in addition, can directly seal the opening of battery box with the help of the sealed lateral wall that holds the box, save traditional battery package upper cover, reduce sealing member quantity of use, further reduce sealing cost and product weight, promote product energy density.

The technical scheme of the application is further described below:

in one embodiment, the energy storage system further comprises a sealing ring, wherein the sealing ring is arranged at the circumferential edge of the opening and is in sealing abutting joint with the sealing side wall; or,

the energy storage system further comprises a sealing ring, wherein the sealing ring is arranged on the sealing side wall, and the sealing ring is in sealing butt with the circumferential edge of the opening. The sealing ring can effectively fill the assembly gap between the battery box body and the accommodating box body, so that the assembly sealing performance is improved.

In one embodiment, the battery module comprises a plurality of battery cells and a liquid cooling plate, the liquid cooling plate is arranged in the battery box body, the battery cells are stacked in the battery box body and connected in series, and the battery cells are all arranged on the liquid cooling plate and matched with the liquid cooling plate in a heat transfer mode. The plurality of battery monomers share one liquid cooling plate for cooling, so that the number of the liquid cooling plates can be greatly reduced, and the battery module structure is simplified.

In one embodiment, the battery module further comprises a heat transfer support, the heat transfer support is arranged on the side face of the liquid cooling plate and is in heat transfer fit with the liquid cooling plate, the heat transfer support is provided with a plurality of placing bins, the battery cells are arranged in the placing bins in a one-to-one correspondence mode, and the side face with the largest surface area of the battery cells is in heat transfer fit with the side wall of the placing bin. The heat absorption capacity of the liquid cooling plate to the battery monomer in unit time is increased, and the cooling and heat dissipation efficiency of the liquid cooling plate to the battery monomer is enhanced.

In one embodiment, the battery module further comprises a first liquid cooling connecting piece, and one end of the first liquid cooling connecting piece is connected with the liquid cooling plate through a liquid cooling pipe;

the liquid cooling module comprises a second liquid cooling connecting piece and a liquid cooling unit, one end of the second liquid cooling connecting piece is connected with the liquid cooling unit, and the other end of the second liquid cooling connecting piece is connected with the other end of the first liquid cooling connecting piece. The liquid cooling plate in the battery box body can be communicated with the flow channel of the liquid cooling unit, so that the liquid cooling unit can supply cooling liquid to the liquid cooling plate, and heat generated by the operation of the battery unit can be absorbed and taken away in time.

In one embodiment, one of the first liquid cooling connector and the second liquid cooling connector is set as a first quick-change plug, and the other of the first liquid cooling connector and the second liquid cooling connector is set as a first quick-change socket, and the first quick-change plug is detachably connected with the first quick-change socket in a plugging manner;

the first liquid cooling connecting piece is provided with a water inlet and a water outlet, the second liquid cooling connecting piece is provided with a water supply port and a water return port, the water supply port is in butt joint with the water inlet, and the water return port is in butt joint with the water outlet. The quick-inserting structure formed by matching the first quick-changing plug and the first quick-changing socket can realize the quick and effective connection of the liquid cooling plate and the liquid cooling unit, and the connection operation of the traditional screw screwing is omitted.

In one embodiment, the water inlet and the water outlet are both provided with shut-off valves. When the first liquid cooling connecting piece is in a non-installation state, the stop valve is automatically closed, and the leakage of cooling liquid in the liquid cooling plate can be avoided.

In one embodiment, the battery module further includes a first series copper bar, a second series copper bar, and a first electrical connector, the plurality of battery cells are electrically connected to the first series copper bar and the second series copper bar, and the first series copper bar and the second series copper bar are electrically connected to one end of the first electrical connector;

the electric module comprises a second electric connecting piece and a high-voltage box, one end of the second electric connecting piece is electrically connected with the high-voltage box, and the other end of the second electric connecting piece is electrically connected with the other end of the first electric connecting piece. The first series copper bar and the second series copper bar can realize electric connection of a plurality of battery monomers and the first electric connecting piece, realize electric connection of the battery monomers and the high-voltage box, and control charge and discharge operations of the battery monomers through interaction between the high-voltage box and external equipment.

In one embodiment, one of the first electrical connector and the second electrical connector is set as a second quick-change plug, and the other of the first electrical connector and the second electrical connector is set as a second quick-change socket, and the second quick-change plug is detachably connected with the second quick-change socket in a plugging manner. The fast-inserting structure formed by the cooperation of the second fast-changing plug and the second fast-changing socket can realize the fast and effective connection of the battery monomer and the high-voltage box, and the connection operation of the traditional screw screwing is omitted.

In one embodiment, the battery case has the same size as the accommodating case; and/or the number of the groups of groups,

the battery box body comprises a top plate, a bottom plate, two first side plates and a second side plate, wherein the top plate and the bottom plate are oppositely arranged at intervals, the two first side plates are oppositely connected between the top plate and the bottom plate, the second side plate is connected between the top plate and the bottom plate and is connected with the two first side plates, the top plate, the bottom plate and the two first side plates enclose an opening, and the opening is positioned on the opposite side of the second side plate;

the width of the first side plate is smaller than that of the second side plate;

the height of the battery box body is greater than the length of the bottom edge. The battery box body has simple structure and composition.

In one embodiment, the energy storage system comprises two battery modules, the two battery modules being arranged on opposite sides of the electrical module;

the container body is provided with two sealing side walls, a first sealing side wall and a second sealing side wall are respectively arranged, the first sealing side wall and the second sealing side wall are arranged to be opposite two side walls of the container body, the first sealing side wall is in sealing connection with the opening of the battery module, which is correspondingly arranged, and the second sealing side wall is in sealing connection with the opening of the battery module, which is correspondingly arranged. The battery energy density of a single energy storage system is greatly increased, and the energy storage system is further provided with a working occasion suitable for larger electricity consumption requirements.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application, illustrate and explain the application and are not to be construed as limiting the application.

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

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

Fig. 2 is a schematic view of the structure of the battery module of fig. 1.

Fig. 3 is a partially enlarged structural view at a in fig. 2.

Fig. 4 is a schematic structural diagram of the electrical module in fig. 1.

Fig. 5 is a schematic side view of fig. 1.

Fig. 6 is a sectional view of the structure at B-B in fig. 5.

Fig. 7 is a partially enlarged structural view at C in fig. 6.

Fig. 8 is a partially enlarged structural view at D in fig. 6.

Reference numerals illustrate:

100. an energy storage system; 10. a battery module; 11. a battery module; 111. a battery cell; 112. a first liquid-cooled connector; 112a, a water inlet; 112b, a water outlet; 113. the first series copper bar; 114. the second series copper bar; 115. a first electrical connection; 12. a battery case; 121. an opening; 20. an electrical module; 21. an electrical module; 22. a housing case; 221. sealing the side wall; 23. a liquid cooling module; 231. a second liquid-cooled connector; 232. a liquid cooling unit; 24. a second electrical connection; 25. a high pressure box; 30. and (3) sealing rings.

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., these terms refer to the orientation or positional relationship based on the drawings, which are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In this application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, may be internal to the two elements or in an interaction relationship between the two elements, unless otherwise specifically defined. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

Referring to fig. 1, fig. 2, and fig. 4 to fig. 7, an energy storage system 100, specifically a battery energy storage system 100, according to an embodiment of the present application, may be applied in an energy supply scenario to provide continuous and stable electric energy for electric equipment.

In the present embodiment, the energy storage system 100 includes a battery module 10 and an electrical module 20. The battery module 10 includes a battery module 11 and a battery case 12, the battery module 11 is disposed in the battery case 12, and an opening 121 is disposed at one side of the battery case 12.

The electric module 20 includes electric module 21, liquid cooling module 23 and holds box 22, and electric module 21 and liquid cooling module 23 set up respectively in holding box 22, hold box 22 and be equipped with sealed lateral wall 221, hold box 22 and battery box 12 and be connected, sealed lateral wall 221 covers opening 121, and electric module 21 and liquid cooling module 23 are connected with battery module 11 respectively.

In this embodiment, the battery case 12 has the same size as the housing case 22. For example, the battery box 12 and the accommodating box 22 are both rectangular box structures, and have the same length, width and height, so that the battery box 12 and the accommodating box are assembled into a whole, have more regular shapes, are more convenient to install and store, and improve the space utilization rate.

Specifically, the battery case 12 includes a top plate, a bottom plate, two first side plates, and a second side plate, the top plate and the bottom plate are disposed opposite to each other at an interval, the two first side plates are connected between the top plate and the bottom plate, the second side plate is connected between the top plate and the bottom plate, and is connected with the two first side plates, the top plate, the bottom plate, and the two first side plates define an opening 121, and the opening 121 is located on an opposite side of the second side plate. Therefore, the battery box 12 has simple structure and composition, is easy to process and form, and reduces the processing cost. And the battery box body 12 with the structure is provided with only one opening 121, and when the battery box body is assembled, the electric module 20 and the battery module 10 can be assembled and sealed only by sealing the only opening 121 by the electric module 20, so that the packaging difficulty is reduced, and the sealing material and the cost are reduced.

In the use state, the battery case 12 is in a standing posture, that is, the top plate and the bottom plate are located in the up-down direction, the two first side plates and the second side plates are arranged in the vertical direction, and the opening 121 is located at one side of the battery case 12 in the horizontal direction.

The width of the first side plate is smaller than that of the second side plate; the height of the battery case 12 is greater than the length of the bottom edge. Such arrangement is advantageous in obtaining a more space-efficient and optimized internal chamber of the battery case 12, thereby placing the battery module 11 having a larger capacity and volume to enhance the energy density and cruising ability of the energy storage system 100.

It should be noted that, the connection and fixation manner of the battery case 12 and the housing case 22 may be any one or a combination of at least two of a screw connection, an adhesive connection, a magnetic connection, a snap connection, or the like, or may be a direct connection manner, or may be an assembly and fixation manner by an intermediate connection member or a connection structure, and may be selected as needed, and is not particularly limited herein.

In summary, implementing the technical scheme of the embodiment has the following beneficial effects: the energy storage system 100 of the above-mentioned scheme is assembled by two parts of the battery module 10 and the electric module 20, specifically, the battery module 11 is placed in the battery box 12 during installation, the electric module 21 and the liquid cooling module 23 are respectively placed in the accommodating box 22, then one side of the opening 121 of the battery box 12 is directly aligned with one side of the sealing side wall 221 of the accommodating box 22, finally the battery box 12 is directly connected and fixed with the accommodating box 22, the electric module 21 and the liquid cooling module 23 are respectively connected with the battery module 11, and at this time, the sealing side wall 221 just covers the opening 121, thereby completing the assembly operation of the whole energy storage system 100.

Compared with the related art, the battery box 12 and the accommodating box 22 in the application can serve as special cabinets or frames, so that the battery module 11, the electric module 21 and the liquid cooling module 23 are loaded, namely, the purchasing cost and the sealing cost expenditure of the special cabinets or frames are saved, the weight of the energy storage system 100 is reduced, the battery box 12 is directly and tightly connected with the accommodating box 22, the gap is reduced, and the space utilization rate is improved, so that the energy density of the energy storage system 100 can be improved, the requirements of various use situations of users are met, and the customer experience and satisfaction are improved; in addition, the opening 121 of the battery box 12 can be directly sealed by the sealing side wall 221 of the accommodating box 22, so that the traditional battery pack upper cover is omitted, the number of sealing elements is reduced, the sealing cost and the product weight are further reduced, and the product energy density is improved.

With continued reference to fig. 1, the energy storage system 100 includes two battery modules 10 according to the above embodiment, and the two battery modules 10 are respectively arranged on two opposite sides of the electrical module 20; the accommodating case 22 is provided with two sealing side walls 221, the two sealing side walls 221 are a first sealing side wall and a second sealing side wall, the first sealing side wall and the second sealing side wall are arranged as two opposite side walls of the accommodating case 22, the first sealing side wall is in sealing connection with the opening 121 of one battery module 10 correspondingly arranged, and the second sealing side wall is in sealing connection with the opening 121 of the other battery module 10 correspondingly arranged.

Thus, one electrical module 20 can be assembled with two battery modules 10, so that the battery energy density of a single energy storage system 100 is greatly increased, and the energy storage system 100 is provided with a working place suitable for larger electricity consumption requirements.

In order to eliminate the potential safety hazard caused by assembly gaps that still exist after the sealing sidewall 221 and the opening 121 are assembled due to manufacturing and assembly dimensional errors, in other embodiments, the energy storage system 100 further includes a sealing ring 30, where the sealing ring 30 is disposed at the circumferential edge of the opening 121, and the sealing ring 30 is in sealing abutment with the sealing sidewall 221; alternatively, the energy storage system 100 further includes a seal ring 30, where the seal ring 30 is disposed on the seal sidewall 221, and the seal ring 30 is in sealing abutment with the circumferential edge of the opening 121.

When the battery box body 12 is assembled and connected with the accommodating box body 22, the sealing ring 30 is extruded by the sealing side wall 221 and/or the outer wall of the battery box body 12 to deform, and the deformed sealing ring 30 can effectively fill the assembly gap between the battery box body 12 and the accommodating box body 22, so that the assembly sealing performance is improved.

Further, it is optional to simultaneously provide the sealing rings 30 at the circumferential edges of the sealing sidewall 221 and the opening 121, or to simultaneously provide at least two rings of sealing rings 30 nested inside and outside on the circumferential edges of the sealing sidewall 221 or the opening 121, so as to form at least two sealing structures after installation, and enhance the sealing capability.

Alternatively, the sealing ring 30 may be, but is not limited to, a rubber ring, a foam pad, or the like.

Further, in order to avoid loosening and dropping due to unstable installation of the seal ring 30, a groove may be optionally provided at the circumferential edge of the seal sidewall 221 or the opening 121, and the seal ring 30 may be embedded in the groove.

With continued reference to fig. 2 and 3, in addition, in some embodiments, the battery module 11 includes a plurality of battery cells 111 and a liquid cooling plate (not shown), the liquid cooling plate is disposed in the battery case 12, the plurality of battery cells 111 are stacked and connected in series in the battery case 12, and the plurality of battery cells 111 are all mounted on the liquid cooling plate and are in heat transfer fit with the liquid cooling plate. The plurality of battery cells 111 are connected in series, and the battery module 11 can concentrate and output the currents of the plurality of battery cells 111, so that the high-current use occasion is satisfied. The plurality of battery cells 111 share one liquid cooling plate for cooling, so that the number of the liquid cooling plates can be greatly reduced, the structure of the battery module 10 is simplified, and the manufacturing and later maintenance cost of the energy storage system 100 are reduced.

For example, when the battery cell 111 is a rectangular battery, the rectangular battery is generally placed directly on the surface of the liquid cooling plate or is adhered to the surface of the liquid cooling plate by heat conduction glue, and the rectangular battery achieves the purpose of self cooling by heat conduction between the bottom surface and the liquid cooling plate. However, the bottom surface of the rectangular battery is generally not the side surface with the largest surface area, so that the heat transfer amount per unit time is limited, and the cooling effect of the liquid cooling plate on the rectangular battery is limited.

In some embodiments, the battery module 11 further includes a heat transfer support, the heat transfer support is disposed on a side surface of the liquid cooling plate and is in heat transfer fit with the liquid cooling plate, the heat transfer support is provided with a plurality of placement bins, the battery cells 111 are disposed in the placement bins in a one-to-one correspondence manner, and a side surface with the largest surface area of the battery cells 111 is in heat transfer fit with a side wall of the placement bin.

In this way, besides the heat conduction between the bottom surface of the battery cell 111 and the liquid cooling plate, the side surface with the largest surface area of the battery cell 111 (i.e. the left side and the right side of the width direction of the battery cell 111) can also conduct heat with the side wall of the placement bin in a contact manner, and the heat is conducted to the liquid cooling plate through the heat transfer bracket, so that the effect that the heat of the battery cell 111 is synchronously conducted to the liquid cooling plate through the bottom surface and the side surface of the battery cell 111 is achieved, the heat absorption capacity of the liquid cooling plate to the battery cell 111 in unit time is greatly increased, and the cooling and heat dissipation efficiency of the liquid cooling plate to the battery cell 111 is enhanced.

With continued reference to fig. 3, fig. 4, fig. 6 and fig. 8, in addition, in any of the foregoing embodiments, the battery module 11 further includes a first liquid-cooled connecting member 112, where one end of the first liquid-cooled connecting member 112 is connected to the liquid-cooled plate through a liquid-cooled tube; the liquid cooling module 23 includes a second liquid cooling connector 231 and a liquid cooling unit 232, one end of the second liquid cooling connector 231 is connected to the liquid cooling unit 232, and the other end of the second liquid cooling connector 231 is connected to the other end of the first liquid cooling connector 112. The first liquid cooling connecting piece 112 is connected with the second liquid cooling connecting piece 231, so that the liquid cooling plate in the battery box body 12 is communicated with the flow channel of the liquid cooling unit 232, and the liquid cooling unit 232 can supply cooling liquid to the liquid cooling plate, so that the cooling liquid dynamically flows in the liquid cooling plate, and heat generated by the operation of the battery unit 111 is absorbed and taken away in time.

Specifically, in the above embodiment, one of the first liquid-cooled connector 112 and the second liquid-cooled connector 231 is set as the first quick-change plug, and the other of the first liquid-cooled connector 112 and the second liquid-cooled connector 231 is set as the first quick-change socket, and the first quick-change plug is detachably connected with the first quick-change socket in a plugging manner; the first liquid cooling connector 112 is provided with a water inlet 112a and a water outlet 112b, the second liquid cooling connector 231 is provided with a water supply port and a water return port, the water supply port is in butt joint with the water inlet 112a, and the water return port is in butt joint with the water outlet 112 b. Adopt the quick-change plug to cooperate the quick-change structure that forms with first quick-change socket can realize liquid cooling board and liquid cooling unit 232 quick effective connection, saved the connection operation of traditional screw, whole mechanism is convenient for install and remove, installation simple operation is laborsaving.

In addition, the plurality of battery cells 111 share one liquid cooling plate, and the liquid cooling plate is connected with the first liquid cooling connecting piece 112, so that the plurality of battery cells 111 share one group of water inlets 112a and water outlets 112b, the consumption of liquid cooling components is greatly reduced, the structure of the energy storage system 100 is simplified, and the manufacturing cost is reduced.

Further, both the water inlet 112a and the water outlet 112b are provided with shut-off valves. When the first liquid cooling connector 112 is in the non-installation state (i.e., the first liquid cooling connector 112 is not connected to the second liquid cooling connector 231), the stop valve is automatically closed, so that leakage of the cooling liquid in the liquid cooling plate can be avoided.

In still other embodiments, the battery module 11 further includes a first series copper bar 113, a second series copper bar 114, and a first electrical connector 115, the plurality of battery cells 111 are electrically connected to the first series copper bar 113 and the second series copper bar 114, and the first series copper bar 113 and the second series copper bar 114 are electrically connected to one end of the first electrical connector 115; the electrical module 21 includes a second electrical connector 24 and a high voltage box 25, one end of the second electrical connector 24 is electrically connected to the high voltage box 25, and the other end of the second electrical connector 24 is electrically connected to the other end of the first electrical connector 115.

So set up, first series copper bar 113 and second series copper bar 114 can realize the electricity with a plurality of battery cell 111 and first electrical connection piece 115 and then be connected with second electrical connection piece 24 through first electrical connection piece 115, realize that battery cell 111 is connected with high voltage box 25 electricity, link to each other with external equipment through high voltage box 25 and alternate, control the charge-discharge operation to battery cell 111.

Specifically, in the above embodiment, one of the first electrical connector 115 and the second electrical connector 24 is configured as a second quick-change plug, and the other of the first electrical connector 115 and the second electrical connector 24 is configured as a second quick-change socket, and the second quick-change plug is detachably connected to the second quick-change socket. The quick-inserting structure formed by matching the second quick-changing plug and the second quick-changing socket can realize the quick and effective connection of the battery unit 111 and the high-voltage box 25, so that the connection operation of the traditional screw screwing is omitted, and the whole mechanism is convenient to assemble and disassemble and convenient and labor-saving in installation operation.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims

1. An energy storage system (100), comprising:

the battery module (10), the battery module (10) comprises a battery module (11) and a battery box body (12), the battery module (11) is arranged in the battery box body (12), and an opening (121) is formed in one side of the battery box body (12); the method comprises the steps of,

the electric module (20), electric module (20) include electric module (21), liquid cooling module (23) and hold box (22), electric module (21) with liquid cooling module (23) set up respectively in hold box (22), hold box (22) be equipped with sealed lateral wall (221), hold box (22) with battery box (12) are connected, sealed lateral wall (221) will opening (121) closing cap, electric module (21) with liquid cooling module (23) are connected with battery module (11) respectively;

the energy storage system (100) comprises two battery modules (10), wherein the two battery modules (10) are arranged on two opposite sides of the electric module (20); the container body (22) is provided with two sealing side walls (221), a first sealing side wall and a second sealing side wall are respectively arranged, the first sealing side wall and the second sealing side wall are arranged to be opposite to the two side walls of the container body (22), the first sealing side wall is in sealing connection with the opening (121) of the battery module (10) corresponding to one of the first sealing side walls, and the second sealing side wall is in sealing connection with the opening (121) of the battery module (10) corresponding to the other of the second sealing side walls.

2. The energy storage system (100) according to claim 1, wherein the energy storage system (100) further comprises a sealing ring (30), the sealing ring (30) being arranged at a circumferential edge of the opening (121), and the sealing ring (30) being in sealing abutment with the sealing sidewall (221); or,

the energy storage system (100) further comprises a sealing ring (30), wherein the sealing ring (30) is arranged on the sealing side wall (221), and the sealing ring (30) is in sealing butt with the circumferential edge of the opening (121).

3. The energy storage system (100) of claim 1, wherein the battery module (11) comprises a plurality of battery cells (111) and a liquid cooling plate, the liquid cooling plate is arranged in the battery box (12), the plurality of battery cells (111) are stacked in the battery box (12) and connected in series, and the plurality of battery cells (111) are all arranged on the liquid cooling plate and are in heat transfer fit with the liquid cooling plate.

4. The energy storage system (100) of claim 3, wherein the battery module (11) further comprises a heat transfer bracket, the heat transfer bracket is arranged on a side surface of the liquid cooling plate and is in heat transfer fit with the liquid cooling plate, the heat transfer bracket is provided with a plurality of placement bins, the battery cells (111) are arranged in the placement bins in a one-to-one correspondence manner, and a side surface with the largest surface area of the battery cells (111) is in heat transfer fit with a side wall of the placement bin.

5. The energy storage system (100) of claim 3, wherein the battery module (11) further comprises a first liquid-cooled connector (112), one end of the first liquid-cooled connector (112) being connected to the liquid-cooled plate through a liquid-cooled tube;

the liquid cooling module (23) comprises a second liquid cooling connecting piece (231) and a liquid cooling unit (232), one end of the second liquid cooling connecting piece (231) is connected with the liquid cooling unit (232), and the other end of the second liquid cooling connecting piece (231) is connected with the other end of the first liquid cooling connecting piece (112).

6. The energy storage system (100) of claim 5, wherein one of the first liquid-cooled connector (112) and the second liquid-cooled connector (231) is configured as a first quick-change plug, and the other of the first liquid-cooled connector (112) and the second liquid-cooled connector (231) is configured as a first quick-change socket, the first quick-change plug being in separable plug-in communication with the first quick-change socket;

the first liquid cooling connecting piece (112) is provided with a water inlet (112 a) and a water outlet (112 b), the second liquid cooling connecting piece (231) is provided with a water supply port and a water return port, the water supply port is in butt joint with the water inlet (112 a), and the water return port is in butt joint with the water outlet (112 b).

7. The energy storage system (100) of claim 6, wherein the water inlet (112 a) and the water outlet (112 b) are each provided with a shut-off valve.

8. The energy storage system (100) of claim 3, wherein the battery module (11) further comprises a first series copper bar (113), a second series copper bar (114), and a first electrical connection (115), wherein a plurality of the battery cells (111) are electrically connected to the first series copper bar (113) and the second series copper bar (114), and wherein the first series copper bar (113) and the second series copper bar (114) are electrically connected to one end of the first electrical connection (115);

the electric module (21) comprises a second electric connecting piece (24) and a high-voltage box (25), one end of the second electric connecting piece (24) is electrically connected with the high-voltage box (25), and the other end of the second electric connecting piece (24) is electrically connected with the other end of the first electric connecting piece (115).

9. The energy storage system (100) of claim 8, wherein one of the first electrical connector (115) and the second electrical connector (24) is configured as a second quick-change plug, and the other of the first electrical connector (115) and the second electrical connector (24) is configured as a second quick-change socket, the second quick-change plug being detachably plugged into the second quick-change socket.

10. The energy storage system (100) of claim 1, wherein the battery housing (12) is the same size as the containment housing (22); and/or the number of the groups of groups,

the battery box body (12) comprises a top plate, a bottom plate, two first side plates and a second side plate, wherein the top plate and the bottom plate are oppositely arranged at intervals, the two first side plates are oppositely connected between the top plate and the bottom plate, the second side plate is connected between the top plate and the bottom plate and is connected with the two first side plates, the top plate, the bottom plate and the two first side plates enclose an opening (121), and the opening (121) is positioned on the opposite side of the second side plate;

the height of the battery box body (12) is larger than the length of the bottom edge.