CN219144369U

CN219144369U - Energy storage system

Info

Publication number: CN219144369U
Application number: CN202320142212.8U
Authority: CN
Inventors: 马亚强
Original assignee: Xiamen Hithium Energy Storage Technology Co Ltd
Current assignee: Xiamen Hithium Energy Storage Technology Co Ltd
Priority date: 2023-01-20
Filing date: 2023-01-20
Publication date: 2023-06-06
Anticipated expiration: 2033-01-20

Abstract

The utility model discloses an energy storage system. The energy storage system includes: a cabinet body; the battery module is positioned in the cabinet body, and a first quick-inserting structure are arranged on the battery module; a thermal runaway protection device, the thermal runaway protection device comprising: the first locking device locks the battery module when the first locking device is in a locking state, and unlocks the battery module when the first locking device is in an unlocking state; the ejection device elastically supports against the battery module and; the second inserts the structure soon, and the second inserts the structure soon and is connected with first structure soon, and when the battery module took place thermal runaway, first locking device was in the unblock state, and ejection device is used for ejecting battery module out the cabinet body, and the second inserts the structure soon and first structure of inserting separation soon. The battery module with thermal runaway can be prevented from heating other battery modules by the energy storage system, the whole system is induced to generate thermal runaway, even fire explosion is caused, and the safety of the energy storage system is improved.

Description

Energy storage system

Technical Field

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

Background

In the related art, in order to ensure the operation safety of the energy storage system, a fire extinguishing device is arranged on the energy storage system, or a heat insulation device is arranged between the battery modules, so that the heat transfer between the battery modules is slowed down, and the heat diffusion between the battery modules is slowed down. However, current fire protection devices are passive protection devices and have slow response speed, and when the fire protection device is started, the energy storage system often starts to generate heat diffusion, and the effect of the fire protection device is very little. At this time, the SEI film of the battery core (when the lithium ion battery is charged and discharged for the first time, the electrode material reacts with the electrolyte on the solid-liquid phase interface to form a layer of solidified layer covered on the surface of the electrode material, solid electrolyte interface, SEI film for short) begins to melt, so that the anode material and the lithium-intercalated carbon contained in the anode material are exposed in the electrolyte, and the lithium-intercalated carbon reacts with the electrolyte to generate high temperature, so that the SEI film is further decomposed, and the thermal runaway is further aggravated. At this time, heat generated by the failed battery heats the adjacent battery, and causes thermal runaway of the adjacent battery, so that chain reaction is caused, thermal diffusion occurs, and the energy storage system generates fire explosion. The cooling effect of the heptafluoropropane system of the fire protection system can not prevent the heat from being diffused.

There are also heat insulating mats represented by aerogel between cells and between battery modules in the related art, but the heat insulating mats have high cost, and at the same time, as the battery expands when thermal runaway occurs, the heat insulating mats have heat insulating effect for reducing the density, often have very small density, the material of the heat insulating mats is easy to compress, and the expansion force generated by the thermal runaway of the battery can compress the heat insulating mats, so that the failed battery contacts with the physical property of the normal battery, and the thermal runaway of the normal battery is induced, thereby causing chain reaction.

Disclosure of Invention

The embodiment of the utility model provides an energy storage system.

An energy storage system according to an embodiment of the present utility model includes:

a cabinet body;

the battery module is positioned in the cabinet body, and a first quick-inserting structure are arranged on the battery module;

a thermal runaway protection device, the thermal runaway protection device comprising:

the first locking device is provided with a locking state and an unlocking state, the first locking device locks the battery module when the first locking device is in the locking state, and the first locking device unlocks the battery module when the first locking device is in the unlocking state;

the ejection device elastically supports against the battery module and;

the second quick-plug structure is connected with the first quick-plug structure, and the extraction force of the first quick-plug structure extracted from the second quick-plug structure is smaller than the ejection force of the ejection device on the battery module;

under the condition that the battery module is out of control, the first locking device is in an unlocking state, the ejection device is used for ejecting the battery module out of the cabinet body, and the second quick-inserting structure is separated from the first quick-inserting structure.

In the above-mentioned energy storage system, under the condition that thermal runaway takes place for the battery module, first locking device is in the unblock state, ejection device be used for with battery module bullet is launched the cabinet body, and the second inserts the structure soon and inserts the structure separation soon with first, and then can avoid taking place thermal runaway's battery module and heat other battery modules, arouse that whole system takes place thermal runaway, even fire explosion, promoted energy storage system's security.

In some embodiments, the second quick-connect structure includes a plug-in portion, the first quick-connect structure includes a connector and a plug-in device, the plug-in device is provided on the connector, the battery module includes a housing, the connector is mounted on an outer side surface of the housing, the plug-in portion is partially inserted into the plug-in device, and the plug-in device electrically connects the electrode of the battery module and the plug-in portion.

In this way, an electrical connection of the first and second snap structures may be achieved.

In some embodiments, the plugging portion is a strip connecting piece, the strip connecting piece extends along the height direction of the cabinet body, a plurality of battery modules are arranged in the cabinet body along the height direction of the cabinet body, two adjacent battery modules in the height direction of the cabinet body are connected through one strip connecting piece, the plugging device comprises two clamping pieces, and the two clamping pieces clamp the strip connecting piece

Thus, a plurality of battery modules can be electrically connected.

In some embodiments, a plurality of battery modules arranged along the height direction of the cabinet body form a battery column, and two second quick-insertion structures electrically connected with adjacent three battery modules in the height direction of the cabinet body are respectively located at two opposite sides of the battery column.

Thus, the connection of a plurality of battery modules is convenient.

In certain embodiments, the thermal runaway protection device further comprises:

the mounting plate is mounted in the cabinet body, and the first locking device, the ejection device and the second quick-inserting structure are arranged on the mounting plate.

In this way, installation and maintenance of the thermal runaway protection device is facilitated.

In certain embodiments, the ejection device comprises:

the base is arranged on the mounting plate;

a movable part elastically supporting the battery module, and;

the elastic piece is clamped between the base and the movable part, and is in a compression state when the first locking device is in a locking state; when the first locking device is in an unlocking state, the elastic piece stretches and ejects the battery module out of the cabinet body.

Therefore, the ejection device can elastically support the battery module.

In certain embodiments, the ejection device further comprises:

the guide part is arranged on one of the base and the movable part, and the elastic piece is sleeved on the guide part;

the sleeve is arranged on the other of the base and the movable part, and the elastic piece and the guide part are positioned in the sleeve.

Therefore, the ejection device can stably eject the battery module.

In certain embodiments, the cabinet is provided with a doorway, and the energy storage system further comprises:

the cabinet door is rotationally connected to the door opening;

the second locking device is provided with a locking state and an unlocking state, when the second locking device is in the locking state, the second locking device locks the cabinet door so that the cabinet door closes the door opening, and when the second locking device is in the unlocking state, the second locking device unlocks the cabinet door;

the door opening device is connected with the cabinet body and the cabinet door, the second locking device is in an unlocking state under the condition that the battery module is out of control, and the door opening device is used for opening the cabinet door under the condition that the second locking device unlocks the cabinet door, so that the ejection device ejects out of the battery module.

Therefore, the battery module can be ejected smoothly under the condition of the cabinet door.

In some embodiments, the battery module is provided with two first quick-insertion structures, each first quick-insertion structure is connected with one second quick-insertion structure, and the first locking device and the ejection device are located between the two second quick-insertion structures.

Therefore, the battery module can be ejected out of the cabinet body smoothly.

In some embodiments, the cabinet body is provided with a door opening, the cabinet body is internally provided with a mounting frame, the battery module is mounted on the mounting frame, and the mounting frame is inclined downwards towards the door opening direction.

Therefore, the battery module can slide out of the cabinet body more smoothly.

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

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are necessary for the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained from the structures shown in these drawings without the need for inventive effort to a person skilled in the art.

FIG. 1 is a perspective view of an energy storage system according to an embodiment of the present utility model;

FIG. 2 is a front view of an energy storage system according to an embodiment of the present utility model;

FIG. 3 is a cross-sectional view of the energy storage system of FIG. 2 along line A-A;

FIG. 4 is a cross-sectional view of the energy storage system of FIG. 2 along line B-B;

FIG. 5 is an enlarged view of portion C of the energy storage system of FIG. 4;

FIG. 6 is an enlarged view of portion D of the energy storage system of FIG. 4;

FIG. 7 is an enlarged view of portion E of the energy storage system of FIG. 4;

FIG. 8 is a perspective view of a thermal runaway protection device according to an embodiment of the present utility model;

FIG. 9 is a front view of a thermal runaway protection device according to an embodiment of the present utility model;

FIG. 10 is a top view of a thermal runaway protection device according to an embodiment of the utility model;

FIG. 11 is a cross-sectional view of the thermal runaway protection device of FIG. 9 along line F-F;

fig. 12 is a cross-sectional view of the thermal runaway protective device of fig. 9 along line G-G.

Reference numerals illustrate:

the energy storage system comprises an energy storage system-100, a cabinet body-12, a battery module-14, a thermal runaway protection device-16, a first quick-plug structure-18, a first locking device-20, an ejection device-22, a second quick-plug structure-24, a mounting rack-26, a support plate-28, a mounting seat-30, an electromagnetic part-32, a plug-in part-34, a connector-36, a plug-in device-38, an electrode 39, a shell-40, a mounting plate-42, a clamping piece-44, a connecting piece-46, a fixing part-48, a battery column-50, a base-52, a movable part-54, an elastic piece-56, a guide part-58, a sleeve-60, a groove-62, a door-64, a cabinet door-66, a second locking device-68, a door-opening device-70, a first electric connector-72 and a second electric connector-74.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present utility model and are not to be construed as limiting the present utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, 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 one or more features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present utility model, it should be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, as well as, for example, fixedly coupled, detachably coupled, or integrally coupled, unless otherwise specifically indicated and defined. Either mechanically or electrically. Can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The following disclosure provides many different embodiments, or examples, for implementing different features of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples, which are for the purpose of brevity and clarity, and which do not themselves indicate the relationship between the various embodiments and/or arrangements discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the application of other processes and/or the use of other materials.

Referring to fig. 1 to 8, an energy storage system 100 according to an embodiment of the present utility model includes a cabinet 12, a battery module 14, and a thermal runaway protection device 16. The battery module 14 is located in the cabinet 12, and the battery module 14 is provided with a first quick-insertion structure 18.

The thermal runaway prevention device 16 includes a first locking device 20, an ejection device 22, and a second quick-insertion structure 24, the first locking device 20 having a locked state and an unlocked state, the first locking device 20 locking the battery module 14 when the first locking device 20 is in the locked state, the first locking device 20 unlocking the battery module 14 when the first locking device 20 is in the unlocked state. The ejector 22 elastically abuts against the battery module 14. The second quick-inserting structure 24 is connected with the first quick-inserting structure 18, the extraction force of the first quick-inserting structure 18 extracted from the second quick-inserting structure 24 is smaller than the ejection force of the ejection device 22 on the battery module 14, and if the extraction force of the first quick-inserting structure 18 extracted from the second quick-inserting structure 24 is larger than the ejection force of the ejection device 22 on the battery module 14, the battery module 14 is always clamped in the cabinet 12 and cannot be ejected. In the event of thermal runaway of the battery module 14, the first locking device 20 is in an unlocked state, the ejection device 22 is used to eject the battery module 14 out of the cabinet 12, and the second quick-connect structure 24 is separated from the first quick-connect structure 18.

In the above energy storage system 100, under the condition that the battery module 14 is out of control thermally, the first locking device 20 is in an unlocked state, the ejection device 22 is used for ejecting the battery module 14 out of the cabinet 12, and the second quick-insertion structure 24 is separated from the first quick-insertion structure 18, so that the battery module 14 that is out of control thermally can be prevented from heating other battery modules 14, the whole system is induced to be out of control thermally, even fire and explosion are caused, and the safety of the energy storage system 100 is improved.

Specifically, the material of the cabinet 12 is not particularly limited in the present utility model. In one embodiment, the cabinet 12 may be made of stainless steel. The shape of the cabinet 12 is not particularly limited in the present utility model. In the embodiment of fig. 1, the cabinet 12 has a rectangular parallelepiped shape.

The cabinet body 12 is internally provided with the mounting frames 26, the mounting frames 26 are arranged along the height direction of the cabinet body 12, each mounting frame 26 comprises two supporting plates 28, the two supporting plates 28 are arranged along the horizontal direction, and the two supporting plates 28 respectively support the bottoms of the battery modules 14, so that a plurality of battery modules 14 can be installed in the cabinet body 12. The height direction may be the up-down direction as shown.

The battery module 14 is mounted in the cabinet 12, and the battery module 14 may be locked and fixed by the first locking device 20. In the embodiment shown in fig. 6, the first locking device 20 is an electromagnetic lock, which includes a mount 30 and an electromagnetic portion 32, the mount 30 being fixed in the cabinet 12, and the electromagnetic portion 32 being mounted on the mount 30. The electromagnetic lock has simple and compact structure and high control reliability. When the electromagnetic portion 32 is energized, the first locking device 20 is in a locked state, and the battery module 14 can be adsorbed and fixed. When the battery module 14 is out of control, the electromagnetic portion 32 can be powered off to enable the first locking device 20 to be in an unlocking state, the adsorption force of the electromagnetic portion 32 on the battery module 14 disappears, and then under the effect of the ejection force of the ejection device 22, the battery module 14 can be ejected out of the cabinet 12, so that the battery module 14 out of control is prevented from heating other battery modules 14, and the whole system is induced to be out of control, even to be in fire explosion. It will be appreciated that in other embodiments, the first locking device 20 may be other types of locking devices, for example, the first locking device 20 includes a buckle and a snap ring, the buckle is movable, the snap ring is fixed on the battery module 14, the buckle clamps the snap ring to lock the battery module 14, when the battery module 14 is out of control, the buckle is driven by the driving member to disengage from the snap ring to unlock the battery module 14, and the ejection device 22 may eject the battery module 14 out of the cabinet 12.

The ejector 22 elastically abuts against the battery module 14, when the first locking device 20 is in the locked state, the battery module 14 has a tendency to be ejected by the ejector 22, and when the first locking device 20 is in the unlocked state, the ejector 22 can eject the battery module 14 out of the cabinet 12.

The second quick-connect structure 24 is connected to the first quick-connect structure 18, so that the second quick-connect structure 24 and the first quick-connect structure 18 can be smoothly separated when the first locking device 20 is in the unlocked state. The extraction force of the first quick-connect structure 18 from the second quick-connect structure 24 is smaller than the ejection force of the ejection device 22 on the battery module 14, so that the battery module 14 can be ejected out of the cabinet 12 smoothly.

In one embodiment, the first snap-in structure 18 may be a male-end snap-in structure and the second snap-in structure 24 may be a female-end snap-in structure. In one embodiment, the second snap-in structure 24 may be a male-end snap-in structure and the first snap-in structure 18 may be a female-end snap-in structure.

The energy storage system 100 further includes a control device (not shown), which may collect parameters of the battery module 14, determine the temperature of the battery module 14 according to the parameters of the battery module 14, or detect the temperature of the battery module 14 through a temperature sensor. When the control device detects that a thermal runaway occurs in a certain battery module 14, the position of the battery module 14 is judged, then the first locking device 20 corresponding to the battery module 14 with the thermal runaway is controlled to be unlocked, and the ejection device 22 can eject the battery module 14 out of the cabinet 12. In one embodiment, the control device may include a BMS (Battery Management System, power management system).

In one embodiment, the control device includes a slave control unit, the slave control unit may be an important component of a Battery Management System (BMS), and plays a decisive role in safety application and life extension of the battery module during group use, the slave control unit accurately collects voltage and temperature of each single battery to realize real-time monitoring of battery states, the battery module has a reliable data communication function, a communication mode used in the BMS currently includes a daisy chain or a CAN, and in the running process of the control device, communication with a main control unit or other necessary devices of the Battery Management System (BMS) CAN be realized.

In one embodiment, the location of the battery module 14 may include a location of the battery cluster where the battery module 14 is located and a location on the battery cluster. For example, the energy storage system 100 includes a plurality of cabinets 12, one cabinet 12 with the battery modules 14 mounted thereon may form one battery cluster, and in the cabinet 12, a plurality of battery modules 14 may be arranged along the height direction of the cabinet 12, and the battery modules 14 and the battery clusters may be pre-numbered and stored. When the control device obtains that the temperature of a certain battery module 14 is greater than the set temperature, it determines that thermal runaway occurs in the battery module 14, and can determine the position of the battery module 14 through the source of the temperature signal. The position determination of the battery module 14 is a prior art and is not developed in detail herein.

The first and second snap-in

structures

18, 24 may be used for high-voltage and low-voltage connection of the battery module 14 to the cabinet 12.

In certain embodiments, the second quick-connect structure 24 includes a plug-in portion 34, the first quick-connect structure 18 includes a connector 36 and a plug-in device 38, the plug-in device 38 is disposed on the connector 36, the battery module 14 includes a housing 40, the connector 36 is mounted on an outer side of the housing 40, the plug-in portion 34 is partially inserted into the plug-in device 38, and the plug-in device 38 electrically connects the electrode 39 of the battery module 14 and the plug-in portion 34.

In this manner, electrical connection of the first and

second snap structures

18, 24 may be achieved.

Specifically, the plug portion 34 may be secured within the cabinet 12, and in one embodiment, the thermal runaway protection device 16 further includes a mounting plate 42, the mounting plate 42 may be secured to a back plate of the cabinet 12, and the mounting plate 42 may be an insulating plate. The plug portion 34 may be secured to the mounting plate 42.

The battery module 14 may include a plurality of unit cells (not shown), and the plurality of unit cells may be electrically connected in series, parallel or series-parallel, the battery module 14 has two electrodes 39, two first quick-plug structures 18 are disposed on a housing 40 of the battery module 14, and a plugging device 38 of each first quick-plug structure 18 is connected to the two electrodes 39 respectively, and in turn, the electrodes 39 may be electrically connected to the plugging portion 34 through the plugging device 38.

In the embodiment of fig. 5, the second quick connector structure 24 further includes a fixing portion 48, the connector portion 34 is connected to the fixing portion 48, and the fixing portion 48 is fixed on the mounting plate 42. The plug portion 34 and the fixing portion 48 may be connected as a unitary structure. In one example, the second snap structure 24 may be a copper bar.

In some embodiments, the plugging portion 34 is a long connecting piece, the long connecting piece extends along the height direction of the cabinet 12, a plurality of battery modules 14 are disposed in the cabinet 12 along the height direction of the cabinet 12, two adjacent battery modules 14 in the height direction of the cabinet 12 are electrically connected through a second quick-plugging structure 24, and the plugging device 38 includes two clamping pieces 44, where the two clamping pieces 44 clamp the long connecting piece.

In this way, a plurality of battery modules 14 can be electrically connected.

Specifically, in one embodiment, all of the battery modules 14 aligned in the height direction of the cabinet 12 are connected in series by the second quick-insertion structure 24. In the height direction, the plug-in portion 34 of one second plug-in structure 24 connects the two first plug-in structures 18 on the upper and lower adjacent two battery modules 14, so that the upper and lower adjacent two battery modules 14 are electrically connected.

However, the electrical connection of the plurality of battery modules 14 is not limited to serial connection, but may be parallel connection or series-parallel connection.

In one embodiment, the plug device 38 may comprise a reed plug device, which may comprise two clamping pieces 44 and a connecting piece 46, wherein the two clamping pieces 44 clamp the plug portion 34 (elongated connecting piece), the clamping effect is good, and one end of the clamping piece 44 extends out of the connector 36 and is turned outwards, so that the plug portion 34 is advantageously inserted between the two clamping pieces 44. The connection piece 46 is connected to the electrode 39 of the battery module 14, the insertion portion 34 is inserted into the connector 36 to be connected to the connection piece 46, and the insertion portion 34 is connected to the electrode 39 of the battery module 14.

In some embodiments, a plurality of battery modules 14 arranged along the height direction of the cabinet 12 form a battery column 50, and two second quick-plug structures 24 electrically connecting adjacent three battery modules 14 along the height direction of the cabinet 12 are respectively located at two opposite sides of the battery column 50.

In this way, the connection of the plurality of battery modules 14 is facilitated.

Specifically, referring to fig. 3, 8-12, the thermal runaway device 16 further includes a mounting plate 42, and the first locking device 20, the ejection device 22, and the second snap-in structure 24 are disposed on the mounting plate 42. The second snap-in structures 24 are respectively located on opposite sides of a battery string 50, left and right in fig. 9.

When the battery modules 14 are pushed into the cabinet 12 through the mounting frame 26, the first quick-insertion structure 18 is inserted into the insertion portion 34 of the second quick-insertion structure 24 fixed on the mounting plate 42, and when a plurality of battery modules 14 are mounted in this way, the mounting of the battery modules 14 is completed, and the electrical connection of the battery modules 14 is also completed. After the battery module 14 is mounted in place, the first locking device mounted on the mounting plate 42 is instructed by the control device, and the electromagnetic lock generates magnetic force to adsorb and fix the battery module 14.

In the embodiment shown in fig. 8, all of the battery modules 14 of one battery string 50 share one mounting plate 42, thus facilitating installation and maintenance of the thermal runaway protection device 16 and saving costs.

In certain embodiments, the thermal runaway protection device 16 further includes a mounting plate 42, the mounting plate 42 being mounted within the cabinet 12, and the first locking device 20, the ejection device 22, and the second quick-connect structure 24 being disposed on the mounting plate 42.

In this manner, installation and maintenance of the thermal runaway protection device 16 is facilitated.

Specifically, the mounting plate 42 may be an insulating plate, and the mounting plate 42 may be mounted and fixed on the back plate of the cabinet 12. The first locking device 20, the ejector 22 and the second quick-connect structure 24 may be mounted on the mounting plate 42 in advance, and then the mounting plate 42 is mounted in the cabinet 12, so that the mounting process of the first locking device 20, the ejector 22 and the second quick-connect structure 24 on the mounting plate 42 is more convenient due to the larger operation space outside the cabinet 12.

When the thermal runaway protection device 16 is maintained, the mounting plate 42 is detached from the cabinet 12, so that the first locking device 20, the ejection device 22 and the second quick-insertion structure 24 can be simultaneously detached from the cabinet 12 for maintenance, and the thermal runaway protection device 16 is convenient to maintain.

The mounting plate 42 may be removably positioned within the cabinet 12 by bolting, snap-fitting, or the like.

In some embodiments, the ejection device 22 includes a base 52, a movable portion 54, and a resilient member 56, the base 52 being provided on the mounting plate 42. The movable portion 54 elastically abuts against the battery module 14. The elastic member 56 is clamped between the base 52 and the movable portion 54, and the elastic member 56 is in a compressed state when the first locking device 20 is in a locked state; when the first locking device 20 is in the unlocked state, the elastic member 56 is extended and ejects the battery module 14 out of the cabinet 12.

In this way, the ejector 22 can elastically support the battery module 14.

Specifically, in one embodiment, the elastic member 56 may be a spring, and the battery module 14 compresses the spring through the movable portion 54 when the first locking device 20 is in the locked state, so that the spring stores elastic potential energy. When the first locking device 20 is in the unlocked state, the spring releases elastic potential energy to eject the battery module 14 out of the cabinet 12. It will be appreciated that in other embodiments, the resilient member 56 may also be other types of resilient members 56, and is not limited to springs.

In certain embodiments, the ejection device 22 further includes a guide 58 and a sleeve 60. The guiding part 58 is arranged on one of the base 52 and the movable part 54, and the elastic piece 56 is sleeved on the guiding part 58. A sleeve 60 is provided on the other of the base 52 and the movable portion 54, and the elastic member 56 and the guide portion 58 are located in the sleeve 60.

In this way, the ejector 22 can eject the battery module 14 stably.

Specifically, in the embodiment shown in fig. 7, the guiding portion 58 is fixed on the base 52, the sleeve 60 is fixed on the movable portion 54, when the first locking device 20 unlocks the battery module 14, the elastic member 56 ejects the battery module 14 out of the cabinet 12 through the movable portion 54, the guiding portion 58 guides the movement of the elastic member 56 from the inside of the elastic member 56, and the sleeve 60 guides the movement of the elastic member 56 from the outside of the elastic member 56, so that the elastic member 56 is more stable during the movement of ejecting the battery module 14, and radial deformation is reduced, so that the ejection device 22 can be ejected out of the battery module 14 stably.

In fig. 7, the movable portion 54 is further provided with a recess 62, and the recess 62 may receive a portion of the sleeve 60, a portion of the resilient member 56, and a portion of the guide portion 58.

In other embodiments, the guide 58 may be provided on the movable portion 54 and the sleeve 60 may be provided on the base 52.

In certain embodiments, referring to fig. 1, the cabinet 12 is provided with a door 64, and the energy storage system 100 further includes a cabinet door 66, a second locking device 68, and a door opening device 70, with the cabinet door 66 rotatably coupled to the door 64. The second locking device 68 has a locked state and an unlocked state, and when the second locking device 68 is in the locked state, the second locking device 68 locks the door 66 such that the door 66 closes the doorway 64. When the second locking means 68 is in the unlocked state, the second locking means 68 unlock the cabinet door 66. The door opening device 70 connects the cabinet body 12 and the cabinet door 66, and in case of thermal runaway of the battery module 14, the second locking device 68 is in an unlocked state, and the door opening device 70 is used for opening the cabinet door 66 in case that the second locking device 68 unlocks the cabinet door 66, so that the ejection device 22 ejects the battery module 14.

Thus, the battery module 14 can be ejected smoothly even with the cabinet door 66.

Specifically, the door opening device 70 may include an elastic member (not shown) that is in a compressed state and stores elastic potential energy when the second locking device 68 is in the locked state. When the second locking means 68 is in the unlocked state, the elastic member releases elastic potential energy, opening the cabinet door 66. In one embodiment, the door opener 70 has a similar structure to the ejector 22.

In fig. 1, the second locking means 68 are provided on the cabinet door 66. It will be appreciated that in other embodiments, the second locking device 68 may be provided on the cabinet 12.

In one embodiment, the door opening device 70 may include a hydraulic lever that is in a compressed state when the second locking device 68 locks the cabinet door 66. When the second locking device 68 unlocks the cabinet door 66, the hydraulic rod can pop out the cabinet door 66 to open the cabinet door 66.

In one embodiment, the door opening device 70 may include a torsion spring that is in a twisted state in one direction when the second locking device 68 locks the cabinet door 66. When the second locking means 68 unlocks the cabinet door 66, the torsion spring can be rotated in the opposite direction to open the cabinet door 66.

In one embodiment, the second locking device 68 may be an electromagnetic lock, and the second locking device 68 is similar in structure to the first locking device 20. It will be appreciated that in other embodiments, the second locking device 68 may be other types of locking devices, and is not limited to electromagnetic locks.

When the control device detects that a certain single battery is out of control, the battery module 14 is locked, the control device controls the cabinet door 66 to be opened, after the cabinet door 66 is flicked by the door opening device 70, the first locking device 20 is unlocked, the battery module 14 is flicked out of the cabinet body 12 under the action of the ejection device 22, and the other battery modules 14 and the whole system are prevented from generating fire explosion due to combustion explosion.

In some embodiments, two first snap-in structures 18 are provided on the battery module 14, each first snap-in structure 18 is connected to one second snap-in structure 24, and the first locking device 20 and the ejection device 22 are located between the two second snap-in structures 24, as shown in fig. 10.

Thus, the battery module 14 can be smoothly ejected out of the cabinet 12.

Specifically, since one battery module 14 is connected to two second quick-insertion structures 24 through two first quick-insertion structures 18, respectively, the first locking device 20 and the ejection device 22 are located between the two second quick-insertion structures 24, that is, the connection points of the battery module 14 and the two second quick-insertion structures 24 are distributed on two sides, and the acting force of the ejection device 22 ejecting the battery module 14 is in the middle.

When the first locking device 20 unlocks the battery module 14, the ejection device 22 ejects the battery module 14 from the middle position of the battery module 14, so that the two first quick-insertion structures 18 and the two second quick-insertion structures 24 are more easily separated, and the battery module 14 can be ejected out of the cabinet 12 smoothly.

In some embodiments, the housing 12 has a mounting bracket 26 therein, the battery module 14 is mounted on the mounting bracket 26, the housing 12 has a doorway 64, and the mounting bracket 26 is inclined downwardly toward the doorway 64.

Thus, the battery module 14 can slide out of the cabinet 12 more smoothly.

Specifically, since the mounting frame 26 is inclined downward toward the door 64, the force of the ejector 22 can provide a certain speed to the battery module 14 when the first locking device 20 unlocks the battery module 14, and since the mounting frame 26 has an angle inclined downward toward the door 64, the battery module 14 can slide out of the cabinet 12 more smoothly under the action of gravity, especially for the battery module 14 with a large weight, so that the battery module 14 can be separated from the cabinet 12 smoothly when a fire occurs.

In some embodiments, a plurality of battery modules 14 are disposed in the cabinet 12 along the height direction of the cabinet 12, the battery system formed by electrically connecting the plurality of battery modules 14 includes a first total electrode and a second total electrode, the energy storage system 100 includes a first electrical connector 72 and a second electrical connector 74, the first electrical connector 72 is connected to the first total electrode, the second electrical connector 74 is connected to the second total electrode, and the first electrical connector 72 and the second electrical connector 74 penetrate and protrude from the top plate of the cabinet 12. Specifically, the first electrical connector 72 and the second electrical connector 74 may connect to external devices including, but not limited to, electrical consumers, high voltage cabinets, power distribution cabinets, and the like.

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

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

Claims

1. An energy storage system, comprising:

a cabinet body;

the ejection device elastically supports against the battery module and;

2. The energy storage system of claim 1, wherein the second quick-connect structure comprises a plug-in portion, the first quick-connect structure comprises a connector and a plug-in device, the plug-in device is arranged on the connector, the battery module comprises a shell, the connector is arranged on the outer side surface of the shell, the plug-in portion is partially inserted into the plug-in device, and the plug-in device is electrically connected with the electrode of the battery module and the plug-in portion.

3. The energy storage system according to claim 2, wherein the plugging portion is a long connecting piece, the long connecting piece extends along the height direction of the cabinet body, a plurality of battery modules are arranged in the cabinet body along the height direction of the cabinet body, two adjacent battery modules in the height direction of the cabinet body are connected through one long connecting piece, and the plugging device comprises two clamping pieces, and the two clamping pieces clamp the long connecting piece.

4. The energy storage system of claim 3, wherein a plurality of said battery modules arranged in a height direction of said cabinet form a battery string, and two of said second snap-in structures electrically connecting adjacent three of said battery modules in the height direction of said cabinet are respectively located on opposite sides of said battery string.

5. The energy storage system of claim 1, wherein the thermal runaway protection device further comprises:

6. The energy storage system of claim 5, wherein said ejection device comprises:

the base is arranged on the mounting plate;

a movable part elastically supporting the battery module, and;

7. The energy storage system of claim 6, wherein said ejection device further comprises:

8. The energy storage system of any of claims 1-7, wherein the cabinet is provided with a doorway, the energy storage system further comprising:

the cabinet door is rotationally connected to the door opening;

9. The energy storage system of claim 1, wherein two of said first snap-in structures are provided on said battery module, each of said first snap-in structures being connected to one of said second snap-in structures, said first locking means and said ejection means being located between two of said second snap-in structures.

10. The energy storage system of claim 1, wherein the cabinet is provided with a doorway, a mounting bracket is provided in the cabinet, the battery module is mounted on the mounting bracket, and the mounting bracket is inclined downward toward the doorway.