CN116830360A

CN116830360A - energy storage device

Info

Publication number: CN116830360A
Application number: CN202280011929.7A
Authority: CN
Inventors: 王学辉; 金秋; 陈小波
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2021-11-26
Filing date: 2022-09-20
Publication date: 2023-09-29
Also published as: WO2023093233A1; CN216488248U

Abstract

The application provides an energy storage device, comprising: the heat exchange mechanism is internally provided with a channel for heat exchange liquid to flow; a plurality of battery cells adjacent to the heat exchange mechanism, the heat exchange liquid for flowing through the heat exchange mechanism to regulate the temperature of the battery cells; and the fire-fighting mechanism is connected with the heat exchange mechanism and is in fluid communication with the heat exchange mechanism, and the fire-fighting mechanism is used for spraying the heat exchange liquid towards the battery cell when the battery cell is in thermal runaway. Through being linked together fire control mechanism and heat transfer mechanism, make fire control mechanism can directly utilize heat transfer liquid of heat transfer mechanism to carry out fire control operation, not only ensured the fire control ability in the energy memory, improved energy memory's security, still effectually integrated fire control mechanism and heat transfer mechanism in the current energy memory, reduced because the pipeline is complicated in the energy memory that the fire control mechanism leads to alone, and the problem that available space descends in the energy memory.

Description

Energy storage device

Cross Reference to Related Applications

The present application claims priority from chinese patent application 202122932634.9 entitled "energy storage device" filed on day 2021, 11 and 26, the entire contents of which are incorporated herein by reference.

Technical Field

The application belongs to the technical field of energy storage equipment, and particularly relates to an energy storage device.

Background

As environmental destruction and resource consumption are becoming serious problems, interest in systems that can store energy and effectively utilize the stored energy has grown. As such, there is an increasing interest in new renewable energies that cause little or no pollution (e.g., cause little pollution) during power generation. The energy storage means may be a system utilizing new renewable energy, a battery system and an existing power system in combination with each other.

In the development of energy storage devices, safety issues are also a non-negligible issue. Therefore, how to enhance the safety of the energy storage device is a technical problem to be solved in battery technology.

Content of the application

The embodiment of the application provides an energy storage device, which can improve the safety, optimize the internal architecture of the existing energy storage device and reduce the laying of fire-fighting pipelines in the energy storage device.

According to an embodiment of the present application, there is provided an energy storage device including:

the heat exchange mechanism is internally provided with a channel for heat exchange liquid to flow;

a battery pack comprising a plurality of battery cells adjacent to the heat exchange mechanism, the heat exchange liquid for flowing through the heat exchange mechanism to regulate the temperature of the battery pack;

and the fire-fighting mechanism is connected with the heat exchange mechanism and is in fluid communication with the heat exchange mechanism, and is used for spraying the heat exchange liquid towards the battery pack when the battery pack is out of control.

By adopting the structure, the fire-fighting mechanism and the heat exchange mechanism are communicated, so that the fire-fighting mechanism can directly utilize the heat exchange liquid of the heat exchange mechanism to perform fire-fighting operation, the fire-fighting capacity in the energy storage device is guaranteed, the safety of the energy storage device is improved, the fire-fighting mechanism and the heat exchange mechanism in the existing energy storage device are effectively integrated, and the problems of complex pipelines and reduced available space in the energy storage device caused by the independent arrangement of the fire-fighting mechanism are solved.

Optionally, the energy storage device further comprises a pressurizing piece, the heat exchange liquid enters the channel after passing through the pressurizing piece, and the pressurizing piece is used for increasing the pressure of the heat exchange liquid.

By adopting the structure, the pressure of the heat exchange liquid can be increased, and the initial kinetic energy of the liquid sprayed by the spray head is ensured so as to cover the whole battery pack.

Optionally, the fire-fighting mechanism comprises a spray head and a blocking part, wherein the spray head is provided with an opening, and the blocking part covers the opening; the closure is configured to actuate to open the opening when the ambient temperature reaches a threshold.

Further, the plugging part is made of temperature-sensitive materials.

By adopting the structure, the special control component for the configuration of the nozzle can be reduced, and when the fire-fighting operation needs to be sprayed, the plugging part filled in the opening of the nozzle can be automatically melted, so that the opening of the nozzle is opened, and the fire-fighting operation is sprayed.

Further, the fire-fighting mechanism further comprises an electric heating element connected with the plugging portion, and the electric heating element is used for heating the plugging portion.

By adopting the structure, the opening of the spray head can be opened when the fire-fighting pipeline is required to actively spray fire-fighting operation.

Optionally, the energy storage device further comprises a box body, and the heat exchange mechanism, the fire protection mechanism and the plurality of battery packs are all accommodated in the box body.

By adopting the structure, the fire-fighting mechanism and the heat exchange mechanism can share heat exchange liquid, so that the pipeline structure in the energy storage device is reduced, the occupied space in the energy storage device is optimized, and the energy storage device can store a large number of energy storage devices conveniently.

Optionally, the energy storage device further comprises a sensor and a control unit, the sensor and the electric heating element are electrically connected with the control unit, the sensor is used for detecting the state of the battery cell and generating a thermal runaway alarm signal, and the control unit controls the electric heating element according to the thermal runaway alarm signal.

By adopting the structure, the automatic control of the plugging part can be realized, the occurrence of thermal runaway of the battery pack can be accurately judged by detecting the state of the battery cell and generating a thermal runaway alarm signal, and the electric heating part is controlled to work, the plugging part is melted after the temperature of the electric heating part is increased, so that the fire-fighting mechanism works to perform fire-fighting operation.

Further, the heat exchange mechanism further comprises a liquid inlet and a liquid outlet which are communicated with the channel, and the energy storage device further comprises a liquid supply pipeline communicated with the liquid inlet and a liquid outlet pipeline communicated with the liquid outlet;

at least one of the liquid supply pipeline and the liquid outlet pipeline is provided with the fire-fighting mechanism, and at least one of the liquid supply pipeline and the liquid outlet pipeline is provided with the pressurizing piece.

By adopting the structure, unified conveying of heat exchange liquid in each heat exchange component in the energy storage device can be facilitated, pipeline structures in the energy storage device are reduced, and through the arrangement of the pressurizing piece, liquid injection can be controlled through the self pressure of the heat exchange mechanism, and the pressure of injection can be improved through the control of the pressurizing piece, so that the angle and the distance of injection and the water mist effect of the injection are improved.

Optionally, the fire-fighting mechanism further comprises a fire-fighting pipe, one end of the fire-fighting pipe is communicated with the channel, and the spray head is sleeved at the other end of the fire-fighting pipe.

Optionally, the heat exchange mechanism further comprises a storage tank, and the storage tank is sunk downwards along the first direction and is used for storing the battery pack.

By adopting the structure, the energy storage devices such as the battery pack can be stably placed in the storage tank.

Further, one end of the fire tube is connected to any inner side wall of the storage tank, and extends opposite to the storage tank, and the nozzle end on the fire tube is provided with a top bending part, so that the spraying direction of the nozzle faces the battery pack.

By adopting the structure, the access point of the fire tube is arranged on the inner wall of the storage tank and extends back to back with the storage tank, so that the fire tube is completely arranged inside the energy storage device, the projections on the periphery of the energy storage device are reduced, the internal framework of the energy storage device is optimized, and secondly, the extending direction of the other end of the fire tube can be adjusted through the arrangement of bending the top, so that the extending direction of the other end of the fire tube deviates from the first direction, and the spraying area can be fully filled with the fire-fighting area when the spray head sprays conveniently.

Further, a bottom bending part is further arranged at one end of the fire tube connected with the heat exchange mechanism, and the bottom bending part enables the fire tube to extend in a plane parallel to the bottom wall of the storage tank for a certain distance before extending back to the storage tank.

By adopting the structure, through the arrangement of bottom bending, the end part position of the fire tube communicated with the heat exchange mechanism does not extend in the first direction, so that heat exchange liquid in the channel can conveniently enter the fire tube.

Optionally, a mounting frame is further arranged on the periphery of the heat exchange mechanism, and the mounting frame is used for fixing the heat exchange mechanism with a mounting position.

Further, the mounting frame is provided with a mounting hole for bolting or screwing.

By adopting the structure, the heat exchange mechanism can be stably fixed with the installation position.

Optionally, the liquid inlet and the liquid outlet are arranged on the outer side wall of the heat exchange mechanism at intervals, and the liquid inlet and the liquid outlet are arranged below the mounting frame.

By adopting the structure, the liquid inlet and the liquid outlet are convenient to connect with the external pipeline, protrusions on the periphery of the energy storage device can be reduced, the liquid inlet and the liquid outlet can be under the protection of the mounting frame, and the mechanical strength of the energy storage device is improved.

Compared with the prior art, in the energy storage device, the fire-fighting mechanism and the heat exchange mechanism are communicated, so that the fire-fighting mechanism can directly utilize the heat exchange liquid of the heat exchange mechanism to carry out fire-fighting operation, the fire-fighting capability in the energy storage device is guaranteed, the fire-fighting mechanism and the heat exchange mechanism in the existing energy storage device are effectively integrated, and the problems of complex pipelines and reduced available space in the energy storage device caused by the independent arrangement of the fire-fighting mechanism are solved.

Drawings

Features, advantages, and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of an embodiment of the present application.

Fig. 2 is a schematic view illustrating a structure of a battery pack according to still another embodiment of the present application after the battery pack is removed.

FIG. 3 is a schematic diagram of an embodiment of a showerhead according to the present application.

Fig. 4 is a schematic structural view of another embodiment of the spray head according to the present application.

Fig. 5 is a schematic view of another embodiment of a spray head according to the present application.

Fig. 6 is a schematic view illustrating a structure of a battery pack according to another embodiment of the present application after the battery pack is removed.

Fig. 7 is a partial schematic view of the embodiment shown in fig. 2.

Fig. 8 is a schematic view of a fire-fighting mechanism according to an embodiment of the present application.

Fig. 9 is a schematic view of the embodiment of fig. 1 with the battery pack removed.

Fig. 10 is a block diagram of the embodiment shown in fig. 1.

In the accompanying drawings:

11. a liquid inlet; 12. a liquid outlet; 13. a storage tank; 14. a mounting frame; 15. a mounting hole; 21. a fire tube; 22. a spray head; 23. bending the top; 24. bending the bottom; 25. a blocking part; 26. an electric heating element; 27. a fixing frame; 100. a heat exchange mechanism; 111. a liquid supply pipeline; 112. a liquid outlet pipeline; 121. a liquid supply branch; 122. a liquid outlet branch; 200. a battery pack; 201. a battery cell; 300. a fire-fighting mechanism; 400. a control unit; 500. a sensor.

In the drawings, the drawings are not necessarily to scale.

Detailed Description

Embodiments of the present application are described in further detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the application and are not intended to limit the scope of the application, i.e., the application is not limited to the embodiments described.

In the description of the present application, it is to be noted that, unless otherwise indicated, the meaning of "plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like are merely used for convenience in describing the present application and to simplify the description, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The "vertical" is not strictly vertical but is within the allowable error range. "parallel" is not strictly parallel but is within the tolerance of the error.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the described embodiments of the application may be combined with other embodiments.

The directional terms appearing in the following description are those directions shown in the drawings and do not limit the specific structure of the application. In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present application can be understood as appropriate by those of ordinary skill in the art.

At present, the application of the power battery is wider from the market development prospect and application trend. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and the like, and a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the application field of the power battery, the market demand of the power battery is also continuously expanding.

Because of the characteristics of the battery, potential safety hazards, such as spontaneous combustion of the battery, are easy to occur during centralized storage, so that a special energy storage device is mostly adopted in the current field to realize centralized storage and utilization of the battery monomers. When the special energy storage device is used, the fire extinguishing agent needs to be independently designed for the energy storage device, the fire extinguishing agent is introduced into the battery monomer through the pipeline, the fire extinguishing agent needs to be stored in an independent space, the pipeline also needs to be independently paved, and the construction is complex and the cost is high in actual use.

The inventor of the present application has noticed that, in order to solve the foregoing problems, in the art, attempts are made to directly mount a fire-fighting mechanism in a peripheral side supporting structure of an energy storage device, but a large number of battery cells are often stored in an actual energy storage device, the fire-fighting mechanism is disposed on the peripheral side, and when a fire occurs, a fire-fighting medium cannot be sprayed deep inside the energy storage device, so that the purpose of lowering the temperature of a battery pack cannot be achieved, and there is a risk of afterburning.

In order to relieve the fire-fighting defect in the existing energy storage device, the applicant researches and discovers that the heat exchange mechanism and the fire-fighting mechanism in the energy storage device can be integrated, so that the heat exchange liquid circulated in the heat exchange mechanism for a long time can be used by the fire-fighting mechanism when a fire occurs, the pipeline structure in the energy storage device can be obviously reduced, the design difficulty and the erection cost are reduced, and the energy storage device has general applicability.

Based on the above considerations, the present inventors have conducted intensive studies to design an energy storage device in order to solve the safety problem in the existing energy storage device.

In the present application, the energy storage means may be a system using new renewable energy, a battery system, and an existing electric power system in combination with each other.

In the present application, the battery cells may include a lithium ion secondary battery cell, a lithium ion primary battery cell, a lithium sulfur battery cell, a sodium lithium ion battery cell, a sodium ion battery cell, or a magnesium ion battery cell, which is not limited in the embodiment of the present application. The battery cell may be in a cylindrical shape, a flat shape, a rectangular parallelepiped shape, or other shapes, which is not limited in this embodiment of the application.

Referring to fig. 1 and 2, the first direction is referred to as an x-axis direction in the embodiment of the present application.

In some embodiments of the present application, as shown in fig. 1 and 2, fig. 1 is a schematic structural diagram of an embodiment of the present application, and fig. 2 is a schematic structural diagram of another embodiment of the present application after removing a battery pack. There is provided an energy storage device comprising: heat exchange mechanism 100, battery pack 200, and fire protection mechanism 300. The heat exchange mechanism 100 is provided with a passage through which the heat exchange liquid flows. The battery pack 200, including a plurality of battery cells 201, is adjacent to the heat exchange mechanism 100, and a heat exchange liquid is used to flow through the heat exchange mechanism 100 to regulate the temperature of the battery pack 200. Fire-fighting mechanism 300 is connected to heat-exchanging mechanism 100 and is in fluid communication with heat-exchanging mechanism 100, fire-fighting mechanism 300 being configured to spray heat-exchanging liquid toward battery pack 200 upon thermal runaway of battery pack 200.

The heat exchange mechanism 100 may be a heat exchange plate, in which a tortuous and extending channel is formed, and the battery pack 200 is placed on any outer wall surface thereof, so that the battery pack 200 placed on the surface of the heat exchange mechanism 100 exchanges heat through heat conduction. Specifically, the heat exchange mechanism 100 is used to cool the battery pack 200. Specifically, fire mechanism 300 is in communication with a passageway within heat exchange mechanism 100, and a heat exchange fluid is able to enter fire mechanism 300. The heat exchange liquid may be, without limitation, water.

Through being linked together fire control mechanism 300 and heat exchange mechanism 100, make fire control mechanism 300 can directly utilize the heat transfer liquid of heat exchange mechanism 100 to carry out fire control operation, not only ensured the fire control ability in the energy memory, improved energy memory's security, still effectually integrated fire control mechanism 300 and heat exchange mechanism 100 among the current energy memory, reduced because the pipeline is complicated in the energy memory that sets up fire control mechanism 300 alone and the available space decline's in the energy memory problem.

In some embodiments of the present application, optionally, the energy storage device further includes a pressurizing member, and the heat exchange liquid passes through the pressurizing member and then enters the channel, and the pressurizing member is used for increasing the pressure of the heat exchange liquid.

Wherein, the pressurizing piece can be arranged at the heat exchange liquid source, namely the cooling water source. The plenum may be disposed, without limitation, on any of the lines between the energy storage device and the source of heat exchange liquid. Without limitation, the pressurizing member is provided with at least one. Without limitation, the pressurizing member may employ a drive pump, a compressor, or the like.

By adopting the structure, the pressure of the heat exchange liquid can be increased, the initial kinetic energy of the liquid sprayed out of the spray head is ensured so as to cover the whole battery pack, and the pipeline structure between the energy storage device and the heat exchange liquid source is in circulating communication, so that the whole pressurization to the internal environment can be realized by arranging the heat exchange liquid source on any pipeline.

In some embodiments of the present application, optionally, as shown in fig. 3, fig. 3 is a schematic structural diagram of an embodiment of a spray head 22 according to the present application. The fire-fighting mechanism 300 comprises a spray head 22 and a blocking part 25, wherein the spray head 22 is provided with an opening, and the blocking part 25 covers the opening; the closure 25 is configured to actuate to open the opening when the ambient temperature reaches a threshold value.

The blocking portion 25 may be a spring brake plug with a temperature sensor, and may be ejected from the opening when the temperature reaches a threshold value. Specifically, the nozzle 22 is further provided with a fixing bracket 27, and the fixing bracket 27 is used for fixing the plugging portion 25 on the nozzle 22.

The number of control components dedicated to the configuration of the sprinkler head 22 can be reduced, and the opening can be automatically opened when a fire-fighting operation to be sprayed occurs.

In some embodiments of the present application, optionally, as shown in fig. 3, fig. 3 is a schematic structural diagram of an embodiment of a spray head 22 according to the present application. The blocking portion 25 is made of a temperature sensitive material.

The plugging portion 25 has a three-dimensional structure plugged at the opening, and may be a cylinder, a flat body, a cuboid, or other shapes, which is not limited in the embodiment of the present application. Specifically, the blocking portion 25 may be made of a material that melts at a temperature of more than 57 ℃. The blocking portion 25 may be, without limitation, polyvinyl chloride, a vinyl chloride copolymer, or the like.

By adopting the heat-sensitive material for the blocking portion 25, when the ambient temperature reaches the threshold value, the coating blocking portion 25 filled in the opening of the nozzle 22 can be automatically melted, so that the opening of the nozzle 22 is opened, and the fire-fighting spraying operation is performed.

In some embodiments of the present application, optionally, as shown in fig. 4 and 5, fig. 4 is a schematic structural diagram of another embodiment of the spray head 22 in the present application, and fig. 5 is a schematic structural diagram of another embodiment of the spray head 22 in the present application. The fire-fighting mechanism 300 further comprises an electric heating element 26 connected to the plugging portion 25, the electric heating element 26 being adapted to heat the plugging portion 25.

The electric heating element 26 may be an electric heating wire, one end of which is connected with a power supply, and the other end of which is connected with the plugging portion 25 for heating the plugging portion 25.

Referring to fig. 4, the electric heating element 26 may be an electric heating wire, one end of which is connected to a power source, and the other end of which is wound around the periphery of the plugging portion 25, so as to uniformly heat the plugging portion 25 during heating and accelerate melting of the plugging portion 25.

Referring to fig. 5, the electric heating element 26 may be an electric heating wire, one end of the electric heating wire is connected with a power supply, and the other end of the electric heating wire is buried in the plugging portion 25, so that the plugging portion 25 is heated uniformly when heated, and a cavity is melted in the plugging portion 25 first, and a heat exchange liquid enters the cavity to accelerate ejection of the plugging portion 25 out of the opening.

Through the arrangement of the electric heating element 26, the fire-fighting mechanism 300 can cooperate with a main control element, such as a battery management system (Battery Management System, BMS), to cooperatively perform fire-fighting operation, and also can open the opening of the spray head 22 when the fire-fighting mechanism 300 is required to actively perform fire-fighting operation.

In some embodiments of the present application, optionally, as shown in fig. 6, fig. 6 is a schematic structural diagram of another embodiment of the present application with the battery pack removed. The energy storage device further includes a housing, wherein the heat exchange mechanism 100, the fire protection mechanism 300, and the plurality of battery packs 200 are all housed within the housing.

Wherein, a plurality of heat exchange mechanisms 100 are arranged in the box body along the first mode at intervals, and the fire-fighting mechanism 300 is arranged corresponding to the heat exchange mechanisms 100.

Referring to fig. 7, fig. 7 is a partial schematic view of the embodiment shown in fig. 6. The box body is also provided with a liquid supply pipeline 111 and a liquid outlet pipeline 112, the extending directions of the liquid supply pipeline 111 and the liquid outlet pipeline 112 are approximately consistent with the arrangement mode of the heat exchange mechanism 100 in the box body, one end of the liquid supply pipeline 111 and one end of the liquid outlet pipeline 112 are connected with an external liquid supply source, such as a cooling water source, and the other end of the liquid supply pipeline is communicated with a channel in the heat exchange mechanism 100, so that heat exchange liquid is circularly output to the heat exchange mechanism 100. Specifically, the tank body is further provided with a liquid supply branch 121 and a liquid outlet branch 122, the liquid supply branch 121 and the liquid outlet branch 122 are provided with a plurality of heat exchange structures, one ends of the liquid supply branch 121 and the liquid outlet branch 122 are respectively communicated with the liquid supply pipeline 111 and the liquid outlet pipeline 112, and the other ends are communicated with the channels in the heat exchange mechanism 100. Without limitation, the liquid supply pipeline 111, the liquid outlet pipeline 112, the liquid supply branch 121 and the liquid outlet branch 122 may be further provided with pipeline valves. The secondary pipe is provided to enable the respective heat exchange mechanisms 100 to be provided.

Through the setting of box, can make fire control mechanism 300 and heat transfer mechanism 100 sharing heat transfer liquid, reduce the pipeline structure in the energy memory, optimize the occupation space in the energy memory, can be convenient for energy memory store a large amount of devices.

In some embodiments of the present application, optionally, as shown in fig. 10, fig. 10 is a schematic block diagram of the embodiment shown in fig. 1. The energy storage device further comprises a sensor 500 and a control unit 400, wherein the sensor 500 and the electric heating element 26 are electrically connected with the control unit 400, the sensor 500 is used for detecting the state of the battery pack 200 and generating a thermal runaway alarm signal, and the control unit 400 controls the electric heating element 26 according to the thermal runaway alarm signal.

In this embodiment, by providing the sensor 500 and the control unit 400, the automatic control of the plugging portion 25 can be achieved, the generation of the thermal runaway alarm signal can more accurately determine the occurrence of thermal runaway by detecting the state of the battery pack 200, and the operation of the electric heating element 26 can be controlled, and after the temperature of the electric heating element 26 increases, the plugging portion 25 is melted, so that the fire-fighting mechanism 300 can operate to perform fire-fighting operation

Wherein in some embodiments, the sensor 500 may be a thermal runaway detection circuit for detecting the battery pack 200 data, and generating a thermal runaway alarm signal when the battery pack 200 data exceeds a safety threshold range.

In some embodiments, the battery pack 200 data may include one or several of the following parameters: the maximum voltage of the battery cells 201 in the battery pack 200 during charging, the actual state of charge of the battery pack 200 during charging, and the charging current of the battery pack 200 during charging.

In some embodiments, the battery pack 200 data may include one or several of the following parameters: the maximum temperature of the battery cells 201 in the battery pack 200, the speed of temperature change of the battery cells 201 in the battery pack 200, the difference between the maximum temperature and the minimum temperature of the battery cells 201 in the battery pack 200, the minimum voltage of the battery cells 201 in the battery pack 200, and the like.

In some embodiments, the battery pack 200 data may include one or several of the following parameters: the minimum voltage of the battery cell 201 in the battery pack 200 and the maximum temperature of the battery cell 201 in the battery pack 200, the minimum voltage of the battery cell 201 in the battery pack 200 and the temperature variation rate of the battery cell 201 in the battery pack 200, the difference between the minimum voltage of the battery cell 201 in the battery pack 200 and the maximum temperature and the minimum temperature of the battery cell 201 in the battery pack 200, the temperature variation rate of the battery cell 201 in the battery pack 200 and the difference between the maximum temperature and the minimum temperature of the battery cell 201 in the battery pack 200, and the like.

In some embodiments, the battery pack 200 data may include a combination of the battery pack 200 data in the above embodiments.

Without limitation, in some embodiments, the battery pack 200 data may include a minimum voltage of the battery cells 201, a maximum temperature of the battery cells 201, and a rate of change of temperature of the battery cells 201 in the battery pack 200. The judging conditions are as follows: 1. the minimum voltage of the battery cell 201 is less than a preset voltage; 2. the highest temperature of the battery cell 201 is greater than a preset temperature; 3. the temperature change rate of the battery cells 201 in the battery pack 200 exceeds a predetermined value and the duration exceeds a preset time, and when any one of the above three conditions occurs, a thermal runaway alarm signal is generated, and the control unit 400 controls the electric heating member 26 to heat.

In other embodiments, the sensor 500 may be a fire sensor, such as a smoke sensor, a flammable gas concentration sensor, etc., and the control unit 400 controls the heating of the electric heater 26 in the event that the status of the battery pack is that smoke is generated, the flammable gas concentration exceeds a threshold, etc.

Through the setting of sensor and control unit, can realize the automatic control to shutoff portion 25, through combining together the inside hidden fire characteristic of group battery 200 and the current voltage value of group battery 200, can be more accurate to hiding the condition of a fire and judge, and then open the opening to fire control operation carries out.

In some embodiments of the present application, optionally, as shown in fig. 7, fig. 7 is a schematic partial structure of the embodiment shown in fig. 6. The heat exchange mechanism 100 further comprises a liquid inlet 11 and a liquid outlet 12 which are communicated with the channel, and the energy storage device further comprises a liquid supply pipeline 111 communicated with the liquid inlet 11 and a liquid outlet pipeline 112 communicated with the liquid outlet 12; at least one of the liquid supply line 111 and the liquid discharge line 112 is installed with a fire-fighting mechanism 300, and at least one of the liquid supply line 111 and the liquid discharge line 112 is provided with a pressurizing member.

Through the setting of secondary pipeline structure, can be convenient for carry out the unified transport of heat transfer liquid in each heat transfer subassembly in the energy memory, reduce the pipeline structure in the energy memory, and through the setting of pressure increasing piece, make the injection of liquid can be through the self pressure control of heat transfer mechanism, also accessible pressure increasing piece control improves the pressure of injection to improve spun angle and distance, and spun water smoke effect.

In some embodiments of the present application, optionally, as shown in fig. 8, fig. 8 is a schematic structural diagram of an embodiment of a fire protection mechanism 300 according to the present application. The fire-fighting mechanism 300 further comprises a fire-fighting pipe 21, one end of the fire-fighting pipe 21 is communicated with the channel, and the spray head 22 is sleeved at the other end of the fire-fighting pipe 21.

Wherein, the one end that fire tube 21 cup jointed with shower nozzle 22 extends in first direction. Specifically, the fire tube 21 may employ a flexible tube.

By providing the fire tube 21, the fire-fighting mechanism 300 and the battery pack 200 can be attached as much as possible, and the heat exchange liquid can be easily sprayed.

In some embodiments of the present application, as shown in fig. 1 and 9, fig. 1 is a schematic structural view of an embodiment of the present application, and fig. 9 is a schematic structural view of the embodiment of fig. 1 after removing a battery pack 200. The heat exchange mechanism 100 further includes a storage tank 13, where the storage tank 13 is disposed to sink in the first direction for storing the battery pack 200.

Through the setting of bin 13, can make energy storage device such as battery package steadily place in bin 13.

In some embodiments of the present application, as shown in fig. 1 and 8, fig. 1 is a schematic structural diagram of an embodiment of the present application, and fig. 7 is a schematic structural diagram of an embodiment of a fire-fighting mechanism 300 of the present application. One end of the fire tube 21 is connected to the storage tank 13, and a top bending 23 is provided at the end of the nozzle 22 on the fire tube 21, and the top bending 23 bends to make the ejection direction of the nozzle 22 face the battery pack 200.

The end of the fire tube 21 connected with the heat exchange mechanism 100 is further provided with a bottom bend 24, and the bottom bend 24 bends to enable the fire tube 21 to extend a distance in a plane parallel to the bottom wall of the storage tank 13 and then extend opposite to the storage tank 13.

The access site through fire tube 21 sets up on the inner wall of holding vessel 13 to extend with holding vessel 13 in opposite directions, can make fire tube 21 completely arrange in inside the energy memory, reduce the protrusion of energy memory week side, optimized the internal architecture of energy memory, secondly, through the setting of top buckling 23, can adjust the extending direction of the fire tube 21 other end, make its skew with first direction, spray the regional fire control area that can fully fill when being convenient for shower nozzle 22 sprays, thirdly, through the setting of bottom buckling 24, can make the fire tube 21 not extend in first direction with the tip position of heat transfer mechanism 100 intercommunication, the heat transfer liquid in the passageway of being convenient for gets into in the fire tube 21.

In some embodiments of the present application, optionally, as shown in fig. 9, fig. 9 is a schematic structural diagram of the embodiment shown in fig. 1 with the battery pack 200 removed. The heat exchange mechanism 100 is also provided with a mounting frame 14 on the periphery, and the mounting frame 14 is used for fixing the heat exchange mechanism 100 with a mounting position.

Wherein the mounting frame 14 is provided with mounting holes 15 for bolting or screwing.

By providing the mounting frame 14, the heat exchanging mechanism 100 can be stably fixed to the mounting position.

In some embodiments of the present application, optionally, as shown in fig. 9, fig. 9 is a schematic structural diagram of the embodiment shown in fig. 1 with the battery pack 200 removed. The liquid inlet 11 and the liquid outlet 12 are arranged on the outer side wall of the heat exchange mechanism 100 at intervals, and the liquid inlet 11 and the liquid outlet 12 are arranged below the mounting frame 14 in the first direction.

Through setting up inlet 11 and liquid outlet 12 in the below of the first direction of installing frame 14, be convenient for inlet 11 and liquid outlet 12 are connected with outside pipeline, and can reduce the protrusion of energy memory week side to make inlet 11 and liquid outlet 12 can be under the protection of installing frame 14, improved energy memory's mechanical strength.

Compared with the prior art, in the energy storage device of the embodiment of the application, the fire-fighting mechanism 300 and the heat exchange mechanism 100 are communicated, so that the fire-fighting mechanism 300 can directly utilize the heat exchange liquid of the heat exchange mechanism 100 to carry out fire-fighting operation, thereby not only guaranteeing the fire-fighting capability in the energy storage device, but also effectively integrating the fire-fighting mechanism 300 and the heat exchange mechanism 100 in the existing energy storage device, and reducing the problems of complicated pipeline in the energy storage device and reduced available space in the energy storage device caused by independently arranging the fire-fighting mechanism 300.

While the application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the application, and in particular, the technical features set forth in the various embodiments may be combined in any manner so long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

An energy storage device, comprising:

the heat exchange mechanism is internally provided with a channel for heat exchange liquid to flow;

a battery pack comprising a plurality of battery cells adjacent to the heat exchange mechanism, the heat exchange liquid for flowing through the heat exchange mechanism to regulate the temperature of the battery pack;

and the fire-fighting mechanism is connected with the heat exchange mechanism and is in fluid communication with the heat exchange mechanism, and is used for spraying the heat exchange liquid towards the battery pack when the battery pack is out of control.
The energy storage device of claim 1, further comprising a plenum through which the heat exchange liquid passes before entering the passage, the plenum being configured to increase the pressure of the heat exchange liquid.
The energy storage device of claim 1 or 2, wherein the fire-fighting mechanism comprises a spray head provided with an opening and a blocking portion covering the opening;

the closure is configured to actuate to open the opening when the ambient temperature reaches a threshold.
The energy storage device of claim 3, wherein the blocking portion is a temperature sensitive material.
The energy storage device of claim 4, wherein the fire mechanism further comprises an electrical heating element coupled to the plug portion, the electrical heating element configured to heat the plug portion.
The energy storage device of claim 5, further comprising a sensor and a control unit, wherein the sensor and the electric heating element are electrically connected with the control unit, the sensor detects the state of the battery pack and generates a thermal runaway alarm signal, and the control unit controls the electric heating element according to the thermal runaway alarm signal.
The energy storage device of any of claims 1-6, further comprising a housing, wherein the heat exchange mechanism, the fire protection mechanism, and the battery pack are all housed within the housing.
The energy storage device of claim 2, wherein the heat exchange mechanism further comprises a liquid inlet and a liquid outlet in communication with the channel, the energy storage device further comprising a liquid supply line in communication with the liquid inlet and a liquid outlet line in communication with the liquid outlet;

at least one of the liquid supply pipeline and the liquid outlet pipeline is provided with the fire-fighting mechanism, and at least one of the liquid supply pipeline and the liquid outlet pipeline is provided with the pressurizing piece.
The energy storage device of any of claims 3-6, wherein the fire mechanism further comprises a fire tube, one end of the fire tube being in communication with the channel, the spray head being sleeved on the other end of the fire tube.
The energy storage device of claim 9, wherein the heat exchange mechanism further comprises a storage tank disposed down in a first direction for storing the battery pack.
The energy storage device of claim 10, wherein one end of the fire tube is connected to the storage tank, and the nozzle end on the fire tube is provided with a top bend, the top bend bending the nozzle in a direction of ejection toward the battery pack.
The energy storage device of claim 8, wherein the heat exchange mechanism is further provided with a mounting frame on a peripheral side thereof, the mounting frame being for securing the heat exchange mechanism in a mounting position.
The energy storage device of claim 12, wherein the liquid inlet and the liquid outlet are disposed at intervals on the outer side wall of the heat exchange mechanism, and the liquid inlet and the liquid outlet are disposed below the mounting frame.