WO2016032101A1

WO2016032101A1 - Energy storage system

Info

Publication number: WO2016032101A1
Application number: PCT/KR2015/006162
Authority: WO
Inventors: 홍영진; 이영재; 이성근; 강순선; 김철환
Original assignee: (주)오렌지파워
Priority date: 2014-08-28
Filing date: 2015-06-18
Publication date: 2016-03-03

Abstract

The present invention provides an energy storage system comprising: a battery module formed by connecting a plurality of hollow secondary batteries that have hollow tubes therein, respectively; a safety module that includes a cooling/heating unit that stores a cooling/heating medium therein and an extinguishing unit that stores an extinguishing medium therein; a first circulation channel that interconnects the battery module and the safety module to circulate the cooling/heating medium or the extinguishing medium between the battery module and the safety module; and a battery management system that measures the temperature and pressure of the battery module and opens the cooling/heating unit or the extinguishing unit to supply the cooling/heating medium or the extinguishing medium to the first circulation channel when the temperature and pressure of the battery module reaches a preset value.

Description

Energy storage system

The present invention relates to an energy storage system, and more particularly, to an energy storage system capable of efficiently extinguishing or cooling a battery module including a plurality of hollow secondary batteries.

Recently, a high output secondary battery using a high energy density nonaqueous electrolyte has been developed, and a plurality of high output secondary batteries can be connected in series so as to be used for driving a motor such as an electric vehicle requiring a large power. The secondary battery is configured.

As described above, one secondary battery is generally composed of a plurality of secondary batteries connected in series. Each of the unit cells includes an electrode assembly in which a positive electrode plate and a negative electrode plate are disposed between separators, and a space part in which the electrode assembly is built. And a cap assembly coupled to the case to seal the cap assembly, a cap protrusion protruding from the cap assembly, and a cap electrically connected to the current collector of the negative electrode plate.

Here, the battery module must be able to easily dissipate heat generated in each unit battery by forming one battery module by connecting several to many dozen unit cells. In addition, the battery is significantly lowered the charge and discharge characteristics of the battery due to the high internal resistance at low temperatures, the life characteristics of the battery is also reduced when the battery is continuously used at a low temperature.

When heat is not released properly, for example, the heat generated from each unit cell causes an increase in the temperature of the battery module, resulting in a malfunction of the device to which the battery module is applied. In particular, the HEV battery module used for a vehicle is charged and discharged with a large current, so that heat is generated by the internal reaction of the secondary battery depending on the use state, and the temperature rises to a considerable temperature, which affects the unique characteristics of the battery. Will degrade the performance. In addition, the battery has a significant decrease in the charging and discharging characteristics of the battery due to high internal resistance at low temperatures. If the battery is continuously used at low temperatures, the battery's lifespan characteristics are also degraded.

Therefore, in the case of the HEV battery module applied to a vehicle, a battery management system is applied to maintain the temperature of the battery module in a proper state and to prevent damage to the battery and safety accidents.

However, the conventional battery module prevents overcharging of the battery under normal operation of the battery management system, and the battery operates properly. However, when the battery management system malfunctions, the battery module may be damaged or overheated due to overcharge. There is a high risk of an accident, and when a fire occurs in the battery module in the prior art, there is a problem that it is difficult to properly cope with this.

That is, in the conventional battery module, the temperature of the battery is managed by the battery management system provided, but when a safety accident such as a fire occurs, a fire extinguishing means is insufficient and there is a problem in that the fire cannot be suppressed quickly.

An object of the present invention is to provide an energy storage system including a new hollow secondary battery that can increase the air conditioning efficiency of hot or cold air supplied from the air conditioner.

In order to solve the above problems, a first embodiment of the present invention includes a battery module in which a plurality of hollow secondary batteries having hollow pipes therein are connected to each other; A safety module including an air conditioning unit for storing a heating and cooling medium, and a fire extinguishing unit for storing a fire extinguishing medium; A first circulation passage connecting the battery module and the safety module to each other so that the heating / cooling medium or the fire fighting medium can circulate between the battery module and the safety module; When the temperature and pressure of the battery module reach a preset value by measuring the temperature and pressure of the battery module, the battery is configured to open the cooling / heating unit or the fire extinguishing unit to supply a cooling / heating medium or a digestive medium to the first circulation passage. Provide an energy storage system, including a management system.

The first circulation passage may include: a first flow passage connecting the pipes of the hollow secondary battery positioned at one end of the safety module and one end of the battery module; And, it comprises a second flow path for connecting the pipe of the hollow secondary battery located at the other end of the safety module and the other end of the battery module.

In addition, a second embodiment of the present invention comprises a housing; A battery module including a plurality of hollow secondary batteries each having a hollow therein, the plurality of battery modules being installed at predetermined intervals in the housing; An air conditioner installed between the battery modules to generate temperature-controlled air; In addition, it provides an energy storage system comprising a second circulation passage for connecting the air conditioner and the plurality of battery modules, respectively, so that air generated by the air conditioner can circulate between the battery module and the air conditioner.

Here, the second circulation passage is divided into a plurality of at one side of the air conditioner third flow path connected to each battery module side; And, the other side of each of the battery module comprises a fourth flow path extending toward the air conditioner.

Here, a fifth flow passage extending out of the housing is provided at one side of the fourth flow passage, and a vent part for selectively opening and closing the fifth flow passage is installed in the fifth flow passage.

Here, the fourth flow path is extended to the air conditioner combined into one tube at a predetermined position for the simplification of the structure and the smooth flow of air.

On the other hand, a fire detector is installed inside the housing.

In addition, the second embodiment of the present invention further includes a fire extinguishing unit installed at one side of the air conditioner to supply the fire extinguishing medium stored therein to the air conditioner so that the air conditioner can supply the fire extinguishing medium to the battery module together with air. It is done by

On the other hand, the heating and cooling medium may be any one of the heating and cooling air and cooling and heating solution, the digestive medium is water, reinforcing liquid, chemical bubbles, air bubbles, carbon dioxide, halides, sodium bicarbonate and potassium hydrogen carbonate, potassium urea bicarbonate, It may be any one of ammonium phosphate and aqueous membrane cloth.

The present invention constitutes a circulation passage for communicating the battery module and the air conditioner so that hot or cold air supplied from the air conditioner is circulated only in the plurality of hollow secondary batteries. Therefore, it is possible to increase the air conditioning efficiency and to reduce the cost of the air conditioner and the air conditioning operation.

In addition, the present invention, including the fire detector and the vent unit when the abnormality in the battery module by supplying the heating and cooling medium and the extinguishing medium through the air conditioner in the battery module can effectively protect the battery during fire or smoke.

1 and 2 are views showing the overall structure of the energy storage system according to the first embodiment of the present invention.

3 is a view showing the overall structure of the energy storage system according to a second embodiment of the present invention.

4 is a view showing air flow in a state in which the fifth flow path is closed by the vent unit according to the present invention.

5 is a view showing air flow in a state in which the fifth flow path is opened by the vent unit according to the present invention.

Hereinafter, preferred embodiments of the present invention, in which the above object can be specifically realized, are described with reference to the accompanying drawings. In describing the present embodiment, the same name and the same reference numerals are used for the same configuration and additional description thereof will be omitted below.

As shown in FIG. 1 and FIG. 2, the energy storage system according to the first embodiment of the present invention includes a battery module 100, a safety module 200, a first circulation passage 300, and a battery management system. 400 is made.

The battery module 100 is formed by connecting a plurality of hollow secondary batteries 110 each having a hollow pipe 111 therein. The hollow secondary battery 110 means a secondary battery having a hollow portion formed therein, as disclosed in a patent application (application number 10-2014-0071943) filed on June 13, 2014 by the inventors of the present application. It is not limited to this.

Here, the plurality of hollow secondary batteries 110 may be connected in series, as shown in Figure 1 so that each pipe 111 is in communication with each other. Of course, when the plurality of hollow secondary batteries 110 are arranged as shown in FIG. 2, the hollow secondary batteries 110 positioned at both ends of the battery module 100 using the first and second connection pipes A and B. The pipes 111 may also communicate with each other.

The safety module 200 includes an air conditioning unit 210 and a fire extinguishing unit 220.

The air-conditioning unit 210 stores a heating / cooling medium supplied to lower the temperature when overheating, fire, or smoke occurs in the battery module 100 to which the plurality of hollow secondary batteries 110 are connected. The type of air-conditioning medium may be any one of air-conditioning air or a heating and cooling solution, but both may be applied as necessary.

The fire extinguishing unit 220 stores a fire extinguishing medium that is supplied to extinguish when overheating, fire, or smoke occurs in the battery module 100. As the extinguishing medium, any one of water, reinforcing liquid, chemical bubble, air bubble, carbon dioxide, halide, sodium hydrogen carbonate and potassium hydrogen carbonate, potassium urea carbonate, ammonium phosphate and aqueous membrane can be used. It is not limited.

The first circulation passage 300 connects the safety module 200 and the battery module 100 to each other so that a heating / cooling medium or a fire extinguishing medium stored in the safety module 200 is connected between the battery module 100 and the safety module 200. Allow it to cycle

The first circulation passage 300 includes a first passage 310 and a second passage 320.

The first flow path 300 connects the pipe 111 of the hollow secondary battery positioned at one end of the safety module 200 and one end of the battery module 100 so that a cooling / heating medium or a fire-extinguishing medium is an air-conditioning unit 210. Alternatively, the fire extinguisher 220 may be supplied to the pipe 111 of the hollow secondary battery communicated with each other.

The second flow path 320 connects the pipe 111 of the hollow secondary battery positioned at the other end of the safety module 200 and the other end of the battery module 100 to sequentially pass through the pipe 111 of the hollow secondary battery. A heating and cooling medium or a fire extinguishing medium is recovered to the safety module 200, that is, the heating and cooling unit 210 or the fire extinguishing unit 220, respectively.

Therefore, the heating / cooling medium or the fire-extinguishing medium flows into the pipe 111 of the hollow secondary battery along the first flow path 310 from the safety module 300 and then passes through the pipe 111 of the hollow secondary battery in communication. After cooling and heating the module 100, the module 100 is recovered along the second flow path 320 to the safety module 200, that is, the heating and cooling unit 210 or the fire extinguishing unit 220.

Here, the first flow path 310 when the pipes 111 of the hollow secondary batteries 110 positioned adjacent to both ends of the battery module 100 are communicated by the first and second connection pipes A and B, respectively. ) Is connected to the first connection pipe (A), the second flow path 320 is connected to the second connection pipe (B) (see Figure 2).

The battery management system 400 monitors the temperature and pressure of the battery module 100 in real time, and is stored in the safety module 200 when overheating, fire, or smoke occurs in the battery module 100. Extinguishing medium or air-conditioning medium is supplied to the first circulation passage (300).

Specifically, the battery management system 400 is a valve (not shown) when the temperature and pressure of the battery module 100 reaches a predetermined value (operating reference temperature: 125 ℃, operating reference pressure: 18.5kgf / cm2) By controlling the air and the like to open the cooling and heating unit 210 or the extinguishing unit 220, the heating and cooling medium or the digestive medium is supplied to the first circulation passage 300.

In this case, the battery management system 400 selectively opens only the heating and cooling unit 210 or the fire extinguishing unit 220 as needed, or simultaneously opens the fire extinguishing unit 220 and the cooling and heating unit 210 at the same time. May be simultaneously supplied to the pipe 111 of the hollow secondary battery through the first flow path 111.

Therefore, when the temperature or pressure of the battery module 100 rises above a certain level or a fire occurs, the heating / cooling unit 210 or the fire extinguishing unit 220 is automatically opened by the battery management system 400 so that the heating / cooling medium or the fire-extinguishing medium is automatically opened. Is supplied to the battery module 100 to prevent overheating and fire of the battery module 100 to prevent a safety accident in advance.

As shown in FIG. 3, the energy storage system according to the second embodiment of the present invention includes a housing 500, a battery module 100, an air conditioner 600, a second circulation passage 700, and safety. Module 200.

The housing 500 accommodates the battery module 100, the second circulation passage 700, the safety module 200, and the air conditioner 600 therein. The housing 500 is preferably made of a material of high rigidity in order to prevent explosion or other safety accidents that may be caused by the fire of the battery module 100.

The battery module 100 includes a plurality of hollow secondary batteries 110 each having a hollow 111 therein, and a plurality of battery modules 100 are installed at predetermined intervals inside the housing 500. Since the structure of the battery module 100 is the same as in the first embodiment, a detailed description thereof will be omitted.

The air conditioner 600 is installed between the plurality of battery modules 100 to generate the air temperature controlled.

The second circulation passage 700 connects the air conditioner 600 and the plurality of battery modules 100 so that the air generated by the air conditioner 600 can circulate between the battery module 100 and the air conditioner 600. do.

The second circulation flow path 700 includes a third flow path 710 and a fourth flow path 720.

The third flow path 710 is branched into a plurality at one side of the air conditioner 600 is connected to one side of each battery module 100. Therefore, the air generated by the air conditioner 600 moves inside each battery module 100 along the third flow path 710.

The fourth flow path 720 extends from the other side of each battery module 100 toward the air conditioner 600, respectively. Therefore, the air passing through each battery module 100 moves to the air conditioner 600 along the fourth flow path 720.

Here, the fourth flow path 720 extending from each battery module 100 is preferably combined into one tube at a predetermined position and extended to the air conditioner 600 for the simplification of the structure and the smooth flow of air.

The safety module 200 is installed on one side of the air conditioner 600, when the fire occurs, such as the air-conditioning unit 600 is supplied to the air conditioning unit 600 and the heating and cooling medium and / or extinguishing medium (B) stored therein as shown in FIG. It is possible to supply the heating and cooling medium and / or the extinguishing medium to the battery module 100 together with the air. Since the internal structure of the safety module 200 is the same as the first embodiment, a detailed description thereof will be omitted.

Meanwhile, a fifth flow path 730 extending to the outside of the housing 500 is installed at one side of the fourth flow path 720, and the fifth flow path 730 selectively opens and closes the fifth flow path 730. Vent portion 800 is installed.

The vent part 800 discharges the mixed air including the smoke and the heating / heating medium and / or the extinguishing medium to the outside of the housing 500 by opening the fifth flow path 730 when a fire occurs in the battery module 100. By doing so, it prevents damage to assets and lives caused by toxic gases.

Of course, the vent part 800 opens the fifth flow path 730 to improve cooling efficiency even when a fire does not occur, and the high temperature air having a temperature rise while passing through the battery module 100 is outside the housing 500. Can be discharged.

Meanwhile, a fire detector 900 may be installed inside the housing 500. The fire detector 900 is installed between the hollow secondary battery 110 and the third flow path 710 or between the hollow secondary battery 110 and the fourth flow path 720 to detect whether a fire has occurred. . The fire detector 900 includes a differential detector using the expansion of air and a heat detector using the accumulation of heat.

The operation process of the energy storage system according to the second embodiment of the present invention configured as described above will be briefly described as follows.

4 is a view showing an air flow in a state in which the fifth flow path is closed by the vent part according to the present invention, and FIG. 5 is a view of the air flow in a state in which the fifth flow path is opened by the vent part according to the present invention. It is a figure which shows.

First, in other words, if there is no separate signal from the fire detector 900, as shown in Figure 4, by closing the fifth flow path 730 by using the vent part 800, the air conditioner 600 is operated to operate the air Generate. As the fifth flow path 730 is closed, the air generated by the air conditioner 600 sequentially moves to the third flow path 710, the battery module 100, the fourth flow path 720, and the air conditioner 600.

Here, the air flowing into the battery module 100 along the third flow path 710 passes through the pipe 111 of each hollow secondary battery 110 and cools the battery module 100, and then the fourth flow path ( 720).

In addition, when a fire occurs in the battery module 100, that is, when a fire signal is received from the fire detector 900, as shown in FIG. 5, the fifth flow path 730 is opened using the vent part 800. After operating the safety module 200 and the air conditioner 600 at the same time to ensure that the cooling medium and / or digesting medium (B) and the air is supplied to each battery module 100 together through the third flow path (710).

In this case, the air further passing through the battery module 100 and further including toxic gas and smoke is not moved to the air conditioner 600 through the fourth flow path 720, and the fifth flow path 730 opened as shown in FIG. 5. Exhausted through the housing 500 through).

It should be noted that the detailed description of the present invention described above is merely illustrative for the purpose of understanding the present invention and is not intended to limit the scope of the present invention. The scope of the invention is defined by the claims appended hereto, and it should be understood that all simple modifications and changes within this scope are within the scope of the invention.

Claims

A battery module formed by connecting a plurality of hollow secondary batteries each having a hollow pipe therein;

A safety module including an air conditioning unit for storing a heating and cooling medium, and a fire extinguishing unit for storing a fire extinguishing medium;

A first circulation passage connecting the battery module and the safety module to each other so that the heating / cooling medium or the fire fighting medium can circulate between the battery module and the safety module; And,

Battery management system for measuring the temperature and pressure of the battery module when the temperature and pressure of the battery module reaches a predetermined value, by opening the air-conditioning unit or the fire extinguishing unit to supply the heating and cooling medium or the digestive medium to the first circulation passage Energy storage system comprising a.
According to claim 1,

The first circulation passage,

A first flow path connecting the pipes of the hollow secondary battery positioned at one end of the safety module and one end of the battery module; And,

And a second flow path connecting the other end of the safety module and the pipe of the hollow secondary battery positioned at the other end of the battery module.
According to claim 1,

The extinguishing medium is any one of water, reinforcing liquid, chemical bubble, air bubble, carbon dioxide, halide, sodium hydrogen carbonate and potassium hydrogen carbonate, potassium urea carbonate, ammonium phosphate, aqueous membrane fabric.
According to claim 1,

The heating and cooling medium is an energy storage system, characterized in that any one of heating and cooling air and heating and cooling solution.
housing;

A battery module including a plurality of hollow secondary batteries each having a hollow pipe therein, the plurality of battery modules being installed at predetermined intervals in the housing;

An air conditioner installed between the battery modules to generate temperature-controlled air; And,

And a second circulation passage connecting the air conditioner and the plurality of battery modules, respectively, to allow air generated by the air conditioner to circulate between the battery module and the air conditioner.
The method of claim 5,

The second circulation passage,

A third flow passage branched from one side of the air conditioner and connected to one side of each battery module; And,

And a fourth flow path extending from the other side of each battery module toward the air conditioner, respectively.
The method of claim 6,

One side of the fourth flow path is provided with a fifth flow path extending out of the housing, the fifth flow path is an energy storage system, characterized in that the vent section for selectively opening and closing the fifth flow path.
The method of claim 6,

The fourth flow path is an energy storage system, characterized in that the unit is extended to the air conditioner combined into a single pipe at a predetermined position for the simplification of the structure and the smooth flow of air.
The method of claim 5,

Energy storage system, characterized in that the fire detector is installed inside the housing.
The method of claim 5,

It is installed on one side of the air conditioner further comprises a safety module for supplying a heating and cooling medium and / or fire extinguishing medium to the air conditioner in the event of a fire, such that the air conditioner to supply the heating and cooling medium and / or fire extinguishing medium to the battery module together with the air. Energy storage system.
The method of claim 10,

The extinguishing medium is any one of water, reinforcing liquid, chemical bubble, air bubble, carbon dioxide, halide, sodium hydrogen carbonate and potassium hydrogen carbonate, potassium urea carbonate, ammonium phosphate, aqueous membrane fabric.