JP2010061988A - Storage battery device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power storage device capable of preventing gas generated from a power storage element from contacting an electronic device.
A power storage module (10) including a plurality of power storage elements (11), a liquid heat exchange medium (4) for exchanging heat with the power storage elements, and the power storage module and the heat exchange medium are accommodated. A case (20) including a first storage chamber (20a), a second storage chamber (20b) disposed adjacent to the first storage chamber and storing the electronic device (30), And a guide mechanism (40, 41) for moving the gas and the heat exchange medium from the first storage chamber to the second storage chamber in response to generation of gas from the element. The guide mechanism moves the gas to the second storage chamber after the heat exchange medium covers the electronic device in the second storage chamber.
[Selection] Figure 5

Description

  The present invention relates to a power storage device in which a liquid heat exchange medium is housed in a case together with a power storage element.

When a secondary battery is used as a power source for a vehicle, a battery pack including a plurality of secondary batteries is mounted on the vehicle. Moreover, the electronic device used in order to control charging / discharging of a secondary battery is arrange | positioned with the battery pack. Examples of the electronic device include a relay and a monitoring unit for monitoring the state of the secondary battery.
JP 2003-243049 A

  In the secondary battery, gas may be generated due to overcharge or the like. This gas may be generated by, for example, chemical decomposition of the electrolyte contained in the secondary battery. When the electronic device described above is arranged at a position adjacent to the secondary battery, the gas generated from the secondary battery may come into contact with the electronic device, which may cause a malfunction in the operation of the electronic device. is there.

  Accordingly, an object of the present invention is to provide a power storage device that can prevent gas generated from a power storage element from coming into contact with an electronic device.

  The power storage device according to the present invention includes a power storage module including a plurality of power storage elements, a liquid heat exchange medium for performing heat exchange with the power storage elements, and a first storage that stores the power storage module and the heat exchange medium. And a case having a second storage chamber disposed adjacent to the first storage chamber and storing the electronic device, and a gas and a heat exchange medium according to the generation of gas from the power storage element. And a guide mechanism that moves the first storage chamber to the second storage chamber. Then, the guide mechanism moves the gas to the second storage chamber after the heat exchange medium covers the electronic device in the second storage chamber.

  Here, the guide mechanism includes a duct for guiding the heat exchange medium and gas from the first storage chamber to the second storage chamber, and a duct provided according to the pressure state in the first and second storage chambers. And a valve that changes from a closed state to an open state. And by using a duct, after the liquid level of the heat exchange medium that has moved to the second storage chamber reaches a position above the electronic device, the gas can be moved to the second storage chamber. .

  Specifically, the end portion of the duct located in the first accommodation chamber can be positioned below the valve. Moreover, the edge part located in a 2nd storage chamber among ducts can be located upwards rather than an electronic device.

  Further, in the second storage chamber, the gas and the heat exchange medium moved from the first storage chamber can be separated using the action of gravity. Then, the gas separated from the heat exchange medium can be discharged to the outside of the power storage device through a duct connected to the second storage chamber.

  In the present invention, when gas is generated from the electricity storage element, the heat exchange medium is moved to the second storage chamber by the guide mechanism, and then the gas is moved to the second storage chamber. Moreover, the electronic device is covered with a heat exchange medium that moves to the second storage chamber. Thereby, even if gas moves from the 1st accommodation room to the 2nd accommodation room, it can block that gas contacts electronic equipment.

  Examples of the present invention will be described below.

  A configuration of a battery pack (power storage device) that is Embodiment 1 of the present invention will be described with reference to FIG. Here, FIG. 1 is a diagram showing an internal configuration of the battery pack of the present embodiment. In FIG. 1, an X axis, a Y axis, and a Z axis are axes orthogonal to each other, and the Z axis is an axis corresponding to the direction of gravity.

  The battery pack 1 of the present embodiment can be mounted on a vehicle (not shown). Specifically, the battery pack 1 can be fixed to a vehicle floor panel or to a frame such as a side member or a cross member. Such vehicles include hybrid vehicles and electric vehicles. A hybrid vehicle is a vehicle provided with other power sources such as an internal combustion engine and a fuel cell in addition to the battery pack 1 as a power source. The electric vehicle is a vehicle that travels using only the output of the battery pack 1. The battery pack 1 according to the present embodiment outputs energy used for running the vehicle by discharging, or charges kinetic energy generated during braking of the vehicle as regenerative power. It is also possible to perform charging by receiving power supply from the outside of the vehicle.

  The battery pack 1 of this embodiment includes a battery module (storage module) 10, a pack case 20, and an electronic device 30. The configuration of the battery module 10 will be described later. The pack case 20 includes a first storage chamber 20 a that stores the battery module 10, and a second storage chamber 20 b that stores the electronic device 30. Here, the 1st storage chamber 20a and the 2nd storage chamber 20b are partitioned off by the partition part 20c, and are arrange | positioned adjacent to the partition part 20c as a boundary.

  In the present embodiment, the heights (lengths in the Z direction) of the first and second storage chambers 20a and 20b are equal to each other. Further, the widths (lengths in the Y direction) of the first and second storage chambers 20a and 20b are also equal to each other. Note that the heights and widths of the storage chambers 20a and 20b may be different from each other. That is, the first storage chamber 20 a only needs to have a size that can store the battery module 10, and the second storage chamber 20 b only needs to have a size that can store the electronic device 30. However, the pack case 20 can be easily manufactured by making the size of the first and second storage chambers 20a, 20b equal in the Z direction and the Y direction as in the present embodiment.

  The pack case 20 can be formed of a material having excellent thermal conductivity, corrosion resistance, etc., for example, a material having a thermal conductivity equal to or higher than that of the heat exchange medium 4 described later. Specifically, the pack case 20 can be formed of a metal such as aluminum or iron.

  The battery module 10 is fixed to the first storage chamber 20a. In addition to the battery module 10, the first storage chamber 20 a stores a liquid heat exchange medium 4 for performing heat exchange with the battery module 10. The first storage chamber 20 a is filled with the heat exchange medium 4. In other words, the heat exchange medium 4 is in contact with all the inner wall surfaces in the first storage chamber 20a. Note that, depending on the state of filling the heat exchange medium 4 into the first storage chamber 20a, the heat exchange medium 4 is in contact with a part of the inner wall surface (particularly, the upper surface) of the first storage chamber 20a. There may be no.

  Here, the first storage chamber 20a does not have to be filled with the heat exchange medium 4, and a gas layer may be formed in the first storage chamber 20a. For example, an air layer can be provided in the upper space in the first storage chamber 20a. However, as described later, in order to adjust the temperature of the battery module 10 using the heat exchange medium 4, it is preferable that the entire battery module 10 is in contact with the heat exchange medium 4. That is, it is preferable that the battery module 10 is immersed in the liquid phase of the heat exchange medium 4.

  As will be described later, the heat exchange medium 4 is used to adjust the temperature of the battery module 10. The heat exchange medium 4 is a liquid having insulating properties, and for example, oil or a fluorine-based inert liquid can be used. For example, silicon oil can be used as the oil. As the fluorine-based inert liquid, for example, Fluorinert, Novec HFE (hydrofluoroether), and Novec 1230 (manufactured by 3M) can be used.

  In addition, if the surface of the battery module 10 is subjected to an insulation treatment, it is not necessary to use an insulating liquid as the heat exchange medium 4. For example, an insulating layer can be formed on the surface of the battery module 10, and in this case, water that is not excellent in insulation can be used as the heat exchange medium 4.

  Here, the battery module 10 (single cell 11 to be described later) generates heat by charging / discharging, but heat exchange is performed between the battery module 10 and the heat exchange medium 4 by bringing the heat exchange medium 4 into contact with the battery module 10. The heat of the battery module 10 is transmitted to the heat exchange medium 4. The heat exchange medium 4 having heat can flow inside the first storage chamber 20 a and transfer heat to the pack case 20. The heat transferred to the pack case 20 is released into the atmosphere. Thereby, heat dissipation (cooling) of the battery module 10 (unit cell 11) can be performed.

  When the battery module 10 is excessively cooled, the heat transferred to the pack case 20 is transferred to the battery module 10 via the heat exchange medium 4 if the pack case 20 is warmed. Thereby, the temperature fall of the battery module 10 can be suppressed. Thus, heat transfer between the battery module 10 and the pack case 20 can be promoted by storing the heat exchange medium 4 in the pack case 20 (first storage chamber 20a). In addition, if a fan (not shown) for forcibly flowing the heat exchange medium 4 is provided in the first storage chamber 20a, heat transfer through the heat exchange medium 4 can be performed efficiently.

  A first duct 41 is attached to the partition portion 20 c of the pack case 20. That is, the 1st duct 41 is being fixed to the partition part 20c in the state which penetrated the opening part (not shown) formed in the partition part 20c. The first duct 41 is formed by bending, and a region on the end 41a side located in the first storage chamber 20a extends in the Z direction. The end portion 41a faces the bottom surface of the pack case 20, and has an opening for taking in the heat exchange medium 4 and a gas to be described later.

  Further, the end 41 b of the first duct 41 located in the second storage chamber 20 b is located above the electronic device 30. As will be described later, the end 41b has an opening for discharging the heat exchange medium 4 and gas into the second storage chamber 20b. In the present embodiment, the end 41b is disposed so as to face the side wall of the second storage chamber 20b, but is not limited thereto. For example, the end portion 41 b can be disposed so as to face the electronic device 30. In the present embodiment, the region on the end 41b side of the first duct 41 protrudes into the second storage chamber 20b, but it does not have to be protruded. That is, the end 41b can be positioned at a position where the valve 40 is provided.

  A valve 40 is provided in the first duct 41. The valve 40 is disposed above the electronic device 30. The valve 40 changes from a closed state to an open state in accordance with a pressure difference between the first and second storage chambers 20a and 20b. Specifically, when the internal pressure of the first storage chamber 20a is higher than the pressure in the second storage chamber 20b by a predetermined value, the valve 40 is deformed from the closed state to the open state. The valve 40 is a so-called destructive valve, and cannot be returned to the original state (closed state) after being deformed from the closed state to the open state.

  As shown in FIG. 1, when the valve 40 is in the closed state, the heat exchange medium 4 enters the portion of the first duct 41 located in the first storage chamber 20 a.

  As the valve 40, a so-called return type valve can be used instead of the destructive type valve. The return type valve is a valve that can change between a closed state and an open state, and the return type valve can be configured using an elastic member such as a spring. In the configuration of the present embodiment, the return type valve changes between the closed state and the open state according to the difference between the internal pressure of the first storage chamber 20a and the pressure in the second storage chamber 20b. .

  On the other hand, a second duct 42 is attached to the second storage chamber 20b. That is, the 2nd duct 42 is being fixed to the 2nd storage chamber 20b in the state which penetrated the opening part (not shown) formed in the 2nd storage chamber 20b. The second duct 42 is disposed above the electronic device 30.

  The second duct 42 is provided to guide the gas generated from the battery module 10 to the outside of the battery pack 1 as will be described later. Here, another duct (not shown) is attached to a portion of the second duct 42 that protrudes outside the pack case 20. The other duct guides the gas moved to the second duct 42 to the outside of the vehicle and discharges the gas to the outside of the vehicle. Here, the second duct 42 can be disposed at the same position as the valve 40 in the Z direction, or can be disposed at a position different from the valve 40. In the present embodiment, the second duct 42 is disposed at a position above the position of the valve 40.

  Positive and negative cables (not shown) are connected to the battery module 10, and these cables penetrate the partition portion 20 c of the pack case 20 and are arranged in the second storage chamber 20 b. Connected to the electronic device 30. As the electronic device 30, for example, power is supplied to a relay for switching charging / discharging permission / prohibition, a DC / DC converter for converting the output (voltage value) of the battery module 10, and a motor used for running the vehicle. An inverter for supplying is mentioned. The relay is used to prevent a high voltage inrush current.

  Next, the configuration of the battery module 10 will be described with reference to FIG. Here, FIG. 2 is an external perspective view showing the configuration of the battery module 10.

  The battery module 10 has a plurality of unit cells 11, and these unit cells 11 are electrically connected in series. Further, as shown in FIG. 2, the plurality of single cells 11 are arranged in parallel within a predetermined plane (in the XZ plane). Specifically, a secondary battery as a power storage element is used as the single battery 11. Secondary batteries include nickel metal hydride batteries and lithium ion batteries. Note that an electric double layer capacitor (capacitor) as a power storage element may be used instead of the secondary battery.

  Each unit cell 11 is supported by a pair of support plates 12 at both ends. These support plates 12 are fixed to the pack case 20 (first housing chamber 20a) by fastening members (not shown) such as screws. In the present embodiment, two support plates 12 are used, but these support plates 12 may be configured as a single unit. Moreover, the support plate 12 can be formed with resin, for example.

  A positive electrode terminal 11 a and a negative electrode terminal 11 b are provided at both ends of each unit cell 11. The positive electrode terminal 11 a of each unit cell 11 is electrically and mechanically connected to the negative electrode terminal 11 b of another unit cell 11 arranged adjacent to each other via the bus bar 13. Similarly, the negative electrode terminal 11 b of each unit cell 11 is electrically and mechanically connected to the positive electrode terminal 11 a of another unit cell 11 arranged adjacent to the unit cell 11 via the bus bar 13. A desired output can be obtained as the battery module 10 by electrically connecting the plurality of single cells 11 in series via the bus bar 13.

  In this embodiment, as shown in FIG. 2, a so-called cylindrical unit cell 11 is used, but the present invention is not limited to this. That is, the cell 11 having another shape such as a so-called square can be used. When the rectangular unit cells 11 are used, the unit cells 11 can be arranged side by side in one direction and sandwiched by end plates from both ends to constitute a battery module.

  As shown in FIG. 3, the unit cell 11 includes a power generation element 11 c and a battery case 11 d that houses the power generation element 11 c. Here, FIG. 3 is a cross-sectional view showing the internal structure of a part of the unit cell 11. Although FIG. 3 shows the peripheral structure of the positive electrode terminal 11a, the same applies to the peripheral structure of the negative electrode terminal 11b.

  The battery case 11d is preferably formed of a material having excellent durability and corrosion resistance. Specifically, a metal such as aluminum can be used as this material. A positive electrode terminal 11a is fixed to one end surface of the battery case 11d. Here, the positive electrode terminal 11a and the battery case 11d are connected via an insulating seal member (not shown), and the inside of the unit cell 11 is sealed.

  Further, a valve (destructive valve) 11e is provided in a part of the positive electrode terminal 11a. As the valve 11e, as well as the valve 40 described above, not only a destructive type valve but also a return type valve can be used. In this embodiment, the valve 11e is provided on the positive electrode terminal 11a, but the present invention is not limited to this. Specifically, the valve 11e can be provided in the negative electrode terminal 11b, or can be provided in the battery case 11d. That is, it is only necessary that the gas generated inside the unit cell 11 can be released to the outside of the unit cell 11, and the position where the valve 11e is provided can be appropriately set.

  The power generation element 11c includes a positive electrode element, a negative electrode element, and a separator containing an electrolytic solution, and a known configuration can be appropriately applied. In the present embodiment, the power generation element 11c is configured by laminating a positive electrode element, a separator, and a negative electrode element in this order and winding the laminated body. And the positive electrode terminal 11a and the negative electrode terminal 11b are electrically and mechanically connected to the both ends of the electric power generation element 11c. Specifically, the positive electrode terminal 11a is connected to the positive electrode element of the power generation element 11c, and the negative electrode terminal 11b is connected to the negative electrode element of the power generation element 11c.

Here, as a positive electrode element, what formed the positive electrode layer containing an active material on the surface of the current collecting plate formed with metals (an alloy is included), such as aluminum, can be used. As the negative electrode element, one in which a negative electrode layer containing an active material is formed on the surface of a current collector plate made of a metal (including an alloy) such as aluminum can be used. More specifically, in a nickel metal hydride battery, nickel oxide is used as the active material for the positive electrode layer, and MmNi _(5-xyz) Al _x Mn _y Co _z (Mm: A hydrogen storage alloy such as (Misch metal) can be used. In the lithium ion battery, a lithium-transition metal composite oxide can be used as the active material for the positive electrode layer, and carbon can be used as the active material for the negative electrode layer. Note that the positive electrode layer and the negative electrode layer can contain a conductive agent in addition to the active material. In this embodiment, an electrolytic solution is used, but a solid electrolyte can also be used. Examples of the solid electrolyte include inorganic solid electrolytes and organic solid electrolytes.

  When gas is generated from the power generation element 11c due to overcharging or the like, the internal pressure of the unit cell 11 increases. This gas includes, for example, hydrogen gas. When the internal pressure of the unit cell 11 reaches a predetermined value, in other words, the operating pressure of the valve 11e, the valve 11e changes from the closed state to the open state. Thereby, the gas generated from the power generation element 11 c can be released to the outside of the unit cell 11.

  Next, in the battery pack 1 of the present embodiment, the operation when gas is generated from the single battery 11 will be described with reference to FIGS. 4 and 5. Here, FIG. 4 and FIG. 5 are diagrams showing the internal structure of the battery pack 1 and corresponding to FIG.

  When the gas 5 is released to the outside of the unit cell 11 through the valve 11e, the internal pressure of the first storage chamber 20a increases. Here, before the gas 5 is generated from the unit cell 11, the valve 40 is in a closed state, and the inside of the first storage chamber 20a is in a sealed state. For this reason, with the generation of the gas 5, the internal pressure of the first storage chamber 20a increases. When the pressure difference between the first and second storage chambers 20a and 20b reaches a predetermined value (the operating pressure of the valve 40), the valve 40 changes from the closed state to the open state. As a result, the heat exchange medium 4 present in the first storage chamber 20a moves to the second storage chamber 20b via the first duct 41.

  The gas 5 generated from the unit cell 11 moves in the direction opposite to the direction in which gravity acts. Here, the first duct 41 extends downward, and the end 41 a faces the bottom surface side of the pack case 20. For this reason, the heat exchange medium 4 is pushed into the first duct 41 by the pressure of the gas 5, and the heat exchange medium 4 moves to the second storage chamber 20 b via the first duct 41. To do. At this time, the position of the liquid level 4a of the heat exchange medium 4 in the first storage chamber 20a gradually decreases as the amount of gas 5 generated increases.

  The heat exchange medium 4 that has moved to the second storage chamber 20b accumulates in the second storage chamber 20b. Thereby, in the 2nd storage chamber 20b, the position of the liquid level 4b of the heat exchange medium 4 becomes high gradually. In addition, as the heat exchange medium 4 moves to the second storage chamber 20b, the air present in the second storage chamber 20b is discharged to the outside of the battery pack 1 through the second duct 42. The

  In this embodiment, when the liquid level 4a in the first storage chamber 20a reaches the end 41a of the first duct 41, the liquid level 4b in the second storage chamber 20b reaches the upper surface of the electronic device 30. It is like that. Based on this, the position of the end 41a in the Z direction can be determined. That is, the amount of the heat exchange medium 4 that fills the entire electronic device 30 in the second storage chamber 20b is reduced from the amount of the heat exchange medium 4 that fills the first storage chamber 20a. It suffices if the end 41a is located at the position.

  When the liquid level 4a becomes lower than the end portion 41a according to the generation of the gas 5, the gas 5 moves into the first duct 41. Here, the arrow shown with the dotted line of FIG. 5 has shown the movement locus | trajectory (an example) of the gas 5. FIG. When the gas 5 moves to the second storage chamber 20b through the first duct 41, the liquid level 4b of the heat exchange medium 4 is located above the upper surface of the electronic device 30, so that the gas 5 is an electron. There is no contact with the device 30. Thereby, generation | occurrence | production of the malfunction by the gas 5 contacting with the electronic device 30 can be prevented.

  For example, the relay included in the electronic device 30 may generate excessive heat during operation. At this time, if the gas 5 comes into contact with the portion where the heat is generated, the heat may be transferred to the gas 5. In the present embodiment, since the heat exchange medium 4 is used to prevent the gas 5 from coming into contact with the electronic device 30, the above-described problems do not occur.

  Here, the position of the liquid surface 4 b when the gas 5 moves to the second storage chamber 20 b may be higher than the upper surface of the electronic device 30. However, in this embodiment, since the gas 5 is discharged to the outside of the battery pack 1 through the second duct 42, the gas 5 moves from the first duct 41 to the second duct 42. In order to facilitate, it is preferable to determine the position of the liquid surface 4b. In order to set the position of the liquid level 4b, the position of the end face 41a in the first duct 41 may be set.

  In the present embodiment, the first duct 41 is disposed so as to extend in the Z direction, but the present invention is not limited to this. That is, as long as it has the same function as the first duct 41 described in the present embodiment, the arrangement of the first duct 41 can be set as appropriate. For example, the first duct 41 can be arranged in a state of being inclined with respect to the XY plane. Further, the cross-sectional area of the first duct 41 can also be set as appropriate.

  Here, as described above, the first duct 41 has two functions. The first function is to move the heat exchange medium 4 in the first storage chamber 20b to the second storage chamber 20b before the gas 5 moves to the second storage chamber 20b. The second function is to move the heat exchange medium 4 in an amount soaking the entire electronic device 30 to the second storage chamber 20b before the gas 5 moves to the second storage chamber 20b.

  According to the present embodiment, when the gas 5 is generated from the battery module 10 (unit cell 11), the heat exchange medium 4 and the gas 5 can be separated using the second storage chamber 20b. That is, the heat exchange medium 4 from the first storage chamber 20a can be kept in the second storage chamber 20b, and only the gas 5 can be discharged to the outside of the battery pack 1 through the second duct 42. . Thereby, it is possible to prevent the heat exchange medium 4 from being discharged together with the gas 5 to the outside of the battery pack 1.

  Moreover, the battery pack 1 including the electronic device 30 can be reduced in size by arranging the electronic device 30 in the second storage chamber 20b used for the separation of the heat exchange medium 4 and the gas 5. Here, when the electronic device 30 is arranged outside the battery pack 1, a space for arranging the electronic device 30 must be ensured. The second storage chamber 20b is used for separation of the heat exchange medium 4 and the gas 5, but when the gas 5 is not generated, the space in the second storage chamber 20b becomes a dead space. Therefore, by arranging the electronic device 30 in the second storage chamber 20b, the dead space can be effectively used, and the battery pack 1 including the electronic device 30 can be downsized.

  Furthermore, when the gas 5 is generated from the unit cell 11, the heat exchange medium 4 is first moved to the second storage chamber 20b. In the second storage chamber 20b, the gas 5 is moved to the second storage chamber 20b after the liquid level 4b of the heat exchange medium 4 reaches a position above the upper surface of the electronic device 30. Thereby, when the gas 5 moves to the 2nd storage chamber 20b, since the electronic device 30 is covered with the heat exchange medium 4, it can prevent that the electronic device 30 contacts with the gas 5. FIG.

  In addition, by covering the electronic device 30 with the heat exchange medium 4, a member for preventing the gas 5 generated from the unit cell 11 from coming into contact with the electronic device 30, for example, a cover that covers the electronic device 30 is provided. There is no need. Thereby, the number of parts can be reduced and the cost of the battery pack 1 can be reduced.

  In the present embodiment, the electronic device 30 is disposed in the second storage chamber 20b, but is not limited thereto. Specifically, the electronic device 30 can be disposed in the first storage chamber 20 a together with the battery module 10. In this case, the electronic device 30 is immersed in the liquid phase of the heat exchange medium 4 in advance. In this state, even if the gas 5 generated from the battery module 10 comes into contact with the electronic device 30, it is possible to suppress the occurrence of problems due to the gas 5 coming into contact with the electronic device 30.

  For example, the relay as the electronic device 30 may generate excessive heat during operation in the atmosphere. However, if the relay is immersed in the heat exchange medium 4 in advance, it is possible to prevent excessive heat from being generated even when the relay operates. In such a case, the second storage chamber 20b is used only to separate the heat exchange medium 4 and the gas 5. Further, the first duct 41 need not be provided.

It is the schematic which shows the internal structure of the battery pack which is Example 1 of this invention. 1 is an external perspective view of a battery module in Example 1. FIG. FIG. 3 is a schematic diagram showing an internal structure of a single cell in Example 1. In Example 1, it is the schematic which shows the behavior of the heat exchange medium when gas is generated from a cell. In Example 1, it is the schematic which shows the behavior of the gas emitted from the cell.

Explanation of symbols

1: Battery pack (power storage device) 10: Battery module (power storage module)
11: Single cell (power storage element) 20: Pack case 20a: First storage chamber 20b: Second storage chamber 20c: Partition 30: Electronic device 4: Heat exchange medium 4a, 4b: Liquid level 40: Valve 41: First duct 41a: end 42: second duct 5: gas

Claims (11)

A power storage module including a plurality of power storage elements;
A liquid heat exchange medium for performing heat exchange with the electricity storage element;
A case including a first storage chamber that stores the power storage module and the heat exchange medium, and a second storage chamber that is disposed adjacent to the first storage chamber and stores an electronic device;
A guide mechanism for moving the gas and the heat exchange medium from the first storage chamber to the second storage chamber in response to the generation of gas from the power storage element;
The power storage device, wherein the guide mechanism moves the gas to the second storage chamber after the heat exchange medium covers the electronic device in the second storage chamber. The guide mechanism is
A duct for guiding the heat exchange medium and the gas from the first storage chamber to the second storage chamber;
2. The power storage device according to claim 1, further comprising: a valve that is provided in the duct and changes from a closed state to an open state in accordance with a pressure state in the first and second storage chambers.   The duct moves the gas to the second storage chamber after the liquid level of the heat exchange medium that has moved to the second storage chamber reaches a position above the electronic device. The power storage device according to claim 2.   The power storage device according to claim 3, wherein an end portion of the duct located in the first accommodation chamber is located below the valve.   5. The power storage device according to claim 3, wherein an end portion of the duct located in the second housing chamber is located above the electronic device.   The said 2nd storage chamber isolate | separates the said gas and said heat exchange medium which moved from the said 1st storage chamber using the effect | action of gravity. Power storage device.   The power storage device according to claim 6, further comprising a duct that is connected to the second storage chamber and guides the gas separated from the heat exchange medium to the outside of the power storage device.   The power storage device according to claim 1, wherein the heat exchange medium has an insulating property.   The power storage device according to claim 1, wherein the gas includes hydrogen gas.   10. The electronic device according to claim 1, wherein the electronic device is a relay provided between the power storage module and a device that operates by receiving power supply from the power storage module. 10. Power storage device. The power storage device according to claim 1, wherein the power storage element is a lithium ion battery.

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