Energy storage device

Abstract

The utility model relates to an energy storage device. The energy storage device comprises a box body and a mechanical valve, the box body is provided with a first chamber and a second chamber which are arranged in a spaced mode, and the mechanical valve is arranged in the box body and provided with a first valve port communicated with the adjacent first chamber and a second valve port communicated with the adjacent second chamber. The mechanical valve is constructed to enable airflow to flow from the second valve port to the first valve port and limit the airflow to flow from the first valve port to the second valve port. Because the mechanical valve does not need to be provided with a special fire-fighting wiring, the installation of the mechanical valve is simplified, and the design and production cost of the energy storage device is also reduced.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to an energy storage device. Background Art

[0002] An energy storage container usually includes a plurality of compartments arranged at intervals, and adjacent compartments are usually connected to each other through electrically controlled fire dampers to allow ventilation and heat dissipation between the compartments. However, this makes the installation of fire dampers of traditional energy storage containers more complicated. Utility Model Content

[0003] Based on this, it is necessary to provide an energy storage device to address the problem that the installation of fire dampers of traditional energy storage containers is relatively complicated.

[0004] The present application provides an energy storage device, comprising:

[0005] A box body having a first chamber and a second chamber arranged at intervals; and

[0006] a mechanical valve, disposed in the housing, and having a first valve port communicating with an adjacent first chamber, and a second valve port communicating with an adjacent second chamber;

[0007] The mechanical valve is configured to allow airflow to flow from the second valve port to the first valve port, and to restrict airflow from the first valve port to the second valve port.

[0008] In one embodiment, the box has a plurality of the first chambers and a plurality of the second chambers;

[0009] The energy storage device includes a plurality of mechanical valves connected to the first chamber and the second chamber in a one-to-one correspondence.

[0010] In one embodiment, the box body includes a box shell, a plurality of first partitions arranged at intervals along a first direction, and a plurality of second partitions intersecting with the first partitions;

[0011] The box shell defines an inner chamber, and the first partitions divide the inner chamber into a plurality of sub-inner chambers;

[0012] Each of the second partitions divides the corresponding sub-inner chamber into the first chamber and the second chamber spaced apart along the second direction;

[0013] The mechanical valve is embedded on the corresponding first baffle, the corresponding second baffle and / or the side wall of the box shell extending along the second direction;

[0014] The first direction and the second direction intersect each other.

[0015] In one embodiment, the mechanical valve is configured as a one-way valve embedded in the corresponding second partition plate.

[0016] In one embodiment, the mechanical valve is constructed as a Tesla valve embedded in the corresponding first partition or the side wall of the box shell extending along the second direction;

[0017] The mechanical valve is provided with one end of the first valve port extending to the corresponding first chamber, so that the first valve port can be communicated with the corresponding first chamber;

[0018] The other end of the second valve port of the mechanical valve is extended to the corresponding second chamber so that the second valve port can be communicated with the corresponding second chamber.

[0019] In one of the embodiments, a side wall of the box housing extending along the second direction is defined as a first side wall;

[0020] The first partition plate and the first side wall are respectively provided with a first opening communicating with the first valve port of the corresponding mechanical valve, and the first opening is communicated with the first chamber;

[0021] The first partition plate and the first side wall are respectively provided with a second opening which is communicated with the second valve port of the corresponding mechanical valve, and the second opening is communicated with the second chamber.

[0022] In one embodiment, a mounting cavity is respectively provided on the first partition plate and the first side wall, one end of the mounting cavity is communicated with the corresponding first opening, and the other end of the mounting cavity is communicated with the corresponding second opening;

[0023] The mechanical valve comprises a valve seat which is longitudinally extended along the axial direction of the installation cavity and is arranged in the installation cavity, and a valve core which is spaced apart and arranged in the valve seat;

[0024] The first valve port is provided at one end of the valve seat along the axial direction of the installation cavity, and the second valve port is provided at the other end of the valve seat along the axial direction of the installation cavity;

[0025] The valve seat and the valve core define a Tesla flow channel which is respectively connected to the first valve port and the second valve port.

[0026] In one embodiment, the valve core is disposed in the valve seat along the thickness direction of the valve seat;

[0027] The mechanical valve further comprises a connecting piece, and at least one side of the valve core along the thickness direction of the valve seat is connected to the inner side wall of the installation cavity through the connecting piece;

[0028] The connecting member is configured to melt when the temperature in the installation cavity is lower than a preset temperature value, so that the valve core falls under the action of gravity to block the first valve port and the second valve port.

[0029] In one embodiment, the longitudinal extension direction of the mechanical valve is parallel to the second direction.

[0030] In one embodiment, the longitudinal extension direction of the mechanical valve is arranged at an angle to the second direction and is parallel to the side wall surface of one of the first partitions facing the other first partition.

[0031] In the technical solution of the present application, when the energy storage device is used, on the one hand, the airflow in the second chamber can flow toward the first chamber through the mechanical valve, and the cold air in the second chamber can be sent into the first chamber, thereby realizing ventilation and heat dissipation between the first chamber and the second chamber; on the other hand, since the mechanical valve is constructed to limit the airflow from the first valve port to the second valve port, the airflow in the first chamber can be limited to flow to the corresponding second chamber, and then when the first chamber has thermal runaway or fire, the mechanical valve can be used to limit the heat flow or flame in the first chamber from entering the second chamber, thereby limiting the spread of the fire in the energy storage device, which can improve the safety of the energy storage device. In addition, since the mechanical valve does not need to set up a special fire-fighting line, the installation of the mechanical valve is simplified, which is also conducive to reducing the design and production costs of the energy storage device. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic structural diagram of an energy storage device in an embodiment of the present application is shown.

[0033] Figure 2 A schematic structural diagram of a Tesla valve in an embodiment of the present application is shown.

[0034] Figure 3 Shows Figure 1 A partial enlarged schematic diagram of .

[0035] Figure 4 A schematic diagram of the structure of a Tesla valve in an embodiment of the present application is shown (a schematic diagram of the airflow flowing from the second valve port to the first valve port is provided).

[0036] Figure 5 A schematic diagram of the structure of a Tesla valve in an embodiment of the present application is shown (a schematic diagram of the principle of airflow flowing from the first valve port to the second valve port is provided).

[0037] Figure 6 A structural schematic diagram of a Tesla valve in an embodiment of the present application is shown (when the valve core blocks the first valve port and the second valve port).

[0038] Figure numerals: 10, energy storage device; 100, box body; 110, box shell; 111, first side wall; 120, first partition; 1201, second groove side wall; 130, second partition; 200, mechanical valve; 210, valve seat; 220, valve core; 201, first valve port; 202, second valve port; A, first chamber; B, second chamber; C, first opening; D, second opening; E, installation cavity; L, Tesla flow channel. DETAILED DESCRIPTION

[0039] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0040] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0041] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0042] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0043] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0044] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0045] In traditional energy storage containers, adjacent compartments are usually connected to each other through electrically controlled fire dampers to allow ventilation and heat dissipation between the compartments. The fire dampers can also be closed when thermal runaway or fire occurs in a compartment.

[0046] After research, it was found that the electrically controlled fire damper includes electrically controllable shutters, which makes the fire damper occupy a large installation and maintenance space, and the wiring of the fire damper also requires special fire-fighting pipelines, which makes the installation of the electrically controlled fire damper more complicated and increases the design and production costs of the energy storage container.

[0047] In order to solve at least one of the above-mentioned technical problems, the present application designs an energy storage device, which can use the mechanical valve of the energy storage device to limit the airflow from the first chamber to the second chamber, thereby effectively preventing the heat flow or flame in the first chamber from entering the second chamber, thereby improving the safety of the energy storage device. Moreover, since the mechanical valve does not require the setting of a special fire-fighting wiring, the installation of the mechanical valve is simplified, which is also conducive to reducing the design and production costs of the energy storage device.

[0048] Figure 1 1 shows a schematic diagram of the structure of an energy storage device 10 in an embodiment of the present application. Figure 2 A schematic diagram of the structure of a Tesla valve in an embodiment of the present application is shown.

[0049] See also Figure 1 and Figure 2 An energy storage device 10 provided in one embodiment of the present application includes a box body 100 and a mechanical valve 200 .

[0050] The housing 100 has a first chamber A and a second chamber B that are spaced apart from each other. The mechanical valve 200 is disposed in the housing 100 and has a first valve port 201 that is connected to an adjacent first chamber A, and a second valve port 202 that is connected to an adjacent second chamber B. The mechanical valve 200 is constructed to enable airflow to flow from the second valve port 202 to the first valve port 201, and to restrict airflow from the first valve port 201 to the second valve port 202. In this way, when the energy storage device 10 is used, on the one hand, the airflow in the second chamber B can flow toward the first chamber A through the mechanical valve 200, and the cold air in the second chamber B can be sent into the first chamber A, thereby realizing ventilation and heat dissipation between the first chamber A and the second chamber B; on the other hand, since the mechanical valve 200 is constructed to limit the airflow from the first valve port 201 to the second valve port 202, the airflow in the first chamber A can be limited to flow to the corresponding second chamber B, and then when the first chamber A has thermal runaway or fire, the mechanical valve 200 can be used to limit the heat flow or flame in the first chamber A from entering the second chamber B, thereby limiting the spread of the fire in the energy storage device 10, which can improve the safety of the energy storage device 10. In addition, since the mechanical valve 200 does not need to set up a special fire-fighting line, the installation of the mechanical valve 200 is simplified, which is also conducive to reducing the design and production costs of the energy storage device 10.

[0051] Usually, a heating device is arranged in the first chamber A so that the temperature of the first chamber A is higher than the temperature of the second chamber B. Therefore, the first chamber A can also be named a high-temperature chamber, and the second chamber A can also be named a low-temperature chamber.

[0052] In this way, compared with the second chamber B, the first chamber A is more prone to thermal runaway or fire. By using the mechanical valve 200 to limit the heat flow or flame in the first chamber A from entering the second chamber B, the spread of fire in the energy storage device 10 can be more effectively limited, thereby improving the safety of the energy storage device 10.

[0053] In some embodiments, the housing 100 has a plurality of first chambers A and a plurality of second chambers B, and the energy storage device 10 includes a plurality of mechanical valves 200 connected to the first chambers A and the second chambers B in a one-to-one correspondence.

[0054] Each mechanical valve 200 can be used to achieve ventilation and heat dissipation between the corresponding first chamber A and the corresponding second chamber B. Each mechanical valve 200 can also be used to limit the heat flow or flame in the corresponding first chamber A from entering the corresponding second chamber B, thereby limiting the spread of fire in the energy storage device 10, which can greatly improve the safety of the energy storage device 10.

[0055] In some embodiments, the box body 100 includes a box shell 110, a plurality of first partitions 120 arranged at intervals along a first direction F1, and a plurality of second partitions 130 intersecting with the first partitions 120. The box shell 110 defines an inner chamber, and the plurality of first partitions 120 divide the inner chamber into a plurality of sub-inner chambers. It can be understood that the plurality of sub-inner chambers are arranged at intervals along the first direction F1.

[0056] It can be understood that the number of the first partitions 120 is one less than the number of the sub-inner chambers.

[0057] Each second partition 130 divides the corresponding sub-inner chamber into a first chamber A and a second chamber B spaced apart along the second direction F2, wherein the first direction F1 and the second direction F2 intersect with each other, and the mechanical valve 200 is embedded in the corresponding first partition 120, the corresponding second partition 130 and / or the side wall of the box shell 110 extending along the second direction F2.

[0058] In this embodiment, the first partition 120 is extended longitudinally along the second direction F2, and the opposite ends of the first partition 120 along its longitudinal extension direction are respectively connected to the two opposite side walls of the box shell 110 along the second direction F2, and the second partition 130 is extended along the third direction F3 and connected to the side walls of the box shell 110 along the third direction F3, wherein the first direction F1, the second direction F2 and the third direction F3 intersect with each other, specifically, the first direction F1, the second direction F2 and the third direction F3 are perpendicular to each other, the first direction F1 is parallel to the length direction of the box body 100, the third direction F3 is parallel to the width direction of the box body 100, and the second direction F2 is parallel to the height direction of the box body 100.

[0059] In this way, the mechanical valve 200 can be embedded in the corresponding first partition 120, the corresponding second partition 130 and / or the side wall of the box shell 110 extending along the second direction F2. The mechanical valve 200 can be used to achieve ventilation and heat dissipation between the corresponding first chamber A and the corresponding second chamber B, and to limit the heat flow or flame in the corresponding first chamber A from entering the corresponding second chamber B. The space occupied by the mechanical valve 200 in the box body 100 can also be reduced, which is beneficial to increase the installation space of the battery in the box body 100, and thus the energy density of the energy storage device 10 can be improved.

[0060] In some embodiments, the mechanical valve 200 is configured as a one-way valve (not shown) embedded in the corresponding second partition plate 130 .

[0061] A mounting hole may be provided through each second partition plate 130 along the second direction F2, and a one-way valve may be installed in the mounting hole, so that the one-way valve may be used to allow the airflow in the second chamber B to flow to the first chamber A in one direction.

[0062] In other embodiments, the mechanical valve 200 is constructed as a Tesla valve embedded in the side wall of the corresponding first partition 120 or the box shell 110 extending along the second direction F2. The mechanical valve 200 is provided with a first valve port 201 at one end extending to the corresponding first chamber A, so that the first valve port 201 can be connected to the corresponding first chamber A, and the mechanical valve 200 is provided with a second valve port 202 at the other end extending to the corresponding second chamber B, so that the second valve port 202 can be connected to the corresponding second chamber B.

[0063] In this embodiment, a side wall of the box shell 110 extending along the second direction F2 is defined as the first side wall 111, and the first partition plate 120 and the first side wall 111 are respectively provided with a first opening C connected to the first valve port 201 of the corresponding mechanical valve 200, and the first opening C is connected to the first chamber A, and the first partition plate 120 and the first side wall 111 are respectively provided with a second opening D connected to the second valve port 202 of the corresponding mechanical valve 200, and the second opening D is connected to the second chamber B.

[0064] In this way, due to the characteristics of the Tesla valve, the airflow in the second chamber B can quickly flow to the first valve port 201 through the corresponding second opening D and the corresponding second valve port 202 of the mechanical valve 200, and then flow to the corresponding first chamber A through the first valve port 201 and the corresponding first opening C, while the airflow in the first chamber A is restricted and difficult to flow to the second chamber B, thereby limiting the heat flow or flame in the corresponding first chamber A from entering the corresponding second chamber B.

[0065] In some embodiments, Figure 1 and Figure 3As shown, a side wall of the box shell 110 extending along the second direction F2 is defined as the first side wall 111, and an installation cavity E is respectively provided on the first partition plate 120 and the first side wall 111, one end of the installation cavity E is connected with the corresponding first opening C, and the other end of the installation cavity E is connected with the corresponding second opening D, and the mechanical valve 200 includes a valve seat 210 extending longitudinally along the axial direction of the installation cavity E and arranged in the installation cavity E, and a valve core 220 arranged in the valve seat 210 at intervals, a first valve port 201 is provided at one end of the valve seat 210 along the axial direction of the installation cavity E, and a second valve port 202 is provided at the other end of the valve seat 210 along the axial direction of the installation cavity E, and the valve seat 210 and the valve core 220 define a Tesla flow channel L respectively connected with the first valve port 201 and the second valve port 202.

[0066] See also Figure 4 The Tesla flow channel L can be used to enable the airflow in the second chamber B to quickly flow to the corresponding first chamber A. Please refer to Figure 5 The Tesla flow channel L can also be used to limit the flow of the airflow in the first chamber A toward the second chamber B, thereby limiting the heat flow or flame in the corresponding first chamber A from entering the corresponding second chamber B.

[0067] Specifically, the first partition plate 120 and the first side wall 111 are respectively provided with a first slot with the first opening C as a slot opening, and a second slot with the second opening D as a slot opening. The first slot has a first slot side wall (not shown) along the second direction F2 toward the corresponding second slot, and the second slot has a second slot side wall 1201 (not shown) along the second direction F2 toward the corresponding first slot. Figure 3 As shown in FIG. 1 , the installation cavity E extends from the first groove side wall to the second groove side wall 1201. Thus, one end of the installation cavity E can be connected to the first chamber A through the first opening C, and the other end of the installation cavity E can be connected to the second chamber B through the second opening D.

[0068] In some embodiments, the valve core 220 is arranged in the valve seat 210 along the thickness direction of the valve seat 210. The mechanical valve 200 also includes a connecting piece (not shown in the figure). The valve core 220 is connected to the inner wall of the installation cavity E through the connecting piece on at least one side along the thickness direction of the valve seat 210. The connecting piece is configured to melt when the temperature in the installation cavity E is lower than a preset temperature value, so that the valve core 220 falls under the action of gravity and blocks the first valve port 201 and the second valve port 202.

[0069] Optionally, a thickness direction of the valve seat 210 is parallel to the first direction F1 .

[0070] Optionally, the preset temperature value may be 150°C-200°C.

[0071] Optionally, the material of the connecting piece may be low-temperature tin, or other materials that can melt when the temperature is lower than a preset temperature value.

[0072] The valve core 220 is fixed to the inner wall of the installation cavity E by using a connecting piece, so that the valve core 220 can be fixed at a preset position of the installation cavity E, and the valve core 220 and the valve seat 210 can define the above-mentioned Tesla flow channel L. When the fire barrier of the mechanical valve 200 fails or the second chamber B has a thermal runaway or a fire, the temperature in the installation cavity E can be gradually increased, and the connecting piece can be melted at high temperature, so that the valve core 220 is separated from the inner wall of the installation cavity E, and the valve core 220 can fall downward under the action of gravity to block the first valve port 201 and the second valve port 202, so that the Tesla flow channel L can be blocked (such as Figure 6 As shown), in this way, the second chamber B and the corresponding first chamber A can be fundamentally blocked, thereby improving the fire protection reliability of the mechanical valve 200.

[0073] In some embodiments, the longitudinal extension direction of the mechanical valve 200 is parallel to the second direction F2. It can be understood that in this embodiment, the axial direction of the installation cavity E is parallel to the second direction F2, which can reduce the difficulty of processing the installation cavity E and thus reduce the difficulty of installing the mechanical valve 200.

[0074] In this embodiment, the length of the mechanical valve 200 along its longitudinal extension direction is greater than a preset value.

[0075] The Tesla flow channel L defined by the valve core 220 and the valve seat 210 can be made long enough, thereby better limiting the flow of the airflow in the first chamber A toward the second chamber B, thereby better limiting the heat flow or flame in the corresponding first chamber A from entering the corresponding second chamber B.

[0076] In some other embodiments, the longitudinal extension direction of the mechanical valve 200 is arranged at an angle to the second direction F2 and is parallel to the side wall surface of one of the first partitions 120 facing the other first partition 120 .

[0077] Specifically, the first partition plate 120 is longitudinally extended along the second direction F2.

[0078] In this way, while the size of the first partition 120 along the second direction F2 remains unchanged, the mechanical valve 200 is tilted, which is beneficial to increasing the length of the mechanical valve 200 along its longitudinal extension direction, thereby increasing the length of the Tesla flow channel L, and also better limiting the heat flow or flame in the corresponding first chamber A from entering the corresponding second chamber B.

[0079] The energy storage device 10 of this application, please refer to Figure 4 , the Tesla valve can be used to allow the airflow in the second chamber B to flow quickly to the corresponding first chamber A, see Figure 5The Tesla flow channel L can also be used to limit the flow of the airflow in the first chamber A toward the second chamber B, thereby limiting the heat flow or flame in the corresponding first chamber A from entering the corresponding second chamber B. Figure 6 , when the fire barrier of the mechanical valve 200 fails or when thermal runaway or fire occurs in the second chamber B, the temperature in the installation cavity E can be gradually increased, so that the connecting piece can melt at high temperature, so that the valve core 220 can be separated from the inner wall of the installation cavity E, and the valve core 220 can fall downward under the action of gravity to block the first valve port 201 and the second valve port 202, so that the Tesla flow channel L can be blocked. In this way, the second chamber B and the corresponding first chamber A can be fundamentally blocked, thereby improving the fire protection reliability of the mechanical valve 200.

[0080] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0081] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. An energy storage device, characterized in that: include: The box body has a first chamber and a second chamber which are spaced apart from each other; as well as a mechanical valve, disposed in the housing, and having a first valve port communicating with an adjacent first chamber, and a second valve port communicating with an adjacent second chamber; The mechanical valve is configured to allow airflow to flow from the second valve port to the first valve port, and to restrict airflow from the first valve port to the second valve port.

2. The energy storage device according to claim 1, characterized in that: The box body has a plurality of the first chambers and a plurality of the second chambers; The energy storage device includes a plurality of mechanical valves connected to the first chamber and the second chamber in a one-to-one correspondence.

3. The energy storage device according to claim 1, characterized in that: The box body comprises a box shell, a plurality of first partitions arranged at intervals along a first direction, and a plurality of second partitions intersecting with the first partitions; The box shell defines an inner chamber, and the first partitions divide the inner chamber into a plurality of sub-inner chambers; Each of the second partitions divides the corresponding sub-inner chamber into the first chamber and the second chamber spaced apart along the second direction; The mechanical valve is embedded on the corresponding first baffle, the corresponding second baffle and / or the side wall of the box shell extending along the second direction; The first direction and the second direction intersect each other.

4. The energy storage device according to claim 3, characterized in that: The mechanical valve is constructed as a one-way valve embedded in the corresponding second partition plate.

5. The energy storage device according to claim 3, characterized in that: The mechanical valve is configured as a Tesla valve embedded in the corresponding first partition plate or the side wall of the box shell extending along the second direction; The mechanical valve is provided with one end of the first valve port extending to the corresponding first chamber, so that the first valve port can be communicated with the corresponding first chamber; The other end of the second valve port of the mechanical valve is extended to the corresponding second chamber so that the second valve port can be communicated with the corresponding second chamber.

6. The energy storage device according to claim 5, characterized in that: Define a side wall of the box housing extending along the second direction as a first side wall; The first partition plate and the first side wall are respectively provided with a first opening communicating with the first valve port of the corresponding mechanical valve, and the first opening is communicated with the first chamber; The first partition plate and the first side wall are respectively provided with a second opening which is communicated with the second valve port of the corresponding mechanical valve, and the second opening is communicated with the second chamber.

7. The energy storage device according to claim 6, characterized in that: The first partition plate and the first side wall are respectively provided with installation cavities, one end of the installation cavity is communicated with the corresponding first opening, and the other end of the installation cavity is communicated with the corresponding second opening; The mechanical valve comprises a valve seat which is longitudinally extended along the axial direction of the installation cavity and is arranged in the installation cavity, and a valve core which is spaced apart and arranged in the valve seat; The first valve port is disposed at one end of the valve seat along the axial direction of the installation cavity, and the second valve port is disposed at the other end of the valve seat along the axial direction of the installation cavity; The valve seat and the valve core define a Tesla flow channel which is respectively connected to the first valve port and the second valve port.

8. The energy storage device according to claim 7, characterized in that: The valve core is arranged in the valve seat through the valve seat along the thickness direction of the valve seat; The mechanical valve further comprises a connecting piece, and at least one side of the valve core along the thickness direction of the valve seat is connected to the inner side wall of the installation cavity through the connecting piece; The connecting member is configured to melt when the temperature in the installation cavity is lower than a preset temperature value, so that the valve core falls under the action of gravity to block the first valve port and the second valve port.

9. The energy storage device according to claim 6, characterized in that: The longitudinal extension direction of the mechanical valve is parallel to the second direction.

10. The energy storage device according to claim 6, characterized in that: The longitudinal extension direction of the mechanical valve is arranged at an angle to the second direction and is parallel to a side wall surface of one of the first partitions facing the other first partition.

Images