Energy storage device box body upper cover, energy storage device box body and energy storage device

Abstract

The utility model belongs to the technical field of energy storage products, and discloses an energy storage device box body upper cover, an energy storage device box body and an energy storage device. The energy storage device box body upper cover comprises an upper cover body, a first smoke guide piece, a second smoke guide piece and a fire extinguishing part. The first smoke guide part is arranged on the inner surface of the upper cover body, a first smoke guide channel is defined by the first smoke guide part and the inner surface of the upper cover body, a pressure relief hole communicated with the first smoke guide channel is formed in the first smoke guide part, and the pressure relief hole is configured to be arranged corresponding to a battery cell explosion-proof valve of a battery cell of the energy storage device; the second smoke guide part is arranged on the inner surface of the upper cover body, a second smoke guide channel is defined by the second smoke guide part and the inner surface of the upper cover body, and the second smoke guide channel communicates with the first end of the first smoke guide channel; the fire extinguishing part is arranged on the inner surface of the upper cover body, and a temperature measuring point of the fire extinguishing part is located in the second smoke guide channel. The fire extinguishing part can be started in time, so that the safety of the energy storage device is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage products, in particular to an upper cover of an energy storage device box body, an energy storage device box body and an energy storage device. Background Art

[0002] An energy storage device is an energy storage unit integrated with functional components such as a battery main box body, battery cells, a cooling device, a signal acquisition device, etc., and is usually applied to energy storage and power supply occasions. In order to ensure the safety of the energy storage device, a scheme of spraying fire extinguishing agent through pipelines is generally adopted at the container level of the energy storage device. With the improvement of the fire protection requirements for energy storage devices, a fire protection scheme is also required for the battery packs in the energy storage devices.

[0003] In the prior art, a fire extinguishing component is generally arranged in the battery pack to detect the temperature of the battery cells; when a battery cell has a thermal runaway, the fire extinguishing device sprays.

[0004] However, in the prior art, the temperature measurement points of the fire extinguishing component are placed on some battery cells; if a battery cell at a non-temperature measurement point part has a thermal runaway, the fire extinguishing component cannot spray in time, affecting the safety performance of the energy storage device. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an upper cover of an energy storage device box body, an energy storage device box body and an energy storage device, which can avoid the situation that the fire extinguishing part cannot spray in time and ensure the safety performance of the energy storage device.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The upper cover of the energy storage device box body includes:

[0008] An upper cover body;

[0009] A first smoke guiding member, which is arranged on the inner surface of the upper cover body. The first smoke guiding member and the inner surface of the upper cover body enclose a first smoke guiding channel. A pressure relief hole communicated with the first smoke guiding channel is arranged on the first smoke guiding member, and the pressure relief hole is configured to be correspondingly arranged with the explosion-proof valve of the battery cell of the energy storage device;

[0010] A second smoke guiding member, which is arranged on the inner surface of the upper cover body. The second smoke guiding member and the inner surface of the upper cover body enclose a second smoke guiding channel, and the second smoke guiding channel is communicated with the first end of the first smoke guiding channel;

[0011] A fire extinguishing part, which is arranged on the inner surface of the upper cover body, and the temperature measurement point of the fire extinguishing part is located in the second smoke guiding channel.

[0012] Optionally, the upper cover of the energy storage device box body further includes a box body explosion-proof valve, which is arranged on the outer surface of the upper cover body and communicated with the second end of the first smoke guide channel.

[0013] Optionally, a plurality of the pressure relief holes are arranged on the first smoke guide member.

[0014] Optionally, the number of the first smoke guide members is multiple, and the multiple first smoke guide members are arranged at intervals along the extending direction of the second smoke guide member.

[0015] Optionally, the fire extinguishing part includes:

[0016] A fire extinguishing part body, which is arranged on the inner surface of the upper cover body;

[0017] A temperature-sensitive wire, one end of which is connected to the fire extinguishing part body, and the other end extends into the second smoke guide channel.

[0018] Optionally, a temperature-sensitive wire through hole is arranged on the second smoke guide member, and the other end of the temperature-sensitive wire passes through the temperature-sensitive wire through hole and extends into the second smoke guide channel.

[0019] Optionally, the upper cover of the energy storage device box body further includes a fixing part for the fire extinguishing part body, which is arranged on the inner surface of the upper cover body and fixes the fire extinguishing part body on the inner surface of the upper cover body.

[0020] Optionally, a through hole is arranged on the second smoke guide member, and the first end of the first smoke guide member is located in the through hole.

[0021] The energy storage device box body includes a box body main body, and an electric core accommodating cavity with an upper end opening is arranged in the box body main body. The energy storage device box body further includes the above-mentioned upper cover of the energy storage device box body, and the upper cover body of the upper cover of the energy storage device box body covers the upper end opening of the electric core accommodating cavity.

[0022] The energy storage device includes an electric core, and further includes the above-mentioned energy storage device box body. The electric core is arranged in the electric core accommodating cavity, and the electric core explosion-proof valve of the electric core is in one-to-one correspondence and communication with the pressure relief holes.

[0023] The beneficial effects of the present utility model:

[0024] When the upper cover of the energy storage device box body proposed by the present utility model is applied, it is installed on the box body main body of the energy storage device box body. Electrochemical cells are arranged in the electrochemical cell accommodating cavity of the energy storage box body main body, and the electrochemical cell explosion-proof valve of the electrochemical cell is arranged corresponding to the pressure relief hole; if a thermal runaway of the electrochemical cell occurs, the explosion-proof valve of the electrochemical cell releases high-temperature gas, and the high-temperature gas enters the first smoke guide channel through the pressure relief hole, and then enters the second smoke guide channel through the first smoke guide channel. When the high-temperature gas enters the second smoke guide channel, the temperature measurement point of the fire extinguishing part can detect that the temperature in the second smoke guide channel rises. In this way, it can be judged that there is a thermal runaway of the electrochemical cell, and the fire extinguishing part is started in time to extinguish the fire.

[0025] The energy storage device box body and the energy storage device proposed by the present utility model include the above-mentioned upper cover of the energy storage device box body. Electrochemical cells are arranged in the electrochemical cell accommodating cavity of the energy storage box body main body, and the electrochemical cell explosion-proof valve of the electrochemical cell is arranged corresponding to the pressure relief hole; if a thermal runaway of the electrochemical cell occurs, the explosion-proof valve of the electrochemical cell releases high-temperature gas, and the high-temperature gas enters the first smoke guide channel through the pressure relief hole, and then enters the second smoke guide channel through the first smoke guide channel. When the high-temperature gas enters the second smoke guide channel, the temperature measurement point of the fire extinguishing part can detect that the temperature in the second smoke guide channel rises. In this way, it can be judged that there is a thermal runaway of the electrochemical cell, and the fire extinguishing part is started in time to extinguish the fire. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for description in the embodiments of the present utility model. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the embodiments of the present utility model and these drawings.

[0027] Figure 1 It is a schematic diagram of a perspective view of the upper cover of the energy storage device box body provided by the embodiment of the present utility model;

[0028] Figure 2 It is a schematic diagram of another perspective view of the upper cover of the energy storage device box body provided by the embodiment of the present utility model;

[0029] Figure 3 is Figure 2 The enlarged view of part A in

[0030] Figure 4 It is a schematic diagram of the structure of the first smoke guide member provided by the embodiment of the present utility model;

[0031] Figure 5 is Figure 4 The enlarged view of part B in

[0032] Figure 6 It is a schematic diagram of the structure of the second smoke guide member provided by the embodiment of the present utility model;

[0033] Figure 7 Yes Figure 6 An enlarged view of part C in

[0034] In the figure:

[0035] 1. Upper cover body; 2. First smoke guide member; 21. Pressure relief hole; 3. Second smoke guide member; 31. Temperature sensor wire perforation; 32. Perforation; 4. Fire extinguishing part; 41. Fire extinguishing part body; 42. Temperature sensor wire; 5. Box explosion-proof valve; 6. Fire extinguishing part body fixing member. Specific embodiments

[0036] The following further describes the present utility model in detail with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the sake of description, only parts related to the present utility model rather than all structures are shown in the drawings.

[0037] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0038] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature can include the direct contact between the first and second features, or can include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above and to the right", and "above and on" the second feature includes the first feature being directly above and diagonally above the second feature, or simply indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "below and to the left", and "below and on" the second feature includes the first feature being directly below and diagonally below the second feature, or simply indicating that the first feature has a lower horizontal height than the second feature.

[0039] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "left", and "right" are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for differentiation in description and have no special meaning.

[0040] Embodiment 1

[0041] Refer to Figures 1-6 , this embodiment provides an upper cover of an energy storage device box body, which can be applied to the energy storage device box body of the energy storage device to improve the safety performance of the energy storage device.

[0042] Specifically, the upper cover of the energy storage device box body includes an upper cover body 1, a first smoke guiding member 2, a second smoke guiding member 3 and a fire extinguishing part 4.

[0043] Among them, the first smoke guiding member 2 is arranged on the inner surface of the upper cover body 1. The first smoke guiding member 2 and the inner surface of the upper cover body 1 enclose a first smoke guiding channel. A pressure relief hole 21 communicating with the first smoke guiding channel is arranged on the first smoke guiding member 2, and the pressure relief hole 21 is configured to be correspondingly arranged with the cell explosion-proof valve of the cell of the energy storage device.

[0044] The second smoke guiding member 3 is arranged on the inner surface of the upper cover body 1. The second smoke guiding member 3 and the inner surface of the upper cover body 1 enclose a second smoke guiding channel, and the second smoke guiding channel communicates with the first end of the first smoke guiding channel.

[0045] The fire extinguishing part 4 is arranged on the inner surface of the upper cover body 1, and the temperature measuring point of the fire extinguishing part 4 is located in the second smoke guiding channel.

[0046] When the upper cover of the energy storage device box body provided in this embodiment is applied, it is installed on the box body of the energy storage device box body. A cell is arranged in the cell accommodation cavity of the energy storage box body, and the cell explosion-proof valve of the cell is correspondingly arranged with the pressure relief hole 21; if the cell undergoes thermal runaway, the explosion-proof valve of the cell releases high-temperature gas, and the high-temperature gas enters the first smoke guiding channel through the pressure relief hole 21, and then enters the second smoke guiding channel through the first smoke guiding channel. When the high-temperature gas enters the second smoke guiding channel, the temperature measuring point of the fire extinguishing part 4 can detect that the temperature in the second smoke guiding channel rises. In this way, it can be judged that there is cell thermal runaway, and the fire extinguishing part 4 is started in time to extinguish the fire.

[0047] Compared with the prior art in which the fire extinguishing component cannot be ejected in time, for the upper cover of the energy storage device box body provided in this embodiment, when the cell undergoes thermal runaway, the fire extinguishing part 4 can be started in time to extinguish the fire, ensuring the safety performance of the energy storage device.

[0048] At the same time, in this embodiment, due to the isolation effect of the first smoke guiding member 2 and the second smoke guiding member 3, the high-temperature gas released during the thermal runaway of the cell is located in the first smoke guiding channel and the second smoke guiding channel. In this way, the high-temperature gas will not directly contact the cell, further ensuring the safety performance of the energy storage device.

[0049] Specifically, in this embodiment, a plurality of pressure relief holes 21 are arranged on the first smoke guiding member 2.

[0050] Further, the number of the first smoke guiding members 2 is multiple, and the multiple first smoke guiding members 2 are arranged at intervals along the extending direction of the second smoke guiding member 3.

[0051] Generally, a plurality of battery cells are arranged in the battery cell accommodating cavity of the energy storage device box body, and the plurality of battery cells are arranged in an array.

[0052] The multiple first smoke guiding members 2 are arranged at intervals along the extending direction of the second smoke guiding member 3, and a plurality of pressure relief holes 21 are arranged on each first smoke guiding member 2. In this way, the pressure relief holes 21 can be arranged in one-to-one correspondence with the battery cell explosion-proof valves of the battery cells.

[0053] Specifically, a through hole 32 is arranged on the second smoke guiding member 3, and the first end of the first smoke guiding member 2 is located in the through hole 32. In this way, the first smoke guiding channel and the second smoke guiding channel are communicated.

[0054] Further, in this embodiment, the upper cover of the energy storage device box body further includes a box body explosion-proof valve 5, and the box body explosion-proof valve 5 is arranged on the outer surface of the upper cover body 1 and is communicated with the second end of the first smoke guiding channel.

[0055] In this way, when a thermal runaway occurs in the battery cell, the battery cell explosion-proof valve of the battery cell releases high-temperature gas. A part of the high-temperature gas enters the second smoke guiding channel, and the other part of the high-temperature gas is released from the box body explosion-proof valve 5, further ensuring the safety performance of the energy storage device.

[0056] Specifically, referring to Figure 2 and Figure 3 , in this embodiment, the fire extinguishing part 4 includes a fire extinguishing part body 41 and a temperature-sensitive wire 42.

[0057] The fire extinguishing part body 41 is arranged on the inner surface of the upper cover body 1.

[0058] One end of the temperature-sensitive wire 42 is connected to the fire extinguishing part body 41, and the other end extends into the second smoke guiding channel.

[0059] If the temperature in the second smoke guiding channel is detected to suddenly rise at the other end of the temperature-sensitive wire 42, it indicates that high-temperature gas has entered the second smoke guiding channel. At this time, the fire extinguishing part body 41 is activated and sprays the fire extinguishing agent.

[0060] Specifically, in this embodiment, the fire extinguishing part 4 is a perfluoromethylcyclohexanone automatic fire extinguishing component.

[0061] Specifically, in order to ensure that the other end of the temperature-sensitive wire 42 can be stably located in the second smoke guiding channel, in this embodiment, a temperature-sensitive wire through hole 31 is arranged on the second smoke guiding member 3, and the other end of the temperature-sensitive wire 42 passes through the temperature-sensitive wire through hole 31 and extends into the second smoke guiding channel.

[0062] Further, in order to install the main body 41 of the fire extinguishing part on the inner surface of the upper cover main body 1, the upper cover of the energy storage device box body further includes a fixing member 6 for the main body of the fire extinguishing part. The fixing member 6 for the main body of the fire extinguishing part is arranged on the inner surface of the upper cover main body 1 and fixes the main body 41 of the fire extinguishing part on the inner surface of the upper cover main body 1.

[0063] Specifically, one end of the fixing member 6 for the main body of the fire extinguishing part is fixedly installed on the second smoke guiding member 3, and the other end is provided with a pressing ring adapted to the outer surface of the main body 41 of the fire extinguishing part. The pressing ring presses the main body 41 of the fire extinguishing part against the inner surface of the upper cover main body 1.

[0064] Optionally, in this embodiment, both the first smoke guiding member 2 and the second smoke guiding member 3 are plate members, and the cross sections of both are U-shaped.

[0065] Both the first smoke guiding member 2 and the second smoke guiding member 3 are welded to the inner surface of the upper cover main body 1.

[0066] Embodiment 2

[0067] This embodiment provides an energy storage device box body, which includes a box body main body, and a battery cell accommodating cavity with an open upper end is arranged in the box body main body.

[0068] The upper cover of the energy storage device box body further includes the upper cover of the energy storage device box body in Embodiment 1, and the upper cover main body 1 of the upper cover of the energy storage device box body covers the open upper end of the battery cell accommodating cavity.

[0069] The energy storage device box body provided in this embodiment can fully ensure the safety performance of the energy storage device.

[0070] A battery cell is arranged in the battery cell accommodating cavity of the energy storage box body main body, and the explosion-proof valve of the battery cell corresponds to the pressure relief hole 21; if the battery cell undergoes thermal runaway, the explosion-proof valve of the battery cell releases high-temperature gas, and the high-temperature gas enters the first smoke guiding channel through the pressure relief hole 21, and then enters the second smoke guiding channel through the first smoke guiding channel. When the high-temperature gas enters the second smoke guiding channel, the temperature measuring point of the fire extinguishing part 4 can detect the temperature rise in the second smoke guiding channel. In this way, it can be judged that there is a thermal runaway of the battery cell, and the fire extinguishing part 4 starts to extinguish the fire in time.

[0071] Compared with the prior art in which the fire extinguishing component cannot be ejected in time, in this embodiment, when the battery cell undergoes thermal runaway, the fire extinguishing part 4 can start to extinguish the fire in time to ensure the safety performance of the energy storage device.

[0072] Embodiment 3

[0073] This embodiment provides an energy storage device.

[0074] The energy storage device includes a battery cell, and further includes the energy storage device box body in Embodiment 2. The battery cell is arranged in the battery cell accommodating cavity, and the explosion-proof valve of the battery cell is in one-to-one communication with the pressure relief hole 21.

[0075] The energy storage device provided by this embodiment has relatively high safety performance.

[0076] A battery cell is arranged in the battery cell accommodating cavity of the energy storage box body, and the explosion-proof valve of the battery cell is correspondingly arranged with the pressure relief hole 21; if the battery cell undergoes thermal runaway, the explosion-proof valve of the battery cell releases high-temperature gas, and the high-temperature gas enters the first smoke guiding channel through the pressure relief hole 21, and then enters the second smoke guiding channel through the first smoke guiding channel. When the high-temperature gas enters the second smoke guiding channel, the temperature measuring point of the fire extinguishing part 4 can detect that the temperature in the second smoke guiding channel rises. In this way, it can be judged that there is thermal runaway of the battery cell, and the fire extinguishing part 4 is activated in time to extinguish the fire.

[0077] Compared with the prior art where the fire extinguishing component cannot be ejected in time, in this embodiment, when the battery cell undergoes thermal runaway, the fire extinguishing part 4 can be activated in time to extinguish the fire, ensuring the safety performance of the energy storage device.

[0078] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention, and are not intended to limit the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments, and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. The upper cover of the energy storage device box body, characterized in that Comprising: An upper cover body (1); A first smoke guide member (2) disposed on the inner surface of the upper cover body (1), the first smoke guide member (2) and the inner surface of the upper cover body (1) enclosing a first smoke guide channel, and a pressure relief hole (21) communicating with the first smoke guide channel is provided on the first smoke guide member (2), and the pressure relief hole (21) is configured to be correspondingly disposed with the cell explosion-proof valve of the cell of the energy storage device; A second smoke guide member (3) disposed on the inner surface of the upper cover body (1), the second smoke guide member (3) and the inner surface of the upper cover body (1) enclosing a second smoke guide channel, and the second smoke guide channel communicates with the first end of the first smoke guide channel; A fire extinguishing part (4) disposed on the inner surface of the upper cover body (1), and the temperature measurement point of the fire extinguishing part (4) is located in the second smoke guide channel; A perforation (32) is provided on the second smoke guide member (3), and the first end of the first smoke guide member (2) is located in the perforation (32).

2. The upper cover of the energy storage device box according to claim 1, characterized in that The upper cover of the energy storage device box further includes a box body explosion-proof valve (5), and the box body explosion-proof valve (5) is disposed on the outer surface of the upper cover body (1) and communicates with the second end of the first smoke guide channel.

3. The upper cover of the energy storage device box according to claim 1, characterized in that A plurality of the pressure relief holes (21) are provided on the first smoke guide member (2).

4. The upper cover of the energy storage device box according to claim 1, wherein, The number of the first smoke guide members (2) is multiple, and the multiple first smoke guide members (2) are spaced apart along the extending direction of the second smoke guide member (3).

5. The upper cover of the energy storage device box according to claim 1, characterized in that The fire extinguishing part (4) includes: A fire extinguishing part body (41) disposed on the inner surface of the upper cover body (1); A temperature-sensitive wire (42), one end of which is connected to the fire extinguishing part body (41), and the other end extends into the second smoke guide channel.

6. The upper cover of the energy storage device box according to claim 5, characterized in that, A temperature-sensitive wire perforation (31) is provided on the second smoke guide member (3), and the other end of the temperature-sensitive wire (42) passes through the temperature-sensitive wire perforation (31) and extends into the second smoke guide channel.

7. The upper cover of the energy storage device box according to claim 5, characterized in that, The upper cover of the energy storage device box further includes a fire extinguishing part body fixing member (6), and the fire extinguishing part body fixing member (6) is disposed on the inner surface of the upper cover body (1) and fixes the fire extinguishing part body (41) on the inner surface of the upper cover body (1).

8. The upper cover of the energy storage device box according to any one of claims 1-7, characterized in that, A perforation (32) is provided on the second smoke guide member (3), and the first end of the first smoke guide member (2) is located in the perforation (32).

9. Energy storage device box, including a box body, wherein an upper-end open battery cell accommodating cavity is arranged inside the box body, and it is characterized in that The energy storage device box further includes the upper cover of the energy storage device box according to any one of claims 1-8, and the upper cover body (1) of the upper cover of the energy storage device box covers the upper end opening of the cell accommodating cavity.

10. Energy storage device, including an electrode cell, characterized in that, It further includes the energy storage device box according to claim 9, the cell is disposed in the cell accommodating cavity, and the cell explosion-proof valve of the cell is in one-to-one correspondence and communication with the pressure relief hole (21).

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