Battery cell tray and energy storage equipment

Abstract

The utility model provides a battery cell tray and energy storage equipment. The battery cell tray comprises a tray which is suitable for being arranged between an upper-layer battery cell and a lower-layer battery cell; wherein a first heat insulation part is arranged on one side, opposite to the upper-layer battery cell, of the tray, and a first heat insulation space for accommodating a cooling medium is formed between the first heat insulation part and the upper-layer battery cell. According to the battery cell tray, the first heat insulation space with the heat insulation function is arranged between the upper-layer battery cell and the tray, heat generated when the lower-layer battery cell is in thermal runaway is blocked, heat transmitted to the upper-layer battery cell is reduced, and the influence of thermal runaway of the lower-layer battery cell on the upper-layer battery cell can be effectively reduced; and the phenomenon of thermal runaway or damage of the upper-layer battery cell can be avoided.

Description

Technical Field

[0001] The present application relates to the field of battery cell technology, and in particular to battery cell trays and energy storage devices. Background Art

[0002] In the field of energy storage batteries, battery capacity and charge and discharge rates are currently the focus of major manufacturers; the gradual increase in battery capacity and charge and discharge rates is a hot topic in the current market. The substantial increase in battery capacity will also lead to increasing heat generation and difficulty in passive heat dissipation of the battery, resulting in severe temperature differences in the battery, which will significantly affect the service life of the battery. At present, common heat dissipation methods such as air cooling and liquid cooling are gradually unable to meet the heat dissipation needs of large-capacity energy storage systems. Other heat dissipation systems with stronger temperature consistency and heat dissipation capabilities are needed to meet the needs of large-capacity energy storage systems. Immersion liquid cooling is a direct liquid cooling method widely used in server heat dissipation. It directly cools the heat-generating components immersed in the liquid through circulating cooling liquid, and has the advantages of large heat dissipation and good temperature consistency. Therefore, immersion liquid cooling has a good application prospect in large-scale energy storage equipment.

[0003] In the immersion liquid-cooled battery cell products in the related technology, there is only one CTS tray structure between the upper part of the battery cell explosion relief valve and the upper module. When the lower battery cell experiences thermal runaway, high-temperature gas is ejected from the explosion relief valve to continuously heat the CTS tray of the upper module. The CTS tray transfers heat to the upper module through heat conduction, which may still cause the upper module to overheat and be damaged, or suffer thermal runaway. Utility Model Content

[0004] The embodiments of the present application provide a battery cell tray and energy storage device, which can improve the technical problem that upper battery cells are easily affected by thermal runaway of lower battery cells, resulting in damage, thermal runaway, etc.

[0005] In a first aspect, an embodiment of the present application provides a battery cell tray, comprising:

[0006] A tray, adapted to be disposed between the upper battery cells and the lower battery cells;

[0007] Wherein, a first heat insulating portion is provided on a side of the tray opposite to the upper battery core, and a first heat insulating space for accommodating a cooling medium is formed between the first heat insulating portion and the upper battery core.

[0008] In one embodiment, the orthographic projection of the first thermal insulation space on the lower battery core at least partially overlaps with the explosion relief valve of the lower battery core.

[0009] In one embodiment, the first heat insulating portion includes a groove, and an opening of the groove faces the upper battery core.

[0010] In one embodiment, the groove depth is between 0.5 mm and 1.5 mm, and the groove width is between 30 mm and 90 mm.

[0011] In one embodiment, a second thermal insulation portion is provided on a side of the tray facing the lower battery core, and a second thermal insulation space for accommodating a cooling medium is formed between the second thermal insulation portion and the lower battery core.

[0012] In one embodiment, the tray includes a tray body and a first protrusion, the tray body is suitable for being arranged between the upper battery cell and the lower battery cell, the first end of the first protrusion is connected to the side of the tray body facing the lower battery cell, and the second end of the first protrusion is used to abut against the lower battery cell to form a first gap between the lower battery cell and the tray body.

[0013] In one embodiment, the tray includes a second protrusion, a first end of the second protrusion is connected to a side of the tray body facing the upper battery cell, and a second end of the second protrusion is used to abut against the upper battery cell to form a second gap between the upper battery cell and the tray body.

[0014] In one embodiment, at least two first thermal insulation parts are formed on a side of the tray facing the upper battery core, and the at least two first thermal insulation parts are arranged side by side.

[0015] In a second aspect, an embodiment of the present application provides an energy storage device, comprising an upper battery cell, a lower battery cell, and the battery cell tray described above, wherein the tray is located between the upper battery cell and the lower battery cell.

[0016] In one embodiment, the plurality of lower layer battery cells are arranged in sequence along the length direction of the first thermal insulation space.

[0017] Beneficial effects of the embodiments of the present application:

[0018] In an embodiment of the present application, a first thermal insulation space with a thermal insulation function is provided between the upper battery cell and the tray, so that the heat generated during thermal runaway of the lower battery cell is blocked, thereby reducing the amount of heat transferred to the upper battery cell. This can effectively reduce the impact of thermal runaway of the lower battery cell on the upper battery cell, and avoid thermal runaway or damage to the upper battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 This is a schematic structural diagram of a battery cell tray provided in an embodiment of the present application;

[0021] Figure 2 Schematic diagram of the structure of a battery tray with upper battery cells installed, provided in an embodiment of the present application;

[0022] Figure 3 This is a schematic diagram of a first structure in which a cell tray provided in an embodiment of the present application is installed between an upper cell and a lower cell;

[0023] Figure 4 This is a second structural diagram of the battery tray provided in an embodiment of the present application installed between the upper battery cells and the lower battery cells;

[0024] Figure 5 This is a third structural diagram of an embodiment of the present application in which the battery tray is installed between the upper battery cells and the lower battery cells. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; and "inside" and "outside" refer to the outline of the device.

[0026] The following combination Figures 1 to 5 Describe the battery cell tray and energy storage device of the present application.

[0027] According to the embodiment of the first aspect of the present application, Figure 1 and Figure 2 The battery cell tray includes a tray 1 adapted to be disposed between an upper battery cell 2 and a lower battery cell 3. A first heat insulating portion 11 is provided on a side of the tray 1 facing the upper battery cell 2, and a first heat insulating space 111 for accommodating a cooling medium is formed between the first heat insulating portion 11 and the upper battery cell 2.

[0028] According to the battery cell tray of the embodiment of the present application, when a first thermal insulation space 111 that can accommodate a cooling medium is formed on the side of the tray 1 facing the upper battery cell 2, when thermal runaway occurs in the lower battery cell 3, when high-temperature gas is ejected from the explosion relief valve, the high-temperature gas contacts the tray 1, and the heat of the high-temperature gas is transferred to the upper battery cell 2 after passing through the first thermal insulation space 111. The cooling medium in the first thermal insulation space 111 can play a role in heat insulation, preventing the heat of the high-temperature gas from being directly transferred to the upper battery cell 2, thereby reducing the amount of heat transferred to the upper battery cell 2. In other words, the present application blocks the heat generated by the lower battery cell 3 during thermal runaway by providing a first thermal insulation space 111 with a thermal insulation function between the upper battery cell 2 and the tray 1, thereby reducing the amount of heat transferred to the upper battery cell 2, effectively reducing the influence of the thermal runaway of the lower battery cell 3 on the upper battery cell 2, and avoiding thermal runaway or damage to the upper battery cell 2.

[0029] In one embodiment of the present application, Figure 1 、 Figure 2 and Figure 3 A second heat insulating portion 12 is provided on the side of the tray 1 facing the lower battery core 3 , and a second heat insulating space 121 for accommodating a cooling medium is formed between the second heat insulating portion 12 and the lower battery core 3 .

[0030] It can be understood that when a second insulating space 121 that can accommodate a cooling medium is formed on the side of the tray 1 facing the lower battery cell 3, when thermal runaway occurs in the lower battery cell 3, when high-temperature gas is ejected from the explosion relief valve, the high-temperature gas will contact the cooling medium in the second insulating space 121 before the high-temperature gas. The cooling medium in the second insulating space 121 can play an insulating role, preventing the high-temperature gas from directly contacting the tray 1, reducing the heat transferred to the tray 1, and thereby reducing the heat transferred to the upper battery cell 2 through the tray 1.

[0031] It can be understood that when the tray 1 is provided with the first insulation part 11 and the second insulation part 12 at the same time, the high-temperature gas when the lower battery cell 3 is out of control, the heat of the high-temperature gas will pass through the second insulation part 12, the tray 1 and the first insulation part 11 in sequence, that is, the heat of the high-temperature gas will be doubly blocked by the cooling medium in the first insulation space 111 and the second insulation space 121, which can doubly absorb the heat of the lower battery cell 3, effectively reducing the heat transferred to the upper battery cell 2.

[0032] Illustratively, the first thermal insulation space 111 may be formed directly on the tray 1 , or may be formed between the tray 1 and the upper battery cells 2 .

[0033] Illustratively, the second thermal insulation space 121 may be formed directly on the tray 1 , or may be formed between the tray 1 and the lower battery cells 3 .

[0034] In one embodiment of the present application, the orthographic projection of the first thermal insulation space 111 on the lower battery core 3 at least partially overlaps with the explosion relief valve of the lower battery core 3 .

[0035] It can be understood that when thermal runaway occurs in the lower battery cell 3, the part of the tray 1 facing the lower battery cell 3 will first come into contact with the high-temperature gas, that is, the temperature of this part of the tray 1 is the highest, and the heat transferred through this part of the tray 1 is also the most. At least part of the first thermal insulation space 111 is set to be in the same line as the explosion relief valve of the lower battery cell 3, that is, at least part of the first thermal insulation space 111 is facing this part of the tray 1, then the first thermal insulation space 111 can effectively block the heat from being transferred to the upper battery cell 2, thereby reducing the heat transferred to the upper battery cell 2 through the tray 1.

[0036] Illustratively, the orthographic projection of the explosion relief valve on the tray 1 is in the first insulation space 111 , ensuring that the high-temperature gas ejected from the explosion relief valve is blocked by the cooling medium in the first insulation space 111 and cannot directly contact the upper battery cell 2 .

[0037] In one embodiment of the present application, Figure 1 、 Figure 2 and Figure 3 The first heat insulating portion 11 includes a groove 112 , and the opening of the groove 112 faces the upper battery core 2 .

[0038] It can be understood that the groove 112 can be used to accommodate a cooling medium. When thermal runaway occurs in the lower battery cell 3, the cooling medium in the groove 112 can act as an insulator, preventing high-temperature gas from directly contacting the upper battery cell 2, and effectively reducing the heat transferred to the upper battery cell 2 through the tray 1.

[0039] In some examples, a first thermal insulation space 111 is formed between a wall surface of the groove 112 facing the upper battery core 2 and the upper battery core 2 .

[0040] In some examples, there is a certain gap between the upper battery cell 2 and the notch of the groove 112, that is, the first thermal insulation space 111 is formed between the upper battery cell 2 and the notch of the groove 112. At this time, the first thermal insulation space 111 and the groove 112 can both be used to accommodate the cooling medium, further reducing the heat transferred from the high-temperature gas to the tray 1 when the lower battery cell 3 thermally runs away.

[0041] Illustratively, the diameter of the end of the upper battery cell 2 is larger than the diameter of the notch to prevent the end of the upper battery cell 2 from being inserted into the groove 112, ensuring that a certain space is formed between the first insulation part 11 and the end of the upper battery cell 2 to accommodate the cooling medium.

[0042] In one embodiment of the present application, the first thermal insulation portion 11 includes a partition block, which is provided between the tray 1 and the upper battery cell 2 to form a first thermal insulation space 111 between the upper battery cell 2 and the tray 1 .

[0043] In one embodiment of the present application, the structure of the second heat insulating portion 12 may be the same as that of the first heat insulating portion 11 , and a detailed description thereof will not be repeated here.

[0044] In one embodiment of the present application, the groove depth of the groove 112 is between 0.5 mm and 1.5 mm, and the groove width of the groove 112 is between 30 mm and 90 mm.

[0045] It can be understood that the groove 112 depth is set between 0.5mm-1.5mm, and the groove width is set between 30mm-90mm, which ensures that the groove 112 can accommodate sufficient cooling medium, so that the cooling medium in the groove 112 can play an effective heat barrier role, ensuring that the heat transferred to the upper battery cell 2 will not be excessive.

[0046] For example, the groove depth of the groove 112 is 1 mm, and the groove width of the groove 112 is 60 mm. It should be noted that the groove depth and groove width of the groove 112 can be any other suitable values ​​and are not particularly limited here.

[0047] For example, the groove depth and groove width of the groove 112 can be adaptively selected according to the specifications of the lower battery cell 3. The larger the capacity of the lower battery cell 3, the more heat the high-temperature gas will generate during thermal runaway, and the corresponding groove depth and groove width of the groove 112 can be larger to ensure that the cooling medium in the groove 112 can effectively block the high-temperature gas in the lower battery cell 3 during thermal runaway.

[0048] In one embodiment of the present application, Figure 4 and Figure 5 The tray 1 includes a tray body and a first protrusion 13. The tray body is suitable for being arranged between the upper battery cell 2 and the lower battery cell 3. The first end of the first protrusion 13 is connected to the side of the tray body facing the lower battery cell 3. The second end of the first protrusion 13 is used to abut against the lower battery cell 3 so that a first gap is formed between the lower battery cell 3 and the tray body.

[0049] It can be understood that the first protrusion 13 separates the side of the tray body facing the lower battery cell 3 from the lower battery cell 3, thereby increasing the distance between the lower battery cell 3 and the tray body, so that a first gap is formed between the lower battery cell 3 and the tray body. The first gap can accommodate a cooling medium, and then when thermal runaway occurs in the lower battery cell 3, the cooling medium at the first gap can block the high-temperature gas, further reducing the heat transferred from the high-temperature gas to the tray body, and improving the safety of the upper battery cell 2.

[0050] Exemplarily, the contact position between the first protrusion 13 and the lower battery core 3 is spaced apart from the explosion relief valve, so that the explosion relief valve can open normally to avoid the first protrusion 13 affecting the heat dissipation of the lower battery core 3 during thermal runaway.

[0051] In one embodiment of the present application, Figure 4 and Figure 5 The tray 1 includes a second protrusion, a first end of the second protrusion 14 is connected to the side of the tray body facing the upper battery cell 2, and a second end of the second protrusion 14 is used to abut against the upper battery cell 2 to form a second gap between the upper battery cell 2 and the tray body.

[0052] It can be understood that the second protrusion 14 separates the side of the tray body facing the upper battery cell 2 from the upper battery cell 2, thereby increasing the distance between the upper battery cell 2 and the tray body, so that a second gap is formed between the upper battery cell 2 and the tray body. The second gap can accommodate a cooling medium, and then when thermal runaway occurs in the lower battery cell 3, after the heat is transferred to the tray body, the heat needs to pass through the cooling medium in the second gap before it can be transferred to the upper battery cell 2. The cooling medium in the second gap can block the heat, further reducing the heat transferred to the upper battery cell 2 and improving the safety of the upper battery cell 2.

[0053] In one embodiment of the present application, at least two second heat insulating portions 12 are formed on a side of the tray 1 facing the explosion relief valve, and the at least two second heat insulating portions 12 are arranged side by side.

[0054] It can be understood that by forming at least two second insulation parts 12 at the tray 1, a second insulation space 121 for accommodating a cooling medium is formed between the at least two second insulation parts 12 and the explosion relief valve of the lower battery cell 3. That is to say, at least two second insulation spaces 121 that can block heat are formed on the side of the tray 1 facing the explosion relief valve, which can effectively block the heat generated when the lower battery cell 3 has thermal runaway, thereby reducing the heat transferred to the tray 1.

[0055] It is understandable that at least two second thermal insulation portions 12 are arranged side by side, and a corresponding lower layer battery cell 3 can be arranged at each second thermal insulation portion 12, and different lower layer battery cells 3 are arranged side by side, thereby ensuring the regularity of the distribution of the lower layer battery cells 3. It should be noted that it is also possible to set only one or a row of lower layer battery cells 3 on one side of the tray 1. When thermal runaway occurs in the lower layer battery cells 3, the high-temperature gas will first directly erupt to one of the second thermal insulation portions 12, and then the high-temperature gas will extend and transfer along the tray 1. When it is transferred to the other second thermal insulation portions 12, the cooling medium in the second thermal insulation space 121 of the other second thermal insulation portions 12 can absorb the heat of the high-temperature gas, thereby reducing the heat transferred to the tray 1.

[0056] In one embodiment of the present application, Figure 1 At least two first heat insulating portions 11 are formed on the side of the tray 1 facing the upper battery core 2 , and at least two second heat insulating portions 12 are arranged side by side.

[0057] It can be understood that by forming at least two second insulation parts 12 at the tray 1, a first insulation space 111 for accommodating a cooling medium is formed between the at least two second insulation parts 12 and the upper battery core 2. That is, at least two first insulation spaces 111 that can block heat are formed on the side of the tray 1 facing the upper battery core 2, which can effectively block the heat generated when the lower battery core 3 has thermal runaway, thereby reducing the heat transferred to the upper battery core 2.

[0058] According to an embodiment of the second aspect of the present application, an energy storage device includes the above-mentioned battery cell tray.

[0059] According to the energy storage device of the embodiment of the present application, a first thermal insulation space 111 that can accommodate a cooling medium is formed on the side of the tray 1 facing the upper battery cell 2. When the lower battery cell 3 experiences thermal runaway, when high-temperature gas is ejected from the explosion relief valve, the high-temperature gas contacts the tray 1, and the heat of the high-temperature gas is transferred to the upper battery cell 2 after passing through the first thermal insulation space 111. The cooling medium in the first thermal insulation space 111 can play a role in heat insulation, preventing the heat of the high-temperature gas from being directly transferred to the upper battery cell 2, thereby reducing the amount of heat transferred to the upper battery cell 2. In other words, the present application blocks the heat generated by the lower battery cell 3 during thermal runaway by providing a first thermal insulation space 111 with a thermal insulation function between the upper battery cell 2 and the tray 1, thereby reducing the amount of heat transferred to the upper battery cell 2, effectively reducing the influence of the thermal runaway of the lower battery cell 3 on the upper battery cell 2, and avoiding thermal runaway or damage to the upper battery cell 2.

[0060] It is understandable that the energy storage device can be a vehicle or a battery swap station, or any other suitable device that requires the use of battery cells as energy.

[0061] In one embodiment of the present application, the energy storage device includes an upper battery cell 2 and a lower battery cell 3 , and the tray 1 is located between the upper battery cell 2 and the lower battery cell 3 .

[0062] It can be understood that the first insulation part 11 and the second insulation part 12 at the tray 1 can effectively block the heat when the lower battery cell 3 is in thermal runaway, effectively reducing the heat transferred to the upper battery cell 2, and preventing the upper battery cell 2 from being affected by the thermal runaway of the lower battery cell 3 and causing thermal runaway or damage.

[0063] In one embodiment of the present application, a plurality of lower-layer battery cells 3 are arranged in sequence along the length direction of the first thermal insulation space 111 .

[0064] It can be understood that no matter which lower battery cell 3 thermally runs away, the cooling medium in the first insulation space 111 can first absorb the heat of the high-temperature gas. The cooling medium in the first insulation space 111 can separate the multiple upper battery cells 2 from the tray 1, thereby preventing the heat of the high-temperature gas from being directly transferred to the upper battery cells 2.

[0065] It can be understood that when only part of the lower battery cells 3 experience thermal runaway, the cooling medium in the corresponding first insulation space 111 of the lower battery cells 3 without thermal runaway can also absorb heat, thereby reducing the temperature of the high-temperature gas when it is transferred to the lower battery cells 3 without thermal runaway.

[0066] The above is a detailed introduction to the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of ​​the present application. At the same time, for those skilled in the art, based on the ideas of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A battery cell tray, characterized in that: include: A tray, adapted to be disposed between the upper battery cells and the lower battery cells; Wherein, a first heat insulating portion is provided on a side of the tray opposite to the upper battery core, and a first heat insulating space for accommodating a cooling medium is formed between the first heat insulating portion and the upper battery core.

2. The battery cell tray according to claim 1, characterized in that: The orthographic projection of the first heat-insulating space on the lower battery core at least partially overlaps with the explosion relief valve of the lower battery core.

3. The battery cell tray according to claim 1, characterized in that: The first heat insulating portion includes a groove, and an opening of the groove faces the upper battery core.

4. The battery cell tray according to claim 3, characterized in that: The groove depth of the groove is between 0.5mm and 1.5mm, and the groove width of the groove is between 30mm and 90mm.

5. The battery cell tray according to claim 1, characterized in that: A second heat insulating portion is provided on a side of the tray facing the lower battery core, and a second heat insulating space for accommodating a cooling medium is formed between the second heat insulating portion and the lower battery core.

6. The battery cell tray according to any one of claims 1 to 5, characterized in that: The tray includes a tray body and a first protrusion, the tray body is suitable for being arranged between the upper battery cell and the lower battery cell, the first end of the first protrusion is connected to the side of the tray body facing the lower battery cell, and the second end of the first protrusion is used to abut against the lower battery cell to form a first gap between the lower battery cell and the tray body.

7. The battery cell tray according to claim 6, characterized in that: The tray includes a second protrusion, a first end of the second protrusion is connected to a side of the tray body facing the upper battery cell, and a second end of the second protrusion is used to abut against the upper battery cell to form a second gap between the upper battery cell and the tray body.

8. The battery cell tray according to any one of claims 1 to 5, characterized in that: At least two first heat insulating parts are formed on a side of the tray facing the upper battery core, and the at least two first heat insulating parts are arranged side by side.

9. An energy storage device, characterized in that: The battery tray comprises an upper battery cell, a lower battery cell and the battery cell tray according to any one of claims 1 to 8, wherein the tray is located between the upper battery cell and the lower battery cell.

10. The energy storage device according to claim 9, characterized in that: Along the length direction of the first heat-insulating space, the plurality of lower-layer battery cells are arranged in sequence.

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