Immersed battery pack, energy storage device and power utilization device

Abstract

The utility model discloses an immersed battery pack, an energy storage device and a power utilization device, and belongs to the technical field of batteries. The immersed battery pack comprises a box body, a cover body and a plurality of single batteries, the box body is provided with a containing cavity with an opening in one end, cooling liquid is arranged in the containing cavity, the box body is provided with a first anti-explosion valve, and the first anti-explosion valve is located above the liquid level of the cooling liquid; the cover body covers the opening; the plurality of single batteries are arranged in the accommodating cavity, a second anti-explosion valve is arranged at one end, far away from the opening, of each single battery, and the second anti-explosion valves are positioned below the liquid level of the cooling liquid. According to the immersed battery pack provided by the invention, the risks of thermal runaway diffusion and combustion explosion of the immersed battery pack are effectively reduced, and the safety performance of the immersed battery pack is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to an immersed battery pack, an energy storage device and an electric device. BACKGROUND

[0002] In the use process of the battery pack, when a single battery occurs thermal runaway, a large amount of heat will be released in a short time, and high-temperature combustible gas will be ejected out. If no reasonable measures are taken, the generated heat and high-temperature combustible gas will cause thermal runaway to spread, and even cause the battery pack to burn and explode. CONTENT OF THE UTILITY MODEL

[0003] To achieve the above-mentioned purpose, the present application has the purpose of providing an immersed battery pack, which aims to solve the technical problem that the heat and high-temperature combustible gas generated after the thermal runaway of a single battery in the prior art will cause thermal runaway to spread, and even cause the battery pack to burn and explode.

[0004] The technical scheme adopted is as follows:

[0005] In a first aspect, the embodiments of the present application provide an immersed battery pack, comprising:

[0006] a box body having an accommodating cavity with one end being open, wherein a cooling liquid is arranged in the accommodating cavity, and the box body is provided with a first explosion-proof valve, and the first explosion-proof valve is located above the liquid level of the cooling liquid;

[0007] a cover body covering the opening;

[0008] a plurality of single batteries arranged in the accommodating cavity, wherein one end of the single battery away from the opening is provided with a second explosion-proof valve, and the second explosion-proof valve is located below the liquid level of the cooling liquid.

[0009] In one of the embodiments of the first aspect, the immersed battery pack further comprises a plurality of insulating supports, and the plurality of insulating supports are arranged on the bottom wall of the accommodating cavity in a spaced manner, and the single battery is arranged on the insulating support.

[0010] In one of the embodiments of the first aspect, the insulating support is provided with a plurality of through holes, and the plurality of through holes are arranged in a spaced manner along the length direction of the insulating support.

[0011] In one of the embodiments of the first aspect, the cooling liquid is insulating, one end of the single battery away from the opening is provided with a pole, and the pole is located below the liquid level of the cooling liquid.

[0012] In one of the embodiments of the first aspect, the submerged battery pack further comprises a battery management module, the box is provided with a partition plate, the partition plate divides the accommodating cavity into a first accommodating groove and a second accommodating groove, the single battery and the cooling liquid are arranged in the first accommodating groove, the first explosion-proof valve is arranged on the side wall of the first accommodating groove, and the battery management module is partially arranged in the second accommodating groove.

[0013] In one of the embodiments of the first aspect, a mounting hole is arranged on the side wall of the first accommodating groove, a hole wall of the mounting hole is provided with internal threads, and an outer circumferential wall of the first explosion-proof valve is provided with external threads matched with the internal threads.

[0014] In one of the embodiments of the first aspect, the submerged battery pack further comprises a signal sampling conductor, the signal sampling conductor is electrically connected with the single battery and the battery management module respectively.

[0015] In one of the embodiments of the first aspect, an avoiding groove is arranged on one end of the partition plate close to the opening, one end of the signal sampling conductor is arranged in the first accommodating groove and electrically connected with the single battery, and the other end of the signal sampling conductor is arranged in the second accommodating groove through the avoiding groove and electrically connected with the battery management module.

[0016] In the second aspect, the application further provides an energy storage device comprising the submerged battery pack in any of the above embodiments.

[0017] In the third aspect, the application further provides an electric device comprising the submerged battery pack in any of the above embodiments.

[0018] Compared with the prior art, the application has the following beneficial effects:

[0019] The application provides an immersed battery pack, an energy storage device and an electric device. The immersed battery pack comprises a box body, a cover body and a plurality of single batteries. The box body has an accommodating cavity with an open end and is provided with a first explosion-proof valve. The cover body is sealed to the opening. The plurality of single batteries are arranged in the accommodating cavity. Cooling liquid is arranged in the accommodating cavity. The first explosion-proof valve is arranged above the liquid level of the cooling liquid. The second explosion-proof valve is arranged below the liquid level of the cooling liquid at the end of the single battery away from the opening. In this way, when the single battery is in thermal runaway, the high-temperature exhaust of the second explosion-proof valve can directly contact the cooling liquid to exchange heat with the high-temperature exhaust, so that the high-temperature exhaust is cooled. After cooling, the high-temperature exhaust is discharged through the first explosion-proof valve above the liquid level of the cooling liquid. The risk of thermal runaway diffusion and combustion explosion of the immersed battery pack is effectively reduced, the safety performance of the immersed battery pack is improved, and the technical problem that the high-temperature exhaust is directly discharged to the outside of the immersed battery pack and burns outside the immersed battery pack, causing the combustion of the energy storage device or the electric device, is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0021] Figure 1 A perspective view of the immersed battery pack in some embodiments of the application is shown.

[0022] Figure 2 A perspective view of the immersed battery pack without the cover body in some embodiments of the application is shown.

[0023] Figure 3 A perspective view of the immersed battery pack without the cover body and the single battery in some embodiments of the application is shown.

[0024] Figure 4 An exploded view of the immersed battery pack in some embodiments of the application is shown.

[0025] Figure 5 A perspective view of the single battery in some embodiments of the application is shown.

[0026] Figure 6 A perspective view of the insulation support in some embodiments of the application is shown.

[0027] Main element symbol explanation:

[0028] 100 - immersed battery pack

[0029] 110 - box body; 111 - opening; 112 - containing cavity; 1121 - first containing groove; 11211 - mounting hole; 1122 - second containing groove; 113 - first explosion-proof valve; 114 - partition plate; 1141 - avoiding groove;

[0030] 120 - cover body;

[0031] 130 - single battery; 131 - second explosion-proof valve; 132 - pole;

[0032] 140 - insulating support; 141 - through hole;

[0033] 150 - battery management module. DETAILED DESCRIPTION

[0034] The embodiments of the present application are described in detail below with reference to the accompanying drawings. The embodiments of the present application described below are examples for explaining the present application and should not be understood as limiting the present application.

[0035] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0036] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0037] In the present application, unless specifically defined and limited otherwise, the terms "mounting", "connected", "connecting", "fixed", and "fixedly" should not be interpreted as being terminally restricted, for example, they can be fixedly connected, or removably connected, or integrated; they can be mechanically connected, or electrically connected; they can be directly connected, or indirectly connected via an intermediate medium; they can be the internal communication of two elements, or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0038] In the present application, unless specifically defined and limited otherwise, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0039] As shown in Figure 1 and Figure 4 Embodiments of the present application provide an immersed battery pack 100, mainly applied to an energy storage device or an electrical device. The immersed battery pack 100 comprises a box body 110, a cover body 120 and a plurality of single batteries 130.

[0040] Referring to Figure 2 and Figure 5 , the box body 110 has a containing cavity 112 with one end opening 111, and the containing cavity 112 is provided with cooling liquid, and the box body 110 is provided with a first explosion-proof valve 113, and the first explosion-proof valve 113 is located above the liquid level of the cooling liquid. The cover body 120 is sealed to the opening 111, and a plurality of single batteries 130 are arranged in the containing cavity 112, and the single battery 130 away from the opening 111 is provided with a second explosion-proof valve 131, and the second explosion-proof valve 131 is located below the liquid level of the cooling liquid.

[0041] The immersion battery pack 100 provided by the embodiment of the present application is provided with cooling liquid in the accommodating cavity 112. The first explosion-proof valve 113 is arranged above the liquid level of the cooling liquid, and the second explosion-proof valve 131 is arranged below the liquid level of the cooling liquid at the end of the monomer battery 130 away from the opening 111. In this way, when the monomer battery 130 is in thermal runaway, the high-temperature exhaust emitted by the second explosion-proof valve 131 can directly contact the cooling liquid to exchange heat with the high-temperature exhaust, so as to cool the high-temperature exhaust. After cooling, the cooled high-temperature exhaust is discharged through the first explosion-proof valve 113 above the liquid level of the cooling liquid. The risk of thermal runaway diffusion and combustion explosion of the immersion battery pack 100 is effectively reduced, the safety performance of the immersion battery pack 100 is improved, and the technical problem that the high-temperature exhaust is directly discharged to the outside of the immersion battery pack 100 and burns outside the immersion battery pack 100, causing the combustion of the energy storage device or the power consumption device, is avoided.

[0042] As shown in Figure 3 and Figure 4 In one embodiment of the present application, the immersion battery pack 100 further comprises a plurality of insulating supports 140. The plurality of insulating supports 140 are arranged on the bottom wall of the accommodating cavity 112 in a spaced manner, and the monomer battery 130 is arranged on the insulating supports 140.

[0043] In the embodiment, the plurality of insulating supports 140 are arranged on the bottom wall of the accommodating cavity 112 in a spaced manner, and the monomer battery 130 is arranged on the insulating supports 140. In this way, the bottom wall of the monomer battery 130 and the adjacent two insulating supports 140 can form a space for accommodating the cooling liquid, thereby increasing the contact area between the bottom wall of the monomer battery 130 and the cooling liquid, and facilitating the cooling of the high-temperature exhaust emitted by the second explosion-proof valve 131 of the monomer battery 130 by directly contacting the cooling liquid.

[0044] For example, the insulating support 140 can be made of polycarbonate, acrylonitrile-styrene-diene copolymer or other plastic materials to reduce the risk of short circuit of the monomer battery 130.

[0045] As shown in Figure 6 In the above embodiment of the present application, the insulating support 140 is provided with a plurality of through holes 141. The plurality of through holes 141 are arranged on the insulating support 140 in a spaced manner along the length direction of the insulating support 140.

[0046] In the embodiment, a plurality of through holes 141 are formed on the insulating support 140 and are arranged at intervals along the length direction of the insulating support 140. In this way, on the one hand, the cooling liquid can enter the space for containing the cooling liquid through the through holes 141, thereby facilitating the cooling of the high-temperature exhaust. On the other hand, the cooled exhaust can also be discharged from the space for containing the cooling liquid through the through holes 141, thereby facilitating the discharge of the exhaust through the first explosion-proof valve 113 located above the liquid level of the cooling liquid.

[0047] As shown in Figure 2 and Figure 5 , in an embodiment of the present application, the cooling liquid can be insulated, and the monomer battery 130 is provided with a pole 132 at the end away from the opening 111, and the pole 132 is located below the liquid level of the cooling liquid.

[0048] In the embodiment, by arranging the pole 132 at the end of the monomer battery 130 away from the opening 111 and below the liquid level of the cooling liquid, the cooling liquid can directly contact the pole 132 to cool and heat the position of the pole 132, thereby effectively improving the heat dissipation efficiency and avoiding the technical problem that the pole is located at the end of the monomer battery away from the liquid cooling plate in the prior art, which makes the heat transfer path longer and results in lower heat dissipation efficiency. At the same time, by arranging the cooling liquid to be insulated, the problem of short circuit of the monomer battery 130 caused by the conductive cooling liquid can be avoided.

[0049] For example, the material of the cooling liquid can be a composite silicon oil with high pressure resistance, high insulation, high heat transfer, and non-flammability.

[0050] As shown in Figure 2 and Figure 3 , in any one of the above embodiments of the present application, the immersion battery pack 100 further comprises a battery management module 150, the box body 110 is provided with a partition plate 114, the partition plate 114 divides the containing cavity 112 into a first containing groove 1121 and a second containing groove 1122, the monomer battery 130 and the cooling liquid are arranged in the first containing groove 1121, the first explosion-proof valve 113 is arranged on the side wall of the first containing groove 1121, and the battery management module 150 is partially arranged in the second containing groove 1122.

[0051] In the embodiment, the single battery 130 and the cooling liquid are arranged in the first accommodating groove 1121, and the battery management module 150 is partially arranged in the second accommodating groove 1122, by arranging the partition plate 114 on the box body 110 to divide the accommodating cavity 112 into the first accommodating groove 1121 and the second accommodating groove 1122, so that the battery management module 150 is prevented from contacting the cooling liquid, thereby reducing the risk of leakage of the cooling liquid through the battery management module 150.

[0052] As shown in Figure 2 and Figure 3 In the above-mentioned embodiments of the present application, the side wall of the first accommodating groove 1121 is provided with a mounting hole 11211, the hole wall of the mounting hole 11211 is provided with internal threads, and the outer circumferential wall of the first explosion-proof valve 113 is provided with external threads matched with the internal threads.

[0053] In the embodiment, the mounting hole 11211 is arranged on the side wall of the first accommodating groove 1121, the internal threads are arranged on the hole wall of the mounting hole 11211, and the external threads matched with the internal threads are arranged on the outer circumferential wall of the first explosion-proof valve 113, so that the first explosion-proof valve 113 is detachably connected with the hole wall of the mounting hole 11211, thereby facilitating the injection of the cooling liquid into the first accommodating groove 1121 or the extraction of the cooling liquid from the first accommodating groove 1121 through the mounting hole 11211, and the mounting hole 11211 integrates the functions of the explosion-proof valve mounting hole, the liquid injection hole and the liquid extraction hole, thereby effectively simplifying the structure and reducing the manufacturing cost.

[0054] In the above-mentioned embodiments of the present application, the immersion battery pack 100 further comprises signal sampling conductors electrically connected with the single battery 130 and the battery management module 150 respectively.

[0055] In the embodiment, the signal sampling conductors electrically connected with the single battery 130 and the battery management module 150 respectively are arranged, so that the battery management module 150 can collect the signals of the single battery 130 through the signal sampling conductors, thereby performing charging, discharging and safety protection operations on the single battery 130 according to the collected data.

[0056] As shown in Figure 2 and Figure 3As shown in the above embodiments of the present application, the partition plate 114 is provided with a avoiding slot 1141 at one end close to the opening 111, one end of the signal sampling conductor is arranged in the first accommodating slot 1121 and electrically connected with the single battery 130, and the other end of the signal sampling conductor is arranged in the second accommodating slot 1122 through the avoiding slot 1141 and electrically connected with the battery management module 150.

[0057] In the embodiments, the avoiding slot 1141 is arranged at one end of the partition plate 114 close to the opening 111 to avoid the signal sampling conductor, so that one end of the signal sampling conductor is arranged in the first accommodating slot 1121 and electrically connected with the single battery 130, and the other end of the signal sampling conductor is arranged in the second accommodating slot 1122 through the avoiding slot 1141 and electrically connected with the battery management module 150.

[0058] The present application also provides an energy storage device comprising the submerged battery pack 100 in the above embodiments.

[0059] The energy storage device has the submerged battery pack 100 in any of the above embodiments, and thus has all the beneficial effects of the submerged battery pack 100, which will not be repeated here.

[0060] The present application also provides an energy storage device comprising the submerged battery pack 100 in the above embodiments.

[0061] The energy storage device has the submerged battery pack 100 in any of the above embodiments, and thus has all the beneficial effects of the submerged battery pack 100, which will not be repeated here.

[0062] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0063] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. An immersion battery pack, characterized by, The immersion battery pack (100) comprises: a box body (110) having a containing cavity (112) with an open end (111), wherein a cooling liquid is arranged in the containing cavity (112), and the box body (110) is provided with a first explosion-proof valve (113) located above the liquid level of the cooling liquid; a cover body (120) sealing the open end (111); a plurality of single batteries (130) arranged in the containing cavity (112), wherein the single batteries (130) are provided with a second explosion-proof valve (131) at an end away from the open end (111), and the second explosion-proof valve (131) is located below the liquid level of the cooling liquid.

2. The submerged battery pack of claim 1, wherein, The immersion battery pack (100) further comprises a plurality of insulating supports (140) arranged on the bottom wall of the containing cavity (112) at intervals, and the single batteries (130) are arranged on the insulating supports (140).

3. The submerged battery pack of claim 2, wherein, The insulating supports (140) are provided with a plurality of through holes (141) arranged at intervals along the length direction of the insulating supports (140).

4. The submerged battery pack of claim 1, wherein, The cooling liquid can be insulated, and the single batteries (130) are provided with a pole (132) at an end away from the open end (111), and the pole (132) is located below the liquid level of the cooling liquid.

5. The submerged battery pack of any one of claims 1-4, wherein, The immersion battery pack (100) further comprises a battery management module (150), and the box body (110) is provided with a partition plate (114) dividing the containing cavity (112) into a first containing groove (1121) and a second containing groove (1122), wherein the single batteries (130) and the cooling liquid are arranged in the first containing groove (1121), the first explosion-proof valve (113) is arranged on the side wall of the first containing groove (1121), and the battery management module (150) is partially arranged in the second containing groove (1122).

6. The submerged battery pack of claim 5, wherein, A mounting hole (11211) is arranged on the side wall of the first containing groove (1121), the hole wall of the mounting hole (11211) has an internal thread, and an external thread is arranged on the peripheral wall of the first explosion-proof valve (113) and matched with the internal thread.

7. The submerged battery pack of claim 5, wherein, The immersion battery pack (100) further comprises a signal sampling conductor electrically connected with the single batteries (130) and the battery management module (150) respectively.

8. The submerged battery pack of claim 7, wherein, The partition plate (114) is provided with an avoiding groove (1141) at an end close to the open end (111), one end of the signal sampling conductor is arranged in the first containing groove (1121) and electrically connected with the single batteries (130), and the other end of the signal sampling conductor is arranged in the second containing groove (1122) through the avoiding groove (1141) and electrically connected with the battery management module (150).

9. An energy storage device, characterized by, The immersion battery pack (100) comprises any one of claims 1-8.

10. An electrical device, characterized by The immersion battery pack (100) comprises any one of claims 1-8.

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