Energy storage apparatus and electrical device

Abstract

An energy storage apparatus (100) and an electrical device (200), said apparatus comprising a case body (110), a battery module (120), and a heat insulation plate (130). An isolation plate (140) of the battery module (120) is arranged on a plurality of battery cells (122), a plurality of pressure relief holes (141) corresponding to an explosion-proof valve (124) are formed on the isolation plate (140), and a plurality of bosses (150) are protrudingly provided on the isolation plate (140). A communication end (151) of each boss (150) is in communication with a pressure relief hole (141), and a hollowed-out end (152) supports a thinned area (132) of the heat insulation plate (130).

Description

Energy storage devices and electrical equipment

[0001] Priority information

[0002] This application claims priority and benefits of patent application No. 2023112267991 filed with the State Intellectual Property Office of China on September 22, 2023, and the entire text of which is incorporated herein by reference. Technical Field

[0003] The present application relates to the field of energy storage technology, and in particular to an energy storage device and electrical equipment. Background Art

[0004] A battery pack, as an energy storage device, typically includes a battery module and a battery management system. A battery module consists of multiple battery cells arranged side by side. When a battery cell in a battery module experiences thermal runaway, the high-temperature, high-pressure gas it ejects can severely impact the other battery cells in the pack, compromising the pack's safety.

[0005] Summary of the Invention

[0006] Based on this, it is necessary to provide an energy storage device and electrical equipment to address the problem that a battery cell in thermal runaway may have a serious impact on other battery cells.

[0007] An energy storage device, comprising:

[0008] Box;

[0009] A battery module, the battery module being disposed within the housing, the battery module comprising a plurality of battery cells and a separator, the separator being disposed on the plurality of battery cells and having a plurality of pressure relief holes, the pressure relief holes being disposed corresponding to the explosion-proof valves of the battery cells; and

[0010] A heat insulation plate, the heat insulation plate is provided between the top of the box and the battery module;

[0011] In which, the insulation plate is provided with multiple thinning areas, and the isolation plate is provided with multiple bosses protruding toward the insulation plate, and the multiple bosses are correspondingly arranged between the multiple pressure relief holes and the multiple thinning areas. The bosses are hollow and have a connecting end and a hollow end. The connecting end is connected to the pressure relief hole, and the hollow end supports the thinning area, and the hollow end is hollowed.

[0012] By providing multiple thinning areas on the insulation board and correspondingly providing multiple bosses on the isolation board, wherein the connecting end of the hollow boss is connected to the pressure relief hole and is provided corresponding to the explosion-proof valve, and the hollow end is provided with a hollow portion and is provided corresponding to the thinning area, thereby forming a pressure relief channel between the thinning area and the explosion-proof valve. When the explosion-proof valve is blown due to thermal runaway of the battery cell, high-temperature and high-pressure gas or liquid can break through the thinning area through the pressure relief channel and enter between the insulation board and the top of the box body, preventing the high-temperature and high-pressure gas or liquid from splashing onto other battery cells and damaging other battery cells, thereby improving the thermal safety of the energy storage device; moreover, the thinning area of ​​the insulation board is supported by the hollow end of the boss, which can prevent the high-temperature and high-pressure gas or liquid from impacting the top of the box body and backflowing and reversely breaking through the thinning areas at other positions, thereby avoiding the high-temperature and high-pressure gas or liquid from rushing to other explosion-proof valves, significantly reducing the adverse effects caused by thermal runaway of a certain battery cell, and greatly improving the thermal safety of the energy storage device.

[0013] An electrical device includes: a load and the energy storage device described in the above embodiment, wherein the load is electrically connected to the energy storage device. The electrical device has the same technical effects as the energy storage device described above, and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings that constitute a part of this application are used to provide further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute improper limitations on this application.

[0015] 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 ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0016] FIG1 is a schematic structural diagram of an energy storage device in one embodiment of the present application.

[0017] FIG. 2 is an exploded view of the energy storage device in FIG. 1 from one perspective.

[0018] FIG3 is an exploded view of the energy storage device in FIG1 from another perspective.

[0019] FIG4 is a partial enlarged view of area A in FIG2 .

[0020] FIG5 is a schematic structural diagram of the isolation plate of the energy storage device in FIG2 .

[0021] FIG6 is a schematic structural diagram of the battery module and the heat insulation plate of the energy storage device in FIG1 .

[0022] FIG. 7 is a side view of the structure shown in FIG. 6 .

[0023] FIG8 is a partial cross-sectional view of the structure shown in FIG7.

[0024] FIG9 is a partial enlarged view of area B in FIG8 .

[0025] FIG10 is a partial cross-sectional view of a battery module and a heat insulation plate of an energy storage device in another embodiment of the present application.

[0026] FIG11 is a schematic structural diagram of a battery module and a heat insulation plate of an energy storage device in another embodiment of the present application.

[0027] FIG. 12 is a top view of the structure shown in FIG. 11 .

[0028] FIG13 is a module block diagram of an electrical device in one embodiment of the present application.

[0029] Explanation of the accompanying reference numerals: 100-energy storage device; 110-casing; 112-main body; 114-top cover; 116-accommodation space; 120-battery module; 122-battery cell; 124-explosion-proof valve; 130 / 162-heat insulation board; 132-thinning area; 134-groove; 136-second limiting portion; 140-isolation plate; 141-pressure relief hole; 142-convex strip; 143-spacer bar; 144-wiring groove; 150-boss; 151-connecting end; 152-hollow end; 153-first part; 154-second part; 155-rib; 156-first limiting portion; 157-chamfer; 200-electrical equipment; 210-load. DETAILED DESCRIPTION

[0030] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0031] In the description of this 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 this 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 this application.

[0032] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0033] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0034] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this 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. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0035] 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 an intermediate 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 an intermediate element. 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 embodiment.

[0036] Please refer to Figures 1 and 2. Figure 1 shows a schematic structural diagram of an energy storage device in an embodiment of the present application, and Figure 2 shows an exploded view of the energy storage device in Figure 1 from one perspective. The energy storage device 100 provided in an embodiment of the present application includes a housing 110, a battery module 120, and a heat insulation plate 130. The heat insulation plate 130 is arranged between the top of the housing 110 and the battery module 120, which can effectively insulate and prevent the battery module 120 from overheating in a high temperature environment, thereby protecting the battery module 120, thereby improving the service life and safety of the energy storage device 100. It should be noted that the energy storage device 100 can be, but is not limited to, a battery pack, a battery system, an energy storage container, an energy storage cabinet, or other energy storage equipment. This application uses the energy storage device 100 being a battery pack as an example to illustrate the inventive concept of this application. It is exemplary and does not constitute a limitation.

[0037] In this embodiment, the housing 110 includes a main body 112 and a top cover 114, which covers the main body 112 to enclose a receiving space 116. Two battery modules 120 are arranged side by side in the receiving space 116 of the housing 110, wherein each battery module 120 is placed along the length of the housing 110. It is understood that in other embodiments, the housing 110 may include a top shell and a bottom plate, with the top shell covering the bottom plate to enclose a receiving space. In addition, the number of battery modules 120 is not limited to two and can be one or more than three according to actual needs. The side-by-side direction of the multiple battery modules 120 is not limited to the width direction of the housing 110.

[0038] Please refer to Figures 3 to 5, together with Figure 2. Figure 3 shows a decomposition diagram of the energy storage device in this embodiment from another perspective, Figure 4 shows a partial enlarged view of area A in Figure 2, and Figure 5 shows a structural schematic diagram of the isolation plate of the energy storage device in Figure 2. The battery module 120 includes a plurality of battery cells 122 and an isolation plate 140. The isolation plate 140 is arranged on the plurality of battery cells 122 and is provided with a plurality of pressure relief holes 141. The pressure relief holes 141 correspond to the explosion-proof valves of the battery cells 122. Among them, the heat insulation plate 130 is provided with a plurality of thinning areas 132, and the isolation plate 140 is provided with a plurality of bosses 150 protruding toward the heat insulation plate 130. The plurality of bosses 150 are correspondingly arranged between the plurality of pressure relief holes 141 and the plurality of thinning areas 132. The boss 150 is hollow and has a connecting end 151 and a hollow end 152 . The connecting end 151 is connected to the pressure relief hole 141 , and the hollow end 152 supports the thinning area 132 . The hollow end 152 is hollow.

[0039] By providing a plurality of thinning areas 132 on the heat insulation plate 130 and correspondingly providing a plurality of bosses 150 on the isolation plate 140, wherein the communication end 151 of the hollow boss 150 is connected to the pressure relief hole 141 and is provided corresponding to the explosion-proof valve, and the hollow end 152 of the boss 150 has a hollow portion and is provided corresponding to the thinning area 132, thereby forming a pressure relief channel between the thinning area 132 and the explosion-proof valve. When the explosion-proof valve is opened due to thermal runaway of the battery cell 122, high-temperature and high-pressure gas or liquid can break through the thinning area 132 through the pressure relief channel and enter the heat insulation plate 130 and the top of the box body 110 (top cover 114). The thinned area 132 of the heat insulating plate 130 is supported by the hollow end 152 of the boss 150, thereby preventing the high-temperature and high-pressure gas or liquid from splashing onto other battery cells 122 and damaging them, thereby improving the thermal safety of the energy storage device 100. Moreover, the thinned area 132 of the heat insulating plate 130 is supported by the hollow end 152 of the boss 150, thereby preventing the high-temperature and high-pressure gas or liquid from impacting the top cover 114 of the box body 110 and flowing back and reversely breaking through the thinned areas 132 at other positions, thereby avoiding the high-temperature and high-pressure gas or liquid from rushing toward other explosion-proof valves, significantly reducing the adverse effects caused by thermal runaway of a battery cell 122, and greatly improving the thermal safety of the energy storage device 100.

[0040] In this embodiment, the thinned regions 132 are formed by providing grooves 134, which are recessed in a direction away from the isolation plate 140, with the hollow ends 152 extending into the grooves 134. During assembly, the multiple thinned regions 132 of the heat insulation plate 130 are first aligned one-to-one with the multiple bosses 150. The heat insulation plate 130 is then placed on the bosses 150, with at least a portion of the hollow ends 152 of the bosses 150 located within the grooves 134. In this case, the grooves 134 serve to pre-position the heat insulation plate 130 and facilitate the engagement of the hollow ends 152 with the thinned regions 132. It should be noted that, in other embodiments, the groove 134 of the insulation plate 130 can be recessed in a direction away from the top cover 114 of the box body 110, and the hollow end 152 of the boss 150 is supported on the surface of the thinning area 132 facing away from the top cover 114, and cannot extend into the groove 134. At this time, the insulation plate 130 can be positioned and fixed by the structure on the box body 110.

[0041] In this embodiment, the boss 150 includes a first portion 153 and a second portion 154 that are interconnected. The connecting end 151 is the end of the first portion 153 distal to the second portion 154, and the hollow end 152 is the end of the second portion 154 distal to the first portion 153. The hollow end 152 converges toward the center relative to the other end of the second portion 154, causing the partial pressure relief channel formed on the second portion 154 to gradually decrease in the pressure relief direction. In other words, from an orthographic projection perspective, the orthographic projection area of ​​the hollow end 152 on the thermal insulation board 130 is surrounded by the orthographic projection area of ​​the other end of the second portion 154 on the thermal insulation board 130, and the hollow end 152 is spaced apart from the other end of the second portion 154.

[0042] Because the partial pressure relief channel formed by the second portion 154 tapers toward the thermal insulation board 130, it can guide and gather high-temperature, high-pressure gas or liquid, allowing it to better penetrate the thinned region 132 and more fully discharge into the space between the thermal insulation board 130 and the top cover 114. It should be noted that in other embodiments, the first portion 153 can employ the same or similar structure as the second portion 154, i.e., the partial pressure relief channel formed by the first portion 153 also tapers toward the thermal insulation board 130; alternatively, the entire boss 150 can employ the same or similar structure as the second portion 154, i.e., the entire pressure relief channel tapers toward the thermal insulation board 130.

[0043] Referring to Figures 6 to 9 , Figure 6 illustrates a schematic structural diagram of the battery module and thermal insulation board of the energy storage device in this embodiment. Figure 7 illustrates a side view of the structure shown in Figure 6 , Figure 8 illustrates a partial cross-sectional view of the structure shown in Figure 7 , and Figure 9 illustrates a partial enlarged view of region B in Figure 8 . The thickness t1 of thinned region 132 is less than half the thickness t2 of thermal insulation board 130 . Furthermore, the thickness t1 of thinned region 132 is less than one-quarter the thickness t2 of thermal insulation board 130 , making it more susceptible to being breached by high-temperature, high-pressure gas or liquid. In this embodiment, the thickness t1 of thinned region 132 may be, but is not limited to, 0.1 mm to 0.3 mm.

[0044] The sum of the height h of boss 150 and the depth d of pressure relief hole 141 is greater than half the maximum length l of explosion-proof valve 124, providing sufficient space for the explosion-proof membrane of explosion-proof valve 124 to rupture, ensuring the normal opening of explosion-proof valve 124 and allowing high-temperature, high-pressure gas or liquid to escape smoothly through explosion-proof valve 124 and into the pressure relief channel. In this embodiment, the sum of the height h of boss 150 and the depth d of pressure relief hole 141 is equal to 0.6 times the maximum length l of explosion-proof valve 124. Obviously, in other embodiments, the sum of the height h of boss 150 and the depth d of pressure relief hole 141 can be equal to 0.7 times, 0.8 times, or more of the maximum length l of explosion-proof valve 124.

[0045] 4 and 5 , the hollow end 152 is hollowed out, and a plurality of intersecting ribs 155 are formed on the hollow end 152. The plurality of ribs 155 can increase the support area and better support the thinning area 132, so that each portion of the thinning area 132 is evenly supported. The thickness t3 of the ribs 155 is 0.3 mm to 0.6 mm. Under the action of high-temperature, high-pressure gas or liquid, the ribs 155 can quickly melt, facilitate gas discharge, and absorb some of the heat from the high-temperature, high-pressure gas or liquid. However, the supporting function of the ribs 155 on the hollow ends 152 corresponding to other thinning areas 132 is not affected. It should be noted that the thickness t3 of the ribs 155 is the dimension in the thickness direction of the thermal insulation board 130.

[0046] In this embodiment, the thickness t3 of the rib 155 is 0.5 mm. In other embodiments, the thickness t3 of the rib 155 may also be 0.3 mm, 0.4 mm, or 0.6 mm.

[0047] Furthermore, multiple ribs 155 intersect to form a grid. The specific shape of the grid is not limited to the shape shown in the figure, as long as it is convenient for the discharge of high-temperature and high-pressure gas or liquid. In other words, the larger the gaps between the grids, the better without affecting the supporting effect.

[0048] It should be noted that boss 150 is arranged around pressure relief hole 141, which is arranged corresponding to explosion-proof valve 124. Specifically, the shapes of boss 150 and pressure relief hole 141 correspond to the shape of explosion-proof valve 124. In this embodiment, explosion-proof valve 124 is elliptical, while the periphery of hollow end 152 of boss 150 is runway-shaped. The multiple ribs 155 on hollow end 152 include two perpendicularly intersecting ribs 155 and a runway-shaped rib 155. The two perpendicularly intersecting ribs 155 are located at the center, the runway-shaped rib 155 is connected to the two perpendicularly intersecting ribs 155, and other ribs 155 are connected between the runway-shaped rib 155 and the periphery of hollow end 152. This arrangement of ribs 155 provides better support for various portions of thinned region 132 and facilitates the discharge of high-temperature, high-pressure gas or liquid from hollow end 152. It is understandable that in other embodiments, the explosion-proof valve 124 may be circular, square, or in other shapes, and the shapes of the boss 150 and the pressure relief hole 141 are adjusted accordingly.

[0049] 4 , the isolation plate 140 is further provided with protrusions 142 and spacer bars 143. All bosses 150 are located between two opposing protrusions 142, and each protrusion 142 forms a side wall of a wiring groove 144 on the isolation plate 140. Each spacer bar 143 is connected between two opposing protrusions 142 and is located between adjacent protrusions 150, thereby spacing adjacent protrusions 150. All protrusions 142 and all spacer bars 143 are supported on a side surface of the thermal insulation plate 130. In other words, from a height perspective, the height of the portion of the protrusion 150 that does not extend into the groove 134 is equal to the height of the protrusion 142, and the height of the protrusion 142 is equal to the height of the spacer bar 143. In other words, the height of the protrusion 142 or the spacer bar 143 is equal to the distance between the facing surfaces of the isolation plate 140 and the thermal insulation plate 130. It should be noted that the heights of the bosses 150 , the ridges 142 , and the spacer bars 143 are all based on the plate surface of the isolation plate 140 facing the heat insulation plate 130 .

[0050] On the basis of the hollow end 152 of the boss 150 supporting the thinning area 132, by setting the height of the part of the boss 150 that does not extend into the groove 134 to be equal to the height of the ridges 142 and the spacers 143, all the ridges 142 and all the spacers 143 are supported on the plate surface of the insulation board 130 facing the isolation board 140, that is, there is no gap between the top of the ridges 142 and the spacers 143 and the insulation board 130, thereby forming a plurality of independent spaces spaced from each other between the insulation board 130, all the ridges 142 and all the spacers 143, each boss 150 is located in an independent space, even if high-temperature and high-pressure gas or liquid diffuses into the independent space through the pressure relief channel, it will not spread to the wires in the wiring groove 144, and the independent space can further limit the diffusion of high-temperature and high-pressure gas or liquid.

[0051] In order to facilitate wiring, the protrusions 142 can be set in a disconnected manner rather than being continuous, and a spacer bar 143 can be set at the disconnection point of the two relatively set protrusions 142 to form a connecting groove (unnumbered). The connecting groove connects the wiring grooves 144 on both sides. The wires on the wiring groove 144 on one side can be routed to the wiring groove 144 on the other side through the connecting groove, making the arrangement of the wires more convenient.

[0052] In this embodiment, the heat insulation board 130 is a mica board, and the isolation board 140 is integrally injection-molded. The material thereof can be, but is not limited to, engineering plastic, and its fire resistance can be improved by adding flame retardants.

[0053] Referring to FIG. 10 , in conjunction with FIG. 4 , FIG. 10 shows a partial cross-sectional view of a battery module and thermal insulation plate of an energy storage device according to another embodiment of the present application. Compared to the aforementioned embodiment, the boss 150 of the isolation plate 140 of the energy storage device 100 has a different first portion 153 and second portion 154. The pressure relief channel formed by the boss 150 of the isolation plate 140 of the energy storage device 100 in this embodiment remains unchanged in size. The outer surface of the boss 150 is adapted or tightly fitted with the sidewalls of the groove 134, preventing a gap between the outer surface of the boss 150 and the sidewalls of the groove 134. This prevents high-temperature, high-pressure gas from diffusing through the gap between the two. Furthermore, the independent space formed between the thermal insulation plate 130, the boss 142, and the spacer bars 143 of the isolation plate 140 further prevents the diffusion of high-temperature, high-pressure gas, thereby forming a dual diffusion prevention structure.

[0054] Furthermore, a first stopper 156 is provided on the outer side of the boss 150, and a second stopper 136 is provided on the sidewall of the groove 134. The first stopper 156 and the second stopper 136 engage with each other in a concave-convex manner. When the first stopper 156 and the second stopper 136 engage with each other in a concave-convex manner, the hollow end 152 is precisely supported on the thinned area 132, thereby limiting the depth of the hollow end 152 inserted into the groove 134 and preventing the hollow end 152 from piercing the thinned area 132. At the same time, the provision of the first stopper 156 and the second stopper 136 can improve the connection stability between the boss 150 and the groove 134.

[0055] In this embodiment, the first limiting portion 156 is a raised ring, and the second limiting portion 136 is an annular groove. The raised ring snaps into the annular groove, thereby improving the sealing performance of the lateral fit between the boss 150 and the groove 134, and better preventing high-temperature and high-pressure gas or liquid from escaping from the lateral fit between the two. It should be noted that in other embodiments, the first limiting portion 156 can be a strip-shaped protrusion or a block-shaped protrusion, and the second limiting portion 136 can be an adapted groove; alternatively, the first limiting portion 156 can be an annular groove or a groove of other shapes, and the second limiting portion 136 can be a raised ring, a strip-shaped protrusion, or a block-shaped protrusion.

[0056] In this embodiment, the outer edge of the hollow end 152 is provided with a chamfer 157 to facilitate the installation and positioning of the heat shield 130. It is understood that in other embodiments, a chamfer may be used instead of the chamfer 157 to achieve the same installation and positioning effect; alternatively, a chamfer or a rounded shape may be provided on the inner edge of the groove 134 instead of the chamfer 157 or rounded shape on the hollow end 152. The angle of the chamfer 157 is preferably 75° to 85°.

[0057] As for other aspects of the energy storage device 100 in this embodiment, they are basically the same as those in the above embodiment. For details, please refer to the description of the above embodiment and will not be repeated here.

[0058] Referring to Figures 11 and 12 , Figure 11 illustrates a schematic diagram of the battery modules and thermal insulation board structure of an energy storage device according to another embodiment of the present application, while Figure 12 illustrates a top view of the structure shown in Figure 11 . In contrast to the thermal insulation board 130 of the energy storage device 100 in the aforementioned embodiment, which is mounted on at least two battery modules 120, the thermal insulation board 162 of the energy storage device 100 in this embodiment is mounted only on a single battery module 120. Specifically, each battery module 120 is provided with a corresponding thermal insulation board 162. The specific configuration of the thermal insulation board 162 is substantially the same as that of the thermal insulation board 130 in the aforementioned embodiment, differing only in size. During assembly, the thermal insulation board 162 is first mounted on each battery module 120, and then each battery module 120 and its thermal insulation board 162 are placed within the housing 110. This eliminates the need for additional thermal insulation boards 130 within the housing 110, simplifying assembly of the energy storage device 100 and improving assembly efficiency.

[0059] As for other aspects of the energy storage device 100 in this embodiment, they are basically the same as those in the above embodiment. For details, please refer to the description of the above embodiment and will not be repeated here.

[0060] Please refer to Figure 13, which shows a block diagram of an electrical device in accordance with an embodiment of the present application. The electrical device 200 provided in accordance with an embodiment of the present application includes an energy storage device 100 and a load 210. The load 210 is electrically connected to the energy storage device 100, and the energy storage device 100 provides electrical energy to the load 210. The specific structure of the energy storage device 100 is similar to that of the above-described embodiments. Since the electrical device 200 of this embodiment utilizes all the technical solutions of all the above-described embodiments, it also has all the beneficial effects brought about by the technical solutions of the above-described embodiments, which will not be further elaborated here.

[0061] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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.

[0062] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. An energy storage device, characterized in that: include: Box; A battery module, the battery module is arranged in the box, the battery module includes a plurality of battery cells and a separator, the separator is arranged on the plurality of battery cells and has a plurality of pressure relief holes, the pressure relief holes are arranged corresponding to the explosion-proof valves of the battery cells; as well as A heat insulation board, the heat insulation board is arranged between the top of the box and the battery module; Among them, the insulation board is provided with multiple thinning areas, and the isolation plate is provided with multiple bosses protruding toward the insulation board, and the multiple bosses are correspondingly arranged between the multiple pressure relief holes and the multiple thinning areas. The bosses are hollow and have a connecting end and a hollow end. The connecting end is connected to the pressure relief hole, and the hollow end supports the thinning area. The hollow end is hollow.

2. The energy storage device according to claim 1, characterized in that: The thinned area is formed by opening a groove, the groove is recessed in a direction away from the isolation plate, and the hollow end extends into the groove.

3. The energy storage device according to claim 2, characterized in that: The outer edge of the hollow end is chamfered or rounded.

4. The energy storage device according to claim 2, characterized in that: The boss includes a first part and a second part that are connected to each other, the connecting end is an end of the first part away from the second part, the hollow end is an end of the second part away from the first part, and the hollow end is gathered toward the center relative to the other end of the second part.

5. The energy storage device according to claim 2, characterized in that: The outer side surface of the boss is adapted or tightly matched with the side wall of the groove.

6. The energy storage device according to claim 5, characterized in that: A first limiting portion is disposed on the outer side surface of the boss, and a second limiting portion is disposed on the side wall of the groove. The first limiting portion and the second limiting portion are matched in a concave-convex manner.

7. The energy storage device according to any one of claims 1 to 6, characterized in that: A plurality of intersecting ribs are formed on the hollow end, and the thickness of the ribs is 0.3 mm to 0.6 mm.

8. The energy storage device according to any one of claims 1 to 6, characterized in that: The sum of the height of the boss and the depth of the pressure relief hole is greater than half of the maximum length of the explosion-proof valve.

9. The energy storage device according to any one of claims 2 to 6, characterized in that: The isolation plate is further provided with convex strips and spacer strips, all the convex platforms are located between two convex strips arranged opposite to each other, each convex strip forms a side groove wall of the wiring groove on the isolation plate, and each spacer strip is connected between two convex strips arranged opposite to each other and is located between adjacent convex platforms; All the convex strips and all the spacer strips are supported on one side surface of the heat insulation board; or, The height of the portion of the boss that does not extend into the groove is equal to the height of the convex strip, and the height of the convex strip is equal to the height of the spacer strip.

10. An electrical device, comprising an electrically connected load and an energy storage device, characterized in that: The energy storage device is the energy storage device according to any one of claims 1 to 9.

Images