Battery cover plate, battery and energy storage equipment

Abstract

The embodiment of the utility model provides a battery cover plate, a battery and energy storage equipment, relates to the technical field of batteries, and is used for solving the problem of excessive concentration of heat in the battery. The battery cover plate comprises a pole, a top cover, a heat-conducting insulating plate and a connecting piece, the top cover comprises a first hole, the first hole penetrates through the top cover in the thickness direction of the top cover, the pole penetrates through the first hole, and the connecting piece is electrically connected with the pole and the battery cell. The heat-conducting insulating plate is arranged between the top cover and the connecting piece, the two opposite faces of the heat-conducting insulating plate make contact with the top cover and the connecting piece respectively, and the melting point of the heat-conducting insulating plate is larger than that of the connecting piece. The heat of the connecting piece can be transmitted to the heat-conducting insulating plate and transmitted to the top cover through the heat-conducting insulating plate. Through the technical scheme of the invention, a heat dissipation link of the battery cover plate can be increased, heat is prevented from being concentrated at the connecting sheet to damage the internal structure of the battery, and the risk of battery failure is reduced.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to a battery cover, a battery, and an energy storage device. Background Technology

[0002] In a battery, a plastic component is placed between the connecting tabs and the top cover of the battery cover. This component isolates the positive and negative terminals, preventing internal short circuits. However, in practical applications, under abnormal conditions such as short circuits, the temperature of the battery's connecting tabs or terminals rises sharply. The heat concentrates on the battery cover, and the plastic component in direct contact with the connecting tabs or terminals may melt, potentially causing an internal short circuit and affecting the battery's normal operation and safety. Utility Model Content

[0003] This application provides a battery cover, a battery, and an energy storage device to improve the thermal conductivity of the battery cover and prevent excessive heat concentration inside the battery.

[0004] To achieve the above objectives, this application adopts the following technical solution:

[0005] A first aspect of this application provides a battery comprising a battery cell, a battery casing, and a battery cover. The battery cell is housed in the battery casing, and the battery cover is disposed on the battery casing. The battery cover includes terminals, a top cover, a thermally conductive insulating plate, and a connecting piece stacked thereon. The top cover includes a first hole extending through the top cover along its thickness direction, the terminals passing through the first hole, and the connecting piece electrically connecting the terminals and the battery cell.

[0006] The thermally conductive insulating plate is disposed between the top cover and the connecting piece, and the two opposite sides of the thermally conductive insulating plate are in contact with the top cover and the connecting piece respectively. The melting point of the thermally conductive insulating plate is greater than that of the connecting piece.

[0007] In the battery disclosed in this application, the battery cell is housed in a battery casing, and a battery cover is placed over the battery casing to encapsulate the battery casing. A connecting tab electrically connects the terminals and the battery cell, allowing current from the battery cell to be transmitted to the terminals via the connecting tab. The terminals pass through a first hole in the top cover, thus allowing current transmitted from the connecting tab to the terminals to be transmitted along the terminals to the outside of the battery for powering external devices.

[0008] The two opposing sides of the thermally conductive insulating plate are in contact with the top cover and the connecting piece, respectively. Heat generated by the connecting piece due to the Ohmic effect can be transferred to the thermally conductive insulating plate, and then to the top cover. This increases the heat dissipation pathway of the battery cover, preventing heat from concentrating at the connecting piece and damaging the internal battery structure, thus reducing the risk of battery failure.

[0009] Because the melting point of the thermally conductive insulating plate is higher than that of the connecting piece, under abnormal conditions such as a battery short circuit, the current increases sharply, and the temperature of the connecting piece rises sharply. When the temperature of the connecting piece is lower than its melting point, i.e., when the connecting piece has not melted, the heat from the connecting piece can be transferred to the top cover through the thermally conductive insulating plate, preventing excessive heat concentration inside the battery and damage to its internal structure. Furthermore, the thermally conductive insulating plate will not melt, ensuring the insulation performance between the connecting piece and the top cover, and reducing the risk of internal short circuit failure. Conversely, if the melting point of the thermally conductive insulating plate is lower than that of the connecting piece, when the temperature of the connecting piece exceeds the melting point of the thermally conductive insulating plate, the insulating plate will melt, easily leading to insulation failure between the top cover and the connecting piece, increasing the risk of battery failure. Therefore, the battery provided in this application can improve the thermal conductivity inside the battery cover, preventing excessive heat concentration inside the battery and causing internal short circuits, thus ensuring the normal operation and safety of the battery.

[0010] In one embodiment, the thermally conductive insulating plate includes a second hole that penetrates the thermally conductive insulating plate along its thickness direction, and an electrode post is disposed in the second hole, with the electrode post in contact with the inner wall of the second hole.

[0011] Current can be transferred from the connecting piece to the terminal, thus the terminal also generates heat. The terminal passes through a second hole in the thermally conductive insulating plate, and the terminal is in contact with the interior of the second hole. Therefore, the heat from the terminal can also be transferred to the thermally conductive insulating plate, and then further transferred to the top cover through the thermally conductive insulating plate, reducing the high temperature of the terminal and further improving the thermal conductivity of the battery cover.

[0012] In one embodiment, the projection of the connecting piece onto the surface of the thermally conductive insulating plate facing the connecting piece lies within the contour of the thermally conductive insulating plate.

[0013] This ensures that heat from different locations on the connecting piece can be transferred to the top cover through the thermally conductive insulating plate, preventing the connecting piece from coming into contact with other structures on the battery cover (such as structures with melting points lower than the thermally conductive insulating plate), and further reducing the risk of internal short-circuit failure of the battery.

[0014] In one embodiment, the battery cover further includes a plastic component disposed between the top cover and the connecting piece. The plastic component covers the battery casing to form a cell cavity, in which the cell is housed. A thermally conductive insulating plate is mounted on the plastic component. The melting point of the thermally conductive insulating plate is greater than that of the plastic component, and the thermal conductivity of the thermally conductive insulating plate is greater than that of the plastic component.

[0015] The plastic parts effectively isolate the battery cell from the top cover, preventing short circuits and electrolyte leakage. They also reduce malfunctions caused by poor cell contact or excessive compression, ensuring normal battery operation and improving battery safety.

[0016] In this example, the thermally conductive insulating plate is mounted on the plastic part, which enables the installation and fixation of the thermally conductive insulating plate to ensure the relative position of the thermally conductive insulating plate and the connecting piece, so that the thermally conductive insulating plate and the connecting piece are always in contact.

[0017] Because the thermal conductivity of the thermally conductive insulating plate is greater than that of the plastic parts, the heat from the connecting pieces tends to be transferred to the thermally conductive insulating plate. Furthermore, compared to the plastic parts, the thermally conductive insulating plate can transfer heat to the top cover more efficiently, improving the heat dissipation capacity of the battery cover and further preventing excessive heat concentration at the connecting pieces, thus ensuring the battery's operational reliability. In addition, the melting point of the thermally conductive insulating plate is higher than that of the plastic parts; compared to the plastic parts, the thermally conductive insulating plate is less prone to melting due to heat, thereby preventing thermal damage to the thermally conductive insulating parts caused by battery short circuits and reducing the possibility of internal battery failure.

[0018] In one embodiment, the plastic part includes a mounting groove, and a thermally conductive insulating plate is snapped into the mounting groove. The surface of the thermally conductive insulating plate facing away from the connecting piece is flush with the surface of the plastic part facing away from the connecting piece, and / or the surface of the thermally conductive insulating plate facing the connecting piece is flush with the surface of the plastic part facing the connecting piece.

[0019] By snapping the thermally conductive insulating plate into the mounting slot, it is easy to assemble the thermally conductive insulating plate onto the plastic part, reducing the assembly difficulty of the thermally conductive insulating plate onto the plastic part and improving assembly efficiency.

[0020] In some examples, the surface of the thermally conductive insulating plate facing away from the connecting piece is flush with the surface of the plastic part facing away from the connecting piece. This reduces the possibility of an increase in the thickness dimension of the battery cover due to the addition of the thermally conductive insulating plate, which is beneficial for the miniaturization of the battery cover and the battery.

[0021] In some examples, the surface of the thermally conductive insulating plate facing the connecting piece is flush with the surface of the plastic part facing the connecting piece, which can reduce the possibility of the battery cover increasing in thickness due to the addition of the thermally conductive insulating plate, thus facilitating the miniaturization of the battery cover and the battery.

[0022] In some examples, the surface of the thermally conductive insulating plate facing away from the connecting piece is flush with the surface of the plastic part facing away from the connecting piece, and the surface of the thermally conductive insulating plate facing the connecting piece is flush with the surface of the plastic part facing the connecting piece. In this way, after the thermally conductive insulating plate is installed onto the plastic part, the dimension of the plastic part in the thickness direction of the top cover remains unchanged, further reducing the possibility of an increase in the thickness direction of the battery cover due to the addition of the thermally conductive insulating plate, which is beneficial for the miniaturization of both the battery cover and the battery.

[0023] In one embodiment, the thermally conductive insulating plate is rectangular in shape.

[0024] This makes it easier to process and assemble the thermally conductive insulation board, reducing the processing and assembly costs, and also reducing the assembly difficulty.

[0025] In one embodiment, the shape of the thermally conductive insulating plate is consistent with the shape of the connecting piece.

[0026] In this way, during the manufacturing process, processing tools for connecting pieces, such as casting molds, can be used to process the thermally conductive insulation plate, reducing the design and processing costs of the thermally conductive insulation plate.

[0027] In addition, it can reduce the volume of the thermally conductive insulation board and lower material costs.

[0028] In one embodiment, a thermally conductive insulating plate is placed over the battery casing to form a cell cavity, and the cell is housed in the cell cavity.

[0029] The thermally conductive insulating plate effectively isolates the battery cell from the top cover, preventing short circuits and electrolyte leakage. It also reduces malfunctions caused by poor cell contact or excessive compression, ensuring normal battery operation and improving battery safety.

[0030] In addition, the thermally conductive insulating plate can transfer heat to the top cover more efficiently, thereby further improving the heat dissipation capacity of the battery cover and preventing excessive heat concentration at the connection points, thus ensuring the reliability of battery operation.

[0031] A second aspect of this application provides an energy storage device, which includes a cooling device and the aforementioned battery, wherein the cooling device is used to cool the battery.

[0032] Cooling devices are used to cool the battery, effectively reducing its temperature and the risk of thermal runaway, thereby ensuring the safe operation of the battery.

[0033] In addition, the energy storage device provided in this application includes the aforementioned battery. Therefore, the energy storage device provided in this application and the battery of the aforementioned technical solution can solve the same technical problem and have the same technical effect, which will not be repeated here.

[0034] A third aspect of this application provides a battery cover, which includes a terminal post and a top cover, a thermally conductive insulating plate, and a connecting piece stacked together. The top cover includes a first hole that penetrates the top cover along its thickness direction. The terminal post passes through the first hole. One end of the connecting piece is electrically connected to the terminal post, and the other end is used to electrically connect to the battery cell.

[0035] The thermally conductive insulating plate is disposed between the top cover and the connecting piece, and the two opposite sides of the thermally conductive insulating plate are in contact with the top cover and the connecting piece respectively. The melting point of the thermally conductive insulating plate is greater than that of the connecting piece.

[0036] In the battery cover provided in this application, a connecting piece is used to electrically connect the terminal and the battery cell, and the current from the battery cell can be transmitted to the terminal through the connecting piece. The terminal passes through the first hole in the top cover, so the current transmitted from the connecting piece to the terminal can be transmitted along the terminal to the outside of the battery for powering external devices.

[0037] The two opposing sides of the thermally conductive insulating plate are in contact with the top cover and the connecting piece, respectively. Heat generated by the connecting piece due to the Ohmic effect can be transferred to the thermally conductive insulating plate, and then to the top cover. This increases the heat dissipation pathway of the battery cover, preventing heat from concentrating at the connecting piece and damaging the battery cover and other internal structures, thus reducing the risk of battery failure.

[0038] Because the melting point of the thermally conductive insulating plate is higher than that of the connecting piece, in abnormal situations such as battery short circuits, the current increases sharply, causing the temperature of the connecting piece to rise rapidly. When the temperature of the connecting piece is lower than its melting point (i.e., when the connecting piece has not melted), the heat from the connecting piece can be transferred to the top cover through the thermally conductive insulating plate, preventing excessive heat concentration at the battery cover and thus preventing damage to the battery cover and other internal structures. Furthermore, the thermally conductive insulating plate will not melt, ensuring the insulation performance between the connecting piece and the top cover, and reducing the risk of internal short circuit failure. Conversely, if the melting point of the thermally conductive insulating plate is lower than that of the connecting piece, when the temperature of the connecting piece exceeds the melting point of the thermally conductive insulating plate, the insulating plate will melt, easily leading to insulation failure between the top cover and the connecting piece, increasing the risk of battery failure. Therefore, the solution provided in this application can improve the thermal conductivity of the battery cover, prevent excessive heat concentration inside the battery leading to internal short circuits, and ensure the normal operation and safety of the battery.

[0039] In one embodiment, the thermally conductive insulating plate includes a second hole that penetrates the thermally conductive insulating plate along its thickness direction, and an electrode post is disposed in the second hole, with the electrode post in contact with the inner wall of the second hole.

[0040] Current can be transferred from the connecting piece to the terminal, thus the terminal also generates heat. The terminal passes through a second hole in the thermally conductive insulating plate, and the terminal is in contact with the interior of the second hole. Therefore, the heat from the terminal can also be transferred to the thermally conductive insulating plate, and then further transferred to the top cover through the thermally conductive insulating plate, reducing the high temperature of the terminal and further improving the thermal conductivity of the battery cover.

[0041] In one embodiment, the projection of the connecting piece onto the surface of the thermally conductive insulating plate facing the connecting piece lies within the contour of the thermally conductive insulating plate.

[0042] This ensures that heat from different locations on the connecting piece can be transferred to the top cover through the thermally conductive insulating plate, preventing the connecting piece from coming into contact with other structures on the battery cover (such as structures with melting points lower than the thermally conductive insulating plate), and further reducing the risk of internal short-circuit failure of the battery.

[0043] In one embodiment, the battery cover further includes a plastic component disposed between the top cover and the connecting piece, the plastic component covering the battery housing to form a cell cavity, and the cell being housed in the cell cavity;

[0044] A thermally conductive insulating plate is installed on a plastic part. The melting point of the thermally conductive insulating plate is greater than that of the plastic part, and the thermal conductivity of the thermally conductive insulating plate is greater than that of the plastic part.

[0045] The plastic parts effectively isolate the battery cell from the top cover, preventing short circuits and electrolyte leakage. They also reduce malfunctions caused by poor cell contact or excessive compression, ensuring normal battery operation and improving battery safety.

[0046] In this example, the thermally conductive insulating plate is mounted on the plastic part, which enables the installation and fixation of the thermally conductive insulating plate to ensure the relative position of the thermally conductive insulating plate and the connecting piece, so that the thermally conductive insulating plate and the connecting piece are always in contact.

[0047] Because the thermal conductivity of the thermally conductive insulating plate is greater than that of the plastic parts, the heat from the connecting pieces tends to be transferred to the thermally conductive insulating plate. Furthermore, compared to the plastic parts, the thermally conductive insulating plate can transfer heat to the top cover more efficiently, improving the heat dissipation capacity of the battery cover and further preventing excessive heat concentration at the connecting pieces, thus ensuring the battery's operational reliability. In addition, the melting point of the thermally conductive insulating plate is higher than that of the plastic parts; compared to the plastic parts, the thermally conductive insulating plate is less prone to melting due to heat, thereby preventing thermal damage to the thermally conductive insulating parts caused by battery short circuits and reducing the possibility of internal battery failure.

[0048] In some embodiments, the plastic part includes a mounting groove, and a thermally conductive insulating plate is snapped into the mounting groove. The surface of the thermally conductive insulating plate facing away from the connecting piece is flush with the surface of the plastic part facing away from the connecting piece, and / or the surface of the thermally conductive insulating plate facing the connecting piece is flush with the surface of the plastic part facing the connecting piece.

[0049] By snapping the thermally conductive insulating plate into the mounting slot, it is easy to assemble the thermally conductive insulating plate onto the plastic part, reducing the assembly difficulty of the thermally conductive insulating plate onto the plastic part and improving assembly efficiency.

[0050] In some examples, the surface of the thermally conductive insulating plate facing away from the connecting piece is flush with the surface of the plastic part facing away from the connecting piece. This reduces the possibility of an increase in the thickness dimension of the battery cover due to the addition of the thermally conductive insulating plate, which is beneficial for the miniaturization of the battery cover and the battery.

[0051] In some examples, the surface of the thermally conductive insulating plate facing the connecting piece is flush with the surface of the plastic part facing the connecting piece, which can reduce the possibility of the battery cover increasing in thickness due to the addition of the thermally conductive insulating plate, thus facilitating the miniaturization of the battery cover and the battery.

[0052] In some examples, the surface of the thermally conductive insulating plate facing away from the connecting piece is flush with the surface of the plastic part facing away from the connecting piece, and the surface of the thermally conductive insulating plate facing the connecting piece is flush with the surface of the plastic part facing the connecting piece. In this way, after the thermally conductive insulating plate is installed onto the plastic part, the dimension of the plastic part in the thickness direction of the top cover remains unchanged, further reducing the possibility of an increase in the thickness direction of the battery cover due to the addition of the thermally conductive insulating plate, which is beneficial for the miniaturization of both the battery cover and the battery.

[0053] In one embodiment, the thermally conductive insulating plate is rectangular in shape.

[0054] This makes it easier to process and assemble the thermally conductive insulation board, reducing the processing and assembly costs, and also reducing the assembly difficulty.

[0055] In one embodiment, the shape of the thermally conductive insulating plate is consistent with the shape of the connecting piece.

[0056] In this way, during the manufacturing process, processing tools for connecting pieces, such as casting molds, can be used to process the thermally conductive insulation plate, reducing the design and processing costs of the thermally conductive insulation plate.

[0057] In addition, it can reduce the volume of the thermally conductive insulation board and lower material costs. Attached Figure Description

[0058] Figure 1 This is a schematic diagram of the structure of an energy storage device provided in an embodiment of this application;

[0059] Figure 2 This is a schematic diagram of the structure of a battery provided in an embodiment of this application;

[0060] Figure 3 for Figure 2 A partial exploded view of the battery;

[0061] Figure 4 This is one of the exploded views of a battery cover provided in an embodiment of this application;

[0062] Figure 5 for Figure 4 A schematic diagram of the partial assembly structure of the battery cover;

[0063] Figure 6 for Figure 4 Schematic diagram of the structure of the thermally conductive insulating plate;

[0064] Figure 7 for Figure 4 A partial structural diagram of the plastic parts;

[0065] Figure 8 for Figure 4A partial sectional view of the battery cover;

[0066] Figure 9 for Figure 5 A structural schematic diagram of the battery cover from another perspective;

[0067] Figure 10 This is a second exploded view of a battery cover provided in an embodiment of this application;

[0068] Figure 11 This is the third exploded view of a battery cover provided in an embodiment of this application.

[0069] Figure label:

[0070] 1000 - Energy storage device; 100 - Battery; 200 - Cooling device; 300 - Housing;

[0071] 10-Battery cover; 20-Battery casing; 201-Opening slot; 30-Battery cell; 301-Taper; 3011-Positive tab; 3012-Negative tab; 40-Cell cavity;

[0072] 1-Top cover; 11-First hole; 2-Heat-conducting insulating plate; 21-Second hole; 22-First heat-conducting insulating plate; 23-Second heat-conducting insulating plate; 24-First convex plate; 3-Connecting piece; 31-Positive electrode connecting piece; 32-Negative electrode connecting piece; 4-Electrical post; 41-Positive electrode post; 42-Negative electrode post; 5-Plastic part; 51-Mounting groove; 52-Second convex plate; 6-Fixing part; 7-Sealing ring; 8-Injection hole; 9-Explosion-proof plate. Detailed Implementation

[0073] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0074] In this application, unless otherwise expressly specified and limited, the terms "upper", "lower", "front", "back", "left", "right", etc., indicating orientation or positional relationship may be defined relative to the orientation of the components schematically placed in the accompanying drawings. These directional terms may be relative concepts, used for relative description and clarification, and may change accordingly depending on the orientation of the components in the accompanying drawings. They should not be construed as limitations on this application.

[0075] In this application, the terms "first," "second," etc., are used for descriptive purposes only to distinguish one element from another, and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0076] In this application, unless otherwise expressly stated and limited, "multiple" means two or more.

[0077] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, when describing pipelines or channels, the terms "connection" and "linkage" as used in this application have the meaning of establishing electrical conductivity. The specific meaning needs to be understood in conjunction with the context.

[0078] Furthermore, in this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or illustration. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0079] In the accompanying drawings of the embodiments of this application, solid structures such as parts and components are represented by guide lines; hollow structures such as openings, holes, spaces, and cavities are represented by guide lines with arrows.

[0080] This application provides an energy storage device for storing and releasing electrical energy. For example, the energy storage device can be connected to electrical equipment to supply power to the equipment. The energy storage device can be used in various scenarios, such as home energy storage, industrial energy storage, data centers, power plants, and vehicles. This application does not impose any special limitations on the specific application scenarios of the energy storage device.

[0081] Figure 1 A schematic diagram of an energy storage device is shown. (Refer to...) Figure 1 The energy storage device 1000 includes a battery 100 and a cooling device 200. The battery 100 is used to provide electrical energy to electrical devices. The cooling device 200 is used to cool the battery 100 to effectively reduce the temperature of the battery 100, reduce the risk of thermal runaway of the battery 100, and thus ensure the safe operation of the battery 100.

[0082] Reference Figure 1 The battery 100 includes terminals 4. When the battery 100 is in the installed state, terminals 4 are positioned at the top (e.g., ...). Figure 1 As shown in the upper part of the middle figure), the cooling device 200 is located below the battery 100 (as shown in the upper part of the middle figure). Figure 1 (As shown in the lower part of the middle figure). Utilizing the thermal conductivity of the battery's own casing, such as that of an aluminum casing, heat is rapidly transferred to the cooling device 200 to reduce the casing temperature of the battery 100. The reduced casing temperature of the battery 100 increases the temperature difference between the battery's interior and its casing, allowing heat from the battery's interior to be continuously transferred to the casing. The cooling device 200 then cools the casing, thereby lowering the internal temperature of the battery 100 and reducing the risk of thermal runaway.

[0083] In some embodiments, the cooling device 200 is a liquid cooling plate. The surface of the liquid cooling plate facing the battery 100 is in contact with the battery casing. Heat in the battery 100 is transferred to the liquid cooling plate along the temperature gradient direction to further suppress the temperature rise of the battery 100 during operation and ensure the operational reliability of the battery 100. The structure, working principle, and arrangement of the liquid cooling plate are well known to those skilled in the art and will not be described in detail here.

[0084] In other embodiments of this application, the cooling device 200 may also be disposed at other locations of the battery 100, such as the side wall of the battery 100. Furthermore, the structure of the cooling device 200 may vary, such as air cooling or direct cooling. This application does not impose specific restrictions on the specific location and structure of the cooling device 200, and those skilled in the art can make adaptive choices according to actual needs.

[0085] In some embodiments, refer to Figure 1 The energy storage device 1000 also includes a housing 300, with the battery 100 and cooling device 200 housed inside the housing 300. The housing 300 can reduce the impact of external factors (such as moisture, dust, and corrosive gases) on the battery 100 and cooling device 200, extend the service life of the battery 100 and cooling device 200, and ensure the operational reliability of the battery 100 and cooling device 200.

[0086] exist Figure 1 In the illustrated embodiment, battery 100 can be a rechargeable battery, meaning a battery that can be recharged after discharge to reactivate its active materials and continue to be used. Examples include lithium-ion batteries, lead-acid batteries, sodium batteries, magnesium batteries, aluminum batteries, or potassium batteries. The specific form of battery 100 can be selectively designed according to the application scenario. For example, in fuel-powered vehicles, lead-acid batteries can be used. In electric vehicles, lithium-ion batteries can be used. Furthermore, the battery can have various shapes, such as prismatic batteries or cylindrical batteries; this application does not impose specific limitations on the specific form of battery 100.

[0087] Figure 2 A schematic diagram of a battery structure is shown. Figure 3 It shows Figure 2 A partially exploded view of the battery. (Refer to...) Figure 2 and Figure 3 The battery 100 includes a battery cell 30, a battery casing 20, and a battery cover 10. The battery casing 20 has an opening slot 201, within which the battery cell 30 is housed. The battery cover 10 covers the battery casing 20, encapsulating the battery casing 20 into a sealed structure. The battery cover 10 covers the opening of the opening slot 201, forming a sealed battery cell cavity 40. The battery cell 30 is housed within the battery cell cavity 40.

[0088] Reference Figure 2 and Figure 3 The battery 100 includes terminals 4, and the cell 30 includes tabs 301. Terminals 4 and tabs 301 are electrically connected, and terminals 4 serve to conduct current. Specifically, one end of terminal 4 extends into the cell cavity 40 and is electrically connected to the tabs 301 of the cell 30, while the other end extends out of the battery 100. The portion of terminal 4 extending out of the battery 100 can be connected to an external device for power supply. In this way, current from the cell 30 can be transmitted to terminals 4 and then to external devices.

[0089] Reference Figure 3 The terminal 4 includes a positive terminal 41 and a negative terminal 42. The battery cell 30 includes a positive tab 3011 and a negative tab 3012. The positive terminal 41 and the positive tab 3011 are electrically connected, and the negative terminal 42 and the negative tab 3012 are electrically connected.

[0090] Figure 4 One exploded view of a battery cover is shown. (See reference) Figure 3 and Figure 4 The battery cover 10 includes a terminal post 4, a top cover 1, and a connecting piece 3. The top cover 1 includes a first hole 11 that extends through the top cover 1 along its thickness direction. The terminal post 4 passes through the first hole 11. One end of the connecting piece 3 is electrically connected to the terminal post 4, and the other end is used to electrically connect to the tab of the battery cell 30. The current from the battery cell 30 is transmitted to the connecting piece 3, and the current is transmitted along the connecting piece 3 to the terminal post 4, and then through the terminal post 4 to an external device.

[0091] The first hole 11 includes two holes, with the positive terminal 41 passing through one of them and the negative terminal 42 passing through the other. The connecting piece 3 includes a positive connecting piece 31 and a negative connecting piece 32. The positive connecting piece 31 is electrically connected to the positive terminal 41 and the positive tab 3011, and the negative connecting piece 32 is electrically connected to the negative terminal 42 and the negative tab 3012.

[0092] Reference Figure 4The battery cover 10 also includes a thermally conductive insulating plate 2, which comprises a first thermally conductive insulating plate 22 and a second thermally conductive insulating plate 23. The first thermally conductive insulating plate 22 is disposed between the top cover 1 and the positive electrode connecting piece 31, and the top cover 1, the first thermally conductive insulating plate 22, and the positive electrode connecting piece 31 are stacked along the thickness direction of the top cover 1. Through the first thermally conductive insulating plate 22, the top cover 1 and the positive electrode connecting piece 31 can be effectively electrically isolated, preventing short circuits in the battery or electric shocks to workers caused by electrical connection between the positive electrode connecting piece 31 and the top cover 1.

[0093] The second thermally conductive insulating plate 23 is disposed between the top cover 1 and the negative electrode connecting piece 32, and the top cover 1, the second thermally conductive insulating plate 23, and the negative electrode connecting piece 32 are stacked along the thickness direction of the top cover 1. The second thermally conductive insulating plate 23 can effectively electrically isolate the top cover 1 and the negative electrode connecting piece 32, preventing short circuits in the battery or electric shocks to workers caused by electrical connection between the negative electrode connecting piece 32 and the top cover 1.

[0094] In some embodiments, a first thermally conductive insulating plate 22 is disposed between the top cover 1 and the positive electrode connecting piece 31, with its two opposing sides in contact with the top cover 1 and the positive electrode connecting piece 31, respectively. Heat generated by the positive electrode connecting piece 31 due to the ohmic effect can be transferred to the first thermally conductive insulating plate 22 and then to the top cover 1. This increases the heat dissipation pathway of the battery cover 10, preventing heat from concentrating at the positive electrode connecting piece 31 and damaging the internal structure of the battery, thus reducing the risk of battery failure.

[0095] In this process, some of the heat from the top cover 1 can be exchanged with the external environment, while the rest can be transferred to other parts of the battery casing. This utilizes the thermal conductivity of the battery casing to increase the contact area between the battery and the external environment, improving the battery's heat dissipation efficiency and thus reducing the temperature of the top cover 1. As the temperature of the top cover 1 decreases, a temperature difference is created between the first thermally conductive insulating plate 22 and the top cover 1, allowing the heat from the first thermally conductive insulating plate 22 to be continuously transferred to the top cover 1. Similarly, a temperature difference is also created between the positive electrode connecting piece 31 and the first thermally conductive insulating plate 22, allowing the heat from the positive electrode connecting piece 31 to be continuously transferred to the first thermally conductive insulating plate 22 as well. Therefore, the first thermally conductive insulating plate 22 increases the thermal conductivity of the battery cover 10, preventing excessive heat concentration inside the battery and damage to the internal structure, thus ensuring the normal operation and safety of the battery.

[0096] To further reduce the temperature of the top cover 1, a cooling device 200 can be installed on the outside of the battery (e.g., Figure 1 The cooling device 200 shown is used to further cool the battery (including the top cover 1). The principle and configuration of the cooling device 200 for cooling the battery have been described above and will not be repeated here.

[0097] In some embodiments, the melting point of the first thermally conductive insulating plate 22 is greater than the melting point of the positive electrode connecting piece 31. In abnormal situations such as a battery short circuit, the current increases sharply, and the heat generated by the positive electrode connecting piece 31 also increases sharply. When the temperature of the positive electrode connecting piece 31 is lower than its melting point, i.e., when the positive electrode connecting piece 31 has not melted, on the one hand, the heat from the positive electrode connecting piece 31 can be transferred to the top cover 1 through the first thermally conductive insulating plate 22, preventing excessive heat concentration inside the battery and damage to its internal structure. On the other hand, the first thermally conductive insulating plate 22 will not melt due to the excessively high temperature of the positive electrode connecting piece 31, ensuring the insulation performance between the positive electrode connecting piece 31 and the top cover 1, and reducing the risk of internal short-circuit failure of the battery. Conversely, if the melting point of the first thermally conductive insulating plate 22 is lower than the melting point of the positive electrode connecting piece 31, when the temperature of the positive electrode connecting piece 31 is greater than the melting point of the first thermally conductive insulating plate 22, the first thermally conductive insulating plate 22 will melt due to heat, easily leading to insulation failure between the top cover 1 and the positive electrode connecting piece 31, increasing the risk of battery failure.

[0098] When the temperature of the positive electrode connector 31 is greater than or equal to the melting point of the positive electrode connector 31, the positive electrode connector 31 melts and the current will not continue to be transmitted. The temperature of the positive electrode connector 31 then decreases until it reaches room temperature.

[0099] Similarly, in some embodiments, a second thermally conductive insulating plate 23 is disposed between the top cover 1 and the negative electrode connecting piece 32, with the two opposing sides of the second thermally conductive insulating plate 23 in contact with the top cover 1 and the negative electrode connecting piece 32, respectively. The heat generated by the negative electrode connecting piece 32 due to the ohmic effect can be transferred to the second thermally conductive insulating plate 23 and then to the top cover 1. This increases the heat dissipation pathway of the battery cover 10, preventing heat from concentrating at the negative electrode connecting piece 32 and damaging the internal structure of the battery, thus reducing the risk of battery failure.

[0100] In this process, some of the heat from the top cover 1 can be exchanged with the external environment, while the rest can be transferred to other parts of the battery casing. This utilizes the thermal conductivity of the battery casing to increase the contact area between the battery and the external environment, improving the battery's heat dissipation efficiency and thus reducing the temperature of the top cover 1. As the temperature of the top cover 1 decreases, a temperature difference is created between the second thermally conductive insulating plate 23 and the top cover 1, allowing the heat from the second thermally conductive insulating plate 23 to be continuously transferred to the top cover 1. Similarly, a temperature difference is also created between the negative electrode connecting piece 32 and the second thermally conductive insulating plate 23, allowing the heat from the negative electrode connecting piece 32 to be continuously transferred to the second thermally conductive insulating plate 23. Therefore, the second thermally conductive insulating plate 23 increases the thermal conductivity of the battery cover 10, preventing excessive heat concentration inside the battery and damage to the internal structure, thus ensuring the normal operation and safety of the battery.

[0101] To further reduce the temperature of the top cover 1, a cooling device 200 can be installed on the outside of the battery (e.g., Figure 1 The cooling device 200 shown is used to further cool the battery (including the top cover 1). The principle and configuration of the cooling device 200 for cooling the battery have been described above and will not be repeated here.

[0102] In some embodiments, the melting point of the second thermally conductive insulating plate 23 is greater than the melting point of the negative electrode connecting piece 32. In abnormal situations such as a battery short circuit, the current increases sharply, and the heat generated by the negative electrode connecting piece 32 also increases. When the temperature of the negative electrode connecting piece 32 is lower than its melting point, i.e., when the negative electrode connecting piece 32 has not melted, on the one hand, the heat from the negative electrode connecting piece 32 can be transferred to the top cover 1 through the second thermally conductive insulating plate 23, preventing excessive heat concentration inside the battery and damage to its internal structure. On the other hand, the second thermally conductive insulating plate 23 will not melt due to excessively high temperatures of the negative electrode connecting piece 32, ensuring the insulation performance between the negative electrode connecting piece 32 and the top cover 1, and reducing the risk of internal short-circuit failure of the battery. Conversely, if the melting point of the second thermally conductive insulating plate 23 is lower than the melting point of the negative electrode connecting piece 32, when the temperature of the negative electrode connecting piece 32 is greater than the melting point of the second thermally conductive insulating plate 23, the second thermally conductive insulating plate 23 will melt due to heat, easily leading to insulation failure between the top cover 1 and the negative electrode connecting piece 32, increasing the risk of battery failure.

[0103] When the temperature of the negative electrode connector 32 is greater than or equal to the melting point of the negative electrode connector 32, the negative electrode connector 32 melts and the current will not continue to be transmitted. The temperature of the negative electrode connector 32 decreases. In this case, the temperature at the positive electrode connection will not damage the internal structure of the battery.

[0104] exist Figure 4 In the battery cover shown, the material of the thermally conductive insulating plate 2 can be selected according to actual needs. For example, in some embodiments, the thermally conductive insulating plate 2 is a thermally conductive insulating ceramic plate. The thermally conductive insulating ceramic plate has high insulation strength, ensuring its stability and safety under high pressure and high temperature conditions. It can be used to isolate and protect electronic components, preventing current leakage and short circuits. In addition, the thermally conductive insulating ceramic plate has high thermal conductivity and temperature resistance, effectively conducting and dissipating heat. Furthermore, it can operate for extended periods in high-temperature environments with higher stability. Alternatively, in other embodiments, the thermally conductive insulating plate 2 can be made of other materials, such as high thermal conductivity epoxy resin, high thermal conductivity silicone rubber, or high thermal conductivity silicone grease.

[0105] In some embodiments, the first thermally conductive insulating plate 22 and the second thermally conductive insulating plate 23 are made of the same material; for example, both the first thermally conductive insulating plate 22 and the second thermally conductive insulating plate 23 are thermally conductive insulating ceramic plates. In other embodiments, the first thermally conductive insulating plate 22 and the second thermally conductive insulating plate 23 are made of different materials; for example, the first thermally conductive insulating plate 22 is a thermally conductive insulating ceramic plate, and the second thermally conductive insulating plate 23 is a high thermal conductivity epoxy resin plate. This application does not impose specific limitations in this regard, and those skilled in the art can selectively design according to actual needs.

[0106] Reference Figure 4 The first thermally conductive insulating plate 22 includes a second hole 21, which penetrates the first thermally conductive insulating plate 22 along the thickness direction. The positive electrode post 41 passes through the second hole 21 of the first thermally conductive insulating plate 22 and is in contact with the inner wall of the second hole 21 of the first thermally conductive insulating plate 22.

[0107] Current can be transferred from the positive connector 3 to the positive terminal 41, so the positive terminal 41 will also generate heat. Since the positive terminal 41 passes through the second hole 21 of the first thermally conductive insulating plate 22 and is in contact with the inner wall of the second hole 21 of the first thermally conductive insulating plate 22, the heat of the positive terminal 41 can also be transferred to the first thermally conductive insulating plate 22, and then transferred to the top cover 1 through the first thermally conductive insulating plate 22, thereby reducing the high temperature of the positive terminal 41 and further improving the thermal conductivity of the battery cover 10.

[0108] Similarly, the second thermally conductive insulating plate 23 includes a second hole 21, which penetrates the second thermally conductive insulating plate 23 along the thickness direction. The negative electrode post 42 passes through the second hole 21 of the second thermally conductive insulating plate 23 and is in contact with the inner wall of the second hole 21 of the second thermally conductive insulating plate 23.

[0109] The heat from the negative electrode post 42 can be transferred to the second thermally conductive insulating plate 23, and then transferred to the top cover 1 through the second thermally conductive insulating plate 23, thereby reducing the short-circuit high temperature of the negative electrode post 42 and further improving the thermal conductivity of the battery cover 10.

[0110] In some embodiments, refer to Figure 3 and Figure 4 The top cover 1 is provided with an injection hole 8. After the battery cover plate 10 encapsulates the battery housing 20, electrolyte is injected into the cell cavity 40 through the injection hole 8.

[0111] In some embodiments, refer to Figure 4 The top cover 1 is also equipped with an explosion-proof plate 9 and an explosion-proof valve (not shown in the figure) to improve the safety performance of the battery. The structure and working principle of the explosion-proof plate 9 and the explosion-proof valve are well known to those skilled in the art, and will not be described in detail here.

[0112] Figure 5 It shows Figure 4 A partial assembly diagram of the battery cover. (Refer to...) Figure 3 , Figure 4 and Figure 5 The battery cover 10 also includes a plastic part 5, a portion of which is disposed between the top cover 1 and the connecting piece 3, and another portion is disposed between the connecting piece 3 and the battery housing 20. The plastic part 5 covers the battery housing 20 to form a cell cavity 40, and the cell 30 is housed in the cell cavity 40.

[0113] The plastic component 5 effectively isolates the battery cell 30 from the top cover 1, preventing short circuits and electrolyte leakage. It also reduces malfunctions caused by poor contact or excessive compression of the battery cell 30, ensuring normal battery operation and improving battery safety. The arrangement and working principle of the plastic component 5 are well-known to those skilled in the art and will not be elaborated upon here.

[0114] The first thermally conductive insulating plate 22 and the second thermally conductive insulating plate 23 are both installed on the plastic part 5, which can realize the installation and fixation of the first thermally conductive insulating plate 22 and the second thermally conductive insulating plate 23, so as to ensure the relative position of the first thermally conductive insulating plate 22 and the positive electrode connecting piece 31 and the relative position of the second thermally conductive insulating plate 23 and the negative electrode connecting piece 32, so that the first thermally conductive insulating plate 22 and the positive electrode connecting piece 31 are always in contact, and the second thermally conductive insulating plate 23 and the negative electrode connecting piece 32 are always in contact.

[0115] In some embodiments, the thermal conductivity of the first thermally conductive insulating plate 22 and the thermal conductivity of the second thermally conductive insulating plate 23 are both greater than the thermal conductivity of the plastic part 5. The heat from the connecting piece 3 tends to be transferred to the first thermally conductive insulating plate 22 and the second thermally conductive insulating plate 23, and compared with the plastic part 5, the first thermally conductive insulating plate 22 and the second thermally conductive insulating plate 23 can transfer heat to the top cover 1 more efficiently, thereby improving the heat dissipation capacity of the battery cover 10, further preventing excessive heat concentration at the connecting piece 3, and ensuring the operational reliability of the battery.

[0116] In some embodiments, the melting point of the first thermally conductive insulating plate 22 and the melting point of the second thermally conductive insulating plate 23 are both greater than the melting point of the plastic part 5. Compared with the plastic part 5, the first thermally conductive insulating plate 22 and the second thermally conductive insulating plate 23 are less susceptible to thermal melting, thereby preventing the first thermally conductive insulating plate 22 from being thermally damaged due to a short circuit in the battery 100, and preventing the second thermally conductive insulating plate 23 from being thermally damaged due to a short circuit in the battery, thus reducing the possibility of internal battery failure.

[0117] Reference Figure 4 and Figure 5The plastic part 5 includes two mounting slots 51. A first thermally conductive insulating plate 22 is snapped into one of the mounting slots (hereinafter referred to as the first mounting slot for ease of description), and a second thermally conductive insulating plate 23 is snapped into the other mounting slot (hereinafter referred to as the second mounting slot for ease of description).

[0118] The first thermally conductive insulating plate 22 is snapped into the first mounting groove, facilitating its assembly onto the plastic part 5, reducing the assembly difficulty of the first thermally conductive insulating plate 22 onto the plastic part 5, and improving assembly efficiency. Similarly, the second thermally conductive insulating plate 23 is snapped into the second mounting groove, facilitating its assembly onto the plastic part 5, reducing the assembly difficulty of the second thermally conductive insulating plate 23 onto the plastic part 5, and improving assembly efficiency.

[0119] Reference Figure 4 and Figure 5 The positive terminal 41 and the negative terminal 42 are respectively fixed in the corresponding first hole 11 by a fastener 6.

[0120] To ensure insulation between the pole post 4 and the top cover 1, the fixing member 6 can be made of an insulating material, such as polyphenylene sulfide (PPS), which has good heat resistance, flame retardancy, and insulation properties. The fixing member 6 is disposed between the pole post 4 and the hole wall of the first hole 11 to prevent the pole post 4 from contacting the cover plate or other structures and causing a short circuit.

[0121] Reference Figure 4 and Figure 5 The battery cover 10 also includes a sealing ring 7, such as a metal ring. The fixing member 6 is sleeved on the outer periphery of the terminal post 4, and the sealing ring 7 is sleeved on the outer periphery of the fixing member 6. The sealing member can prevent the electrolyte inside the battery from flowing out from the gap between the terminal post 4 and the top cover 1, and prevent moisture, dust or other contaminants in the external environment from entering the battery.

[0122] Figure 6 It shows Figure 4 A schematic diagram of the thermally conductive insulating plate in the diagram. (Refer to...) Figure 6 The outer periphery of the thermally conductive insulating plate 2 includes a first protruding plate 24.

[0123] Reference Figure 5 and Figure 6 The surface of the thermally conductive insulating plate 2 facing away from the connecting piece 3 is surface A, and the surface of the thermally conductive insulating plate 2 facing the connecting piece 3 is surface B. The first protruding plate 24 is closer to surface B than surface A.

[0124] exist Figure 5 and Figure 6In the embodiment shown, the first thermally conductive insulating plate 22 and the second thermally conductive insulating plate 23 are both rectangular. This arrangement simplifies the structure of the thermally conductive insulating plate, making it easy to process and assemble, reducing processing and assembly costs, and also reducing assembly difficulty.

[0125] Figure 7 for Figure 4 A partial structural diagram of the plastic component. (Refer to...) Figure 7 The inner wall of the mounting groove 51 is provided with a second protruding plate 52.

[0126] Reference Figure 5 and Figure 7 The surface of the plastic part 5 facing the top cover 1 is surface C, and the surface of the plastic part 5 away from the top cover 1 is surface D. The second protruding plate 52 is closer to surface C than surface D.

[0127] Figure 8 for Figure 4 A partial sectional view of the battery cover. (Refer to...) Figure 5 and Figure 8 The second protruding plate 52 is closer to the top cover 1 than the first protruding plate 24. Along the thickness direction of the top cover 1, the first protruding plate 24 and the second protruding plate 52 abut against each other.

[0128] Reference Figure 8 The diagram shows a plastic part 5, a positive electrode post 41, a positive electrode connecting piece 31, and a first thermally conductive insulating plate 22. The first thermally conductive insulating plate 22 is installed in a first mounting groove. The positive electrode post 41 passes through a second hole 21 in the first thermally conductive insulating plate 22. After the positive electrode post 41 and the positive electrode connecting piece 31 are connected, the positive electrode connecting piece 31 can press the first thermally conductive insulating plate 22 against the plastic part 5, ensuring that the first protrusion 24 of the first thermally conductive insulating plate 22 always abuts against the second protrusion 52, thereby ensuring the installation and fixation of the first thermally conductive insulating plate 22. The installation method of the second thermally conductive insulating plate 23 on the plastic part 5 is the same as that of the first thermally conductive insulating plate 22 on the plastic part 5, and will not be described again here.

[0129] In other embodiments of this application, the first thermally conductive insulating plate 22 and the second thermally conductive insulating plate 23 can also be installed in the mounting groove 51 in any suitable manner, such as by bonding. This application does not impose specific limitations on the connection method between the first thermally conductive insulating plate 22 and the first mounting groove, or the connection method between the second thermally conductive insulating plate 23 and the second mounting groove. Those skilled in the art can selectively design according to actual needs.

[0130] Reference Figure 8The A surface of the first thermally conductive insulating plate 22 is flush with the C surface of the plastic part 5, and the B surface of the first thermally conductive insulating plate 22 is flush with the D surface of the plastic part 5. In this way, after the first thermally conductive insulating plate 22 is installed on the plastic part 5, the dimension of the plastic part 5 in the thickness direction remains unchanged, further reducing the possibility that the dimension of the battery cover 10 in the thickness direction will increase due to the addition of the first thermally conductive insulating plate 22, which is beneficial to the miniaturization of the battery cover 10 and the battery.

[0131] Similarly, surface A of the second thermally conductive insulating plate 23 is flush with surface D of the plastic part 5, and surface B of the second thermally conductive insulating plate 23 is flush with surface D of the plastic part 5. In this way, after the second thermally conductive insulating plate 23 is installed onto the plastic part 5, the dimension of the plastic part 5 in the thickness direction remains unchanged, further reducing the possibility of an increase in the dimension of the battery cover 10 in the thickness direction due to the addition of the second thermally conductive insulating plate 23, which is beneficial for the miniaturization of the battery cover 10 and the battery.

[0132] Figure 9 for Figure 5 A structural schematic diagram of the battery cover from another perspective. (Refer to...) Figure 9 The positive electrode connecting piece 31 is on the B surface of the first thermally conductive insulating plate 22 (e.g., Figure 8 The projection on the positive electrode connector 31 (as shown) is located within the outline of the first thermally conductive insulating plate 22. This ensures that heat from different locations on the positive electrode connector 31 can be transferred to the top cover 1 through the first thermally conductive insulating plate 22, preventing the positive electrode connector 31 from contacting the plastic part 5 and causing the plastic part 5 to melt due to heat, further reducing the risk of internal short circuit failure of the battery.

[0133] Similarly, refer to Figure 9 The negative electrode connecting piece 32 is on the B surface of the second thermally conductive insulating plate 23 (e.g. Figure 8 The projection on the screen (as shown) lies within the outline of the second thermally conductive insulating plate 23. This ensures that heat from different locations on the negative electrode connecting piece 32 can be transferred to the top cover 1 through the second thermally conductive insulating plate 23, preventing the negative electrode connecting piece 32 from contacting the plastic part 5 and causing the plastic part 5 to melt due to heat, further reducing the risk of internal short circuit failure of the battery.

[0134] Figure 10 This is the second exploded view of a battery cover. (See reference...) Figure 10 The shape of the first thermally conductive insulating plate 22 is the same as the shape of the positive electrode connecting piece 31. The shape of the second thermally conductive insulating plate 23 is the same as the shape of the negative electrode connecting piece 32.

[0135] In this way, during the manufacturing process of the first thermally conductive insulating plate 22, the processing tools of the positive electrode connecting piece 31, such as casting molds, can be used to process the first thermally conductive insulating plate 22, reducing the design and processing costs of the first thermally conductive insulating plate 22. In addition, it can also reduce the volume of the first thermally conductive insulating plate 22 and lower material costs.

[0136] Similarly, during the manufacturing process of the second thermally conductive insulating plate 23, processing tools such as casting molds for the negative electrode connecting piece 32 can be used to process the second thermally conductive insulating plate 23, reducing the design and processing costs of the second thermally conductive insulating plate 23. Furthermore, it can also reduce the volume of the second thermally conductive insulating plate 23 and lower material costs.

[0137] In some embodiments, the negative electrode connecting piece 32 has the same shape as the positive electrode connecting piece 31, so the shape of the first thermally conductive insulating plate 22 is the same as the shape of the second thermally conductive insulating plate. This further reduces the design and manufacturing costs of the thermally conductive insulating plate 2.

[0138] In other embodiments, the shape of the first thermally conductive insulating plate 22 may also be different from the shape of the second thermally conductive insulating plate 23. This application does not impose specific limitations on this, and those skilled in the art can selectively design according to actual needs.

[0139] In this example, apart from the shape of the thermally conductive insulating plate 2, the other arrangements of the thermally conductive insulating plate 2 are the same as those of the other examples. Figure 4 The thermally conductive insulating plate 2 shown is installed in the same way as described above, and will not be repeated here.

[0140] Figure 11 An exploded view of a battery cover 10 is shown as part three. (Refer to...) Figure 2 , Figure 3 and Figure 11 A thermally conductive insulating plate 2 is placed over the battery casing 20 to form a cell cavity 40, in which the cell 30 is housed. The thermally conductive insulating plate 2 effectively isolates the cell 30 from the top cover 1, preventing short circuits and electrolyte leakage. It also reduces the occurrence of malfunctions caused by poor contact or excessive compression of the cell 30, ensuring the normal operation of the battery 100 and improving its safety performance.

[0141] The cell cavity 40 is formed by covering the battery casing 20 with a thermally conductive insulating plate 2. This can be understood as replacing the traditional battery cell cavity 40 with a thermally conductive insulating plate 2. Figure 4The plastic part 5 shown reduces assembly steps and improves assembly efficiency. It also increases the thermal conductivity and insulation of the battery cover 10. Furthermore, since the thermal conductivity of the thermally conductive insulating plate 2 is higher than that of the plastic part 5, heat can be transferred to the top cover 1 more efficiently through the thermally conductive insulating plate 2, further improving the heat dissipation capacity of the battery cover 10 and preventing excessive heat concentration at the connecting piece 3, thus ensuring the operational reliability of the battery 100.

[0142] exist Figure 10 The battery cover 10 shown and Figure 11 In the battery cover 10 shown, the thermally conductive insulating plate 2 can be made of various materials. For example, the thermally conductive insulating plate 2 can be a thermally conductive insulating ceramic plate. Thermally conductive insulating ceramic plates have high insulation strength, ensuring their stability and safety under high pressure and high temperature conditions. They can be used to isolate and protect electronic components, preventing current leakage and short circuits. Furthermore, thermally conductive insulating ceramic plates have high thermal conductivity and temperature resistance, effectively conducting and dissipating heat. They can also operate for extended periods in high-temperature environments with higher stability.

[0143] In other embodiments of this application, the thermally conductive insulating plate 2 may also be made of other materials, such as high thermal conductivity epoxy resin, high thermal conductivity silicone rubber, high thermal conductivity silicone grease, etc. This application does not make specific limitations on this, and those skilled in the art can selectively design according to actual needs.

[0144] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A battery, characterized by, The battery cover plate comprises a pole, a top cover, a heat-conducting insulation plate and a connecting piece which are stacked. The top cover comprises a first hole penetrating the top cover along the thickness direction of the top cover, and the pole is arranged in the first hole. The heat-conducting insulation plate is arranged between the top cover and the connecting piece, and the opposite surfaces of the heat-conducting insulation plate are in contact with the top cover and the connecting piece respectively.

2. The battery of claim 1, wherein, The heat-conducting insulation plate comprises a second hole penetrating the heat-conducting insulation plate along the thickness direction of the heat-conducting insulation plate, and the pole is arranged in the second hole.

3. The battery according to claim 1 or 2, characterized in that, The projection of the connecting piece on the surface of the heat-conducting insulation plate facing the connecting piece is located within the contour of the heat-conducting insulation plate.

4. The battery according to any one of claims 1 to 3, characterized in that, The battery cover plate further comprises a plastic part arranged between the top cover and the connecting piece. The heat-conducting insulation plate is mounted on the plastic part, and the melting point of the heat-conducting insulation plate is higher than that of the plastic part.

5. The battery of claim 4, wherein, The plastic part comprises a mounting groove, and the heat-conducting insulation plate is clamped in the mounting groove. The surface of the heat-conducting insulation plate away from the connecting piece is flush with the surface of the plastic part away from the connecting piece, and / or the surface of the heat-conducting insulation plate facing the connecting piece is flush with the surface of the plastic part facing the connecting piece.

6. The battery according to claim 4 or 5, characterized in that, The heat-conducting insulation plate has a rectangular shape.

7. The battery according to claim 4 or 5, characterized in that, The heat-conducting insulation plate has a shape consistent with that of the connecting piece.

8. The battery of any one of claims 1-3, wherein, The heat-conducting insulation plate covers the battery shell to form a battery cavity, and the battery is arranged in the battery cavity.

9. An energy storage device, characterized by, The battery further comprises a cooling device for cooling the battery.

10. A battery cover plate characterized by, The battery cover plate comprises a pole, a top cover, a heat-conducting insulation plate and a connecting piece which are stacked. The top cover comprises a first hole penetrating the top cover along the thickness direction of the top cover, and the pole is arranged in the first hole. The heat-conducting insulation plate is arranged between the top cover and the connecting piece, and the opposite surfaces of the heat-conducting insulation plate are in contact with the top cover and the connecting piece respectively.

11. The battery cover plate of claim 10, wherein, The heat-conducting insulation plate comprises a second hole penetrating the heat-conducting insulation plate along the thickness direction of the heat-conducting insulation plate, and the pole is arranged in the second hole.

12. The battery cover plate of claim 10 or 11, wherein, The projection of the connecting piece on the surface of the heat-conducting insulation plate facing the connecting piece is located within the contour of the heat-conducting insulation plate.

13. The battery cover plate of any one of claims 10-12, wherein, The battery cover plate further comprises a plastic part, which is arranged between the top cover and the connecting piece, and covers the battery shell to form a battery cell cavity, in which the battery cell is accommodated. The heat-conducting insulation plate is installed on the plastic part, and has a melting point greater than that of the plastic part and a thermal conductivity greater than that of the plastic part.

14. The battery cover plate of claim 13, wherein, The heat-conducting insulation plate is rectangular in shape.

15. The battery cover plate of claim 13, wherein, The heat-conducting insulation plate is rectangular in shape. The heat-conducting insulation plate is rectangular in shape.

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