Battery protection device and energy storage system

Abstract

The utility model discloses a battery protection device and an energy storage system, the battery protection device comprises a protection plate, at least one side surface of the protection plate along a first direction is provided with an electronic component; the heat dissipation plate is arranged on the side, where the electronic element is located, of the protection plate, a heat dissipation structure is arranged on the heat dissipation plate, and the heat dissipation structure comprises at least one heat conduction protruding part protruding towards the electronic element; and the heat-conducting glue is at least filled between the heat-conducting convex part and the electronic element. According to the battery protection device disclosed by the utility model, the heat dissipation plate is arranged on one side of the protection plate, the heat dissipation structure is arranged on the heat dissipation plate, and the heat conduction convex part of the heat dissipation structure is connected with the electronic element on the protection plate through the heat dissipation glue, so that the heat dissipation area of the electronic element is enlarged, the heat dissipation efficiency of the electronic element is improved, and the service life of the battery is prolonged.

Description

Technical Field

[0001] The present invention relates to the field of battery protection equipment, and in particular to a battery protection device and an energy storage system. Background Art

[0002] As an important energy supply device, batteries are widely used in various equipment.

[0003] High energy density batteries are generally equipped with battery protection boards, which are equipped with battery protection components. When the battery is working for a long time, it will generate a lot of heat, especially the protection board. Some high-power components on the protection board generate a lot of heat, and the heat diffusion effect is very obvious. If the heat cannot be dissipated in time and effectively, it will cause the battery to overheat, reduce the battery life and performance, and even cause safety hazards. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a battery protection device and energy storage system, by arranging a heat dissipation plate on one side of the protection plate, arranging a heat dissipation structure on the heat dissipation plate, and connecting the heat conductive convex part of the heat dissipation structure to the electronic components on the protection plate through heat dissipation glue, thereby expanding the heat dissipation area of ​​the electronic components, improving the heat dissipation efficiency of the electronic components, and extending the service life of the battery.

[0005] The first aspect of the utility model provides a battery protection device, comprising: a protection plate, wherein an electronic component is arranged on at least one side surface of the protection plate along a first direction; a heat dissipation plate, wherein the heat dissipation plate is arranged on the side of the protection plate where the electronic component is located, and wherein a heat dissipation structure is arranged on the heat dissipation plate, wherein the heat dissipation structure comprises at least one heat-conducting protrusion protruding toward the electronic component; and a heat-conducting adhesive, wherein the heat-conducting adhesive is at least filled between the heat-conducting protrusion and the electronic component.

[0006] The heat-conducting protrusion is connected to the electronic component through thermal conductive adhesive. When the battery works for a long time, the electronic components on the protection board work for a long time, and the dissipated heat is conducted to the heat-conducting protrusion through the thermal conductive adhesive, thereby expanding the heat dissipation area of ​​the electronic component. The heat can be dissipated into the environment from the electronic component and the thermal conductive protrusion at the same time, thereby improving the heat dissipation efficiency and extending the battery life.

[0007] In some embodiments, the projection of the electronic component in the reference plane is located within the projection of the thermally conductive protrusion in the reference plane, and the reference plane is perpendicular to the first direction; and / or the thermally conductive adhesive covers the electronic component.

[0008] In some embodiments, a plurality of arrangement areas are provided on the protective plate, each of the arrangement areas is provided with the electronic component, a plurality of the thermal conductive protrusions correspond one-to-one to the arrangement areas, and each of the thermal conductive protrusions is opposite to the corresponding arrangement area so as to be in heat dissipation contact with the electronic component in the corresponding arrangement area.

[0009] In some embodiments, the heat sink includes a first surface and a second surface opposite to each other along the first direction, the first surface faces the electronic component, the thermal conductive protrusion is formed by the second surface protruding toward the first surface, and a groove adapted to the shape of the thermal conductive protrusion is formed on one side of the second surface.

[0010] According to some embodiments of the present invention, an outer contour shape of a projection of the heat-conducting protrusion on the reference plane matches an outer contour shape of a projection of the electronic component on the reference plane.

[0011] According to some embodiments of the present invention, a plurality of heat sinks are disposed on the second surface, and the plurality of heat sinks are parallel to each other and arranged at intervals.

[0012] According to some embodiments of the utility model, the heat dissipation element includes fence bars, and in the thickness direction of the protective plate, the height H of the fence bars satisfies: H≤2.25mm; and / or, the thickness T of the fence bars satisfies: T≤0.9mm; and / or, the spacing S between the fence bars and the thickness T of the fence bars satisfy: 1.5≤S / T≤3.

[0013] In some embodiments, the protection plate is provided with a first connection hole, the heat dissipation plate is provided with a second connection hole, and the first connection hole and the second connection hole are arranged opposite to each other.

[0014] The battery protection device further includes a fastener, and the protection plate and the heat dissipation plate are connected by the fastener passing through the first connection hole and the second connection hole in sequence.

[0015] According to some embodiments of the utility model, a connecting column is provided on the heat sink, the connecting column defines the second connecting hole, one end of the connecting column away from the heat sink abuts against the protective plate, and at least part of the connecting column is connected to the thermal conductive protrusion.

[0016] The second aspect of the utility model further provides an energy storage system, comprising: an energy storage battery; the above-mentioned battery protection device, wherein the protection plate is electrically connected to the energy storage battery.

[0017] The energy storage system of the utility model uses the above-mentioned battery protection device, thereby improving the heat dissipation efficiency of electronic components and extending the service life of the energy storage system.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 It is a structural schematic diagram of a battery protection device of an embodiment of the utility model;

[0021] Figure 2 It is a schematic diagram of the explosion structure of the battery protection device of the utility model embodiment;

[0022] Figure 3 It is a schematic structural diagram of a surface on one side of a protective plate provided with electronic components in an embodiment of the utility model;

[0023] Figure 4 It is a schematic structural diagram of the protection area on the protection plate of the utility model embodiment;

[0024] Figure 5 is a schematic structural diagram of a first surface of a heat sink of an embodiment of the utility model;

[0025] Figure 6 is a schematic structural diagram of the second surface of the heat dissipation plate of an embodiment of the utility model;

[0026] Reference numerals:

[0027] 1-Battery protection device;

[0028] 10-protection plate; 11-electronic component; 12a-first arrangement area; 12b-second arrangement area; 12c-third arrangement area; 13-first connection hole;

[0029] 20-heat sink; 21-heat-conducting protrusion; 21a-first heat-conducting protrusion; 21b-second heat-conducting protrusion; 21c-third heat-conducting protrusion; 22-groove; 23-heat sink; 24-second connection hole; 25-connection column;

[0030] 30-Fasteners. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] As an important energy supply device, batteries are widely used in various equipment.

[0033] High energy density batteries are generally equipped with battery protection boards, which are equipped with battery protection components. When the battery is working for a long time, it will generate a lot of heat, especially the protection board. Some high-power components on the protection board generate a lot of heat, and the heat diffusion effect is very obvious. If the heat cannot be dissipated in time and effectively, it will cause the battery to overheat, reduce the battery life and performance, and even cause safety hazards.

[0034] In view of this, the utility model proposes a battery protection device and energy storage system, by arranging a heat sink on one side of the protection plate, arranging a heat dissipation structure on the heat sink, and connecting the heat conductive protrusion of the heat dissipation structure to the electronic components on the protection plate through heat dissipation adhesive, thereby expanding the heat dissipation area of ​​the electronic components, improving the heat dissipation efficiency of the electronic components, and extending the service life of the battery.

[0035] In the description of the present invention, it should be understood that 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" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0036] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0037] In the description of the present invention, "plurality" means two or more.

[0038] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact but are in contact with each other via another feature therebetween.

[0039] In the description of the present invention, a first feature “above”, “over” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0040] Reference below Figure 1-Figure 6 A battery protection device according to an embodiment of the first aspect of the utility model is described.

[0041] like Figures 1 to 4 As shown, a battery protection device 1 may include: a protection plate 10, a heat sink 20 and a thermally conductive adhesive. An electronic component 11 is disposed on at least one side of the protection plate 10 along a first direction, the heat sink 20 is disposed on the side of the protection plate 10 where the electronic component 11 is located, a heat dissipation structure is disposed on the heat sink 20, and the heat dissipation structure includes at least one thermally conductive protrusion 21 protruding toward the electronic component 11, and the thermally conductive adhesive may be a thermoplastic colloid, and the thermally conductive adhesive has a good thermal conductivity, and the thermally conductive adhesive is at least filled between the thermally conductive protrusion 21 and the electronic component 11.

[0042] The protection board 10 may be an electronic circuit board for monitoring and protecting a battery (especially a rechargeable battery, such as a lithium-ion battery) from damage. Generally, the electronic component 11 provided on the protection board 10 is electrically connected to the battery through the circuit on the protection board 10, and plays a role in regulating the current output of the battery, improving the safety of the battery during use, and extending the service life of the battery. For example, the electronic component 11 may include, but is not limited to: a precision resistor, a semiconductor transistor, or a fuse.

[0043] For the convenience of description, in the description of the present utility model, the first direction may be parallel to the thickness direction of the protective plate. For example, the first direction may be Figure 1 The X direction in .

[0044] Among them, precision resistors can play the following roles: used as current detection resistors, connected in series in the input or output path of the battery, by measuring the voltage drop on the precision resistor, the current flowing through the battery can be accurately calculated, which is used to monitor the charging and discharging process to ensure that the battery is not damaged by overcurrent; precision resistors can also play a voltage sampling role. The precision resistors are connected to each battery cell of the battery to accurately monitor the voltage state of each battery cell to maintain the balance of the battery pack and prevent the battery from being overcharged or over-discharged; precision resistors can also be used for overcurrent protection. When the current in the circuit increases abnormally and causes the precision resistor to heat up, its resistance will increase accordingly, thereby limiting the current and playing a role in overcurrent protection to prevent the battery and circuit components from being damaged by short circuits or other faults.

[0045] Semiconductor transistors can be used as electronic switches to open or close the battery's charge and discharge paths according to the control signal in the circuit. In the event of overcurrent or short circuit, semiconductor transistors quickly respond to control signals, cut off current, and prevent damage to the battery and circuit; they can also participate in the battery's overtemperature protection collaboration process. When overheated, semiconductor transistors themselves will show the characteristics of increased on-resistance or complete shutdown, indirectly assisting in overtemperature protection. Fuses can work with precision resistors or semiconductor transistors to participate in the battery's overcurrent protection or short-circuit protection process.

[0046] The above-mentioned electronic components 11 will generate a lot of heat during long-term operation. The heat-conducting protrusion 21 is connected to the electronic component 11 through heat-conducting glue. When the battery works for a long time, the heat dissipated by the electronic component 11 is conducted to the heat-conducting protrusion 21 through the heat-conducting glue, thereby expanding the heat dissipation area of ​​the electronic component 11. Heat can be dissipated into the environment from both the electronic component 11 and the heat-conducting protrusion 21, thereby improving the heat dissipation efficiency and extending the battery life.

[0047] The number of thermally conductive protrusions 21 of the heat dissipation structure can be set according to the number of electronic components 11. For example, the number of thermally conductive protrusions 21 can be set to one, corresponding to all the electronic components 11 on the protective plate 10. Of course, the number of thermally conductive protrusions 21 can also be set to more to correspond to the electronic components 11 on the protective plate 10 in different ways. For example, the correspondence between the thermally conductive protrusions 21 and the electronic components 11 can be one thermally conductive protrusion 21 corresponding to two electronic components 11 to dissipate heat. Of course, one thermally conductive protrusion 21 can also correspond to one electronic component 11 to improve the heat dissipation effect.

[0048] Furthermore, when installing the protective plate 10, the side of the protective plate 10 on which the electronic components 11 are not set can be set toward the battery. In this way, the heat sink 20 is located on the side of the protective plate 10 away from the battery. During heat dissipation, the heat is conducted from the electronic components 11 to the heat conductive protrusions, and then dissipated to the environment through the heat sink 20. The heat diffusion direction is away from the battery, which is beneficial to improving the service life of the battery.

[0049] It is understandable that, during the design, there may be a gap between the heat-conducting protrusion 21 and the electronic component 11, and the gap may not exceed 0.2 mm, such as 0.1 mm, 0.15 mm or 0.2 mm. Of course, the present invention does not limit this, and the width of the gap may be reasonably set within the above range according to actual needs. By filling the gap with thermally conductive adhesive to ensure the heat conduction effect, on the one hand, compared with the direct contact between the heat-conducting protrusion 21 and the electronic component 11, the thermally conductive adhesive may have a larger diffusion area on the electronic component 11 to improve the heat dissipation efficiency, and on the other hand, it avoids interference between the heat-conducting protrusion 21 and the electronic component 11 during the installation process, resulting in damage to the electronic component 11.

[0050] In addition, the thermal conductive adhesive can be a thermoplastic colloid, and the area on the heat sink 20 where the thermal conductive protrusion 21 is not provided can also be filled with thermal conductive adhesive, so that the side surface of the protective plate 10 where the electronic component 11 is provided is connected to the heat sink 20 through the thermal conductive adhesive, thereby improving the heat dissipation effect.

[0051] In some embodiments, in a reference plane perpendicular to the first direction, the projection of the electronic component 11 is located within the projection of the thermally conductive protrusion 21, and the thermally conductive adhesive covers the electronic component 11 to ensure that the area of ​​the thermally conductive surface of the thermally conductive protrusion 21 facing the electronic component 11 exceeds the area of ​​the heat dissipation surface of the electronic component 11 facing the heat dissipation plate 20, so that the heat of the electronic component 11 can be fully conducted to the thermally conductive protrusion 21 through the heat dissipation surface, thereby improving the heat dissipation efficiency.

[0052] refer to Figure 3 and Figure 4 In some embodiments, since there may be a variety of electronic components 11 on the protection plate 10, a plurality of layout areas are provided on the protection plate 10, and an electronic component 11 is provided in each layout area. Optionally, the electronic components 11 may be provided in respective layout areas according to factors such as the number, shape, size, and type of the electronic components 11. For example, the plurality of layout areas may include a first layout area 12a, a second layout area 12b, and a third layout area 12c, and the plurality of electronic components 11 may include a first type component, a second type component, a third type component, and the like, wherein the first type component is provided in the first layout area 12a, the second type component is provided in the second layout area 12b, and the third type component is provided in the third layout area 12c. In a specific example, the above-mentioned precision resistor may be provided in the first layout area 12a, a semiconductor transistor may be provided in the second layout area 12b, and a fuse may be provided in the third layout area 12c.

[0053] Multiple heat-conducting protrusions 21 correspond to the arrangement areas one by one, and each heat-conducting protrusion 21 is opposite to the corresponding arrangement area. For example, the heat-conducting protrusion 21 may include a first heat-conducting protrusion 21a, a second heat-conducting protrusion 21b and a third heat-conducting protrusion 21c. The first heat-conducting protrusion 21a corresponds to the first arrangement area 12a, the second heat-conducting protrusion 21b corresponds to the second arrangement area 12b, and the third heat-conducting protrusion 21c corresponds to the third arrangement area 12c, so as to facilitate the electronic components 11 in the corresponding arrangement area to dissipate heat through the corresponding heat-conducting protrusion 21.

[0054] refer to Figure 5, further, within the reference plane, the outer contour shape of the projection of the heat-conducting protrusion 21 is constructed to match the outer contour shape of the projection of the electronic component 11. For example, since the circuit design of the precision resistor on the protection plate 10 has a protrusion parallel to the protection plate 10, the first heat-conducting protrusion 21a is formed with a protrusion at the corresponding position, and the rest is an L-shaped block corresponding to the precision resistor; the semiconductor transistor has a boat-shaped structure with narrow ends and a wide middle, the second heat-conducting protrusion 21b is formed with a boat-shaped structure corresponding thereto, the fuse is rectangular, and the third heat-conducting protrusion 21c is formed with a rectangle at the corresponding position. By matching the shapes of the multiple heat-conducting protrusions 21 with the shapes of the corresponding areas of the electronic component 11, the electronic component 11 in the arrangement area can fully contact the heat dissipation protrusion to improve the heat dissipation efficiency.

[0055] refer to Figure 6 In some embodiments, the heat sink 20 may include a first surface and a second surface opposite to each other along a first direction, the first surface faces the electronic component 11, the thermal conductive protrusion 21 is formed by the second surface protruding toward the first surface, and a groove 22 adapted to the shape of the thermal conductive protrusion 21 is formed on one side of the second surface. For example, the heat sink 20 can be stamped from the second surface side toward the first surface side. In this way, the groove 22 adapted to the shape of the thermal conductive protrusion 21 can be formed while the thermal conductive protrusion is formed.

[0056] At this time, the groove 22 constructs the heat-conducting protrusion 21 as a shell protruding toward the protective plate 10, which greatly reduces the internal volume of the heat-conducting protrusion 21. The heat conduction rate of heat transferred from the electronic component 11 to the heat-conducting protrusion on the shell structure is higher than the heat conduction efficiency in the solid heat-conducting protrusion 21, and the heat conduction effect is faster. Compared with the heat-conducting protrusion 21 with a solid structure, the original heat dissipation path needs to be transferred to the heat sink 20 through the heat-conducting protrusion 21 for heat dissipation, while the heat-conducting protrusion 21 constructed as a shell by the groove 22, after the heat is transferred to the heat-conducting protrusion 21, it can be directly diffused into the environment through the inner wall of the groove 22, the heat dissipation path is shortened, the heat dissipation area is increased, and the heat dissipation efficiency is greatly improved.

[0057] In addition, compared with the solution in which the heat-conducting protrusion 21 is a solid structure, the weight of the heat sink 20 can be reduced, which is beneficial to reducing the weight of the energy storage system on the one hand, and can reduce material consumption and material cost on the other hand.

[0058] Further, a plurality of heat sinks 23 are arranged on the second surface, and the plurality of heat sinks 23 are arranged parallel to each other and at intervals. The heat sinks 23 are used to increase the heat dissipation area of ​​the heat sink 20 to improve the heat dissipation efficiency. For example, the heat sink 23 may include fence bars, and the plurality of fence bars are arranged at equal intervals on the second surface of the heat sink 20 and protrude in a direction away from the second surface. In this case, the surface area of ​​the fence bars protruding from the second surface is the enlarged heat dissipation area, and the heat can be dissipated through the surface area of ​​the fence bars exposed to the environment, and the heat dissipation effect is good.

[0059] Furthermore, in the thickness direction of the protection plate 10, the height H of the fence bar satisfies: H≤2.25mm. For example, the height of the fence bar can be 0.5mm, 1mm, 1.5mm, 2mm or 2.25mm to facilitate the installation of the battery protection device 1 so that the battery protection device 1 will not exceed the side wall edge of the battery when installed on the battery.

[0060] In addition, the thickness T of the fence bar needs to satisfy: T≤0.9mm; for example, the thickness T of the fence bar can be 0.1mm, 0.2mm, 0.3mm0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm or 0.9mm. Of course, the thickness of the fence bar can also be other sizes. This application does not limit this. In this way, it can be avoided that when the thickness of the fence bar is too small, the structural strength of the fence bar itself is too small and it is easy to deform, and it can also be avoided that when the thickness is too large, it is not conducive to improving the heat dissipation efficiency.

[0061] There may be a spacing S between the fence bars, and the thickness T of the fence bars at the spacing S satisfies: 1.5≤S / T≤3. For example, the value of S / T may be 1.5, 1.8, 2, 2.2, 2.5, 2.8 or 3. Preferably, the value of S / T may be 2. In this way, it is possible to avoid the situation where the spacing between two adjacent fence bars is too small, resulting in the overlap of the heat dissipation influence areas of the two adjacent fence bars, causing a decrease in heat dissipation efficiency; it is also possible to avoid the situation where the spacing between two adjacent fence bars is too large, resulting in too few fence bars, and the interval between the heat dissipation influence areas of the two adjacent fence bars is too large, which is not conducive to improving the heat dissipation efficiency.

[0062] In summary, this embodiment can maximize the heat dissipation surface area of ​​the heat sink 20 on the second surface by jointly regulating the thickness of the fence bars and the distance S between two adjacent fence bars, thereby improving the heat dissipation efficiency.

[0063] refer to Figures 2 to 5 In some embodiments, a first connection hole 13 is provided on the protection plate 10, and a second connection hole 24 is provided on the heat dissipation plate 20. The first connection hole 13 and the second connection hole 24 are arranged relatively to each other. The battery protection device 1 may further include a fastener 30. The fastener 30 passes through the first connection hole 13 and the second connection hole 24 in sequence to connect the protection plate 10 and the heat dissipation plate 20.

[0064] The fastener 30 is also called a connector. The protection plate 10 and the heat sink 20 can be connected by the fastener 30 to ensure a stable connection between the protection plate 10 and the heat sink 20 and to ensure the heat dissipation efficiency of the heat sink 20. For example, the fastener 30 can be a bolt, a nut, a screw, a small nail or a rivet. The fastener 30 of this embodiment can be a screw for easy disassembly and assembly.

[0065] Furthermore, a connecting column 25 may be provided on the heat sink 20, and the connecting column 25 defines a second connecting hole 24, and one end of the connecting column 25 away from the heat sink 20 abuts against the protective plate 10. In this way, the fastener 30 can pass through the first mounting hole and be threadedly connected and fixed with the second connecting hole 24 in the connecting column 25, so as to connect and fix the protective plate 10 and the heat sink 20. Among them, the connecting column 25 plays a supporting role for the heat sink 20 and the protective plate 10. At the same time, the connecting column 25 can define a setting space for the heat-conducting protrusion 21 and the electronic component 11 between the heat sink 20 and the protective plate 10, thereby improving the structural stability of the battery protection device 1.

[0066] refer to Figure 5 , there may be multiple connecting columns 25, for example, there may be two, three, or four connecting columns 25, etc., and this application does not impose any restrictions on this. At least some of the connecting columns 25 are arranged in connection with the heat-conducting protrusion 21. For example, one or more connecting columns 25 may be directly connected to the heat-conducting protrusion 21 to increase the heat dissipation area of ​​the heat-conducting protrusion 21 and improve the heat dissipation effect; or, when the location of the heat-conducting protrusion 21 is far away from the connecting column 25, ribs may be provided between the connecting column 25 and the heat-conducting protrusion 21 on the heat sink 20. On the one hand, the supporting effect of the connecting column 25 is improved by the ribs, and the stability of the structure is enhanced. On the other hand, the heat can be conducted to the connecting column 25 through the ribs and diffused outward, thereby increasing the heat dissipation area and improving the heat dissipation effect.

[0067] According to some embodiments of the present invention, the heat sink 20 is a magnesium-aluminum alloy, and the thermal conductivity of the heat sink 20 is 100W / (m·K)-120W / (m·K), for example, the thermal conductivity of the heat sink 20 can be 100W / (m·K), 105W / (m·K), 110W / (m·K), 115W / (m·K) or 120W / (m·K); the thermal conductivity of the thermal conductive adhesive is 5W / (m·K)-10W / (m·K), for example, the thermal conductivity of the thermal conductive adhesive can be 5W / (m·K), 6W / (m·K), 7W / (m·K), 8W / (m·K), 9W / (m·K) or 10W / (m·K). Of course, the thermal conductivity of the heat sink 20 and the thermal conductive adhesive can be other values, and the present application does not limit this. The heat dissipation effect of the battery protection device 1 is ensured by designing the material of the heat dissipation plate 20 , the thermal conductivity of the heat dissipation plate 20 , and the thermal conductivity of the thermal conductive adhesive.

[0068] The second aspect of the utility model also provides an energy storage system, which may include an energy storage battery and the above-mentioned battery protection device, wherein the protection plate 10 of the battery protection device is electrically connected to the energy storage battery. Due to the use of the above-mentioned battery protection device, the heat dissipation efficiency of the electronic component 11 is improved, and the service life of the energy storage system is extended.

[0069] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0070] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery protection device, characterized in that: include: A protection plate, wherein at least one side surface of the protection plate along the first direction is provided with electronic components; A heat sink, the heat sink is arranged on the side of the protection plate where the electronic component is located, the heat sink is provided with a heat dissipation structure, and the heat dissipation structure includes at least one heat-conducting protrusion protruding toward the electronic component; Thermally conductive adhesive, the thermally conductive adhesive is at least filled between the thermally conductive protrusion and the electronic component.

2. A battery protection device according to claim 1, characterized in that: The projection of the electronic component in the reference plane is located within the projection of the heat-conducting protrusion in the reference plane, and the reference plane is perpendicular to the first direction; And / or, the thermally conductive adhesive covers the electronic component.

3. A battery protection device according to claim 1, characterized in that: The protective plate is provided with a plurality of arrangement areas, each of which is provided with the electronic component, and the thermal conductive protrusions are a plurality of ones corresponding to the arrangement areas one by one, and each of the thermal conductive protrusions is opposite to the corresponding arrangement area so as to be in heat dissipation contact with the electronic component in the corresponding arrangement area.

4. A battery protection device according to claim 1, characterized in that: The heat dissipation plate includes a first surface and a second surface opposite to each other along the first direction, the first surface faces the electronic component, The heat-conducting protrusion is formed by the second surface protruding toward the first surface, and a groove matching the shape of the heat-conducting protrusion is formed on one side of the second surface.

5. A battery protection device according to claim 2, characterized in that: An outer contour shape of a projection of the heat conductive protrusion on the reference plane matches an outer contour shape of a projection of the electronic component on the reference plane.

6. A battery protection device according to claim 4, characterized in that: The second surface is provided with a plurality of heat dissipating elements, and the plurality of heat dissipating elements are arranged parallel to each other and at intervals.

7. A battery protection device according to claim 6, characterized in that: The heat sink comprises fence bars, and in the thickness direction of the protection plate, the height H of the fence bars satisfies: H≤2.25 mm; and / or, The thickness T of the fence bar satisfies: T≤0.9 mm; and / or, The spacing S between the fence bars and the thickness T of the fence bars satisfy: 1.5≤S / T≤3.

8. A battery protection device according to claim 1, characterized in that: The protection plate is provided with a first connection hole, the heat dissipation plate is provided with a second connection hole, the first connection hole and the second connection hole are arranged opposite to each other, The battery protection device further includes a fastener, and the protection plate and the heat dissipation plate are connected by the fastener passing through the first connection hole and the second connection hole in sequence.

9. A battery protection device according to claim 8, characterized in that: The heat dissipation plate is provided with a connecting column, the connecting column defines the second connecting hole, and one end of the connecting column away from the heat dissipation plate abuts against the protection plate. Furthermore, at least a portion of the connection columns are connected to the heat-conducting protrusions.

10. An energy storage system, characterized in that: include: Energy storage batteries; The battery protection device according to any one of claims 1 to 9, wherein the protection plate is electrically connected to the energy storage battery.

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