Vibration reduction structure and energy storage equipment

Abstract

The utility model provides a vibration reduction structure which is applied to a circuit board in energy storage equipment, the circuit board is provided with a mounting surface, and the vibration reduction structure comprises a radiator, a limiting piece and an abutting assembly. The radiator is arranged on the mounting surface. The limiting piece is fixed to the side, away from the installation face, of the radiator and abuts against the face, away from the installation face, of the radiator. The abutting assembly is fixed to the side, away from the mounting face, of the circuit board and abuts against the fixing position of the circuit board and the radiator. The limiting piece and the abutting assembly abut against the two ends of the radiator to form a state of clamping the radiator, so that the radiator is fixed relative to the limiting piece and the abutting assembly, the limiting piece and the abutting assembly are both fixedly arranged, and therefore in the transportation and use process of the energy storage equipment, the vibration amplitude of the radiator can be limited by the limiting piece and the abutting assembly, and the energy storage equipment cannot be damaged. Therefore, the vibration amplitude of the circuit board caused by the shaking of the radiator is reduced, the pin damage of a heating device attached to the radiator caused by the overlarge vibration amplitude is avoided, and the reliability of the product is improved.

Description

Technical Field

[0001] The present application relates to the field of vibration damping of energy storage devices, and particularly to a vibration damping structure and an energy storage device. Background Art

[0002] During the transportation or use of an energy storage device, the energy storage device will generate vibrations. A circuit board is provided inside the energy storage device, and a heat sink is arranged on the circuit board. The heat sink has a relatively large mass, and some heat generating devices are attached to the heat sink. The pins of the heat generating devices are connected to the circuit board. When the energy storage device vibrates, the circuit board will vibrate along with the whole device. Especially in the part of the circuit board where the heat sink is provided, due to the relatively large mass of the heat sink, the amplitude of the reciprocating vibration is relatively large, resulting in a relatively large fatigue stress on the pins of some heat generating devices attached to the heat sink, which easily causes the pins of the heat generating devices to break, resulting in damage to the energy storage device and reducing the reliability of the product. Summary of the Utility Model

[0003] In view of this, the present application provides a vibration damping structure and an energy storage device that can reduce the vibration of the heat sink of the circuit board.

[0004] In an embodiment of the present application, a vibration damping structure is provided, which is applied to a circuit board in an energy storage device. The circuit board has a mounting surface. The vibration damping structure includes a heat sink, a limiting member, and a supporting component. The heat sink is arranged on the mounting surface. The limiting member is fixed on the side of the heat sink away from the mounting surface and abuts against the surface of the heat sink facing away from the mounting surface. The supporting component is fixed on the side of the circuit board facing away from the mounting surface and abuts against the fixing position of the circuit board and the heat sink.

[0005] In the vibration damping structure provided by the present application, the limiting member abuts against the surface of the heat sink away from the mounting surface, and the supporting component abuts against the fixing position of the circuit board and the heat sink. This is equivalent to clamping the heat sink at both ends by the limiting member and the supporting component, forming a state of clamping the heat sink, so that the heat sink is fixed relative to the limiting member and the supporting component. Since both the limiting member and the supporting component are fixedly arranged, during the transportation and use of the energy storage device, the vibration amplitude of the heat sink will be limited by the limiting member and the supporting component, thereby reducing the amplitude of the vibration of the circuit board caused by the shaking of the heat sink, avoiding damage to the pins of the heat generating devices attached to the heat sink due to excessive amplitude, and improving the reliability of the product.

[0006] In some embodiments, the supporting component includes a fixing member and a supporting member. The fixing member is arranged at the fixing position and is configured to fix the circuit board and the heat sink. The supporting member is fixed on the side of the circuit board facing away from the mounting surface and abuts against the fixing position.

[0007] In some embodiments, the fixing member passes through the circuit board. One end of the fixing member forms a protruding portion, which is located on the side of the circuit board facing away from the mounting surface and abuts against the circuit board. The other end of the fixing member is fixed to the heat sink, and the supporting member abuts against the protruding portion.

[0008] In some embodiments, one end of the heat sink close to the circuit board penetrates through the circuit board, the fixing member fills the gap between one end of the heat sink close to the circuit board and the circuit board, and connects the circuit board and the heat sink, and the abutting member abuts against one end of the heat sink close to the circuit board.

[0009] In some embodiments, the abutting member includes a supporting portion and a limiting portion. The side of the supporting portion facing the protruding portion has a supporting surface, the supporting surface abuts against the protruding portion, the limiting portion surrounds the supporting portion, the inner side of the limiting portion facing the supporting portion has a limiting surface, the limiting surface and the supporting surface form a limiting groove, the limiting groove accommodates the protruding portion, and the limiting surface limits the protruding portion.

[0010] In some embodiments, the limiting portion is elastic, and the limiting portion abuts against the side of the circuit board facing away from the mounting surface.

[0011] In some embodiments, there are at least two fixing members, and both ends of the side of the heat sink fixed to the circuit board in the length direction are fixed to the circuit board through the fixing members respectively.

[0012] In some embodiments, the heat sink has a main body portion. One end of the main body portion close to the circuit board is fixed to the circuit board. One end of the main body portion facing away from the mounting surface is for at least part of the limiting member to abut against, and the abutting assembly abuts against the fixing position of the circuit board and the main body portion.

[0013] In some embodiments, the limiting members abut against both ends of the side of the main body portion facing away from the mounting surface in the length direction.

[0014] In some embodiments, the main body portion includes a first sub-portion, a second sub-portion and a third sub-portion. The first sub-portion and the second sub-portion are arranged at intervals. One ends of the first sub-portion and the second sub-portion close to the circuit board are both fixed to the circuit board. A third sub-portion is arranged between the first sub-portion and the second sub-portion. One ends of the first sub-portion facing away from the circuit board and the second sub-portion facing away from the circuit board are both connected to the third sub-portion. There are multiple limiting members and abutting assemblies. The multiple limiting members respectively abut against the first sub-portion, the second sub-portion and the third sub-portion, and the multiple abutting assemblies respectively abut against the fixing positions of the first sub-portion and the circuit board and the fixing position of the second sub-portion and the circuit board.

[0015] In some embodiments, the heat sink further includes fins, the fins are connected to the side of the second sub-portion facing away from the first sub-portion, and are arranged at one end of the second sub-portion far from the circuit board. At least a part of one of the multiple limiting members abuts against the second sub-portion, and another part abuts against the fins. At least another one of the multiple limiting members abuts against the third sub-portion.

[0016] In some embodiments, the limiting member is a first elastic member, and the acting force of the first elastic member abutting against the third sub-portion is greater than the acting force of the first elastic member abutting against the fins.

[0017] In some embodiments, the first elastic member is fixedly adhered to the radiator.

[0018] In some embodiments, the damping structure further includes a plurality of second elastic members fixed to the side of the circuit board facing away from the radiator. The plurality of second elastic members are spaced apart and abut against the side of the circuit board facing away from the radiator, and are spaced apart from the abutting assembly.

[0019] In some embodiments, the second elastic member is adhered to the side of the circuit board facing away from the radiator.

[0020] In an embodiment of the present application, an energy storage device is further provided. The energy storage device includes a battery cell housing, an outer shell, a circuit board, and the damping structure in any of the above embodiments. The battery cell housing is disposed inside the outer shell, the circuit board is disposed between the battery cell housing and the outer shell, the limiting member is disposed on the side of the outer shell facing the circuit board, and the abutting assembly is disposed on the side of the battery cell housing facing the circuit board.

[0021] In the energy storage device provided by the present application, the limiting member abuts against the side of the radiator away from the mounting surface, and the abutting assembly abuts against the fixed position of the circuit board and the radiator. Equivalent to abutting against both ends of the radiator through the limiting member and the abutting assembly, a state of clamping the radiator is formed, so that the radiator is fixed relative to the limiting member and the abutting assembly, and both the limiting member and the abutting assembly are fixedly arranged. Therefore, during the transportation and use of the energy storage device, the vibration amplitude of the radiator will be limited by the limiting member and the abutting assembly, thereby reducing the amplitude of the vibration of the circuit board caused by the shaking of the radiator, avoiding the damage of the pins of the heat generating device attached to the radiator due to excessive amplitude, and improving the reliability of the energy storage device.

[0022] In some embodiments, a first mounting groove is provided on the side of the outer shell facing the circuit board, and a second mounting groove is provided on the side of the battery cell housing facing the circuit board. The first mounting groove is used to mount the limiting member, and the second mounting groove is used to mount the abutting assembly. Description of the Drawings

[0023] Figure 1 Is a perspective view of the energy storage device in an embodiment of the present application.

[0024] Figure 2 Is Figure 1 The exploded view of the energy storage device in

[0025] Figure 3 Is a cross-sectional view of the energy storage device in an embodiment of the present application.

[0026] Figure 4 Is Figure 3 The enlarged view at IV in

[0027] Figure 5 Is a perspective view of the battery cell housing in an embodiment of the present application.

[0028] Figure 6A cross-sectional view of an energy storage device in an embodiment of the present application.

[0029] Figure 7 A perspective view of the internal structure of an energy storage device in an embodiment of the present application.

[0030] Figure 8 Is Figure 7 A perspective view of another angle of the internal structure of the energy storage device in

[0031] Description of main component symbols

[0032] 100 - Vibration damping structure 200 - Energy storage device 300 - Heating device

[0033] 201 - Cell housing 2011 - Enclosing wall 2012 - Second mounting groove

[0034] 2013 - Third mounting groove 202 - Outer shell 2021 - First mounting groove

[0035] 203 - Circuit board 2031 - Mounting surface 10 - Radiator

[0036] 11 - Main body part 111 - First sub - part 112 - Second sub - part

[0037] 113 - Third sub - part 12 - Fins 20 - Limiting member

[0038] 21 - First elastic member 30 - Abuttment assembly 31 - Abutting member

[0039] 311 - Support part 3111 - Support surface 312 - Limiting part

[0040] 3121 - Limiting surface 313 - Limiting groove 32 - Fixing member

[0041] 321 - Protruding part 40 - Second elastic member. Detailed implementation manners

[0042] Next, the technical solutions of the present application will be described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments.

[0043] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0045] During the transportation or use of the energy storage device, the energy storage device will vibrate. The energy storage device is equipped with a circuit board, and the circuit board is equipped with a heat sink. The heat sink is heavy, and some heating devices are attached to the heat sink. The pins of the heating devices are connected to the circuit board. When the energy storage device vibrates, the circuit board will vibrate with the whole device, especially the part of the circuit board with the heat sink. Since the heat sink is heavy, the amplitude of the reciprocating vibration is large, causing the pins of some heating devices attached to the heat sink to be subject to greater fatigue stress, which can easily cause the pins of the heating devices to break, resulting in damage to the energy storage device and reducing the reliability of the product.

[0046] In view of this, the present application provides a vibration reduction structure and energy storage device that can reduce the vibration of the heat sink of a circuit board. The vibration reduction structure is applied to the circuit board in the energy storage device, the circuit board has a mounting surface, and the vibration reduction structure includes a heat sink, a limiter and a support assembly. The heat sink is arranged on the mounting surface. The limiter is fixed to the side of the heat sink away from the mounting surface, and is supported on the side of the heat sink away from the mounting surface. The support assembly is fixed to the side of the circuit board away from the mounting surface, and is supported at the fixed position of the circuit board and the heat sink.

[0047] In the vibration reduction structure provided by the present application, the limit member presses against the side of the radiator away from the mounting surface, and the pressing assembly presses against the fixed position of the circuit board and the radiator, which is equivalent to pressing against the two ends of the radiator by the limit member and the pressing assembly, forming a clamping state of the radiator, so that the radiator is fixed relative to the limit member and the pressing assembly, and the limit member and the pressing assembly are both fixedly arranged, so during the transportation and use of the energy storage device, the vibration amplitude of the radiator will be limited by the limit member and the pressing assembly, thereby reducing the amplitude of the circuit board vibration caused by the shaking of the radiator, avoiding damage to the pins of the heating device attached to the radiator due to excessive amplitude, and improving the reliability of the product.

[0048] The following will, in conjunction with the accompanying Figures 1 to 8 , elaborate on some embodiments of the present application. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0049] For example Figures 1 to 3 As shown, in some embodiments of the present application, a vibration damping structure 100 and an energy storage device 200 are provided. The energy storage device 200 includes a battery cell housing 201, an outer housing 202, a circuit board 203, and a vibration damping structure 100. The battery cell housing 201, the circuit board 203, and the vibration damping structure 100 are all disposed within the outer housing 202. The circuit board 203 is disposed between the top of the battery cell housing 201 and the top of the outer housing 202. The vibration damping structure 100 is disposed on the side of the outer housing 202 facing the circuit board 203 and on the side of the battery cell housing 201 facing the circuit board 203. The vibration damping structure 100 is used to dampen vibrations of the circuit board 203.

[0050] Exemplarily, the energy storage device 200 can be a portable power source applied to outdoor scenarios, or a home energy storage system for home energy storage, etc. The circuit board 203 can be used as an inverter module to control the charging and discharging of the battery cells within the battery cell housing 201, so as to enable the battery cells to supply power to external devices, or enable external devices to charge the battery cells. The circuit board 203 can also be a battery management module, which is used to intelligently manage and maintain each battery cell, monitor the state of the battery cells, and prevent the battery cells from overcharging and over-discharging, so as to extend the service life of the battery cells.

[0051] In some embodiments, the circuit board 203 has an installation surface 2031. The installation surface 2031 is the side of the circuit board 203 facing away from the battery cell housing 201, that is, the side of the circuit board 203 facing the top of the outer housing 202, and is also the front side of the circuit board 203. The vibration damping structure 100 includes a heat sink 10, a limiting member 20, and a resisting assembly 30. The heat sink 10 is disposed on the installation surface 2031. The limiting member 20 is fixed to the side of the heat sink 10 away from the installation surface 2031 and abuts against the side of the heat sink 10 facing away from the installation surface 2031, that is, the limiting member 20 applies a force to the heat sink 10 in the direction towards the installation surface 2031. The resisting assembly 30 is fixed to the side of the circuit board 203 facing away from the installation surface 2031 and abuts against the fixing position of the circuit board 203 and the heat sink 10, that is, the resisting assembly 30 applies a force to the fixing position of the circuit board 203 and the heat sink 10 in the direction towards the top of the outer housing 202.

[0052] Exemplarily, a heating device 300 is attached to the radiator 10, and the radiator 10 is used to dissipate heat from the heating device 300. The pins of the heating device 300 are connected to the circuit board 203, wherein the heating device 300 can be a semiconductor field effect transistor (MOS tube), etc. Since the space of the energy storage device 200 is limited and the components arranged on the circuit board 203 are relatively compact, the circuit board 203 and the battery shell 201 can only be fixed to the battery shell 201 by screws at the four corners of the circuit board 203 during installation, and there is no space to set screws in the middle part of the circuit board 203, resulting in the middle part of the circuit board 203 being suspended. During transportation or use of the energy storage device 200, the suspended middle part of the circuit board 203 vibrates greatly, especially when a heat sink 10 with a large mass is set in the middle part of the circuit board 203. The reciprocating amplitude of the middle part of the circuit board 203 is even greater, causing the pins of the heating device 300 (such as MOS tubes, etc.) on the circuit board 203 to be subjected to greater fatigue stress, which can easily cause breakage, resulting in failure of the circuit board 203 and damage to the energy storage device, thereby reducing the reliability of the product.

[0053] In the above-mentioned vibration reduction structure 100, the limiting member 20 abuts against the side of the heat sink 10 away from the mounting surface 2031, and the abutting assembly 30 abuts against the fixed position of the circuit board 203 and the heat sink 10, which is equivalent to the limiting member 20 and the abutting assembly 30 abutting against the opposite ends of the heat sink 10 to form a clamping state of the heat sink 10, so that the heat sink 10 is fixed relative to the limiting member 20 and the abutting assembly 30, and the limiting member 20 and the abutting assembly 30 are both fixedly arranged, so during the transportation and use of the energy storage device 200 During the process, the vibration amplitude of the radiator 10 will be limited by the limit member 20 and the supporting assembly 30. Even if the radiator 10 is located in the suspended part in the middle of the circuit board 203, clamping the radiator 10 by the limit member 20 and the supporting assembly 30 can enhance the stability of the suspended part in the middle of the circuit board 203, thereby reducing the amplitude of the vibration of the circuit board 203 caused by the shaking of the radiator 10, avoiding damage to the pins of the heating device 300 attached to the radiator 10 due to excessive amplitude, and improving the reliability of the product.

[0054] In some embodiments, Figures 3 to 5 As shown, the abutting assembly 30 includes a abutting member 31 and a fixing member 32. The fixing member 32 is disposed at a fixed position between the circuit board 203 and the radiator 10 and is configured to fix the circuit board 203 and the radiator 10. The abutting member 31 is fixed to a side of the circuit board 203 away from the mounting surface 2031 and is used to abut the fixed position of the circuit board 203 and the radiator 10. The abutting assembly 30 fixes the circuit board 203 and the radiator 10 through the fixing member 32 and clamps the radiator 10 in combination with the abutting member 31.

[0055] In some embodiments, the fixing member 32 is passed through the circuit board 203, and one end of the fixing member 32 forms a protrusion 321, which is located on the side of the circuit board 203 away from the mounting surface 2031 and abuts against the circuit board 203. The other end of the fixing member 32 is fixed to the heat sink 10, and the abutting member 31 abuts against the protrusion 321. Since the fixed position of the circuit board 203 and the heat sink 10 is the position of the fixing member 32, the abutting member 31 can indirectly abut against the heat sink 10 by abutting against the protrusion 321, so as to play the role of clamping the heat sink 10. As an illustrative example, the fixing member 32 is a screw, one end of which is threadedly connected to the heat sink 10, the protrusion 321 is the head of the screw, and the abutting member 31 abuts against the head of the screw.

[0056] In some embodiments, Figure 3 , Figure 4 and Figure 6 As shown, the fixing member 32 has at least two fixing members, one side of the heat sink 10 and the circuit board 203 is fixed along the length direction (see Figure 7 The two ends of the heat sink 10 (in the X direction shown) are fixed to the circuit board 203 by fixing members 32 to improve the connection strength between the heat sink 10 and the circuit board 203, thereby reducing the probability of the heat sink 10 being separated from the circuit board 203, and the protrusion 321 of each fixing member 32 is abutted by a corresponding abutting member 31, thereby improving the stability and reliability of the heat sink 10 and the circuit board 203. In addition, the fixing members 32 are located at both ends of the heat sink 10, which can fix the edge of the heat sink 32 to prevent the edge of the heat sink 32 from warping, resulting in the problem of the pins of the heating device 300 attached to the edge of the heat sink 32 being torn from the circuit board 203, thereby improving the reliability of the product. It can be understood that the heat sink 10 can be fixed to the circuit board 203 along the length direction by more fixing members 32, such as three, four or five fixing members 32, and the multiple fixing members 32 are arranged at intervals, and the protrusion 321 of each fixing member 32 is abutted by a corresponding abutting member 31, so as to further improve the stability and reliability of the heat sink 10 and the circuit board 203.

[0057] In some embodiments, Figures 3 to 5As shown in the figure, the holding member 31 includes a supporting portion 311 and a limiting portion 312. The side of the supporting portion 311 facing the protruding portion 321 has a supporting surface 3111. The supporting surface 3111 contacts and holds the protruding portion 321. The limiting portion 312 surrounds the supporting portion 311. The inner side of the limiting portion 312 facing the supporting portion 311 has a limiting surface 3121. The limiting surface 3121 and the supporting surface 3111 form a limiting groove 313. The limiting groove 313 is used to accommodate the protruding portion 321. The limiting surface 3121 is used to limit the protruding portion 321 to prevent the protruding portion 321 from separating from the supporting surface 3111, thereby improving the stability of the holding of the protruding portion 321 by the supporting surface 3111. As an exemplary example, the supporting portion 311 is a cylinder protruding from the top surface of the battery cell case 201, the supporting surface 3111 is the top surface of the cylinder, the limiting portion 312 is an annular sleeve sleeved on the outer peripheral side of the cylinder, the limiting surface 3121 is the inner surface of the sleeve, and the portion of the sleeve higher than the cylinder forms a limiting groove 313 with the cylinder to facilitate installation.

[0058] In some embodiments, the limiting portion 312 is elastic. The limiting portion 312 holds the side of the circuit board 203 facing away from the mounting surface 2031 to play a vibration damping role for the circuit board 203, further reducing the amplitude of vibration of the circuit board 203, so as to improve the stability and reliability of the circuit board 203. At the same time, since the limiting portion 312 is an elastic member, it can play a protective role for the circuit board 203 to avoid damage to the circuit board 203 and the components on the circuit board 203 caused by hard holding. Exemplarily, the limiting portion 312 is made of an elastic material such as silica gel, rubber or sponge.

[0059] In some other embodiments, the circuit board 203 and the heat sink 10 are fixed by welding, and the fixing member 32 is solder such as welding tin. One end of the heat sink 10 close to the circuit board 203 penetrates through the circuit board 203. The fixing member 32 fills the gap between one end of the heat sink 10 close to the circuit board 203 and the circuit board 203, and fixes the circuit board 203 and the heat sink 10. The holding member 31 holds one end of the heat sink 10 close to the circuit board 203, that is, the holding member 31 directly contacts and holds the heat sink 10, so that the holding member 31 can directly apply force to the heat sink 10 rather than indirectly, ensuring the clamping effect of the holding member 31 on the heat sink 10, thereby improving the stability of the heat sink 10 and reducing the amplitude of vibration of the heat sink 10.

[0060] In some embodiments, such as Figure 3 、 Figure 7 and Figure 8As shown, the heat sink 10 has a main body portion 11. One end of the main body portion 11 close to the circuit board 203 is fixed to the circuit board 203, and the heat generating device 300 is attached to the main body portion 11. At least a part of the limiting member 20 abuts against one end of the main body portion 11 facing away from the mounting surface 2031, and the abutting assembly 30 abuts against the fixing position of the circuit board 203 and the main body portion 11, so that the limiting member 20 and the abutting assembly 30 clamp the main body portion 11. Since most of the weight of the heat sink 10 is concentrated on the main body portion 11, fixing the main body portion 11 to the circuit board 203 can improve the connection stability between the heat sink 10 and the circuit board 203. And by clamping the main body portion 11 with the limiting member 20 and the abutting assembly 30, compared with clamping other parts of the heat sink 10, the vibration amplitude of the heat sink 10 can be minimized to ensure the force transmission for clamping the circuit board 203, reduce the vibration risk and amplitude caused by the deformation of the heat sink 10, and improve the reliability of the heat sink 10 and the circuit board 203.

[0061] In some embodiments, as Figure 3 and Figure 6 shown, the limiting member 20 abuts against both ends of the main body portion 11 along the length direction (X direction) on the side facing away from the mounting surface 2031. Since the heat generating devices 300 at both ends of the main body portion 11 are farther from the main body portion 11 than those at the center of the main body portion 11, the heat generating devices 300 at both ends of the main body portion 11 are not in the best stiffness position, so the stress during vibration of the heat generating devices 300 is relatively large. By abutting the limiting member 20 against both ends of the main body portion 11, the amplitude here can be significantly reduced. In addition, if the limiting member 20 is only provided on one side of the main body portion 11, it is easy to form a rotation axis of the heat sink 10, generating bending stress on the circuit board 203, which in turn causes vibration of the heat sink 10 and the circuit board 203. Therefore, by providing the limiting members 20 on both sides of the main body portion 11, the rotational torque can be balanced, the vibration risk and amplitude caused by the deformation of the heat sink 10 can be reduced, and the stability and reliability of the heat sink 10 and the circuit board 203 can be improved.

[0062] In some embodiments, as Figure 3 , Figure 7 and Figure 8As shown, the main body portion 11 includes a first sub-portion 111, a second sub-portion 112, and a third sub-portion 113. The first sub-portion 111 and the second sub-portion 112 are arranged at intervals. One end of the first sub-portion 111 and the second sub-portion 112 close to the circuit board 203 is fixed to the circuit board 203. The third sub-portion 113 is arranged between the first sub-portion 111 and the second sub-portion 112. One end of the first sub-portion 111 facing away from the circuit board 203 and one end of the second sub-portion 112 facing away from the circuit board 203 are both connected to the third sub-portion 113. There are multiple limiting members 20 and multiple abutting components 30. The multiple limiting members 20 respectively abut against the first sub-portion 111, the second sub-portion 112, and the third sub-portion 113. The multiple abutting components 30 respectively abut against the fixing positions of the first sub-portion 111 and the circuit board 203 and the fixing positions of the second sub-portion 112 and the circuit board 203, so as to clamp the circuit board 203 evenly and stably, reduce the vibration risk and amplitude of the radiator 10 and the circuit board 203, and improve the stability and reliability of the radiator 10 and the circuit board 203.

[0063] In some embodiments, the radiator 10 further includes fins 12. The fins 12 are arranged on the side of the second sub-portion 112 facing away from the first sub-portion 111 and are arranged at one end of the second sub-portion 112 away from the circuit board 203. A part of at least one of the multiple limiting members 20 abuts against the second sub-portion 112, and another part abuts against the fins 12. At least another one of the multiple limiting members 20 abuts against the third sub-portion 113, so that the forces exerted by the limiting members 20 on the second sub-portion 112, the third sub-portion 113, and the fins 12 are evenly distributed on both sides of the second sub-portion 112, thereby balancing the moment of the second sub-portion 112, reducing the vibration risk and amplitude caused by the deformation of the second sub-portion 112, and improving the stability and reliability of the radiator 10 and the circuit board 203.

[0064] It can be understood that the fins 12 can also be arranged on the side of the first sub-portion 111 facing away from the second sub-portion 112 and are arranged at one end of the first sub-portion 111 away from the circuit board 203. A part of at least one of the multiple limiting members 20 abuts against the first sub-portion 111, and another part abuts against the fins 12 connected to the first sub-portion 111. At least another one of the multiple limiting members 20 abuts against the third sub-portion 113, so that the forces exerted by the limiting members 20 on the first sub-portion 111, the third sub-portion 113, and the fins 12 are evenly distributed on both sides of the first sub-portion 111, thereby balancing the moment of the first sub-portion 111, reducing the vibration risk and amplitude caused by the deformation of the first sub-portion 111, and improving the stability and reliability of the radiator 10 and the circuit board 203.

[0065] In some embodiments, such as Figure 3 and Figure 5As shown, the limiting member 20 is a first elastic member 21 with elasticity to resiliently abut against the radiator 10. Exemplarily, the first elastic member 21 is made of an elastic material such as silica gel, rubber, or sponge. Specifically, the first elastic member 21 is a rectangular silica gel pad.

[0066] In some embodiments, as Figure 3 , Figure 7 and Figure 8 shown, the acting force of the first elastic member 21 abutting against the third sub - portion 113 is greater than the acting force of the first elastic member 21 abutting against the fin 12. Since the third sub - portion 113 is connected between the first sub - portion 111 and the second sub - portion 112, compared with the deformation of the fin 12, the deformation of the third sub - portion 113 will have a greater impact on the first sub - portion 111 and the second sub - portion 112. The deformation of the third sub - portion 113 will simultaneously cause the deformation of the first sub - portion 111 and the second sub - portion 112, resulting in the vibration of the main body portion 11 caused by the deformation. Therefore, by making the acting force of the first elastic member 21 abutting against the third sub - portion 113 greater, the third sub - portion 113 is more stable, reducing the vibration risk and amplitude caused by the deformation of the third sub - portion 113, thereby improving the stability and reliability of the main body portion 11 and even the entire radiator 10.

[0067] In some embodiments, as Figure 3 and Figure 5 shown, the first elastic member 21 is adhesively fixed to the radiator 10 to improve the connection strength between the first elastic member 21 and the radiator 10, preventing displacement between the first elastic member 21 and the radiator 10 and resulting in unstable force transmission. Further optionally, the first elastic member 21 is adhesively fixed to the inner surface of the housing 202 to fix the first elastic member 21, thereby improving the stability of the relative position between the radiator 10 and the housing 202.

[0068] In some embodiments, as Figure 2 and Figure 5 shown, the vibration - damping structure 100 further includes a plurality of second elastic members 40 fixed to the side of the circuit board 203 facing away from the radiator 10. The second elastic members 40 have elasticity. The plurality of second elastic members 40 are spaced apart and abut against the side of the circuit board 203 facing away from the radiator 10, and are spaced apart from the abutting assembly 30. The second elastic members 40 are used to abut against the circuit board 203 to reduce the vibration risk and amplitude caused by the deformation of the circuit board 203, thereby improving the stability and reliability of the radiator 10 and the circuit board 203. Exemplarily, the distribution positions of the plurality of second elastic members 40 are mainly based on reducing the rotational torque of the circuit board 203, increasing the supporting area of the circuit board 203, and reducing the elastic deformation amplitude of the circuit board 203. For example, the plurality of second elastic members 40 can be evenly distributed around the perimeter and at the center of the radiator 10 to reduce the rotational torque of the circuit board 203.

[0069] In some embodiments, the second elastic member 40 is adhered to the side of the circuit board 203 facing away from the radiator 10 to enhance the connection strength between the second elastic member 40 and the radiator 10, and avoid unstable force transmission caused by displacement between the second elastic member 401 and the radiator 10. Further optionally, the second elastic member 40 is adhered to the top surface of the battery cell case 201 to fix the second elastic member 40, thereby enhancing the stability of the relative position between the circuit board 203 and the battery cell case 201, and reducing the vibration risk and amplitude of the circuit board 203. Exemplarily, the second elastic member 40 is made of an elastic material such as silica gel, rubber, or sponge. Specifically, the second elastic member 40 is a rectangular silica gel pad.

[0070] In some embodiments, as Figure 6 shown, a first installation groove 2021 is provided on the side of the inner surface of the housing 202 facing the circuit board 203. The first installation groove 2021 is used to install the limiting member 20 and limit the limiting member 20, reducing the risk of the limiting member 20 detaching from the housing 202 or shifting relative to the housing 202, and enhancing the stability of the limiting member 20.

[0071] In some embodiments, as Figures 3 to 5 shown, the supporting portion 311 is integrally formed on the top of the battery cell case 201. A surrounding wall 2011 is further provided on the side of the top of the battery cell case 201 facing the circuit board 203. The surrounding wall 2011 is arranged around the supporting portion 311. A second installation groove 2012 is formed between the surrounding wall 2011 and the supporting portion 311. The second installation groove 2012 is used to install the limiting portion 312 and limit the limiting portion 312, reducing the risk of the limiting portion 312 detaching from the battery cell case 201 or shifting relative to the battery cell case 201, and enhancing the stability of the limiting portion 312.

[0072] In some embodiments, as Figure 5 shown, a third installation groove 2013 is provided on the top of the battery cell case 201. The third installation groove 2013 is used to install the second elastic member 40 and limit the second elastic member 40, reducing the risk of the second elastic member 40 detaching from the battery cell case 201 or shifting relative to the battery cell case 201, and enhancing the stability of the second elastic member 40.

[0073] In addition, those of ordinary skill in the art in this technical field should recognize that the above embodiments are only used to illustrate the present application, rather than to limit the present application. As long as appropriate changes and variations are made to the above embodiments within the scope of the substantial spirit of the present application, they all fall within the scope of the disclosure of the present application.

Claims

1. A damping structure is applied to a circuit board in an energy storage device. The circuit board has a mounting surface, and is characterized in that, The damping structure includes: a radiator, which is arranged on the installation surface; a limiting member, which is fixed on a side of the radiator away from the installation surface and abuts against a surface of the radiator facing away from the installation surface; and a abutting assembly, which is fixed on a side of the circuit board away from the installation surface and abuts against a fixing position of the circuit board and the radiator.

2. The vibration damping structure according to claim 1, wherein: The abutting assembly includes a fixing member and an abutting member. The fixing member is arranged at the fixing position and is configured to fix the circuit board and the radiator. The abutting member is fixed on a side of the circuit board away from the installation surface and abuts against the fixing position.

3. The vibration damping structure according to claim 2, wherein: The fixing member penetrates through the circuit board. One end of the fixing member forms a protruding portion. The protruding portion is located on a side of the circuit board away from the installation surface and abuts against the circuit board. The other end of the fixing member is fixed to the radiator. The abutting member abuts against the protruding portion.

4. The vibration damping structure according to claim 2, characterized in that: One end of the radiator close to the circuit board penetrates through the circuit board. The fixing member fills a gap between one end of the radiator close to the circuit board and the circuit board and connects the circuit board and the radiator. The abutting member abuts against one end of the radiator close to the circuit board.

5. The vibration damping structure according to claim 3, characterized in that: The abutting member includes a supporting portion and a limiting portion. The supporting portion has a supporting surface on a side facing the protruding portion. The supporting surface abuts against the protruding portion. The limiting portion surrounds the supporting portion. The limiting portion has a limiting surface on an inner side facing the supporting portion. The limiting surface and the supporting surface form a limiting groove. The limiting groove accommodates the protruding portion. The limiting surface limits the protruding portion.

6. The vibration damping structure according to claim 5, wherein: The limiting portion has elasticity. The limiting portion abuts against a side of the circuit board facing away from the installation surface.

7. The vibration damping structure according to claim 2, wherein: There are at least two fixing members. Two ends of the side of the radiator fixed to the circuit board along the length direction are respectively fixed to the circuit board through the fixing members.

8. The vibration damping structure according to any one of claims 1 to 7, characterized in that: The radiator has a main body portion. One end of the main body portion close to the circuit board is fixed to the circuit board. One end of the main body portion facing away from the installation surface is for at least part of the limiting member to abut against. The abutting assembly abuts against the fixing position of the circuit board and the main body portion.

9. The damping structure according to claim 8, wherein: The limiting member abuts against two ends of the side of the main body portion facing away from the installation surface along the length direction.

10. The vibration damping structure according to claim 8, wherein: The main body portion includes a first sub-portion, a second sub-portion and a third sub-portion. The first sub-portion and the second sub-portion are arranged at intervals. One ends of the first sub-portion and the second sub-portion close to the circuit board are both fixed to the circuit board. The third sub-portion is arranged between the first sub-portion and the second sub-portion. One ends of the first sub-portion and the second sub-portion facing away from the circuit board are both connected to the third sub-portion. There are multiple limiting members and multiple abutting assemblies. The multiple limiting members respectively abut against the first sub-portion, the second sub-portion and the third sub-portion. The multiple abutting assemblies respectively abut against the fixing positions of the first sub-portion and the circuit board and the fixing positions of the second sub-portion and the circuit board.

11. The vibration damping structure according to claim 10, wherein: The radiator further includes fins, the fins are connected to a side of the second sub - part facing away from the first sub - part, and are arranged at an end of the second sub - part away from the circuit board. At least a part of at least one of the plurality of limiting members abuts against the second sub - part, and another part abuts against the fins. At least another one of the plurality of limiting members abuts against the third sub - part.

12. The damping structure according to claim 11, wherein: The limiting member is a first elastic member, and the acting force of the first elastic member abutting against the third sub - part is greater than the acting force of the first elastic member abutting against the fins.

13. The vibration damping structure according to claim 12, characterized in that: The first elastic member is fixedly adhered to the radiator.

14. The vibration damping structure according to any one of claims 1 to 7, characterized in that: The damping structure further includes a plurality of second elastic members fixed to a side of the circuit board facing away from the radiator. The plurality of second elastic members are arranged at intervals and abut against a surface of the circuit board facing away from the radiator, and are arranged at intervals from the abutting assembly.

15. The damping structure according to claim 14, characterized in that: The second elastic member is adhered to a surface of the circuit board facing away from the radiator.

16. An energy storage device, characterized in that: The energy storage device includes a battery cell case, a housing, a circuit board, and a damping structure according to any one of claims 1 to 15. The battery cell case is arranged inside the housing, the circuit board is arranged between the battery cell case and the housing, the limiting member is arranged on a side of the housing facing the circuit board, and the abutting assembly is arranged on a side of the battery cell case facing the circuit board.

17. The energy storage device according to claim 16, wherein: A first mounting groove is provided on a side of the housing facing the circuit board, and a second mounting groove is provided on a side of the battery cell case facing the circuit board. The first mounting groove is used for mounting the limiting member, and the second mounting groove is used for mounting the abutting assembly.

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