Battery pack and electric device

Abstract

The utility model discloses a battery pack and electric device belong to battery pack technical field. The battery pack includes the shell and the explosion -proof valve, and the explosion -proof valve is connected in the shell, and the explosion -proof valve includes the valve body, and the valve body fixedly connected in the shell, and the first through -hole and the pressure relief hole are set up on the valve body, and the second through -hole is set up on the shell, and the pressure relief hole is at least partially arranged opposite the second through -hole to provide the pressure relief passage for the battery pack, and the dynamic core is set up on the side of the valve body away from the shell, and is at least partially abuts on the shell, and the dynamic core covers the pressure relief hole and the second through -hole, and the dynamic core includes the dynamic core body and the adjustable connecting shaft, and the adjustable connecting shaft is connected on the side of the dynamic core body close to the valve body, and the adjustable connecting shaft is set up in the first through -hole and the second through -hole, and the adjusting part is adjustably connected on the end of the adjustable connecting shaft and extends into the shell, and the elastic part is sleeved on the adjustable connecting shaft, and the elastic part is set up between the valve body and the adjusting part, and one end of the elastic part abuts on the valve body, and the other end abuts on the adjusting part.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, specifically to a battery pack and an electrical device. Background Technology

[0002] As a core component of new energy vehicles, the safety of battery packs has received widespread attention in the industry. Battery packs are equipped with explosion-proof valves. In the event of thermal runaway, the explosion-proof valves activate to promptly remove flammable materials and prevent serious casualties and property damage.

[0003] In related technologies, explosion-proof valves are equipped with springs to control their opening and closing. However, the inconsistent stiffness coefficient of these springs makes precise control of the valve's opening difficult. Utility Model Content

[0004] This utility model discloses a battery pack and an electrical device to solve, or at least partially solve, the problem in the prior art where the opening of the explosion-proof valve of the battery pack is difficult to control precisely.

[0005] To solve the above-mentioned technical problems, this utility model is implemented as follows:

[0006] In a first aspect, this utility model discloses a battery pack, comprising a housing and an explosion-proof valve. The explosion-proof valve is connected to the housing and includes a valve body fixedly connected to the housing. The valve body has a first through hole and a pressure relief hole spaced apart. The housing has a second through hole, and the pressure relief hole is at least partially opposite to the second through hole to provide a pressure relief channel for the battery pack. A moving core is disposed on the side of the valve body away from the housing and at least partially abuts against the housing, covering the pressure relief... The moving core includes a moving core body and an adjustable connecting shaft, the adjustable connecting shaft being connected to the moving core body near the valve body, and the adjustable connecting shaft passing through the first through hole and the second through hole; an adjusting member, the adjusting member being adjustablely connected to the end of the adjustable connecting shaft extending into the housing; and an elastic member, the elastic member being sleeved on the adjustable connecting shaft, the elastic member being disposed between the adjusting members of the valve body, and one end of the elastic member abutting against the valve body, and the other end abutting against the adjusting member.

[0007] Optionally, the adjustable connecting shaft includes a first connecting shaft and a second connecting shaft. The first connecting shaft is fixedly connected to one side of the moving core body, and the second connecting shaft is at least partially sleeved on the first connecting shaft and is adjustablely connected to the first connecting shaft along the axial direction of the first connecting shaft.

[0008] Optionally, the adjusting element includes a nut that is threaded onto the end of the adjustable connecting shaft that extends into the housing.

[0009] Optionally, the explosion-proof valve further includes a housing, which is sleeved on the end of the adjustable connecting shaft that extends into the outer shell and the nut. At least one adjustment hole is provided on the side wall of the housing, and the nut is at least partially exposed in the adjustment hole.

[0010] Optionally, the adjustment holes include a plurality of holes, which are spaced apart circumferentially along the housing.

[0011] Optionally, along the axial direction of the adjustable connecting shaft, the thickness of the nut is L1mm and the length of the adjusting hole is L2mm, satisfying L2 / L1≥2.

[0012] Optionally, the first through hole is located in the middle region of the valve body, and the pressure relief hole includes a plurality of holes, which are spaced apart on the outer periphery of the first through hole.

[0013] Optionally, the valve body is further provided with a plurality of first mounting holes, and the plurality of first mounting holes and the plurality of pressure relief holes are alternately arranged on the outer periphery of the first through hole; the explosion-proof valve further includes a fixing member, which passes through the first mounting hole and the outer shell to detachably connect the valve body to the outer shell.

[0014] Optionally, the moving core body includes a base plate and a side plate connected to one side of the base plate. The adjustable connecting shaft is connected to the base plate, and the adjustable connecting shaft and the side plate are located on the same side of the base plate. The base plate covers the pressure relief hole and the second through hole. The side plate abuts against the outer casing, and a groove is provided at the end of the side plate away from the base plate. The battery pack also includes a sealing ring, which is embedded in the groove and at least partially exposed outside the groove to seal the gap between the moving core and the outer casing.

[0015] Optionally, the housing extends at least partially into the second through hole and has a first gap between it and the second through hole; the pressure relief hole is at least partially disposed opposite to the first gap to provide a pressure relief channel for the battery pack.

[0016] Secondly, this utility model discloses an electrical device, which includes an electrical device body and the battery pack described in the first aspect, wherein the battery pack is connected to the electrical device body.

[0017] This utility model discloses a battery pack and an electrical device. The battery pack includes a shell and an explosion-proof valve. The explosion-proof valve is connected to the shell and includes a valve body fixedly connected to the shell. The valve body has a first through hole and a pressure relief hole spaced apart. The shell has a second through hole, and the pressure relief hole is at least partially opposite to the second through hole to provide a pressure relief channel for the battery pack. A moving core is located on the side of the valve body away from the shell and at least partially abuts against the shell. The moving core covers the pressure relief hole. The moving core includes a moving core body and an adjustable connecting shaft, the adjustable connecting shaft being connected to the moving core body near the valve body, and the adjustable connecting shaft passing through the first through hole and the second through hole; an adjusting member, the adjusting member being adjustablely connected to the end of the adjustable connecting shaft extending into the housing; and an elastic member, the elastic member being sleeved on the adjustable connecting shaft, the elastic member being disposed between the adjusting members of the valve body, and one end of the elastic member abutting against the valve body, and the other end abutting against the adjusting member.

[0018] The battery pack disclosed in this utility model includes a shell and an explosion-proof valve. The explosion-proof valve is connected to the shell, and a valve body is fixedly connected to the shell to secure the explosion-proof valve. A first through hole and a pressure relief hole are spaced apart on the valve body. A second through hole is provided on the shell, and the pressure relief hole is at least partially opposite to the second through hole to provide a pressure relief channel for the battery pack. A moving core is located on the side of the valve body away from the shell, and at least partially abuts against the shell. The moving core includes a moving core body and an adjustable connecting shaft. The adjustable connecting shaft is connected to the side of the moving core body near the valve body, and its length is adjustable. The adjustable connecting shaft passes through the first through hole of the valve body and the second through hole of the shell, extending at least partially into the shell. An adjusting member is located inside the shell and is adjustablely connected to the end of the adjustable connecting shaft that extends into the shell. An elastic member is sleeved on the adjustable connecting shaft and is located between the valve body and the adjusting member. One end of the elastic member abuts against the valve body, and the other end abuts against the adjusting member. The position of the adjusting element relative to the adjustable connecting shaft is adjustable, as is the length of the adjustable connecting shaft. When the adjusting element is connected to different positions on the adjustable connecting shaft, or when the length of the adjustable connecting shaft is different, the clamping force applied by the adjusting element to the elastic element also varies. Different levels of clamping force can regulate the opening pressure of the explosion-proof valve, making the opening pressure range of the explosion-proof valve wider and applicable to more types of battery packs. Therefore, during battery pack installation, the opening pressure of the explosion-proof valve can be adjusted by adjusting the position of the adjusting element on the adjustable connecting shaft, or by adjusting the length of the adjustable connecting shaft. This configuration allows for adjustable opening pressure of the explosion-proof valve, facilitating precise control of its opening. Attached Figure Description

[0019] Figure 1This diagram illustrates the structure of the explosion-proof valve described in this embodiment of the invention. Figure 1 ;

[0020] Figure 2 This diagram illustrates the structure of the explosion-proof valve described in this embodiment of the invention. Figure 2 ;

[0021] Figure 3 This diagram illustrates the structure of the explosion-proof valve described in this embodiment of the invention. Figure 3 ;

[0022] Figure 4 This diagram shows an exploded view of the explosion-proof valve described in an embodiment of this utility model.

[0023] Figure 5 This is a cross-sectional view of the explosion-proof valve described in an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram showing the structure of the battery pack casing in an embodiment of the present invention.

[0025] Figure label:

[0026] 10: Moving core; 11: Adjustable connecting shaft; 111: First connecting shaft; 112: Second connecting shaft; 12: Base plate; 13: Side plate; 14: Groove; 15: Moving core body;

[0027] 20: Valve body; 21: First through hole; 22: Pressure relief hole; 23: First mounting hole;

[0028] 30: Housing; 31: Adjustment hole;

[0029] 40: Adjusting parts;

[0030] 50: Elastic component;

[0031] 60: Sealing ring;

[0032] 70: Outer shell; 71: Second through hole;

[0033] 80: Fasteners. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the fixed scope of the present utility model.

[0035] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0036] Reference Figure 1 The diagram shows the structure of the explosion-proof valve described in the embodiment of this utility model. Figure 1 ;reference Figure 2 The diagram shows the structure of the explosion-proof valve described in the embodiment of this utility model. Figure 2 ;reference Figure 3 The diagram shows the structure of the explosion-proof valve described in the embodiment of this utility model. Figure 3 ;reference Figure 4 An exploded view of the explosion-proof valve described in an embodiment of this utility model is shown; refer to Figure 5 A cross-sectional view of the explosion-proof valve described in an embodiment of this utility model is shown; see reference to Figure 6 The diagram shows a schematic diagram of the structure of the battery pack casing in an embodiment of the present invention.

[0037] like Figures 1 to 6 As shown in the figure, this utility model embodiment discloses a battery pack, which includes a housing 70 and an explosion-proof valve. The explosion-proof valve is connected to the housing 70 and includes a valve body 20, which is fixedly connected to the housing 10. The valve body 20 is provided with a first through hole 21 and a pressure relief hole 22 at intervals. The housing 70 is provided with a second through hole 71, and the pressure relief hole 22 is at least partially opposite to the second through hole 71 to provide a pressure relief channel for the battery pack. A moving core 10 is provided on the side of the valve body 20 away from the housing 70 and at least partially abuts against the housing 70. The moving core 10 covers the pressure relief hole 22. 2. The moving core 10 includes a moving core body 15 and an adjustable connecting shaft 11. The adjustable connecting shaft 11 is connected to the side of the moving core body 15 near the valve body 20. The adjustable connecting shaft 11 passes through the first through hole 21 and the second through hole 71. The adjusting member 40 is adjustablely connected to the end of the adjustable connecting shaft 11 that extends into the housing 70. The elastic member 50 is sleeved on the adjustable connecting shaft 11. The elastic member 50 is disposed between the valve body 20 and the adjusting member 40, and one end of the elastic member 50 abuts against the valve body 20 and the other end abuts against the adjusting member 40.

[0038] This utility model discloses a battery pack, which includes a housing 70 and an explosion-proof valve installed on the housing 70. When the battery pack experiences thermal runaway, the explosion-proof valve will activate to promptly discharge the flammable ejecta from the battery pack, release the pressure inside the battery pack, improve the safety of the battery pack, and prevent the battery pack from exploding or causing serious casualties and property damage.

[0039] like Figure 6 As shown, the battery pack disclosed in this embodiment of the present invention includes a housing 70 and an explosion-proof valve, the explosion-proof valve being connected to the housing 70. Figure 4 As shown, the explosion-proof valve includes a moving core 10, a valve body 20, an adjusting element 40, and an elastic element 50. The valve body 20 is fixedly connected to the outer casing 70 of the battery pack. This fixed connection means that the valve body 20 is fixed relative to the outer casing 70, and there is no relative movement between the valve body 20 and the outer casing 70. Exemplarily, the valve body 20 is detachably connected to the outer casing 70 by bolts, or the valve body 20 is welded to the outer casing 70. Of course, in this embodiment of the invention, there are no excessive restrictions on the specific connection method between the valve body 20 and the outer casing 70. In practical applications, those skilled in the art can choose a suitable connection method as needed.

[0040] The valve body 20 is provided with a first through hole 21 and a pressure relief hole 22 at intervals, and the outer shell 70 is provided with a second through hole 71. The pressure relief hole 22 is at least partially opposite to the second through hole 71 to provide a pressure relief channel for the battery pack, so that the combustion ejecta of the battery pack can be ejected from the battery pack from the second through hole 71 and the pressure relief hole 22.

[0041] The moving core 10 is disposed on the side of the valve body 20 away from the outer casing 70, and the moving core 10 at least partially abuts against the outer casing 70. The moving core 10 covers the pressure relief hole 22 and the second through hole 71 to seal the battery pack. Exemplarily, the moving core 10 includes a substrate 12 and a side plate 13 connected around the substrate 12. The substrate 12 is disposed on the side of the valve body 20 away from the outer casing 70, and the substrate 12 covers the pressure relief hole 22 and the second through hole 71. The side plate 13 surrounds the valve body 20, and the end of the side plate 13 away from the substrate 12 abuts against the outer casing 70 to seal the battery pack.

[0042] The moving core 10 includes a moving core body 15 and an adjustable connecting shaft 11 connected to the moving core body 15 near the valve body 20. The length of the adjustable connecting shaft 11 is adjustable. The adjustable connecting shaft 11 passes through the first through hole 21 and the second through hole 71, and at least partially extends into the housing 70. The adjusting member 40 is located inside the housing 70 and is adjustablely connected to the end of the adjustable connecting shaft 11 that extends into the housing 70.

[0043] In this embodiment of the invention, the length of the adjustable connecting shaft 11 along its axial direction is adjustable.

[0044] It should be noted that the adjusting element 40 in this embodiment can be a nut or a snap-fit. In this embodiment, no particular restrictions are placed on the specific type of the adjusting element 40. In practical applications, those skilled in the art can choose according to their needs.

[0045] like Figures 1 to 4 As shown, in this embodiment, the elastic element 50 is sleeved on the adjustable connecting shaft 11, and the elastic element 50 is disposed between the valve body 10 and the adjusting element 40. One end of the elastic element 50 abuts against the valve body 20, and the other end abuts against the adjusting element 40. When the adjusting element 40 is connected to different positions on the adjustable connecting shaft 11, the clamping force applied by the adjusting element 40 to the elastic element 50 is also different. Different degrees of clamping force can adjust the opening pressure of the explosion-proof valve, making the opening pressure range of the explosion-proof valve wider, and the explosion-proof valve can be applied to more types of battery packs. Therefore, during the battery pack installation process, the position of the adjusting element 40 connected to the adjustable connecting shaft 11 can be adjusted through the adjusting hole 31 to adjust the opening pressure of the explosion-proof valve. Through the above settings, the opening pressure of the explosion-proof valve can be adjusted to facilitate precise control of the opening of the explosion-proof valve.

[0046] Furthermore, the opening pressure of the explosion-proof valve varies depending on the extension length of the adjustable connecting shaft 11. By adjusting the extension length of the adjustable connecting shaft 11, the opening pressure of the explosion-proof valve can be adjusted, thus broadening its opening pressure range and making it suitable for more types of battery packs. Therefore, during battery pack installation, the opening pressure of the explosion-proof valve can be adjusted by changing the extension length of the adjustable connecting shaft 11. This adjustment allows for precise control of the explosion-proof valve's opening pressure.

[0047] It should be noted that the elastic element 50 in this embodiment can be a spring or an elastic plastic part. In this embodiment, no restrictions are placed on the specific parameters or material of the elastic element 50. In practical applications, those skilled in the art can choose according to their needs.

[0048] It should be noted that when the explosion-proof valve is installed on the outer casing 70 of the battery pack, the moving core 10 covers the outside of the valve body 20, and the moving core 10 can abut against the outer casing 70 of the battery pack to seal the battery pack. When the battery pack experiences thermal runaway, the combustion ejecta from the battery pack can be ejected through the second through hole 71 and the pressure relief hole 22 to the moving core 10, applying pressure to the moving core 10. When the pressure applied by the combustion ejecta is sufficiently large, the moving core 10 separates from the outer casing 70 of the battery pack, and the combustion ejecta inside the battery pack flows out, thereby avoiding the risk of battery pack explosion and improving the safety of the battery pack.

[0049] The battery pack disclosed in this utility model includes a housing 70 and an explosion-proof valve. The explosion-proof valve is connected to the housing 70, and a valve body 20 is fixedly connected to the housing 70 to fix the explosion-proof valve to the housing 70. The valve body 20 is provided with a first through hole 21 and a pressure relief hole 22 at intervals. The housing 70 is provided with a second through hole 71. The pressure relief hole 22 is at least partially opposite to the second through hole 71 to provide a pressure relief channel for the battery pack. A moving core 10 is provided on the side of the valve body 20 away from the housing 30, and the moving core 10 at least partially abuts against the housing 70. The moving core 10 covers the pressure relief hole 11 and the second through hole 71. The moving core 10 includes a moving core body 15 and an adjustable connecting shaft 11. The adjustable connecting shaft 11 is connected to the moving core body 15 on the side closer to the valve body 20. The length of the adjustable connecting shaft 11 can be adjusted. The adjustable connecting shaft 11 passes through the first through hole 21 of the valve body 20 and the second through hole 71 of the housing 70, and at least partially extends into the housing 70. The adjusting member 40 is located inside the housing 70 and is adjustablely connected to the end of the adjustable connecting shaft 11 that extends into the housing 70. The elastic member 50 is sleeved on the adjustable connecting shaft 11 and is positioned between the valve body 20 and the adjusting member 40. One end of the elastic member 50 abuts against the valve body 20, and the other end abuts against the adjusting member 40. The position of the adjusting member relative to the adjustable connecting shaft is adjustable, as is the length of the adjustable connecting shaft. When the adjusting member 40 is connected to different positions on the adjustable connecting shaft 11, or when the length of the adjustable connecting shaft 11 is different, the clamping force applied by the adjusting member 40 to the elastic member 50 is also different. Different levels of clamping force can regulate the opening pressure of the explosion-proof valve, making the opening pressure range of the explosion-proof valve wider and applicable to more types of battery packs. Therefore, during battery pack installation, the opening pressure of the explosion-proof valve can be adjusted by adjusting the position of the adjusting member 40 on the adjustable connecting shaft 11, or by adjusting the length of the adjustable connecting shaft 11. The above settings allow for adjustment of the opening pressure of the explosion-proof valve, enabling precise control of its opening.

[0050] As an alternative implementation method, such as Figure 5 As shown, the adjustable connecting shaft 11 includes a first connecting shaft 111 and a second connecting shaft 112. The first connecting shaft 111 is fixedly connected to one side of the moving core 10, and the second connecting shaft 112 is at least partially sleeved on the first connecting shaft 111 and is adjustablely connected to the first connecting shaft 111 along the axial direction of the first connecting shaft 111.

[0051] like Figure 5 As shown, the adjustable connecting shaft 11 includes a first connecting shaft 111 and a second connecting shaft 112. The first connecting shaft 111 is fixedly connected to the side of the moving core 10 near the valve body 20. Exemplarily, the first connecting shaft 111 is integrally formed with the moving core 10, and the first connecting shaft 111 is welded to the side of the moving core 10 near the valve body 20.

[0052] For example, along the axial direction of the second connecting shaft 112, a blind hole is provided inside the second connecting shaft 112, and an internal thread is provided on the side wall of the blind hole. An external thread is provided on the outer wall of the first connecting shaft 111, and the internal thread is threaded to the external thread, so as to drive the second connecting shaft 112 to move relative to the first connecting shaft 111 along the axial direction of the first connecting shaft 111, thereby adjusting the length of the adjustable connecting shaft 11.

[0053] By adjusting the length of the adjustable connecting shaft 11, the opening pressure of the explosion-proof valve can be adjusted, thus expanding the opening pressure range and making the explosion-proof valve suitable for more types of battery packs. In other words, through the above settings, the opening pressure of the explosion-proof valve can be adjusted for precise control of its opening.

[0054] As an alternative implementation method, such as Figures 1 to 4 As shown, the adjusting member 40 includes a nut that is threadedly connected to the end of the adjustable connecting shaft 11 that extends into the housing 70.

[0055] In this embodiment of the invention, the adjusting member 40 is set as a nut, which is threaded to the end of the adjustable connecting shaft 11 that extends into the housing 70, so as to adjust the opening pressure of the explosion-proof valve, so that the opening pressure range of the explosion-proof valve is larger and the explosion-proof valve can be applied to more types of battery packs.

[0056] As an alternative implementation method, such as Figures 1 to 4 As shown, the explosion-proof valve also includes a housing 30, which is sleeved on the end of the adjustable connecting shaft 11 that extends into the outer casing 70 and on a nut. At least one adjustment hole 31 is provided on the side wall of the housing 30, and the nut is at least partially exposed in the adjustment hole 31.

[0057] In this embodiment of the present invention, the housing 30 is sleeved on the end of the adjustable connecting shaft 11 that extends into the housing 70 and on the nut, and at least one adjusting hole 31 is provided on the side wall of the housing 30. The nut is at least partially exposed in the adjusting hole 31 so as to adjust the position of the nut connected to the adjustable connecting shaft 11 through the adjusting hole 31, thereby facilitating the adjustment of the opening pressure of the explosion-proof valve.

[0058] As an alternative implementation method, such as Figure 2 and Figure 4 As shown, the adjustment holes 31 in this embodiment of the present invention include a plurality of holes, which are spaced apart along the circumference of the housing 30.

[0059] In this embodiment of the utility model, such as Figure 2 and Figure 4As shown, multiple adjustment holes 31 are provided on the side wall of the housing 30, and the multiple adjustment holes 31 are arranged at intervals along the circumference of the housing 30. The position of the nut connected to the adjustable connecting shaft 11 is adjusted through the multiple adjustment holes 31 to facilitate the operator to adjust the opening pressure of the explosion-proof valve. Furthermore, the multiple adjustment holes 31 facilitate the adjustable connection of the nut to the adjustable connecting shaft 11 to facilitate the installation of the explosion-proof valve.

[0060] For example, two adjustment holes 31 can be provided on the side wall of the housing 30. The two adjustment holes 31 are arranged at intervals along the circumference of the housing 30, and the two adjustment holes 31 are at least partially opposite to each other. Of course, in this embodiment of the present invention, there is no excessive limitation on the specific number of adjustment holes 31. In practical applications, those skilled in the art can set them as needed.

[0061] As an alternative implementation method, such as Figure 1 , Figure 2 and Figure 4 As shown, along the axial direction of the adjustable connecting shaft 11, the thickness of the nut is L1 mm, and the length of the adjusting hole 31 is L2 mm, satisfying L2 / L1≥2.

[0062] In this embodiment of the utility model, such as Figure 1 , Figure 2 and Figure 4 As shown, along the axial direction of the adjustable connecting shaft 11, the thickness of the nut is set to L1 mm, and the length of the adjusting hole 31 is set to L2 mm, satisfying L2 / L1≥2. That is, along the axial direction of the adjustable connecting shaft 11, the length of the adjusting hole 31 is at least twice the thickness of the nut. This ensures that the adjustable position of the nut on the adjustable connecting shaft 11 is sufficiently large, thereby expanding the range of the explosion-proof valve's starting pressure and allowing the explosion-proof valve to be applied to more types of battery packs.

[0063] For example, along the axial direction of the adjustable connecting shaft 11, the length of the adjusting hole 31 can be set to 2 times, 2.2 times, 2.5 times, 2.7 times, 3 times, 3.2 times, 3.5 times, etc., the thickness of the nut.

[0064] As an alternative implementation method, such as Figure 4 As shown, in this embodiment of the present invention, the first through hole 21 is disposed in the middle region of the valve body 20, and the pressure relief hole 22 includes a plurality of holes, which are spaced apart on the outer periphery of the first through hole 21.

[0065] like Figure 4 As shown, in this embodiment of the present invention, the valve body 20 is provided with a first through hole 21 and a plurality of pressure relief holes 22. The first through hole 21 is provided in the middle region of the valve body 20, and the plurality of pressure relief holes 22 are arranged at intervals along the circumference of the valve body 20 and surround the outer periphery of the first through hole 21.

[0066] In this embodiment of the invention, multiple pressure relief holes 22 are spaced apart on the outer periphery of the first through hole 21, with each pressure relief hole 22 corresponding to a different region of the moving core 10. When the battery pack experiences thermal runaway, the combustion ejecta from the battery pack can be ejected through the multiple pressure relief holes 22 to different regions of the moving core 10, applying pressure to those regions. When the pressure exerted by the combustion ejecta on a region of the moving core 10 is sufficiently high, the moving core 10 will separate from the battery pack casing 70, causing the combustion ejecta inside the battery pack casing 70 to flow out, thereby further improving the safety of the battery pack and avoiding risks such as battery pack explosion.

[0067] As an alternative implementation method, such as Figure 4 As shown, the valve body 20 in this embodiment of the present invention is also provided with a plurality of first mounting holes 23, and the plurality of first mounting holes 23 and a plurality of pressure relief holes 22 are alternately arranged on the outer periphery of the first through hole 21; the explosion-proof valve also includes a fixing member 80, which passes through the first mounting hole 23 and the outer shell 70 to detachably connect the valve body 20 to the outer shell 70.

[0068] like Figure 4 As shown in the embodiment of this utility model, a plurality of first mounting holes 23 are provided on the valve body 20. The plurality of first mounting holes 23 surround the outer periphery of the first through hole 21, and the plurality of first mounting holes 23 and the plurality of pressure relief holes 22 are alternately spaced along the circumference of the valve body 20. The fixing member 80 passes through the first mounting holes 23 and the outer shell 70, so as to detachably connect the valve body 20 to the outer shell 70 of the battery pack through the fixing member 70, so as to fix the valve body 20 to the outer shell 70 of the battery pack.

[0069] For example, the fastener 80 disclosed in this embodiment of the utility model can be a bolt. The bolt 80 includes a plurality of bolts, each bolt being provided with a corresponding first mounting hole 23. Each bolt is inserted into a first mounting hole 23 and connected to the outer shell 70, thereby the valve body 20 is detachably connected to the outer shell 70 of the battery pack through the fastener 70.

[0070] In this embodiment of the invention, a plurality of first mounting holes 23 are provided on the valve body 20. The plurality of first mounting holes 23 surround the outer periphery of the first through hole 21, and the plurality of first mounting holes 23 and the plurality of pressure relief holes 22 are alternately spaced along the circumference of the valve body 20. Fixing members 80 are inserted through the first mounting holes 23 and the outer shell 70, and the valve body 20 is detachably connected to the outer shell 70 of the battery pack through the plurality of fixing members 80, thereby improving the reliability of the connection between the valve body 20 and the outer shell 70 of the battery pack, making the connection between the valve body 20 and the outer shell 70 of the battery pack more stable and reliable.

[0071] As an alternative implementation method, such as Figure 4As shown, the moving core 10 in this embodiment includes a substrate 12 and a side plate 13 connected to one side of the substrate 12. An adjustable connecting shaft 11 is connected to the substrate 12, and the adjustable connecting shaft 11 and the side plate 13 are located on the same side of the substrate 12. The substrate 12 covers the pressure relief hole 22 and the second through hole 71. The side plate 13 abuts against the outer shell 70, and a groove 14 is provided at the end of the side plate 13 away from the substrate 12. The battery pack also includes a sealing ring 60, which is embedded in the groove 14 and at least partially exposed to seal the gap between the moving core 10 and the outer shell 70.

[0072] like Figure 4 As shown, the moving core 10 in this embodiment includes a base plate 12 and a side plate 13 connected to one side of the base plate 12. An adjustable connecting shaft 11 is connected to the base plate 12 and is located on the same side of the base plate 12 as the side plate 13. The base plate 12 covers the pressure relief hole 22 and the second through hole 71. This arrangement allows the base plate 12 to be positioned on the side of the valve body 20 away from the outer casing 70. The base plate 12 covers the pressure relief hole 22 and the second through hole 71. The side plate 13 can surround the outer periphery of the valve body 20, and the end of the side plate 13 away from the base plate 12 can abut against the outer casing 70 to seal the battery pack.

[0073] The groove 14 is located at the end of the side plate 13 away from the substrate 12. A portion of the sealing ring 60 is located in the groove 14 to fix the sealing ring 60. The other portion of the sealing ring 60 is exposed outside the side plate 13 so that the sealing ring 60 can abut against the outer shell 70 of the battery pack to seal the battery pack.

[0074] As an alternative implementation method, such as Figure 1 As shown, in this embodiment of the present invention, the outer shell 70 is provided with a second through hole 71, the shell 30 extends into the second through hole 71, and there is a first gap between the shell 30 and the second through hole 71.

[0075] like Figure 1 As shown in this embodiment of the invention, the outer shell 70 of the battery pack is provided with a second through hole 71, and a portion of the shell 30 extends into the second through hole 71, with a first gap existing between the shell 30 and the second through hole 71. This first gap allows the combustion ejecta from the battery pack to pass through the first gap and reach the outside of the outer shell 70 in the event of thermal runaway, thereby releasing the pressure inside the battery pack and preventing explosions and other dangers that could cause significant personal injury or property damage.

[0076] As an alternative implementation method, such as Figure 1 As shown, in this embodiment of the present invention, the pressure relief hole 22 is at least partially disposed opposite to the first gap to provide a pressure relief channel for the battery pack.

[0077] like Figure 1As shown in the embodiment of this utility model, the pressure relief hole 22 is at least partially disposed opposite to the first gap. When the battery pack experiences thermal runaway, the combustion ejecta from the battery pack can pass through the first gap and the pressure relief hole 22 in sequence, reaching the moving core 10 more quickly, applying pressure to the moving core 10, causing the moving core 10 to detach, and allowing the combustion ejecta inside the battery pack casing 70 to flow out, thereby avoiding the risk of battery pack explosion and improving the safety of the battery pack.

[0078] This utility model discloses a battery pack, which includes a shell and an explosion-proof valve. The explosion-proof valve is connected to the shell and includes a valve body fixedly connected to the shell. The valve body has a first through hole and a pressure relief hole spaced apart. The shell has a second through hole, and the pressure relief hole is at least partially opposite to the second through hole to provide a pressure relief channel for the battery pack. A moving core is located on the side of the valve body away from the shell and at least partially abuts against the shell, covering the pressure relief. The moving core includes a moving core body and an adjustable connecting shaft, the adjustable connecting shaft being connected to the moving core body on the side near the valve body, and the adjustable connecting shaft passing through the first through hole and the outer shell; an adjusting member, the adjusting member being adjustablely connected to the end of the adjustable connecting shaft extending into the outer shell; and an elastic member, the elastic member being sleeved on the adjustable connecting shaft, the elastic member being disposed between the adjusting members of the valve body, and one end of the elastic member abutting against the valve body, and the other end abutting against the adjusting member.

[0079] The battery pack disclosed in this embodiment of the utility model includes a shell and an explosion-proof valve. The explosion-proof valve is connected to the shell, and a valve body is fixedly connected to the shell to secure the explosion-proof valve. The valve body has a first through hole and a pressure relief hole spaced apart. The shell has a second through hole, and the pressure relief hole is at least partially opposite to the second through hole to provide a pressure relief channel for the battery pack. A moving core is located on the side of the valve body away from the shell, and at least partially abuts against the shell. The moving core includes a moving core body and an adjustable connecting shaft. The adjustable connecting shaft is connected to the side of the moving core body near the valve body, and its length is adjustable. The adjustable connecting shaft passes through the first through hole of the valve body and the second through hole of the shell, and at least partially extends into the shell. An adjusting member is located inside the shell and is adjustablely connected to the end of the adjustable connecting shaft that extends into the shell. An elastic member is sleeved on the adjustable connecting shaft and is located between the valve body and the adjusting member. One end of the elastic member abuts against the valve body, and the other end abuts against the adjusting member. The position of the adjusting element relative to the adjustable connecting shaft is adjustable, as is the length of the adjustable connecting shaft. When the adjusting element is connected to different positions on the adjustable connecting shaft, or when the length of the adjustable connecting shaft is different, the clamping force applied by the adjusting element to the elastic element also varies. Different levels of clamping force can regulate the opening pressure of the explosion-proof valve, making the opening pressure range of the explosion-proof valve wider and applicable to more types of battery packs. Therefore, during battery pack installation, the opening pressure of the explosion-proof valve can be adjusted by adjusting the position of the adjusting element on the adjustable connecting shaft, or by adjusting the length of the adjustable connecting shaft. This configuration allows for adjustable opening pressure of the explosion-proof valve, facilitating precise control of its opening.

[0080] This utility model embodiment also discloses an electrical device, which includes an electrical device body and a battery pack as described in the above embodiment, wherein the battery pack is connected to the electrical device body.

[0081] This utility model embodiment also discloses an electrical device, which includes an electrical device body and the battery pack described in the above embodiment. When the battery pack experiences thermal runaway, the explosion-proof valve will activate to promptly discharge the combustion ejecta from the battery pack, release the pressure inside the battery pack, and prevent the battery pack from exploding, thus avoiding serious casualties and property damage, and improving the safety of the electrical device.

[0082] It should be noted that the battery pack included in this embodiment of the present invention has the same structure as the battery pack described in the above embodiments, and its beneficial effects are also the same or similar. Further details will not be repeated here.

[0083] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0084] Although alternative embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make further changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the alternative embodiments as well as all changes and modifications falling within the scope of the present invention.

[0085] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used merely to distinguish one entity from another, and do not necessarily require or imply any such actual relationship or order between these entities. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the article or terminal device that includes that element.

[0086] The technical solution provided by this utility model has been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the principle and implementation of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A battery pack comprising a housing (70) and an explosion-proof valve connected to the housing (70), characterized in that, The explosion-proof valve includes: A valve body (20) is fixedly connected to the outer shell (70). The valve body (20) is provided with a first through hole (21) and a pressure relief hole (22) spaced apart. The outer shell (70) is provided with a second through hole (71). The pressure relief hole (22) is at least partially opposite to the second through hole (71) to provide a pressure relief channel for the battery pack. A moving core (10) is disposed on the side of the valve body (20) away from the outer casing (70) and at least partially abuts against the outer casing (70). The moving core (10) covers the pressure relief hole (22) and the second through hole (71). The moving core (10) includes a moving core body (15) and an adjustable connecting shaft (11). The adjustable connecting shaft (11) is connected to the side of the moving core body (15) near the valve body (20). The adjustable connecting shaft (11) passes through the first through hole (21) and the second through hole (71). Adjusting member (40), which is adjustablely connected to the end of the adjustable connecting shaft (11) that extends into the housing (70); An elastic element (50) is sleeved on the adjustable connecting shaft (11). The elastic element (50) is disposed between the valve body (20) and the adjusting element (40), with one end of the elastic element (50) abutting against the valve body (20) and the other end abutting against the adjusting element (40).

2. The battery pack according to claim 1, characterized in that, The adjustable connecting shaft (11) includes a first connecting shaft (111) and a second connecting shaft (112). The first connecting shaft (111) is fixedly connected to one side of the moving core body (15), and the second connecting shaft (112) is at least partially sleeved on the first connecting shaft (111) and is adjustablely connected to the first connecting shaft (111) along the axial direction of the first connecting shaft (111).

3. The battery pack according to claim 1, characterized in that, The adjusting member (40) includes a nut that is threadedly connected to the end of the adjustable connecting shaft (11) that extends into the housing (70).

4. The battery pack according to claim 3, characterized in that, The explosion-proof valve also includes a housing (30), which is sleeved on the end of the adjustable connecting shaft (11) that extends into the outer shell (70) and the nut. At least one adjustment hole (31) is provided on the side wall of the housing (30), and the nut is at least partially exposed in the adjustment hole (31).

5. The battery pack according to claim 4, characterized in that, The adjustment holes (31) include a plurality of holes, which are spaced apart circumferentially along the housing (30).

6. The battery pack according to claim 4, characterized in that, Along the axial direction of the adjustable connecting shaft (11), the thickness of the nut is L1 mm and the length of the adjusting hole (31) is L2 mm, satisfying L2 / L1≥2.

7. The battery pack according to claim 1, characterized in that, The first through hole (21) is located in the middle region of the valve body (20), and the pressure relief hole (22) includes a plurality of holes, which are spaced apart on the outer periphery of the first through hole (21).

8. The battery pack according to claim 7, characterized in that, The valve body (20) is also provided with a plurality of first mounting holes (23), and the plurality of first mounting holes (23) and the plurality of pressure relief holes (22) are alternately arranged on the outer periphery of the first through hole (21); The explosion-proof valve also includes a fixing member (80) which passes through the first mounting hole (23) and the housing (70) to detachably connect the valve body (20) to the housing (70).

9. The battery pack according to claim 1, characterized in that, The moving core body (15) includes a base plate (12) and a side plate (13) connected to one side of the base plate (12). The adjustable connecting shaft (11) is connected to the base plate (12), and the adjustable connecting shaft (11) and the side plate (13) are located on the same side of the base plate (12). The base plate (12) covers the pressure relief hole (22) and the second through hole (71). The side plate (13) abuts against the outer shell (70). The end of the side plate (13) away from the base plate (12) is provided with a groove (14). The battery pack also includes a sealing ring (60) which is embedded in the groove (14) and at least partially exposed outside the groove (14) to seal the gap between the moving core (10) and the outer casing (70).

10. The battery pack according to claim 4, characterized in that, The housing (30) extends at least partially into the second through hole (71) and there is a first gap between the housing (30) and the second through hole (71); The pressure relief hole (22) is at least partially disposed opposite to the first gap to provide a pressure relief channel for the battery pack.

11. An electrical appliance, characterized in that, It includes an electrical device body and a battery pack as described in any one of claims 1-10, wherein the battery pack is connected to the electrical device body.

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