Pole and battery

Abstract

The invention relates to the technical field of batteries, and provides a pole and a battery, the pole comprises a pole body and a buffer medium, the pole body is provided with a containing cavity, and the buffer medium is movably arranged in the containing cavity and used for moving relative to the pole body under the condition that the pole is impacted so as to offset at least part of impact force borne by the pole. According to the scheme, the problems that the post terminal deforms and the welding point and / or the welding wire of the post terminal and the tab or the adapter piece is easy to crack under the condition that the battery is impacted can be effectively relieved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a pole and a battery. Background Art

[0002] In batteries, the terminals are typically welded to the tabs of the battery cells, or welded to the tabs via adapters. During use, the terminals connect to external circuits to transmit current from the inside of the battery to the outside. Due to operating conditions such as bumps and vibrations, the terminals, their welds, and / or welding wires are easily impacted, causing them to deform, crack in the welds, or pull on the tabs, thereby compromising the battery's seal and current handling capacity.

[0003] In the prior art, in order to alleviate the impact on the pole, a buffer structure is usually designed from the battery module or pack level. For example, a buffer pad or other structure is added outside the battery module or outside the pack to alleviate the impact on the battery, thereby alleviating the impact on the pole. However, this buffering method relies on an external buffer structure. For the pole, the buffering path is long and the buffering effect is poor. Summary of the Invention

[0004] In view of this, the present application provides a pole and a battery, which can effectively alleviate the problem of pole deformation and cracking of welding points and / or welding lines between the pole and the tab or adapter when the battery is impacted.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A pole, comprising:

[0007] The pole body has a receiving cavity;

[0008] The buffer medium is movably arranged in the accommodating cavity and is used for moving relative to the pole body when the pole is impacted, so as to offset at least part of the impact force on the pole.

[0009] Optionally, along the center line direction of the accommodating cavity, the height of the buffer medium is H1, the depth of the accommodating cavity is H2, and 4 / 5H2≥H1≥2 / 3H2.

[0010] Optionally, the buffer medium comprises a solid medium.

[0011] Optionally, the solid medium includes a plurality of first solid media and a plurality of second solid media, the radius of the first solid medium is greater than the radius of the second solid medium, wherein:

[0012] The second solid medium is filled in gaps formed by a plurality of adjacent first solid media and / or in a gap formed by the first solid medium and the cavity wall of the accommodating cavity.

[0013] Optionally, a baffle is provided on the cavity wall of the accommodating cavity, and the baffle extends in a direction close to the center line of the accommodating cavity. In a plane perpendicular to the center line direction, the baffle is limitedly engaged with the buffer medium.

[0014] Optionally, the baffle divides the accommodating chamber into at least two sub-areas, and the at least two sub-areas are interconnected so that the buffer media in the at least two sub-areas flow through each other;

[0015] The baffle is provided with a through hole, the diameter of the through hole is smaller than the diameter of the first solid medium, and the diameter of the through hole is larger than the diameter of the second solid medium, so as to allow the second solid medium to pass through.

[0016] Optionally, a baffle is provided on the cavity wall of the accommodating cavity, the baffle extending in a direction close to the center line of the accommodating cavity, and in a plane perpendicular to the center line, the baffle is in position-limiting cooperation with the buffer medium;

[0017] The baffle divides the accommodating chamber into at least two sub-regions. The at least two sub-regions are interconnected so that the buffer media in the at least two sub-regions can flow through each other.

[0018] Optionally, the pole body includes a main body portion and a blocking portion, the main body portion is provided with a groove, the blocking portion is connected to the groove and blocks a notch of the groove, so that the groove and the blocking portion enclose the accommodating cavity;

[0019] The groove is cylindrical, and along the axial direction of the groove, the height of the baffle is d, the depth of the groove is D, along the radial direction of the groove, the width of the baffle is w, the radius of the groove is R, 1 / 3D≤d≤D, and / or, 1 / 3R≤w≤R.

[0020] Optionally, the radius of the first solid medium is r1, and the radius of the second solid medium is r2, where r1 = 0.5-2 mm.

[0021] A battery comprises a housing, a battery cell, and a top cover, wherein the battery cell is accommodated in the housing, and the top cover is snap-fitted into an opening of the housing, wherein:

[0022] The top cover is provided with the above-mentioned pole; and / or,

[0023] The housing is provided with the above-mentioned pole.

[0024] In the embodiment of the present application, when the pole is impacted, the buffer medium and the pole body move relative to each other under the action of the impact force, converting part of the impact force into other forms of energy such as kinetic energy, attenuating the impact force, and buffering the impact on the pole. It can be seen that the pole provided in the embodiment of the present application uses the pole's own structure to buffer the impact when it is impacted, with a short buffer path and timely buffering, thereby effectively reducing the risk of pole deformation and cracking of the welds and / or welds between the pole and the tab or adapter when the battery is impacted. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0026] Figure 1 A schematic structural diagram of the top cover provided in an embodiment of the present application.

[0027] Figure 2 An exploded view of a top cover with a first type of pole provided in an embodiment of the present application.

[0028] Figure 3 This is a schematic structural diagram of the top cover after the blocking portion of the pole is removed according to an embodiment of the present application.

[0029] Figure 4 A cross-sectional view of a top cover with a first type of pole provided in an embodiment of the present application.

[0030] Figure 5 for Figure 4 A partial enlarged view of .

[0031] Figure 6 An exploded view of a top cover with a second type of pole provided in an embodiment of the present application.

[0032] Figure 7 A partial structural schematic diagram of a cross-sectional view of a top cover with a second type of pole provided in an embodiment of the present application.

[0033] Figure 8 An exploded view of a top cover with a third type of pole provided in an embodiment of the present application.

[0034] Figure 9 A partial structural schematic diagram of a cross-sectional view of a top cover with a third type of pole provided in an embodiment of the present application.

[0035] Figure 10A schematic diagram of the partial structure of a cross-sectional view of a top cover with a third type of pole provided in an embodiment of the present application from another angle.

[0036] Figure 11 A schematic structural diagram of a pole body with a baffle provided in an embodiment of the present application.

[0037] exist Figures 1-11 middle:

[0038] 100, pole; 110, pole body; 111, body portion; 1111, groove; 112, blocking portion; 113, accommodating cavity; 114, baffle; 120, buffer medium; 121, first solid medium; 122, second solid medium;

[0039] 200. Top cover piece. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0041] like Figures 1-11 As shown, an embodiment of the present application provides a pole that can be used in a battery. The pole 100 includes a pole body 110 and a buffer medium 120 .

[0042] Among them, the pole body 110 has a accommodating cavity 113, and the buffer medium 120 can be movably arranged in the accommodating cavity 113, so that the buffer medium 120 can move in the accommodating cavity 113. The buffer medium 120 is used to move relative to the pole body 110 when the pole 100 is impacted. When the pole 100 is subjected to an impact force, relative movement will occur between the pole body 110 and the internal buffer medium 120. In this process, the impact force will cause the buffer medium 120 to move and / or change position. According to the law of conservation of energy, the energy contained in the impact force will not disappear out of thin air, but will be converted into kinetic energy or gravitational potential energy or other forms of energy of the buffer medium 120 through the interaction between the pole body 110 and the buffer medium 120 to offset at least part of the impact force applied to the pole 100.

[0043] In the embodiment of the present application, when the electrode 100 is impacted, the impact force causes the buffering medium 120 and the electrode body 110 to move relative to each other, converting part of the impact force into other forms of energy such as kinetic energy, attenuating the impact force, and buffering the impact on the electrode 100. Thus, the electrode 100 provided in the embodiment of the present application utilizes its own structure to buffer the impact when it is impacted, resulting in a short buffering path and timely buffering, thereby effectively reducing the risk of deformation of the electrode and cracking of the welds and / or welds between the electrode and the tab or adapter when the battery is impacted.

[0044] When the pole 100 is not impacted, the buffer medium 120 is supported on the bottom wall of the accommodating cavity 113 due to gravity.

[0045] When the pole 100 is impacted, in some cases, the pole body 110 obtains kinetic energy to generate movement, which includes downward movement. The buffer medium 120 moves laggingly under the action of inertia, so that the buffer medium 120 contacts other cavity walls other than the bottom wall, and applies a reaction force opposite to the direction of the impact force to the other cavity walls in contact with it, thereby offsetting at least part of the impact force received by the pole 100; at the same time, due to the hysteresis of the movement of the buffer medium 120, the position of the buffer medium 120 in the vertical direction is raised relative to the pole body 110, and the buffer medium 120 and the accommodating cavity 110 are relatively close. 3, the kinetic energy of the pole body 110 is partially transferred to the buffer medium 120 and converted into the gravitational potential energy of the buffer medium 120 (it should be noted that in the closed system formed by the pole body 110 and the buffer medium 120, the change in the position of the buffer medium 120 relative to the pole body 110 will cause the redistribution of internal energy). As a result, part of the impact force is converted into the gravitational potential energy of the buffer medium 120, offsetting part of the impact force on the pole 100. In other words, the pole 100 uses the inertia and gravity of the buffer medium 120 to offset at least part of the impact on the pole 100.

[0046] For example, when the pole 100 is subjected to a downward impact force, the pole body 110 obtains downward kinetic energy and moves downward. Under the action of inertia, the buffer medium 120 maintains its original state. At this time, the buffer medium 120 is raised in the vertical direction relative to the pole body 110, and collides with the top wall of the accommodating cavity 113 to generate an upward reaction force, thereby offsetting at least part of the downward impact force; at the same time, at the moment when the buffer medium 120 collides with the top wall of the accommodating cavity 113, part of the kinetic energy of the pole body 110 is transferred to the buffer medium 120 and converted into the gravitational potential energy of the buffer medium 120, part of it is converted into heat energy during the collision process (heat is generated by friction between the buffer medium 120 and the inner wall of the accommodating cavity 113), and part of it may be converted into elastic potential energy (if the buffer medium 120 and the pole body 110 are elastically deformed), so that the kinetic energy of the pole body 110 is reduced due to energy conversion and loss. Subsequently, the buffer medium 120 begins to fall downward due to gravity and the continued movement of the pole body 110. The gravitational potential energy of the buffer medium 120 is converted into kinetic energy, and the direction of movement of the pole body 110 becomes consistent. However, during the fall, it collides or rubs against the internal structure of the pole body 110 again, further dissipating energy in the form of heat. In this way, through the relative movement and collisions between the pole body 110 and the buffer medium 120, and the repeated energy conversion (kinetic energy → potential energy → kinetic energy) and energy loss during each impact, the external impact energy is ultimately attenuated.

[0047] Of course, when the pole 100 is subjected to an oblique downward impact force, the inertia and gravity of the buffer medium 120 can also offset at least part of the impact force on the pole 100 .

[0048] When the pole 100 is impacted, in other cases, the pole body 110 transmits force to the buffer medium 120, causing the buffer medium 120 to move, so that at least part of the impact force is converted into kinetic energy of the buffer medium 120 to offset at least part of the impact force on the pole 100.

[0049] For example, when the pole 100 is subjected to an upward impact force, the impact force is transmitted to the pole body 110, and the pole body 110 transmits it to the buffer medium 120. The buffer medium 120 absorbs energy and jumps up, converting part of the impact into kinetic energy, thereby offsetting at least part of the upward impact force. The mutual collision and friction during the movement of the buffer medium 120 converts its kinetic energy into heat energy, sound energy, etc., gradually attenuating the external impact energy.

[0050] It should be noted that the upward impact force and the downward impact force refer to the impact forces in the vertical direction upward and downward respectively; the oblique downward impact force refers to the impact force whose decomposed force includes the downward component; the oblique upward impact force refers to the impact force whose decomposed force includes the upward component; the top wall of the accommodating chamber 113 refers to the wall surface of the accommodating chamber 113 at the top in the vertical direction, and the bottom wall of the accommodating chamber 113 refers to the wall surface of the accommodating chamber 113 at the bottom in the vertical direction.

[0051] There are many ways to achieve that the buffer medium 120 is movably arranged in the accommodating cavity 113. In an optional embodiment, there may be a gap between the buffer medium 120 and the top wall of the accommodating cavity 113. In this way, when the pole 100 is not subjected to impact force, the bottom wall of the accommodating cavity 113 supports the buffer medium 120, and there is a movable space between the buffer medium 120 and the top wall of the accommodating cavity 113, so that the buffer medium 120 can move in the accommodating cavity 113.

[0052] Specifically, along the centerline direction of the accommodating cavity 113, the height of the buffer medium 120 can be H1, and the depth of the accommodating cavity 113 can be H2. H1 can be ≥2 / 3H2, and H1 can be ≤4 / 5H2. This ratio can ensure that the buffer medium 120 has sufficient space to move, preventing the space between the buffer medium 120 and the top wall of the accommodating cavity 113 from being too small, causing the buffer medium 120 to contact the top wall of the accommodating cavity 113 too early and causing a rigid collision between the two. It can also prevent the space between the buffer medium 120 and the top wall of the accommodating cavity 113 from being too large, so that when the pole 100 is impacted, the buffer medium 120 is excessively displaced, resulting in the impact of the buffer medium 120 on the pole 100 being greater than the buffering of the pole 100.

[0053] It should be noted that the centerline direction of the accommodating cavity 113 is consistent with the vertical direction.

[0054] In other optional embodiments, a guide member may be provided in the accommodating cavity 113, and the buffer medium 120 may be movably connected to the guide member. For example, the guide member may be a guide column, and the buffer medium 120 may be passed through the guide column, and along the extension direction of the guide column, the length of the buffer medium 120 passed through the guide column is less than the length of the guide column itself, so that the buffer medium 120 can be movably provided on the guide column, and then movably provided in the accommodating cavity 113, so that the buffer medium 120 can move in the accommodating cavity 113.

[0055] The buffer medium 120 may include a solid medium or a fluid medium, such as water, coolant, etc.

[0056] In an optional embodiment, the solid medium may include a plurality of steel balls with the same radius. Of course, the solid medium may also include a plurality of structural members in other shapes such as cylinders.

[0057] In an optional embodiment, the solid medium may include multiple first solid media 121 and multiple second solid media 122, the radius of the first solid medium 121 may be greater than the radius of the second solid medium 122, the first solid medium 121 and the second solid medium 122 may both be steel balls, and the gaps formed by the adjacent multiple first solid media 121 and the gaps formed by the first solid medium 121 and the cavity wall of the accommodating cavity 113 may be filled with the second solid medium 122, so that in a plane perpendicular to the center line direction of the accommodating cavity 113, the buffer medium 120 is limitedly matched with the cavity wall of the accommodating cavity 113, so that the buffer medium 120 moves relative to the pole body 110 along the center line direction of the accommodating cavity 113.

[0058] This structure can alleviate the problem of the buffer medium 120 shaking in a plane perpendicular to the center line of the pole 100 when the pole 100 shakes in a plane perpendicular to its own center line, thereby reducing the fluctuation and impact of the buffer medium 120 on the pole body 110 in the plane perpendicular to the center line of the pole 100.

[0059] In addition, when the pole 100 is impacted, the impact force is transmitted to the buffer medium 120, and the first solid medium 121 and the second solid medium 122 move in the accommodating cavity 113. The collision, rolling and friction between them can effectively convert part of the kinetic energy into heat energy and sound energy, thereby playing a role in attenuating the impact.

[0060] When a battery having the pole 100 according to an embodiment of the present application is used in a vehicle, the vibration fatigue of the pole 100 is mainly up and down vibration and bumping. The second solid medium 122 fills the gap between the adjacent first solid medium 121 and the gap between the first solid medium 121 and the cavity wall of the accommodating cavity 113, thereby alleviating the problem of the first solid medium 121 shaking in a plane perpendicular to the center line of the pole 100, thereby alleviating the problem that when the vehicle brakes or accelerates, the buffer medium 120 hinders movement due to inertia, resulting in slow acceleration, long braking distance, difficulty in vehicle body control, and easy rollover.

[0061] When a battery having the pole 100 of an embodiment of the present application is used in a vehicle, the plane perpendicular to the center line of the pole 100 is consistent with the plane in the X direction and Y direction of the vehicle (the X direction refers to the front-to-back direction, and the Y direction refers to the left-to-right direction), and the center line direction of the pole 100 is consistent with the Z direction (height direction) of the vehicle.

[0062] Optionally, the radius of the first solid medium 121 is r1, and the radius of the second solid medium 122 is r2, wherein r1=0.5-2 mm, for example, 0.5 mm, 1 mm, 2 mm, Under this size ratio, the accommodating cavity 113 of the same volume can accommodate more first solid media 121 and second solid media 122 . The more first solid media 121 and second solid media 122 there are, the greater the impact that can be absorbed.

[0063] In a further technical solution, the cavity wall of the accommodating cavity 113 may be provided with a baffle 114. Optionally, one end of the baffle 114 may be connected to the side wall of the accommodating cavity 113, that is, the cavity wall other than the top wall and the bottom wall. The top wall and the bottom wall of the accommodating cavity 113 are relatively distributed along the center line of the pole 100. The other end of the baffle 114 may extend in the direction close to the center line of the accommodating cavity 113. In a plane perpendicular to the center line direction, the baffle 114 may be limited and cooperated with the buffer medium 120 to reduce the swing amplitude of the first solid medium 121 in the plane perpendicular to the center line of the pole 100, reduce the fluctuation and impact of the buffer medium 120 on the pole body 110 in the plane perpendicular to the center line of the pole 100, and avoid the first solid medium 121 with a larger diameter from concentratedly impacting the cavity wall of the accommodating cavity 113 under the action of inertia, thereby dispersing the impact force and reducing local stress concentration.

[0064] In an optional embodiment, the baffle 114 can divide the accommodating cavity 113 into a plurality of mutually isolated sub-areas. It can be understood that, when there is only one baffle 114, the width w of the baffle 114 is equal to the diameter 2R of the groove 1111 (see below), and the height d of the baffle 114 is equal to the depth D of the groove 1111; when there are multiple baffles 114, the width w of the baffle 114 is equal to the radius R of the groove 1111, and the height d of the baffle 114 is equal to the depth D of the groove 1111.

[0065] In another optional embodiment, the baffle 114 may separate the accommodating chamber 113 into at least two sub-regions, and the sub-regions are interconnected so that the buffer medium 120 in each sub-region can flow through each other.

[0066] In this case, the buffer medium 120 can move within multiple sub-areas. When the pole 100 is impacted, the buffer medium 120 can distribute the impact force more evenly, reduce local stress concentration, avoid structural damage caused by single-point overload, and expand the movement range of the buffer medium 120. The impact energy received by the pole 100 can be further dissipated through the rolling and collision of the buffer medium 120, thereby improving the energy absorption efficiency of the buffer medium 120 and improving the buffering effect of the impact received by the pole 100. At the same time, the buffer medium 120 can also flow and redistribute in multiple sub-areas through the through holes according to the direction in which the pole 100 is impacted, flexibly adjust its position, better adapt to multi-angle or repeated impact conditions, and improve the dynamic response capability of the buffer medium 120.

[0067] Specifically, for example, when there is only one baffle 114: (1) the width w of the baffle 114 can be equal to the diameter 2R of the groove 1111, and the baffle 114 is provided with a through hole so that the buffer medium 120 in each sub-area can circulate with each other; (2) the width w of the baffle 114 is less than the diameter 2R of the groove 1111 and greater than the radius R of the groove 1111, that is, one end of the baffle 114 is connected to the side wall of the accommodating cavity 113, and the other end extends in a direction close to the center line of the accommodating cavity 113 and has a gap with the side wall of the accommodating cavity 113, through which the buffer medium 120 in each sub-area can circumferentially ... In addition, the mutual circulation of the buffer media 120 in each sub-area may be the circulation of part of the buffer media 120 or the circulation of all the buffer media 120 , which can be adjusted according to actual conditions.

[0068] In a further technical solution, the baffle 114 may be provided with a through hole, the diameter of which may be larger than the diameter of the second solid medium 122 and smaller than the diameter of the first solid medium 121, so that the first solid medium 121 cannot pass through the through hole, but the second solid medium 122 can pass through the through hole, thereby facilitating the movement of the second solid medium 122 in various areas, improving the movement efficiency of the second solid medium 122 between multiple sub-areas, filling the gaps between the first solid medium 121 at any time, and facilitating balancing the number of second solid media 122 in each sub-area.

[0069] Of course, when the solid medium includes multiple steel balls with the same radius, the cavity wall of the accommodating cavity 113 can also be provided with a baffle 114. One end of the baffle 114 can be connected to the side wall of the accommodating cavity 113, that is, the cavity wall except the top wall and the bottom wall. The top wall and the bottom wall of the accommodating cavity 113 are relatively distributed along the direction of the center line of the pole 100, and the other end of the baffle 114 extends toward the direction close to the center line of the accommodating cavity 113. In the plane perpendicular to the center line direction, the baffle 114 and the buffer medium 120 are limited and cooperated to reduce the swing amplitude of the buffer medium 120 in the plane perpendicular to the center line of the pole 100, and reduce the fluctuation and impact of the buffer medium 120 on the pole body 110 in the plane perpendicular to the center line of the pole 100.

[0070] In order to facilitate the filling of the buffer medium 120, the pole body 110 may include a main body portion 111 and a sealing portion 112. The sealing portion 112 may be a cover plate. The main body portion 111 may be provided with a groove 1111. The sealing portion 112 is connected to the groove 1111 by welding, bolt connection, clamping, interference fit, etc., and seals the notch of the groove 1111 so that the groove 1111 and the sealing portion 112 form a accommodating cavity 113. Under this structure, the sealing portion 112 can be installed after the buffer medium 120 is filled in the groove 1111, which facilitates the filling of the buffer medium 120.

[0071] In batteries in the prior art, such as cylindrical batteries, the welding method for the pole and the tab / adapter is laser penetration welding, and the penetration direction is from the outside of the battery to the inside of the battery. In order to reduce the difficulty of penetration, the pole is usually thinned. The thinning method is to open a thinning groove on the outside of the pole. During welding, the pole and the tab / adapter are welded from the bottom of the thinning groove.

[0072] In the embodiment of the present application, the thinned groove of the pole 100 can be used as the groove 1111 to form the accommodating cavity 113. In this structure, the existing thinned groove of the pole 100 is used to hold the buffering medium 120 to buffer the pole 100, so that the thinned groove serves a dual purpose, simplifies the structure of the pole 100, reduces the number of slots on the pole 100, and improves the structural strength of the pole 100.

[0073] In addition, existing batteries (such as cylindrical batteries) have reduced electrode thickness due to the reduced electrode flow area, which, to a certain extent, reduces the battery's flow capacity. In the embodiment of the present application, when the thinned groove is used as the groove 1111 to form the accommodating cavity 113, the buffer medium 120 can be a conductor, such as a metal steel ball. In this way, filling the groove 1111 with the conductive metal steel ball or other buffer medium 120 is equivalent to compensating for the reduced thickness of the electrode 100, thereby increasing the flow area of ​​the electrode 100 and increasing the battery's flow capacity while achieving penetration welding.

[0074] Of course, in other optional embodiments, a new groove may be opened outside the thinning groove to serve as the groove 1111 forming the accommodating cavity 113 .

[0075] Please refer again Figure 11 The groove 1111 can be cylindrical. Along the axial direction of the groove 1111 (i.e., the centerline direction of the accommodating cavity 113), the height of the baffle 114 is d, the depth of the groove 1111 is D (the depth D of the groove is the same as the depth H2 of the accommodating cavity 114), the thickness of the sealing portion 112 is t, and along the radial direction of the groove 1111, the width of the baffle 114 is w, the radius of the groove 1111 is R, 1 / 3D≤d≤D, and / or, 1 / 3R≤w≤R, by controlling the width w and height d of the baffle 114, the sub-areas are controlled to be connected to each other. In addition, based on the "boundary layer effect" in fluid mechanics, the width and height design of the baffle 114 can balance the fluidity restriction of the buffer medium 120 and the impact force dispersion requirement, thereby preventing the disordered movement of the buffer medium 120 from causing secondary impact.

[0076] Optionally, when there are multiple baffles 114, the multiple baffles 114 can be evenly distributed and connected in the groove 1111, and the multiple baffles 114 can all be connected to the side wall of the groove 1111 at the first end, extend in the axial direction of the groove 1111 at the second end, be connected to the bottom wall of the groove 1111 at the third end, and face the notch of the groove 1111 at the fourth end, wherein the first end and the second end are opposite to each other, the third end and the fourth end are opposite to each other, the height d of the baffle 114 is smaller than the depth D of the groove 1111, and the width w of the baffle 114 is smaller than the radius R of the groove 1111.

[0077] Based on the above-mentioned pole, the embodiment of the present application also provides a battery that can be used in electric vehicles or hybrid vehicles. The battery includes a shell, a battery cell, and a top cover. The battery cell is accommodated in the shell, and the top cover is snap-fitted to the opening of the shell. The above-mentioned pole 100 is provided on the top cover. Specifically, the top cover includes a top cover sheet 200, and the top cover sheet 200 has a pole through hole. The pole 100 is installed on the top cover sheet 200 through the pole through hole. The pole 100 has a groove 1111, and the bottom of the groove 1111 has a welding area for the pole 100 and the tab / adapter. Alternatively, the above-mentioned pole 100 can also be provided on the shell. Since the battery has the above-mentioned pole 100, the beneficial effects of the battery brought by the pole 100 can be found in the above content and will not be repeated here.

[0078] The basic principles of the present application have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, and effects mentioned in this application are merely illustrative and not restrictive, and it should not be assumed that these advantages, strengths, and effects are required of each embodiment of this application. In addition, the specific details disclosed above are merely illustrative and facilitating understanding, and are not restrictive. The above details do not limit this application to necessarily being implemented using the above specific details.

[0079] The block diagrams of the devices, devices, equipment, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, devices, equipment, and systems can be connected, arranged, or configured in any manner. Words such as "include," "comprise," "have," and the like are open-ended words, meaning "including but not limited to," and can be used interchangeably therewith. The words "or" and "and" used herein refer to the words "and / or" and can be used interchangeably therewith, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to," and can be used interchangeably therewith.

[0080] It should also be noted that in the apparatus, device, and method of the present application, each component or each step can be decomposed and / or recombined, and such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0081] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0082] It should be understood that the qualifiers "first", "second", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present application are only used to more clearly illustrate the technical solutions and cannot be used to limit the scope of protection of the present application.

[0083] The above description has been provided for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A pole, characterized in that: include: The pole body (110) has a receiving cavity (113); A buffer medium (120) is movably disposed in the accommodating cavity (113) and is used to move relative to the pole body (110) when the pole (100) is impacted, so as to offset at least part of the impact force applied to the pole (100).

2. The pole according to claim 1, characterized in that Along the centerline direction of the accommodating cavity (113), the height of the buffer medium (120) is H1, the depth of the accommodating cavity (113) is H2, and 4 / 5H2≥H1≥2 / 3H2.

3. The pole according to claim 1, characterized in that The buffer medium (120) comprises a solid medium.

4. The pole according to claim 3, characterized in that The solid medium comprises a plurality of first solid media (121) and a plurality of second solid media (122), the radius of the first solid medium (121) being greater than the radius of the second solid medium (122), wherein: The second solid medium (122) is filled in gaps formed by a plurality of adjacent first solid media (121), and / or in a gap formed by the first solid medium (121) and the cavity wall of the accommodating cavity (113).

5. The pole according to claim 4, characterized in that A baffle (114) is provided on the cavity wall of the accommodating cavity (113), and the baffle (114) extends in a direction close to the center line of the accommodating cavity (113). In a plane perpendicular to the center line direction, the baffle (114) and the buffer medium (120) are limitedly matched.

6. The pole according to claim 5, characterized in that The baffle (114) divides the accommodating chamber (113) into at least two sub-areas, and the at least two sub-areas are interconnected so that the buffer media (120) in the at least two sub-areas can flow through each other. The baffle (114) is provided with a through hole, the diameter of which is smaller than the diameter of the first solid medium (121) and larger than the diameter of the second solid medium (122), so as to allow the second solid medium (122) to pass through.

7. The pole according to claim 1, characterized in that The cavity wall of the accommodating cavity (113) is provided with a baffle (114), the baffle (114) extending in a direction close to the center line of the accommodating cavity (113), and in a plane perpendicular to the center line direction, the baffle (114) and the buffer medium (120) are limitedly matched; The baffle (114) divides the accommodating chamber (113) into at least two sub-regions, and the at least two sub-regions are interconnected so that the buffer media (120) in the at least two sub-regions can flow through each other.

8. The pole according to claim 6 or 7, characterized in that: The pole body (110) comprises a main body portion (111) and a blocking portion (112); the main body portion (111) is provided with a groove (1111); the blocking portion (112) is connected to the groove (1111) and blocks the notch of the groove (1111), so that the groove (1111) and the blocking portion (112) enclose the accommodating cavity (113); The groove (1111) is cylindrical, and along the axial direction of the groove (1111), the height of the baffle (114) is d, the depth of the groove (1111) is D, along the radial direction of the groove (1111), the width of the baffle (114) is w, the radius of the groove (1111) is R, 1 / 3D≤d≤D, and / or, 1 / 3R≤w≤R.

9. The pole according to claim 4, characterized in that The radius of the first solid medium (121) is r1, and the radius of the second solid medium (122) is r2, where r1 = 0.5-2 mm. r1-3 / 2r1.

10. A battery, characterized in that: It includes a shell, a battery cell and a top cover, wherein the battery cell is accommodated in the shell, and the top cover is buckled with the opening of the shell, wherein: The top cover is provided with a pole (100) according to any one of claims 1 to 9; and / or, The housing is provided with a pole (100) according to any one of claims 1 to 9.

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