Battery and electric equipment

Abstract

The utility model provides a battery and electric equipment. The battery comprises a box body, the box body comprises a box body side wall and an energy absorption cavity arranged on the outer side of the box body side wall, and the energy absorption cavity comprises a supporting part connected to the outer side of the box body side wall; the deformation part is connected to the side, away from the side wall of the box body, of the supporting part; the compression resisting part is connected to the side, away from the supporting part, of the deformation part; wherein the deformation part comprises a weak part, and the weak part is configured to enable the deformation part to deform before the compression resisting part and the supporting part when the energy absorption cavity deforms due to stress, and enable the compression resisting part to be turned over close to the side wall of the box body. The electric equipment comprises the battery.

Description

Technical Field

[0001] The present disclosure relates to the technical field of new energy vehicles, and in particular to a battery and an electrical device. Background Art

[0002] Although the continuous advancement of new energy vehicle technology has brought about many developments, the safety performance of new energy vehicles is still difficult to guarantee. During driving, since the batteries of new energy vehicles are generally arranged under the chassis of the vehicle, the bottom of the battery may be hit, scratched, and supported by foreign objects. The battery packs or battery modules used in new energy vehicles generally have high energy and active chemical properties. Under stress, the battery is prone to leakage, short circuit, and even spontaneous combustion. Utility Model Content

[0003] In view of the above problems, the present application provides a battery and an electrical device, aiming to solve the problem that the battery is easily leaked, short-circuited, or even spontaneously combusted and caught fire due to impact.

[0004] According to a first aspect of the present disclosure, there is provided a battery, comprising a box body, wherein the box body comprises a box body side wall and an energy absorbing cavity arranged on the outer side of the box body side wall, wherein the energy absorbing cavity comprises: a supporting portion connected to the outer side of the box body side wall; a deforming portion connected to a side of the supporting portion away from the box body side wall; and a pressure-resistant portion connected to a side of the deforming portion away from the supporting portion; wherein the deforming portion comprises a weak portion, and the deforming portion is configured to deform before the pressure-resistant portion and the supporting portion when the energy absorbing cavity is deformed due to force, and to cause the pressure-resistant portion to fold toward the box body side wall.

[0005] In the technical solution of the embodiment of the present application, the battery includes a box body, the box body includes a box body side wall and an energy absorption cavity arranged on the outside of the box body side wall, the energy absorption cavity includes a support part, a deformation part and a pressure-resistant part, the deformation part includes a weak part, and the deformation part is configured to deform before the pressure-resistant part and the support part when the energy absorption cavity is deformed due to force. Since the deformation part includes the weak part, such a design allows the box body of the battery to deform before the pressure-resistant part and the support part when the box body is impacted, and the pressure-resistant part is folded toward the box body side wall, thereby playing an energy absorption role, which is conducive to buffering the impact of the impact object on the box body side wall, and is conducive to preventing the battery cells or battery modules in the box body from leaking, short-circuiting, or heating and self-igniting due to the impact, thereby helping to improve the safety performance of the battery. After the pressure-resistant part is folded toward the box body side wall, it is conducive to forming a barrier between the box body side wall and the impact object together with the support part to play a buffering role, thereby helping to achieve the effect of secondary energy absorption.

[0006] In some embodiments, the supporting portion and the side wall of the box body form a first cavity; the deforming portion includes two connecting plates spaced apart and oppositely arranged along the height direction of the side wall of the box body, at least one of the two connecting plates includes the weak portion, and the supporting portion, the two connecting plates and the pressure-resistant portion form a second cavity; the pressure-resistant portion includes a third cavity; wherein, when the energy-absorbing cavity is deformed under force, the second cavity collapses before the first cavity and the third cavity.

[0007] The second cavity is formed between the supporting part and the anti-pressure part by using the connecting plate, and the weak part is arranged on the connecting plate, which is beneficial for flexibly setting the position and structural shape of the weak part by using the connecting plate, and is beneficial for simplifying the structure and saving structural space.

[0008] In some embodiments, at least one of the connecting plates includes a bent plate or a curved plate protruding toward the second cavity, and the weak portion includes the bent plate or the curved plate.

[0009] Compared with a flat plate, a bent plate or a curved plate is easy to bend after being stressed. Setting the connecting plate as a bent plate or a curved plate protruding toward the second cavity is conducive to forming a weak portion through the bent plate or the curved plate, so as to facilitate the deformation of the deformed portion before the pressure-resistant portion and the supporting portion when the energy-absorbing cavity is deformed due to stress. In addition, the bent plate or the curved plate protruding toward the second cavity is conducive to the two angled plate surfaces of the bent plate or the curved plate being gathered into the second cavity when the energy-absorbing cavity is deformed due to stress, so that the pressure-resistant portion moves close to the side wall of the box, which is conducive to spacing the impactor and the side wall of the box to achieve the effect of secondary energy absorption.

[0010] In some embodiments, the bending plate is an angled plate with an angle ranging from 80° to 160°.

[0011] Within this angle range, it is beneficial to maintain the structural strength of the box when the energy absorption cavity does not need to absorb energy, and it is also beneficial to ensure that the second cavity collapses before the first cavity and the third cavity when the energy absorption cavity needs to absorb energy.

[0012] In some embodiments, along the height direction of the side wall of the box body, the size of the deformation portion is smaller than the size of the supporting portion and the anti-pressure portion so that the outer surfaces of the supporting portion, the deformation portion and the anti-pressure portion form a first groove, and the weak portion is arranged on the bottom wall of the first groove.

[0013] The first groove is formed by the support part, the pressure-resistant part and the connecting plate, and the weak part is arranged on the bottom wall of the first groove, which is conducive to achieving the collapse of the second cavity before the first cavity and the third cavity when the energy-absorbing cavity is deformed by force, thereby facilitating the energy absorption effect of the deformation part. In addition, when the deformation part is deformed, the support part and the corresponding part of the pressure-resistant part that form the two side walls of the first groove are easier to approach, so that the setting position of the first groove can control the pressure-resistant part to fold in a predetermined direction when following the deformation of the deformation part.

[0014] In some embodiments, along the height direction of the side wall of the box body, the ratio of the size of the deformation portion to the size of the pressure-resistant portion is less than or equal to 2 / 3.

[0015] Setting this size ratio range is conducive to achieving the collapse of the second cavity before the first cavity and the third cavity when the energy absorbing cavity is deformed by force, thereby facilitating the energy absorption effect of the deformation part. In addition, the smaller the ratio of the size of the deformation part to the size of the pressure-resistant part, the easier it is for the deformation part to deform, which is conducive to accelerating the collapse of the second cavity, thereby facilitating the rapid achievement of the energy absorption effect.

[0016] In some embodiments, in the direction from the supporting portion to the anti-pressure portion, the weak portion includes a thin-walled section of the connecting plate, and the thickness of the thin-walled section is less than the thickness of the rest of the connecting plate; or the thickness of one of the connecting plates is less than the thickness of the cavity wall of the anti-pressure portion forming the first cavity and the cavity wall of the supporting portion forming the third cavity, and is less than the thickness of the other connecting plate.

[0017] Providing a weak portion including a thin-walled section of the connecting plate is beneficial for causing the connecting plate to deform first at the thin-walled section when the box is impacted, which helps to cause the second cavity to collapse before the first cavity and the third cavity, and is beneficial to achieving the energy absorption effect of the energy absorption cavity, thereby playing a buffering role on the battery cells or battery modules in the box.

[0018] The thickness of one connecting plate is smaller than the thickness of the cavity wall of the first cavity formed by the pressure-resistant part and the cavity wall of the third cavity formed by the supporting part, and is smaller than the thickness of the other connecting plate, so that the connecting plate with a smaller thickness becomes the weak part of the deformation part. When the box body is hit, the connecting plate with a smaller thickness deforms first, which helps to collapse the second cavity before the first cavity and the third cavity, and is conducive to achieving the energy absorption effect of the energy absorption cavity, thereby playing a buffering role for the battery cells or battery modules in the box body. In addition, it is simple and convenient to realize the weak part by setting a connecting plate with a smaller thickness, and there is no need to increase the deformation part processing steps due to setting the weak part.

[0019] In some embodiments, in a direction from the supporting portion to the anti-pressure portion, the thin-walled section is located in the middle and / or edge of the connecting plate.

[0020] The thin-walled section is located in the middle of the connecting plate, which is conducive to reducing the structural strength of the middle of the connecting plate, so that the second cavity begins to collapse from the middle when the box body is hit. The thin-walled section is located at the edge of the connecting plate, which is conducive to reducing the connection strength between the deformation part and the support part or the pressure-resistant part, thereby helping to enhance the energy absorption effect when the energy absorption cavity is deformed by force.

[0021] In some embodiments, the surface of the thin-walled section that faces away from and / or is close to the second cavity from the supporting portion to the anti-pressure portion forms a groove in the middle of the connecting plate; and / or the surface of the thin-walled section that faces away from the second cavity gradually approaches the second cavity from the rest of the connecting plate toward the edge of the connecting plate from the supporting portion to the anti-pressure portion and / or the surface of the thin-walled section that is close to the second cavity gradually moves away from the second cavity from the rest of the connecting plate toward the edge of the connecting plate.

[0022] From the supporting part to the anti-pressure part, the surface of the thin-walled section that is away from or close to the second cavity forms a groove in the middle of the connecting plate, which is beneficial to stress concentration in the groove when the box is hit, thereby facilitating rapid deformation.

[0023] From the supporting part to the anti-pressure part, the surface of the thin-walled section facing away from the second cavity gradually approaches the second cavity from the rest of the connecting plate toward the edge of the connecting plate and / or the surface of the thin-walled section close to the second cavity gradually moves away from the second cavity from the rest of the connecting plate toward the edge of the connecting plate. This arrangement of the thin-walled section can simply and conveniently achieve the setting of the weak part of the deformation part by gradually reducing the thickness of the edge of the connecting plate.

[0024] In some embodiments, the deformation portion further includes a local reinforcement member, which is located in the second cavity and is configured to form an acute angle with the connecting plate.

[0025] Since the deformed portion includes a weak portion, the weak portion weakens the structural strength of the deformed portion. Arranging a local reinforcement member in the second cavity is conducive to improving the local structural strength and rigidity of the deformed portion, so that the deformed portion has sufficient bearing capacity before the second cavity collapses, thereby helping to avoid the deformed portion from being deformed by force before the energy absorption cavity needs to absorb energy. The local reinforcement member is also conducive to maintaining the local shape after the second cavity collapses, so that it is conducive to better maintaining the deformed shape together with the support portion and the pressure-resistant portion after the impact, and the deformed energy absorption cavity continues to be supported on the outside of the box side wall to undertake the secondary energy absorption function.

[0026] In some embodiments, one end of the local reinforcing member is connected to a connection between the supporting portion and one of the two connecting plates, and the other end is connected to a connection between the anti-pressure portion and the other of the two connecting plates.

[0027] This arrangement is beneficial for ensuring that the local reinforcing components and the connecting plates are stably supported by the supporting parts or the anti-pressure parts, and for forming a spatial structure that protects the supporting parts or the anti-pressure parts. This helps the weak parts to deform before the supporting parts and the anti-pressure parts when the box is impacted, so as to achieve an energy absorption effect.

[0028] In some embodiments, along the height direction of the side wall of the box, the energy absorption cavity is connected to one end of the side wall of the box close to the bottom wall of the box, and the energy absorption cavity is configured to cause the pressure-resistant portion to fold toward the end of the side wall of the box opposite to the bottom wall of the box during force deformation.

[0029] The pressure-resistant portion is folded toward the end of the side wall of the box body opposite to the bottom wall of the box body. When the pressure-resistant portion forms a barrier together with the supporting portion, it covers the outer side of the side wall of the box body as much as possible, thereby increasing the projection area of ​​the barrier on the side wall of the box body, thereby facilitating better realization of the secondary energy absorption effect.

[0030] In some embodiments, the box body also includes a flange protruding toward the outside of the box body side wall, which is arranged at an end opposite to the box body bottom wall along the height direction of the box body side wall, and the box body side wall, the support portion and the flange form a secondary energy absorption space; the energy absorption cavity is configured to move the pressure-resistant portion into the secondary energy absorption space when deformed by force.

[0031] When the energy absorption cavity is deformed by force, the second cavity collapses before the first cavity and the third cavity due to the weak part, and the weak part causes the pressure-resistant part to move toward the secondary energy absorption space, and the flange is conducive to the pressure-resistant part being gathered in the secondary energy absorption space, and finally forms a barrier between the impact object and the side wall of the box body, achieving the effect of secondary energy absorption, which is conducive to further improving the energy absorption effect of the energy absorption cavity. In addition, the secondary energy absorption space is formed by using the side wall of the box body, the support part and the flange, and the layout is simple and compact, which is conducive to saving structural space.

[0032] In some embodiments, part of the anti-pressure portion is configured to match the shape of at least part of the secondary energy absorption space. This arrangement is conducive to forming a stable support structure of the part of the anti-pressure portion in the secondary energy absorption space, thereby facilitating the improvement of the secondary energy absorption effect.

[0033] In a second aspect, the present application provides an electric device, which includes the battery in the above embodiment, and the battery is configured to provide power to the electric device.

[0034] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of the present application. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation on the present disclosure. In the drawings:

[0036] Figure 1 It is a schematic diagram of the structure of a vehicle including a battery according to some embodiments of the present application, which shows the location where the battery is installed;

[0037] Figure 2 A schematic diagram of the exploded structure of a battery (the energy absorption cavity is not shown) according to some embodiments of the present application;

[0038] Figure 3 It is a schematic structural diagram of a battery box of some embodiments of the present application, which shows an energy absorbing cavity;

[0039] Figure 4 for Figure 3 A schematic side view of a portion of the structure of the box shown;

[0040] Figure 5 It is a schematic side view of a part of the structure of the battery box of some other embodiments of the present application;

[0041] Figure 6 It is a schematic side view of a part of the structure of the battery box of some other embodiments of the present application;

[0042] Figure 7 Schematic side view of a portion of the structure of a battery box according to other embodiments of the present application.

[0043] The reference numerals in the specific implementation manner are as follows:

[0044] D. Vehicles;

[0045] 1.Battery;

[0046] 100, box body, 101, box body side wall, 102, flange, 103, box body bottom wall;

[0047] 10. energy absorbing cavity, 11. supporting portion, 11A. first cavity, 11B. fourth cavity, 14A. secondary energy absorbing space, 12. deformation portion, 12A. second cavity, 12a. first groove, 120. weak portion, 1201. first thin-walled section, 1202. second thin-walled section, 1203. third thin-walled section, 121. first connecting plate, 122. second connecting plate, 123. local reinforcing member, 13. anti-pressure portion, 13A. third cavity;

[0048] 200, box cover;

[0049] C. Accommodation space;

[0050] 2. Battery pack, 20. Battery cell. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present disclosure and its application or use. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0052] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present disclosure. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0054] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0055] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0056] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0057] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0058] In the description of the present disclosure, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, upright, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present disclosure; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0059] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0060] With the continuous breakthroughs in battery technology, especially in terms of battery energy density, cycle life and power density, strong technical support has been provided for the new energy industry. However, the higher the energy density and power density of the battery, the easier it is for the oxidants and combustibles inside the battery to destroy the isolation layer inside the battery under strong impact, causing the battery to short-circuit or electrolyte leakage and sparks, thereby causing the battery to spontaneously combust and release a large amount of heat energy, and even fire and explosion accidents. In addition, the battery may deform when squeezed or punctured, causing the internal chemical reaction to run away, which will also cause rapid heat generation and eventually lead to fire.

[0061] Considering that the battery capacity of new energy vehicles is usually large, once a fire occurs, the fire is often extremely fierce and difficult to control. During the combustion process, the battery will produce a self-oxidation chemical reaction, releasing flammable and explosive gases, which will further increase the spread of the fire.

[0062] In order to prevent batteries from exploding due to collision, the present application provides a battery box including an energy-absorbing cavity, the energy-absorbing cavity including a supporting portion, a deforming portion and a pressure-resistant portion, the supporting portion being connected to the side wall of the battery box, the deforming portion being located between the pressure-resistant portion and the supporting portion, the battery utilizing the weak portion of the deforming portion to cause the deforming portion to deform before the supporting portion and the pressure-resistant portion when the battery is impacted, so that the deforming portion absorbs energy, thereby cushioning the impact on the battery box, which is beneficial to preventing battery modules or battery cells located in the box from leaking or even spontaneously combusting, thereby causing safety issues such as fire and explosion.

[0063] The battery is configured to provide electrical energy to electrical devices. Electrical devices may be, but are not limited to, mobile phones, portable devices, laptop computers, battery vehicles, electric vehicles, ships, spacecraft, electric toys, and electric tools, etc. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Electric tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers.

[0064] The battery of the embodiment of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. The battery mentioned in the present application may include a battery module or a battery pack, etc. The battery includes a battery box for encapsulating one or more battery cells, and the battery box includes a box body and a box cover. The battery box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.

[0065] In the present application, battery cells may include lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-hydrogen batteries, nickel-cadmium batteries, lead-acid batteries, etc., which are not limited in the embodiments of the present application. Battery cells may be flat, rectangular, or in other shapes, which are not limited in the embodiments of the present application. Battery cells are generally packaged as square battery cells and soft-pack battery cells, which are not limited in the embodiments of the present application.

[0066] In the following description, in the description of the direction of the battery 1, the first direction A corresponds to Figure 3 The direction represented by the arrow A, the second direction B corresponds to Figures 3 to 7 The direction indicated by the arrow B is also called the left-right direction. The so-called "up" and "down" correspond to Figures 4 to 7 The up and down directions in the figure also correspond to the height direction of the side walls of the box.

[0067] like Figures 3 to 7 As shown, according to some embodiments of the present application, a battery 1 is provided. The battery 1 includes a box body 100. The box body 100 includes a box body side wall 101 and an energy absorption cavity 10 arranged on the outside of the box body side wall 101. The energy absorption cavity 10 includes a support portion 11, a deformation portion 12 and a pressure-resistant portion 13. The support portion 11 is connected to the outside of the box body side wall 101. The deformation portion 12 is connected to a side of the support portion 11 away from the box body side wall 101. The pressure-resistant portion 13 is connected to a side of the deformation portion 12 away from the support portion 11. Among them, the deformation portion 12 includes a weak portion 120. The deformation portion 12 is configured to deform before the pressure-resistant portion 13 and the support portion 11 when the energy absorption cavity 10 is deformed due to force, and to fold the pressure-resistant portion 13 toward the box body side wall 101.

[0068] Since the deformable portion 12 includes a weak portion 120, such a design allows the deformable portion 12 of the box 100 to deform before the pressure-resistant portion 13 and the support portion 11 when the battery 1 is impacted, and the pressure-resistant portion 13 is folded toward the box side wall 101, thereby playing an energy absorption role, which is conducive to buffering the impact of the impactor on the box side wall 101, and is conducive to preventing the battery cells or battery modules in the box 100 from leaking, short-circuiting, or heating and self-igniting due to the impact, thereby helping to improve the safety performance of the battery 1. After the pressure-resistant portion 13 is folded toward the box side wall 101, it is conducive to forming a barrier between the box side wall 101 and the impactor together with the support portion 11 to play a buffering role, thereby helping to achieve the effect of secondary energy absorption.

[0069] like Figure 3 As shown, in some embodiments, the energy absorption cavity 10 can extend along the first direction A to ensure that the outer side of the box side wall 101 is arranged with the energy absorption cavity 10 along the first direction A, which is beneficial to improve the energy absorption effect and enhance the anti-collision function of the box 100.

[0070] like Figure 3 As shown, in some embodiments, the box body 100 includes two energy absorption cavities 10, which are respectively arranged on the outside of two opposite box body side walls 101 of the box body 100 along the second direction B. In other embodiments (not shown), the energy absorption cavity 10 can also be arranged on the outside of at least one of the two opposite box body side walls 101 along the first direction A according to actual conditions (for example, factors such as battery installation position and installation space size).

[0071] According to some embodiments of the present application, optionally, the support portion 11 and the box side wall 101 form a first cavity 11A. The deformation portion 12 includes two connecting plates spaced and arranged opposite to each other along the height direction of the box side wall 101. At least one of the two connecting plates includes a weak portion 120. The support portion 11, the two connecting plates and the pressure-resistant portion 13 form a second cavity 12A. The pressure-resistant portion 13 includes a third cavity 13A. Wherein, when the energy-absorbing cavity 10 is deformed by force, the second cavity 12A collapses before the first cavity 11A and the third cavity 13A.

[0072] A second cavity 12A is formed between the support portion 11 and the pressure-resistant portion 13 by using a connecting plate, and the weak portion 120 is arranged on the connecting plate. This is conducive to flexibly setting the position and structural shape of the weak portion 120 by using the connecting plate, which is conducive to simplifying the structure and saving structural space.

[0073] Optionally, further reference is made to Figures 4 to 6 , the upper connecting plate (hereinafter referred to as the first connecting plate 121) of the two connecting plates includes a weak portion 120. This arrangement is conducive to the first connecting plate 121 being damaged before the lower connecting plate (hereinafter referred to as the second connecting plate 122) when the box body 100 is impacted. In this case, the second cavity 12A collapses to cause the pressure-resistant portion 13 to fold upward and move closer to the box body side wall 101, which is conducive to the pressure-resistant portion 13 acting as a barrier between the impact object and the box body side wall 101, and is conducive to further buffering the impact of the impact object on the box body side wall 101, thereby achieving the effect of secondary energy absorption.

[0074] Optionally, further reference is made to Figure 7 The second connecting plate 122 includes a weak portion 120. When the box body 100 is hit, the second connecting plate 122 will deform before the first connecting plate 121, and cause the second cavity 12A to collapse to absorb energy.

[0075] Optionally, in some embodiments (not shown), both connecting plates may include a weak portion 120. This arrangement is conducive to accelerating the collapse of the second cavity 12A and facilitating the energy absorption cavity 10 to quickly absorb energy when the box body 100 is impacted.

[0076] like Figures 4 to 7 As shown, in some embodiments, the support portion 11 may further include a triangular cavity, which is located above the first cavity 11A. Providing the support portion 11 with a triangular cavity is conducive to improving the support strength of the support portion 11 and improving the anti-collision ability of the support portion 11, thereby preventing the support portion 11 from collapsing before the deformation portion 12 when the energy absorbing cavity 10 is subjected to force, thereby reducing the energy absorbing effect of the energy absorbing cavity 10.

[0077] According to some embodiments of the present application, optionally, at least one connecting plate includes a bent plate or a curved plate protruding toward the second cavity 12A, and the weak portion 120 includes a bent plate or a curved plate.

[0078] Compared with a flat plate, a bent plate or a curved plate is easy to bend after being subjected to force. Setting the connecting plate as a bent plate or a curved plate protruding toward the second cavity 12A is conducive to forming a weak portion 120 through the bent plate or the curved plate, so as to facilitate the deformation of the deformation portion 12 before the pressure-resistant portion 13 and the support portion 11 when the energy-absorbing cavity 10 is deformed due to force. In addition, the bent plate or the curved plate protruding toward the second cavity 12A is conducive to the two angled plate surfaces of the bent plate or the curved plate being gathered into the second cavity 12A when the energy-absorbing cavity 10 is deformed due to force, so as to make the pressure-resistant portion 13 move closer to the box side wall 101, so as to facilitate the spacing of the impactor and the box side wall 101 to achieve the effect of secondary energy absorption.

[0079] Further references Figure 3 and Figure 4 Along the height direction of the box side wall 101, the first connecting plate 121 is configured as a bent plate protruding toward the second cavity 12A, and the bent plate is an angled plate.

[0080] Optionally, in some embodiments, the bending plate may also be a concave plate, so that a first groove 12 a is formed in the middle of the first connecting plate 121 .

[0081] According to some embodiments of the present application, optionally, the bending plate is an angled plate with an angle ranging from 80° to 160°.

[0082] Within this angle range, it is beneficial to maintain the structural strength of the box body 100 when the energy absorption cavity 10 does not need to absorb energy, and it is also beneficial to ensure that the second cavity 12A collapses before the first cavity 11A and the third cavity 13A when the energy absorption cavity 10 needs to absorb energy.

[0083] Further references Figure 4 , the angle of the angled plate is 120°.

[0084] According to some embodiments of the present application, optionally, along the height direction of the side wall 101 of the box body, the size of the deformation portion 12 is smaller than the sizes of the supporting portion 11 and the anti-pressure portion 13 so that the outer surfaces of the supporting portion 11, the deformation portion 12 and the anti-pressure portion 13 form a first groove 12a, and the weak portion 120 is arranged on the bottom wall of the first groove 12a.

[0085] Further references Figure 5 The first connecting plate 121 of the deformation portion 12 is configured as a weak portion 120, and the first connecting plate 121 is configured as a flat plate arranged in the horizontal direction. The right side surface of the anti-pressure portion 13, the top surface of the first connecting plate 121 and the left side surface of the support portion 11 jointly form a first groove 12a, and the first connecting plate 121 forms a bottom wall of the first groove 12a.

[0086] Optionally, in an embodiment not shown in the figure, the second connecting plate 122 of the deformation portion 12 may also be configured as the weak portion 120, and the manner in which the first groove 12a is formed by the second connecting plate 122 is the same as that of the first connecting plate 121, which will not be repeated.

[0087] The first groove 12a is formed by the support part 11, the pressure-resistant part 13 and the connecting plate, and the weak part 120 is arranged on the bottom wall of the first groove 12a, which is conducive to achieving the collapse of the second cavity 12A before the first cavity 11A and the third cavity 13A when the energy-absorbing cavity 10 is deformed by force, thereby facilitating the energy absorption effect of the deformation part 12. In addition, when the deformation part 12 is deformed, the corresponding parts of the support part 11 and the pressure-resistant part 13 forming the two side walls of the first groove 12a are easier to approach, so that the setting position of the first groove 12a can control the pressure-resistant part 13 to fold in a predetermined direction when the deformation part 12 is deformed.

[0088] According to some embodiments of the present application, optionally, along the height direction of the box side wall 101 , the ratio of the size of the deformation portion 12 to the size of the pressure-resistant portion 13 is less than or equal to 2 / 3.

[0089] Further references Figure 5 Along the height direction of the box side wall 101 , the distance from the bottom surface of the first groove 12 a to the bottom surface of the deformation portion 12 is 2 / 3 of the height dimension of the pressure-resistant portion 13 .

[0090] Setting this size ratio range is conducive to achieving the collapse of the second cavity 12A before the first cavity 11A and the third cavity 13A when the energy absorbing cavity 10 is deformed by force, thereby facilitating the energy absorption effect of the deformation portion 12. In addition, the smaller the ratio of the size of the deformation portion 12 to the size of the pressure-resistant portion 13, the easier it is for the deformation portion 12 to deform, which is conducive to accelerating the collapse of the second cavity 12A, thereby facilitating the rapid achievement of the energy absorption effect.

[0091] According to some embodiments of the present application, optionally, in the direction from the supporting portion 11 to the anti-pressure portion 13, the weak portion 120 includes a thin-walled section of the connecting plate, and the thickness of the thin-walled section is less than the thickness of the rest of the connecting plate.

[0092] Providing the weak portion 120 including a thin-walled section of the connecting plate is beneficial for causing the connecting plate to deform first at the thin-walled section when the box body 100 is impacted, and helps to cause the second cavity 12A to collapse before the first cavity 11A and the third cavity 13A, which is beneficial for achieving the energy absorption effect of the energy absorption cavity 10, thereby playing a buffering role on the battery cells or battery modules in the box body 100.

[0093] According to some embodiments of the present application, optionally, the thickness of one connecting plate is smaller than the thickness of the cavity wall of the third cavity 13A formed by the pressure-resistant portion 13 and the cavity wall of the first cavity 11A formed by the support portion 11, and is smaller than the thickness of another connecting plate, so that the connecting plate with a smaller thickness becomes the weak portion 120 of the deformation portion 12. When the box body 100 is hit, the connecting plate with a smaller thickness deforms first, which helps to collapse the second cavity 12A before the first cavity 11A and the third cavity 13A, and is conducive to achieving the energy absorption effect of the energy absorption cavity 10, thereby playing a buffering role for the battery cells or battery modules in the box body 100. In addition, it is simple and convenient to realize the weak portion 120 by setting a connecting plate with a smaller thickness, and there is no need to increase the processing steps of the deformation portion 12 due to the setting of the weak portion 120.

[0094] Further references Figure 6 and Figure 7 The thin-walled section is disposed on the first connecting plate 121 and / or the second connecting plate 122. The thin-walled section is easily deformed when subjected to force, which is beneficial to reducing the structural strength of the connecting plate including the thin-walled section, so that the second cavity 12A collapses before the first cavity 11A and the third cavity 13A when the box body 100 is impacted.

[0095] Optionally, in some embodiments, the thickness of the thin-walled section may change gradually. In other embodiments, the thickness of the thin-walled section may also remain consistent.

[0096] According to some embodiments of the present application, optionally, in a direction from the supporting portion 11 to the anti-pressure portion 13 , the thin-walled section is located in the middle and / or edge of the connecting plate.

[0097] The thin-walled section is located in the middle of the connecting plate, which is conducive to reducing the structural strength of the middle of the connecting plate, so that the second cavity 12A begins to collapse from the middle when the box body 100 is hit. The thin-walled section is located at the edge of the connecting plate, which is conducive to reducing the connection strength between the deformation part 12 and the support part 11 or the pressure-resistant part 13, thereby enhancing the energy absorption effect when the energy absorption cavity 10 is deformed by force.

[0098] Further references Figure 6 and Figure 7 The thin-walled section includes a first thin-walled section 1201. In the direction from the support portion 11 to the pressure-resistant portion 13, the first thin-walled section 1201 is located in the middle of the connecting plate, which is beneficial to reducing the structural strength of the middle of the connecting plate, so that the second cavity 12A collapses from the middle when the box body 100 is hit.

[0099] Further references Figures 4 to 6 , the thin-walled section also includes a second thin-walled section 1202. The second thin-walled section 1202 is arranged at the end of the second connecting plate 122 close to the supporting portion 11. When the box body 100 is impacted, the deformation of the second thin-walled section 1202 is conducive to driving the deformation portion 12 to deform upward and close to the box body side wall 101, so that when the second cavity 12A collapses, the pressure-resistant portion 13 connected to the side of the deformation portion 12 away from the box body side wall 101 is folded upward and close to the box body side wall 101, which is conducive to the pressure-resistant portion 13 forming a barrier between the impact object and the box body side wall 101 to play a buffering role.

[0100] Further references Figure 6 and Figure 7 , the thin-walled section also includes a third thin-walled section 1203. The third thin-walled section 1203 is arranged at the end of the first connecting plate 121 close to the pressure-resistant portion 13. The third thin-walled section 1203 is conducive to making the connection strength between the first connecting plate 121 and the pressure-resistant portion 13 smaller than the connection strength between the first connecting plate 121 and the support portion 11, which is conducive to strengthening the support strength of the support portion 11, thereby helping to strengthen the protective effect of the support portion 11 on the box side wall 101.

[0101] According to some embodiments of the present application, optionally, in a direction from the supporting portion 11 to the anti-pressure portion 13 , a surface of the thin-walled section that is away from and / or close to the second cavity 12A forms a groove in the middle of the connecting plate.

[0102] Further references Figure 6 and Figure 7 , along the direction from the support portion 11 to the pressure-resistant portion 13, the thickness of the first thin-walled section 1201 gradually decreases and then gradually increases. Figure 6 As shown, the first thin-walled section 1201 forms a groove extending along the first direction A on the upper surface of the first connecting plate 121. Figure 7 As shown, the first thin-walled section 1201 forms a groove extending along the first direction A on the bottom surface of the second connecting plate 122 .

[0103] Optionally, in some embodiments (not shown), the first thin-walled section 1201 forms a groove extending along the first direction A on the lower surface of the first connecting plate 121 or on the upper surface of the second connecting plate 122 .

[0104] From the support portion 11 to the pressure-resistant portion 13, the surface of the thin-walled section that is away from or close to the second cavity 12A forms a groove in the middle of the connecting plate, which is beneficial to stress concentration in the groove when the box body 100 is hit, thereby facilitating rapid deformation.

[0105] According to some embodiments of the present application, optionally, in the direction from the supporting portion 11 to the anti-pressure portion 13, the surface of the thin-walled section away from the second cavity 12A gradually approaches the second cavity 12A from the rest of the connecting plate toward the edge of the connecting plate.

[0106] Further references Figures 4 to 6 , along the direction from the supporting portion 11 to the anti-pressure portion 13, the thickness of the second thin-walled section 1202 gradually increases.

[0107] Further references Figure 7 , along the direction from the supporting portion 11 to the anti-pressure portion 13, the thickness of the third thin-walled section 1203 gradually decreases.

[0108] According to some embodiments of the present application, optionally, the surface of the thin-walled section close to the second cavity 12A gradually moves away from the second cavity 12A from the rest of the connecting plate toward the edge of the connecting plate.

[0109] From the supporting portion 11 to the anti-pressure portion 13, the surface of the thin-walled section facing away from the second cavity 12A gradually approaches the second cavity 12A from the rest of the connecting plate toward the edge of the connecting plate and / or the surface of the thin-walled section close to the second cavity 12A gradually moves away from the second cavity 12A from the rest of the connecting plate toward the edge of the connecting plate. This arrangement of the thin-walled section can simply and conveniently achieve the arrangement of the weak portion 120 of the deformation portion 12 by gradually reducing the thickness of the edge of the connecting plate.

[0110] According to some embodiments of the present application, optionally, the deformation portion 12 further includes a local reinforcement member 123. The local reinforcement member 123 is located in the second cavity 12A and is configured to form an acute angle with the connecting plate. The local reinforcement member 123 is, for example, a reinforcement plate.

[0111] Since the deformation part 12 includes the weak part 120, the weak part 120 weakens the structural strength of the deformation part 12. The local reinforcement member 123 is provided in the second cavity 12A to improve the local structural strength and rigidity of the deformation part 12, so that the deformation part 12 has sufficient bearing capacity before the second cavity 12A collapses, thereby preventing the deformation part 12 from being deformed by force before the energy absorption cavity 10 needs to absorb energy. The local reinforcement member 123 is also conducive to maintaining the local shape after the second cavity 12A collapses, so as to better maintain the deformed shape together with the support part 11 and the pressure-resistant part 13 after the impact, and to enable the deformed energy absorption cavity 10 to continue to be supported on the outside of the box side wall 101, and to assume the secondary energy absorption function.

[0112] Optionally, in some embodiments, the support portion 11 and / or the pressure-resistant portion 13 may also include a reinforcing member to increase the structural strength of the first cavity 11A and / or the third cavity 13A.

[0113] According to some embodiments of the present application, optionally, one end of the local reinforcing member 123 is connected to the connection between the support portion 11 and one of the two connecting plates, and the other end is connected to the connection between the anti-pressure portion 13 and the other of the two connecting plates.

[0114] Further references Figure 6 and Figure 7 The local reinforcing member 123 extends in the first direction in the second cavity 12A and tilts rightward in the second cavity 12A. The edge of the local reinforcing member 123 that is close to the support portion 11 and extends in the first direction A is connected to the connection between the support portion 11 and the first connecting plate 121. The edge of the local reinforcing member 123 that is close to the anti-pressure portion 13 and extends in the first direction A is connected to the second connecting plate 122, and the connection position is close to the anti-pressure portion 13.

[0115] This arrangement is beneficial for the local reinforcing member 123, the support portion 11 and the second connecting plate 122 to support each other stably and form a spatial structure that protects the support portion 11, thereby facilitating the deformation of the weak portion 120 before the support portion 11 when the box body 100 is impacted, so as to achieve an energy absorption effect.

[0116] In other embodiments (not shown), the local reinforcing member 123 may also be arranged to be left-leaning in the second cavity 12A so that the local reinforcing member 123, the second connecting plate 122 and the anti-pressure part 13 can stably support each other and form a spatial structure that protects the anti-pressure part 13.

[0117] According to some embodiments of the present application, optionally, along the height direction of the box side wall 101, the energy absorbing cavity 10 is connected to one end of the box side wall 101 close to the box bottom wall 103. The energy absorbing cavity 10 is configured to fold the pressure-resistant portion 13 toward the end close to the box side wall 101 and opposite to the box bottom wall 103 during the force deformation process.

[0118] Further references Figures 4 to 6 The energy absorbing cavity 10 is connected to the left bottom of the box side wall 101. The energy absorbing cavity 10 is configured to fold the pressure-resistant portion 13 toward the box side wall 101 and upward during the force deformation process.

[0119] The pressure-resistant portion 13 is folded toward the end of the box side wall 101 opposite to the box bottom wall 103. When the pressure-resistant portion 13 forms a barrier together with the support portion 11, it covers the outer side of the box side wall 101 as much as possible, thereby increasing the projection area of ​​the barrier on the box side wall 101, which is conducive to better achieving the effect of secondary energy absorption.

[0120] According to some embodiments of the present application, optionally, the box body 100 further includes a flange 102 protruding toward the outside of the box body side wall 101 and arranged at an end opposite to the box body bottom wall 103 along the height direction of the box body side wall 101. The box body side wall 101, the support portion 11 and the flange 102 form a secondary energy absorption space 14A. The energy absorption cavity 10 is configured to move the pressure-resistant portion 13 into the secondary energy absorption space 14A when deformed by force.

[0121] Further references Figures 4 to 6 The flange 102 is vertically connected to the top of the box side wall 101. A secondary energy absorption space 14A is formed between the flange 102, the box side wall 101 and the triangular cavity of the support portion 11. The weak portion 120 is disposed on the first connecting plate 121.

[0122] When the energy-absorbing cavity 10 is deformed by force, the second cavity 12A collapses before the first cavity 11A and the third cavity 13A due to the weak portion 120. The weak portion 120 causes the pressure-resistant portion 13 to move toward the secondary energy-absorbing space 14A, and the flange 102 helps to shrink the pressure-resistant portion 13 in the secondary energy-absorbing space 14A, and finally forms a barrier between the impact object and the box side wall 101, achieving the effect of secondary energy absorption, which is conducive to further improving the energy absorption effect of the energy-absorbing cavity 10. In addition, the secondary energy-absorbing space 14A is formed by using the box side wall 101, the support portion 11 and the flange 102, and the arrangement is simple and compact, which is conducive to saving structural space.

[0123] According to some embodiments of the present application, optionally, a portion of the pressure-resistant portion 13 is configured to match the shape of at least a portion of the secondary energy absorption space 14A.

[0124] Further references Figures 4 to 6 , a right angle is formed between the flange 102 and the side wall 101 of the box body, and the top surface of the pressure-resistant part 13 and the side surface away from the deformation part 12 form a right angle, so that when the pressure-resistant part 13 is impacted into the secondary energy absorption space 14A, part of the pressure-resistant part 13 can fill the space at the right angle formed between the flange 102 and the side wall 101 of the box body.

[0125] This arrangement is conducive to forming a stable supporting structure of part of the anti-pressure portion 13 in the secondary energy absorption space 14A, thereby helping to improve the effect of secondary energy absorption.

[0126] Alternatively, if Figures 3 to 7 As shown, in some embodiments, the deformation portion 12 includes a weak portion 120, and the structural design of the weak portion 120 makes the structural strength of the deformation portion 12 (for example, compressive strength, bending strength, hardness, shear strength, etc.) less than the structural strength of the support portion 11 and the anti-pressure portion 13, so that when the box 100 of the battery 1 is impacted, the weak portion 120 causes the deformation portion 12 to deform before the support portion 11 and the anti-pressure portion 13, thereby achieving an energy absorption effect. In other embodiments (not shown), the material of the weak portion 120 can also be designed so that the material properties of the weak portion 120 (for example, material hardness, material stiffness, etc.) are lower than the material properties of other parts of the energy absorption cavity 10, so that when the box 100 of the battery 1 is impacted, the weak portion 120 causes the deformation portion 12 to deform before the support portion 11 and the anti-pressure portion 13, thereby achieving an energy absorption effect.

[0127] According to some embodiments of the present application, the present application further provides an electric device, comprising the battery described in any of the above schemes, and the battery is configured to provide power to the electric device.

[0128] The power-consuming device may be any of the aforementioned devices or systems using batteries.

[0129] The following combination Figures 1 to 7 The battery 1 and the electrical equipment having the battery 1 according to some embodiments of the present application are described in more detail.

[0130] Please refer to Figure 1 . Figure 1 The schematic diagram of the structure of the electric device vehicle D provided in some embodiments of the present application. The vehicle D can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. Figure 2 The vehicle D is provided with a battery 1 inside. The battery 1 is provided at the bottom of the vehicle D, or at the head or tail (not shown). The battery 1 can be used to power the vehicle D, for example, as an operating power source of the vehicle D.

[0131] In some embodiments of the present application, the battery 1 can not only serve as an operating power source for the vehicle D, but also serve as a driving power source for the vehicle D, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle D.

[0132] Please refer to Figure 2 . Figure 2 The exploded structure diagram of the battery 1 provided in some embodiments of the present application. The battery 1 is in the form of a battery pack, and its battery box includes a box body 100 (the energy absorption cavity 10 is not shown), a box cover 200 buckled on the box body 100, and a plurality of battery cells 20 accommodated in an accommodation space C surrounded by the box body 100 and the box cover 200.

[0133] like Figure 2 As shown, in the above embodiment, the box body 100 and the box cover 200 are rectangular parallelepiped as a whole. In embodiments not shown in the figure, the box body 100 can also be other shapes, such as a cylinder. In some embodiments, the box body 100 can be used as a part of the chassis structure of the vehicle. For example, part of the box body 100 can become at least a part of the floor of the vehicle, or part of the box body 100 can become at least a part of the crossbeam and longitudinal beam of the vehicle.

[0134] The battery cell 20 mainly includes a battery cell, a shell and an end cap assembly. The battery cell may include one or two or more electrode assemblies. The battery cell is encapsulated in the housing space of the shell through the end cap of the end cap assembly, and the housing space is filled with electrolyte. The electrode assembly is arranged in the housing space of the shell. The electrode assembly is the component in the battery cell 20 where the electrochemical reaction occurs.

[0135] In the battery 1, there are multiple battery cells 20, and the multiple battery cells 20 can be connected in series, in parallel, or in mixed connection. Mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 can be directly connected in series, in parallel, or in mixed connection, and then the whole formed by the multiple battery cells 20 is accommodated in the accommodation space C.

[0136] like Figure 2 As shown, the battery 1 may be a battery pack 2 formed by connecting a plurality of battery cells 20 in series, in parallel or in mixed connection. The battery pack 2 may be in the form of a battery module. The plurality of battery packs 2 are then connected in series, in parallel or in mixed connection to form a whole, and are accommodated in the accommodation space C. The battery 1 may also include other structures, for example, the battery 1 may also include a busbar component for realizing electrical connection between the plurality of battery cells 20.

[0137] In the battery 1, in order to ensure the safety and working performance of the battery cell 20 in the battery 1, a heat exchange component (not shown) is provided in the accommodation space C of the battery 1. The heat exchange component contains coolant to enable the heat exchange component to exchange heat with the battery cell 20, thereby improving the safety and working reliability of the battery 1.

[0138] like Figure 3 As shown, in this embodiment, the box body 100 includes two energy absorption cavities 10, and the two energy absorption cavities 10 are respectively connected to the outer sides of two box body side walls 101 of the box body 100 that are opposite to each other along the second direction B. The energy absorption cavity 10 extends along the first direction A. The energy absorption cavity 10 is integrally formed with the connected box body side wall 101. In the case where the battery 1 is impacted, the energy absorption cavity 10 is conducive to absorbing energy to buffer the impact of the impact force on the battery 1, which is conducive to avoiding problems such as short circuit or spontaneous combustion of the battery 1 due to impact, and improving the safety performance of the battery 1.

[0139] by Figure 3 Taking the energy absorbing cavity 10 located on the left side of the box body 100 as an example, the energy absorbing cavity 10 includes a supporting portion 11 , a deforming portion 12 and a pressure-resistant portion 13 .

[0140] The support part 11 is connected to the left side of the box side wall 101 and is integrally formed with the box side wall 101. The support part 11 includes a square first cavity 11A and a fourth cavity 11B located above the first cavity 11A. The fourth cavity 11B is a right-angled triangular cavity, and the top wall of the first cavity 11A and the box side wall 101 respectively form two right-angled surfaces of the fourth cavity 11B.

[0141] The deformation part 12 is connected to the left side of the support part 11 and is integrally formed with the support part 11. The deformation part 12 includes a first connecting plate 121 and a second connecting plate 122, and the first connecting plate 121 is located above the second connecting plate 122. The support part 11, the first connecting plate 121, the second connecting plate 122 and the pressure-resistant part 13 form a second cavity 12A. The second cavity 12A is located on the left side of the first cavity 11A.

[0142] The pressure-resistant portion 13 is connected to the left side of the deformation portion 12 and is integrally formed with the deformation portion 12. The third cavity 13A of the pressure-resistant portion 13 is a square cavity and is located on the left side of the second cavity 12A.

[0143] One of the first connecting plate 121 and the second connecting plate 122 includes a weak portion 120, and the weak portion 120 is configured to cause the second cavity 12A to collapse before the first cavity 11A, the third cavity 13A and the fourth cavity 11B when the energy absorption cavity 10 is deformed by force, which is beneficial to achieve the energy absorption effect, reduce the impact of the impact on the battery cells or battery modules in the box body 100, and help avoid short circuit or spontaneous combustion of the battery 1, thereby helping to improve the safety performance of the battery 1 and the electrical equipment using the battery 1.

[0144] like Figure 3As shown, the box body 100 also includes a flange 102 vertically connected to the left side of the top of the box body side wall 101. A secondary energy absorption space 14A is formed between the flange 102, the box body side wall 101 and the top wall of the fourth cavity. In the case where the first connecting plate 121 includes a weak portion 120, the deformation of the deformation portion 12 under force can cause the pressure-resistant portion 13 to move into the secondary energy absorption space 14A, so that the pressure-resistant portion 13 can separate the impactor from the box body side wall 101, so that the impactor cannot directly hit the box body side wall 101, thereby achieving the effect of secondary energy absorption. In addition, the height dimension of the pressure-resistant portion 13 is consistent with the width dimension of the flange 102. This arrangement is conducive to the partial pressure-resistant portion 13 filling the right-angle space of the secondary energy absorption space 14A, thereby forming a more stable support structure, which is conducive to enhancing the effect of secondary energy absorption.

[0145] The energy absorbing cavity 10 on the right side of the box body 100 has the same structure as the energy absorbing cavity 10 on the left side of the box body 100 , and the two energy absorbing cavities 10 are symmetrically arranged on the left and right sides of the box body 100 .

[0146] Figure 3 The energy absorbing cavity 10 is Figure 4 The structure of the energy absorbing cavity 10 shown in the figure may also be replaced by the following in other embodiments: Figures 5 to 7 The structure of the energy absorbing cavity 10 is shown in FIG.

[0147] Four embodiments of the deformation portion 12 of the energy absorbing cavity 10 are described in detail below:

[0148] Figure 4 As shown, in this embodiment, the first connecting plate 121 of the deformation part 12 includes a weak part 120, and the weak part 120 is a bent plate, and the plate thickness of the bent plate is less than the cavity wall thickness of the corresponding cavity of the pressure-resistant part 13 and the support part 11, and is also less than the thickness of the second connecting plate 122, thereby forming the most easily deformed weak part 120. The bent plate is an angular plate protruding toward the second cavity 12A and to the right. The angle of the bent plate is 120°. The right edge of the bent plate is connected to the bottom edge of the top wall of the fourth cavity, and the right folded plate of the bent plate is consistent with the inclination angle of the top wall of the fourth cavity 11B, which is conducive to strengthening the connection strength between the right folded plate of the bent plate and the support part 11, so as to facilitate the left folded plate of the bent plate to move close to the right folded plate when the second cavity 12A collapses, and then facilitates the driving of the pressure-resistant part 13 to move into the secondary energy absorption space 14A to achieve the effect of secondary energy absorption.

[0149] The part of the second connecting plate 122 of the deformation part 12 connected to the supporting part 11 gradually becomes thinner from left to right to form a second thin-walled section 1202 as a weak part 120, which is beneficial for bending and deformation or direct breakage between the second connecting plate 122 and the supporting part 11 when subjected to impact force, and is beneficial for realizing the folding of the pressure-resistant part 13 upward and in the direction close to the side wall 101 of the box body, which is beneficial for further realizing the movement of the pressure-resistant part 13 into the secondary energy absorption space 14A.

[0150] like Figure 5 As shown, in this embodiment, the first connecting plate 121 of the deformation part 12 is lower than the pressure-resistant part 13 and the support part 11, so that a first groove 12a with an opening facing upward is formed between the support part 11, the first connecting plate 121 and the pressure-resistant part 13. The thickness of the first connecting plate 121 is less than the cavity wall thickness of the corresponding cavity of the pressure-resistant part 13 and the support part 11, and is also less than the thickness of the second connecting plate 122, so as to form a weak part 120 that is most easily deformed. The height dimension of the first connecting plate 121 is 2 / 3 of the height dimension of the pressure-resistant part 13. In the left-right direction, the center line of the second cavity 12A is located to the right of the center line of the energy-absorbing cavity 10, so as to facilitate the folding of the pressure-resistant part 13 into the secondary energy-absorbing space 14A.

[0151] Under the impact force, the first groove 12a is depressed downward and the second cavity 12A collapses, thereby achieving the energy absorption effect. In addition, the pressure-resistant portion 13 can be folded upward into the secondary energy absorption space 14A, thereby achieving the secondary energy absorption effect.

[0152] The part of the second connecting plate 122 of the deformation part 12 connected to the support part 11 is gradually thinned from left to right to form a second thin-walled section 1202 as a weak part 120, which is beneficial for bending and deformation or direct breakage between the second connecting plate 122 and the support part 11 when subjected to impact force, and is beneficial for further realizing the movement of the pressure-resistant part 13 into the secondary energy absorption space 14A.

[0153] like Figure 6 As shown, in this embodiment, the first connecting plate 121 of the deformation part 12 includes a first thin-walled section 1201 as a weak portion 120. Along the left-right direction, the first thin-walled section 1201 is located in the middle of the first connecting plate 121. A groove is formed on the upper surface of the first thin-walled section 1201. The deformation part 12 includes a local reinforcement member 123, which is located in the second cavity 12A and is inclined in the direction from the lower left to the upper right. Along the left-right direction, the center line of the second cavity 12A is located on the right side of the center line of the energy absorption cavity 10, so as to facilitate the folding of the anti-pressure part 13 into the secondary energy absorption space 14A.

[0154] Under the impact force, the first thin-walled section 1201 is deformed or broken downward and causes the second cavity 12A to collapse, thereby achieving the energy absorption effect. In addition, the pressure-resistant portion 13 can be folded upward into the secondary energy absorption space 14A, thereby achieving the secondary energy absorption effect.

[0155] The part of the second connecting plate 122 of the deformation part 12 connected to the support part 11 is gradually thinned from left to right to form a second thin-walled section 1202 as a weak part 120, which is beneficial for bending and deformation or direct breakage between the second connecting plate 122 and the support part 11 when subjected to impact force, and is beneficial for further realizing the movement of the pressure-resistant part 13 into the secondary energy absorption space 14A.

[0156] like Figure 7 As shown, in this embodiment, the second connecting plate 122 of the deformable portion 12 includes a first thin-walled section 1201 as the weak portion 120. In the left-right direction, the first thin-walled section 1201 is located in the middle of the second connecting plate 122. A groove is formed on the lower surface of the first thin-walled section 1201.

[0157] The deformation portion 12 includes a local reinforcement member 123, which is located in the second cavity 12A and is arranged obliquely from the lower left to the upper right. In the direction from the support portion 11 to the pressure-resistant portion 13, the first connecting plate 121 includes a third thin-walled section 1203 with a gradually reduced thickness as a weak portion 120. The third thin-walled section 1203 is provided to make the connection strength between the first connecting plate 121 and the support portion 11 greater than the connection strength between the first connecting plate 121 and the pressure-resistant portion 13, which is conducive to reducing the deformation of the support portion 11 after the second cavity 12A collapses, thereby facilitating the impact of the impact force on the box side wall 101.

[0158] When subjected to impact force, the first thin-walled section 1201 bulges upward, deforms, or breaks, and causes the second cavity 12A to collapse, thereby achieving an energy absorption effect.

[0159] The portion of the second connecting plate 122 of the deformation portion 12 connected to the support portion 11 is gradually thinned from left to right to form a second thin-walled section 1202 as a weak portion 120, which is beneficial for the second connecting plate 122 and the support portion 11 to bend and deform or directly break when subjected to impact force, thereby promoting the collapse of the second cavity 12A to quickly achieve an energy absorption effect.

[0160] The above description of various embodiments tends to emphasize the differences between the various embodiments. The same or similar parts can be referenced to each other, and for the sake of brevity, they will not be repeated in this article.

[0161] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present disclosure rather than to limit it. Although the present disclosure has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present disclosure can still be modified or some technical features can be replaced by equivalents, which should all be included in the scope of the technical solution for protection requested by the present disclosure.

Claims

1. A battery, comprising a box (100), the box (100) comprising a box side wall (101) and an energy absorption cavity (10) arranged outside the box side wall (101), characterized in that: The energy absorbing cavity (10) comprises: A support portion (11) connected to the outside of the box side wall (101); A deformation portion (12) connected to a side of the support portion (11) away from the box side wall (101); A pressure-resistant portion (13) connected to a side of the deformation portion (12) away from the support portion (11); The deformation portion (12) comprises a weak portion (120), and the deformation portion (12) is configured to deform before the pressure-resistant portion (13) and the support portion (11) when the energy-absorbing cavity (10) is deformed due to force, and to cause the pressure-resistant portion (13) to fold toward the box side wall (101).

2. The battery according to claim 1, characterized in that The support portion (11) and the box side wall (101) form a first cavity (11A); The deforming portion (12) comprises two connecting plates spaced apart and arranged opposite to each other along the height direction of the box body side wall (101), at least one of the two connecting plates comprises the weak portion (120), and the supporting portion (11), the two connecting plates and the pressure-resistant portion (13) form a second cavity (12A); The pressure-resistant portion (13) comprises a third cavity (13A); Wherein, when the energy absorbing cavity (10) is deformed by force, the second cavity (12A) collapses before the first cavity (11A) and the third cavity (13A).

3. The battery according to claim 2, characterized in that At least one of the connecting plates comprises a bent plate or a curved plate protruding toward the second cavity (12A), and the weak portion (120) comprises the bent plate or the curved plate.

4. The battery according to claim 3, characterized in that The bending plate is an angular plate with an included angle ranging from 80° to 160°.

5. The battery according to claim 2, characterized in that Along the height direction of the box body side wall (101), the size of the deformation portion (12) is smaller than the size of the support portion (11) and the anti-pressure portion (13), so that the outer surfaces of the support portion (11), the deformation portion (12) and the anti-pressure portion (13) form a first groove (12a), and the weak portion (120) is arranged on the bottom wall of the first groove (12a).

6. The battery according to claim 5, characterized in that Along the height direction of the box body side wall (101), the ratio of the size of the deformation portion (12) to the size of the pressure-resistant portion (13) is less than or equal to 2 / 3.

7. The battery according to claim 2, characterized in that In a direction from the supporting portion (11) to the anti-pressure portion (13), the weak portion (120) comprises a thin-walled section of the connecting plate, the thickness of the thin-walled section being smaller than the thickness of the rest of the connecting plate; or The thickness of one of the connecting plates is smaller than the thickness of the cavity wall of the pressure-resistant portion (13) forming the first cavity (11A) and the cavity wall of the support portion (11) forming the third cavity (13A), and is smaller than the thickness of the other connecting plate.

8. The battery according to claim 7, characterized in that In the direction from the supporting portion (11) to the anti-pressure portion (13), the thin-walled section is located in the middle and / or at the edge of the connecting plate.

9. The battery according to claim 7, characterized in that In the direction from the supporting portion (11) to the pressure-resistant portion (13), the surface of the thin-walled section facing away from and / or close to the second cavity (12A) forms a groove in the middle of the connecting plate; and / or In the direction from the supporting portion (11) to the pressure-resistant portion (13), the surface of the thin-walled section facing away from the second cavity (12A) gradually approaches the second cavity (12A) from the rest of the connecting plate toward the edge of the connecting plate and / or the surface of the thin-walled section close to the second cavity (12A) gradually moves away from the second cavity (12A) from the rest of the connecting plate toward the edge of the connecting plate.

10. The battery according to claim 2, characterized in that The deformation portion (12) further comprises a local reinforcement component (123), wherein the local reinforcement component (123) is located in the second cavity (12A) and is configured to form an acute angle with the connection plate.

11. The battery according to claim 10, characterized in that One end of the local reinforcement member (123) is connected to the connection between the support portion (11) and one of the two connection plates, and the other end is connected to the connection between the pressure-resistant portion (13) and the other of the two connection plates.

12. The battery according to any one of claims 1 to 11, characterized in that Along the height direction of the box side wall (101), the energy absorbing cavity (10) is connected to one end of the box side wall (101) close to the box bottom wall (103), and the energy absorbing cavity (10) is configured to fold the pressure-resistant portion (13) toward an end close to the box side wall (101) and opposite to the box bottom wall (103) during deformation under force.

13. The battery according to claim 12, characterized in that The box body (100) further comprises a flange (102) which is arranged at an end opposite to the box body bottom wall (103) along the height direction of the box body side wall (101) and protrudes toward the outside of the box body side wall (101); the box body side wall (101), the support portion (11) and the flange (102) form a secondary energy absorption space (14A); The energy absorbing cavity (10) is configured to move the pressure-resistant portion (13) into the secondary energy absorbing space (14A) when deformed by force.

14. The battery according to claim 13, characterized in that Part of the anti-pressure portion (13) is configured to match the shape of at least part of the secondary energy absorption space (14A).

15. An electrical equipment, characterized in that: The battery comprises the battery according to any one of claims 1 to 14, wherein the battery is configured to provide power to the power-consuming device.

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