Battery device

Abstract

The utility model relates to the technical field of batteries, and provides a battery device which comprises a battery, the battery comprises two opposite large surfaces and a side surface arranged around the circumferential direction of the large surfaces, and a pressure relief part is arranged on the side surface; the bracket is arranged on the battery and covers the pressure relief part, and the bracket is of a non-continuous structure in the extension direction of surrounding the circumferential direction of the large surface along the side surface so as to cover a part of the side surface, so that when the battery is expanded, the bracket is not restrained too tightly, and the part, provided with the pressure relief part, of the battery can still be ensured to generate certain deformation; therefore, the degree of freedom of the battery is released, so that the stress is concentrated on the pressure relief part on the side surface, the valve opening pressure and the valve opening position of the pressure relief part can be accurately controlled, and the safe use performance of the battery device can be reliably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery device. Background Art

[0002] In the related art, the battery may include a pressure relief structure, which explodes when the internal pressure of the battery is too high, thereby releasing the internal pressure of the battery. In order to prevent the pressure relief structure from being damaged, an external structure may be used to protect the pressure relief structure. However, due to the limitation of the external structure, the normal explosion of the pressure relief structure may be affected. Utility Model Content

[0003] The utility model provides a battery device to improve the use performance of the battery device.

[0004] The utility model provides a battery device, comprising:

[0005] A battery, the battery comprising two opposite large surfaces and side surfaces arranged in a circumferential direction around the large surfaces, wherein a pressure relief portion is arranged on the side surfaces;

[0006] The bracket is arranged on the battery and covers the pressure relief portion. In the extension direction of the side surface around the large surface in the circumferential direction, the bracket is a discontinuous structure to cover a part of the side surface.

[0007] The battery device of the embodiment of the utility model includes a battery and a bracket, and the bracket is arranged on the battery, thereby forming a support and protection for the battery. The battery includes two large surfaces opposite to each other and a side surface arranged around the large surface, and a pressure relief portion is arranged on the side surface, so that after the internal pressure of the battery reaches a certain height, the pressure relief portion can burst open, thereby forming a safety protection for the battery. The bracket covers the pressure relief portion, and thus the bracket can also form a protection for the pressure relief portion to prevent the pressure relief portion from being damaged by collision. In the extension direction of the side surface surrounding the large surface, the bracket is a discontinuous structure to cover a part of the side surface, so that when the battery swells, the bracket will not be constrained too tightly, and it can still ensure that the part of the battery with the pressure relief portion is deformed to a certain extent, releasing the battery's degree of freedom, so that the stress is concentrated on the pressure relief portion of the side surface, so that the valve opening pressure and valve opening position of the pressure relief portion can be accurately controlled, thereby reliably improving the safe use performance of the battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to better understand the present disclosure, reference may be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, related elements or components may have different arrangements as known in the art. In addition, in the drawings, the same reference numerals represent the same or similar components in each drawing. Among them:

[0009] Figure 1 is a schematic structural diagram of a battery device according to an exemplary embodiment;

[0010] Figure 2 is a schematic structural diagram of a battery device according to another exemplary embodiment;

[0011] Figure 3 is a schematic diagram of a partial structure of a battery device according to an exemplary embodiment;

[0012] Figure 4 is a schematic diagram of a partial exploded structure of a battery device according to an exemplary embodiment;

[0013] Figure 5 is a schematic diagram of a battery structure of a battery device according to a first exemplary embodiment;

[0014] Figure 6 is a schematic diagram of a battery structure of a battery device according to a second exemplary embodiment;

[0015] Figure 7 is a schematic diagram of a battery structure of a battery device according to a third exemplary embodiment.

[0016] The following are the descriptions of the reference numerals:

[0017] 10. Battery; 11. Large surface; 12. Side surface; 13. Pressure relief portion; 14. Middle portion; 15. End portion; 16. Transition portion; 20. Bracket; 21. First portion; 22. Second portion; 23. Third portion; 24. Weak portion; 25. Depression; 26. Support flange; 27. Fixed section; 28. Movable section; 29. ​​Deformation guide; 291. Notch; 30. Pole assembly. DETAILED DESCRIPTION

[0018] The following will be combined with the accompanying drawings in the exemplary embodiments of the present disclosure to clearly and completely describe the technical solutions in the exemplary embodiments of the present disclosure. The exemplary embodiments described herein are only for illustrative purposes and are not intended to limit the scope of protection of the present disclosure. Therefore, it should be understood that various modifications and changes can be made to the exemplary embodiments without departing from the scope of protection of the present disclosure.

[0019] In the description of the present disclosure, unless otherwise clearly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; the term "plurality" refers to two or more; the term "and / or" includes any and all combinations of one or more associated listed items. In particular, reference to "the / the" object or "an" object is also intended to indicate one of a possible plurality of such objects.

[0020] Unless otherwise specified or explained, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

[0021] Further, in the description of the present disclosure, it should be understood that the directional words such as "upper", "lower", "inner", "outer" and the like described in the exemplary embodiments of the present disclosure are described at the angles shown in the accompanying drawings and should not be understood as limitations on the exemplary embodiments of the present disclosure. It should also be understood that, in the context, when it is mentioned that an element or feature is connected to another element (one or more) "upper", "lower", or "inner", "outer", it can not only be directly connected to the other (one or more) elements "upper", "lower", "inner", "outer", but also can be indirectly connected to the other (one or more) elements "upper", "lower", "inner", "outer" through an intermediate element.

[0022] An embodiment of the present utility model provides a battery device, please refer to Figures 1 to 7 The battery device includes: a battery 10, the battery 10 includes two opposite large surfaces 11 and a side surface 12 arranged in a circumferential direction around the large surface 11, and a pressure relief portion 13 is arranged on the side surface 12; a bracket 20, the bracket 20 is arranged on the battery 10 and covers the pressure relief portion 13, and along the extension direction of the side surface 12 in the circumferential direction around the large surface 11, the bracket 20 is a discontinuous structure to cover a portion of the side surface 12.

[0023] The battery device of one embodiment of the utility model comprises a battery 10 and a bracket 20, wherein the bracket 20 is arranged on the battery 10, thereby forming a support and protection for the battery 10. The battery 10 comprises two opposite large surfaces 11 and a side surface 12 arranged around the large surface 11, and a pressure relief portion 13 is arranged on the side surface 12, so that after the internal pressure of the battery 10 reaches a certain height, the pressure relief portion 13 can explode, thereby forming a safety protection for the battery 10. The bracket 20 is arranged to cover the pressure relief portion 13, thereby also allowing the bracket 20 to form a protection for the pressure relief portion 13, thereby preventing the pressure relief portion 13 from being damaged by collision. In the extension direction of the side surface 12 surrounding the large surface 11, the bracket 20 is a discontinuous structure to cover a portion of the side surface 12, so that when the battery 10 swells, the bracket 20 will not be constrained too tightly, and it can still ensure that the portion of the battery 10 provided with the pressure relief portion 13 undergoes a certain deformation, thereby releasing the freedom of the battery 10, so that the stress is concentrated on the pressure relief portion 13 of the side surface 12, and the valve opening pressure and valve opening position of the pressure relief portion 13 can be accurately controlled, thereby reliably improving the safe use performance of the battery device.

[0024] It should be noted that, combined with Figures 1 to 4 As shown, the battery device includes a battery 10 and a bracket 20. The bracket 20 is arranged on the battery 10, so that the bracket 20 can protect the battery 10. When the batteries are grouped, the bracket 20 can support and protect the battery 10.

[0025] like Figures 5 to 7 As shown, the battery 10 includes two opposite large surfaces 11 and side surfaces 12 arranged circumferentially around the large surfaces 11 . The side surfaces 12 can be considered as a circumferentially closed structure, that is, the side surfaces 12 are arranged around the large surfaces 11 .

[0026] like Figures 4 to 7 As shown, a pressure relief portion 13 is provided on the side surface 12. When the battery devices are grouped, the stacking direction of the battery devices can be perpendicular to the large surface 11 of the battery 10, that is, the large surfaces 11 of adjacent battery devices are relatively arranged. After the pressure relief portion 13 explodes, it can also reduce the impact of the ejected gas on the adjacent battery 10.

[0027] Combination Figure 1 and Figure 2As shown, the bracket 20 covers the pressure relief portion 13. In the extension direction of the side surface 12 around the large surface 11 in the circumferential direction, the bracket 20 is a discontinuous structure to cover a part of the side surface 12, that is, the bracket 20 is a circumferential non-enclosed structure, so that when the battery 10 swells, the bracket 20 will not be constrained too tightly, and the battery 10 can still be guaranteed to undergo a certain deformation. For example, the battery shell of the battery 10 undergoes a certain deformation, releasing the freedom of the battery shell, so that the stress is concentrated on the pressure relief portion 13 on the side surface 12, and the valve opening pressure and valve opening position can be accurately controlled, that is, the pressure relief portion 13 can be accurately exploded, thereby ensuring the safe use performance of the battery device. Compared with the use of a circumferential non-enclosed bracket, it is too constrained for the battery. When the battery is thermally runaway, it is difficult for its side surface to deform, and the valve opening position and valve opening pressure are unstable.

[0028] The extending direction of the side surface 12 around the circumferential direction of the large surface 11 can be considered as a direction parallel to the circumferential direction of the large surface 11 .

[0029] Since the pressure relief portion 13 is relatively weak in strength, the bracket 20 is arranged to cover the pressure relief portion 13 to avoid abnormal valve opening caused by external force during normal use of the battery device.

[0030] In one embodiment, the battery 10 includes a middle portion 14 and two end portions 15, and along the length direction of the battery 10, the two end portions 15 are respectively connected to the opposite ends of the middle portion 14; wherein, along the width direction of the battery 10, the size of the end portion 15 is smaller than the size of the middle portion 14, thereby making reasonable use of the internal space of the battery, and furthermore, after the battery device is grouped, the end portion 15 and the bottom plate of the box body have a certain gap, for example, a pole assembly 30 is arranged on the end portion 15, and at this time, the space between the pole assembly 30 and the bottom plate of the box body can be increased, thereby improving the insulation gap between the pole assembly 30 and the bottom plate.

[0031] In one embodiment, the battery 10 includes a middle portion 14 and two end portions 15. Along the length direction of the battery 10, the two end portions 15 are respectively connected to the opposite ends of the middle portion 14; wherein, along the thickness direction of the battery 10, the size of the end portions 15 is smaller than the size of the middle portion 14, thereby reducing the overall volume of the battery 10 and facilitating the grouping of battery devices, thereby improving the space utilization when the batteries are grouped.

[0032] like Figure 7 As shown, along the thickness direction of the battery 10 , the size of the end side portion 15 is smaller than the size of the middle portion 14 , and along the width direction of the battery 10 , the size of the end side portion 15 is equal to the size of the middle portion 14 .

[0033] A pole assembly 30 may be provided on the end side portion 15. At this time, since the size of the end side portion 15 is smaller than the size of the middle portion 14 along the thickness direction of the battery 10, the pole assembly 30 may be accommodated in the space formed by two adjacent batteries 10, thereby improving the space utilization of the battery pack.

[0034] In one embodiment, Figure 5 and Figure 6 As shown, the battery 10 includes a middle portion 14 and two end side portions 15. Along the length direction of the battery 10, the two end side portions 15 are respectively connected to the opposite ends of the middle portion 14; wherein, along the thickness direction of the battery 10, the size of the end side portions 15 is smaller than the size of the middle portion 14, and along the width direction of the battery 10, the size of the end side portions 15 is smaller than the size of the middle portion 14.

[0035] A pole assembly 30 may be provided on the end side portion 15, and the pole assembly 30 may be accommodated in the space formed by two adjacent batteries 10, thereby improving the space utilization of the battery pack, and may also appropriately increase the distance between the end side portion 15 and the bottom plate of the box, thereby improving the safe use performance of the battery pack.

[0036] In one embodiment, Figure 5 As shown, the pressure relief portion 13 is disposed at the end side portion 15 , and after the battery device is grouped and the pressure relief portion 13 explodes, the gas can be sprayed to the periphery of the battery 10 as much as possible, thereby reducing the impact on other batteries 10 .

[0037] In one embodiment, Figure 6 As shown, a transition portion 16 is formed between the end portion 15 and the middle portion 14 , and the pressure relief portion 13 is arranged in the transition portion 16 , which not only ensures that the gas can be quickly discharged after the pressure relief portion 13 explodes, but also facilitates the molding of the pressure relief portion 13 .

[0038] It should be noted that the battery 10 may include a battery shell, and the pressure relief portion 13 is arranged on the battery shell. The pressure relief portion 13 can be integrally formed on the battery shell. The pressure relief portion 13 is arranged on the end side portion 15, or the pressure relief portion 13 is arranged in the transition portion 16. The pressure relief portion 13 can be formed by locally thinning the battery shell when the battery shell is molded.

[0039] Of course, it is not excluded that the pressure relief portion 13 may be a separate structure from the battery housing, and the pressure relief portion 13 may be an explosion-proof valve in the related art, and the explosion-proof valve may be welded to the battery housing.

[0040] In one embodiment, Figure 3As shown, the bracket 20 includes a fixed section 27 and a movable section 28. The fixed section 27 is arranged at the end side part 15, and the movable section 28 is arranged at the middle part 14. The movable section 28 is rotatably arranged relative to the fixed section 27, so that when the pressure relief part 13 explodes, the movable section 28 rotates relative to the fixed section 27 in a direction away from the battery 10, thereby realizing rapid discharge of gas and avoiding safety problems.

[0041] The bracket 20 includes a fixed section 27 and a movable section 28. The movable section 28 is rotatably arranged relative to the fixed section 27. When the battery 10 generates heat by itself, the side surface 12 expands and deforms. At this time, the movable section 28 can change its position, further releasing the freedom of the battery 10, so that the battery 10 is not constrained to deform to ensure that the pressure relief part 13 forms a stress concentration point at the valve opening position, ensuring that the pressure relief part 13 is positioned, oriented, and opens the valve at a constant pressure, thereby improving the safe use performance of the battery.

[0042] The battery includes a battery housing having two opposite large surfaces 11 and a side surface 12 arranged around the large surfaces 11. When the battery 10 generates heat by itself, the battery housing is deformed.

[0043] In one embodiment, Figure 3 As shown, the bracket 20 also includes a deformation guide portion 29, which is connected between the fixed segment 27 and the movable segment 28, so that the movable segment 28 is rotatably arranged relative to the fixed segment 27 through the deformation guide portion 29, that is, the deformation guide portion 29 can be deformed, thereby ensuring that the movable segment 28 can be deformed relative to the fixed segment 27 through the deformation guide portion 29, and also ensuring that the movable segment 28 can have a relatively fixed deformation rotation point.

[0044] Among them, at least one notch 291 is provided between the fixed section 27 and the movable section 28 to form a deformation guide portion 29. The existence of the notch 291 can weaken the local structure of the bracket 20, thereby facilitating deformation, thereby forming a deformation guide portion 29, thereby ensuring that the movable section 28 can rotate relative to the fixed section 27.

[0045] In one embodiment, the wall surface of the notch 291 includes an arc-shaped surface, which not only facilitates the forming of the notch 291 but also avoids stress concentration, thereby ensuring that the deformation guide portion 29 has a certain structural strength.

[0046] There may be a plurality of notches 291 , and notches 291 may be formed on opposite sides of the bracket 20 , thereby facilitating the formation of the deformation guide portion 29 .

[0047] In one embodiment, the bracket 20 includes a first part 21 and a second part 22, and the first part 21 and the second part 22 are arranged at intervals. Along the length direction of the battery 10, the first part 21 and the second part 22 are respectively arranged at the opposite ends of the battery 10, so that the first part 21 and the second part 22 can conveniently form protective supports for the opposite ends of the battery 10, and when the battery device is grouped, the first part 21 and the second part 22 can also stably support the battery 10 to ensure the installation stability of the battery 10.

[0048] The battery 10 includes a middle portion 14 and two end portions 15 , and the first portion 21 and the second portion 22 can be conveniently disposed on the two end portions 15 .

[0049] In one embodiment, Figure 1 As shown, the first part 21 and the second part 22 are independently arranged and not connected, that is, the middle part 14 of the battery 10 may not be covered, which can not only ensure the normal expansion of the battery 10 and the normal explosion of the pressure relief part 13, but also reduce the overall weight of the battery device, which is beneficial to improve the overall energy density of the battery device.

[0050] In one embodiment, Figure 2 As shown, the bracket 20 also includes a third part 23, which connects the first part 21 and the second part 22 at opposite ends on the same side of the battery 10, that is, the first part 21 and the second part 22 can be connected through the third part 23, thereby ensuring that the bracket 20 can be stably installed on the battery 10 and ensuring that the bracket 20 forms a reliable protection for the battery 10.

[0051] The third portion 23 forms a connection with the first portion 21 and the second portion 22, but the bracket 20 is still a non-circumferential closed structure, so the expansion deformation of the battery 10 can still be released. The third portion 23 connects the first portion 21 and the second portion 22 at opposite ends on the same side of the battery 10, that is, the third portion 23 is located on one side of the battery 10, and the third portion 23 extends along the length direction of the battery 10.

[0052] In one embodiment, the bracket 20 includes a first part 21, a second part 22 and a third part 23. The bracket 20 is an integrally formed structure, that is, the first part 21, the second part 22 and the third part 23 are integrally formed, which can not only improve the molding efficiency of the bracket 20, but also ensure the structural strength of the bracket 20, thereby reliably improving the safe use performance of the battery device.

[0053] The bracket 20 may be a plastic part, and the bracket 20 may be integrally injection molded.

[0054] In one embodiment, the first part 21, the second part 22 and the third part 23 may be a split-molded structure, and the first part 21, the second part 22 and the third part 23 may be connected after being formed separately.

[0055] In one embodiment, Figure 3 and Figure 4 As shown, a weak portion 24 is provided on the bracket 20, and the positive projection of the weak portion 24 on the side surface 12 at least partially covers the pressure relief portion 13, that is, the weak portion 24 is arranged opposite to the pressure relief portion 13. On the basis of ensuring that the bracket 20 can form a pressure relief portion 13, it can also avoid that the bracket 20 affects the normal explosion of the pressure relief portion 13. The setting of the weak portion 24 on the bracket 20 can effectively avoid the problem that the pressure relief portion 13 cannot be normally exploded due to the pressure relief portion 13 being pressed.

[0056] In one embodiment, Figure 3 As shown, a recess 25 is provided on the bracket 20 , and the bottom wall of the recess 25 forms at least a part of the weak portion 24 , which can facilitate the molding of the weak portion 24 , thereby improving the molding efficiency of the bracket 20 .

[0057] Among them, the recess 25 is arranged on the side of the bracket 20 away from the battery 10, so as to ensure that the surface of the bracket 20 in contact with the side surface 12 is a relatively flat surface, avoiding stress concentration when the battery 10 is squeezed by external force, thereby ensuring the safety performance of the battery 10.

[0058] In one embodiment, the recess 25 is a cross-type structure, or the recess 25 is a circumferentially closed structure, thereby increasing the size of the recess 25 and reliably reducing the impact of the explosion of the pressure relief portion 13, thereby improving the safe use performance of the battery device.

[0059] The depression 25 may be in the shape of a cross, a M, an O, an ellipse or a polygon, etc. Further, the polygon may be in the shape of a triangle, a quadrilateral, etc., which is not limited here.

[0060] In one embodiment, Figure 3 As shown, a support flange 26 is formed on the side of the bracket 20 facing away from the battery 10, and at least a portion of the support flange 26 extends from the bracket 20 along the width direction of the battery 10, so that after the battery device is grouped, the support flange 26 can increase the distance between the battery 10 and the bottom plate of the box, thereby ensuring a safe use spacing of the battery 10.

[0061] In one embodiment, a weak portion 24 is provided on the bracket 20, and the positive projection of the weak portion 24 on the side surface 12 at least partially covers the pressure relief portion 13, that is, the weak portion 24 is arranged opposite to the pressure relief portion 13, and the positive projection of the support flange 26 toward the side surface 12 covers the pressure relief portion 13, which not only allows the support flange 26 to support the battery 10, but also allows a certain buffer distance between the pressure relief portion 13 and the bottom plate of the box body, thereby not affecting the normal explosion of the pressure relief portion 13.

[0062] In one embodiment, Figure 3 As shown, along the thickness direction of the battery 10, support flanges 26 are provided at opposite ends of the bracket 20, thereby enabling the relative support flanges 26 to form reliable contact with the box body, ensuring stable support for the battery 10 and reducing the risk of shaking of the battery 10.

[0063] Along the thickness direction of the battery 10 , support flanges 26 are provided at opposite ends of the bracket 20 , that is, support flanges 26 can be extended from opposite ends of the same side of the bracket 20 away from the battery 10 , thereby ensuring that the bracket 20 is in reliable contact with the box body through the support flanges 26 .

[0064] In one embodiment, Figures 4 to 7 As shown, the battery device also includes a pole assembly 30, which is arranged on the large surface 11, thereby ensuring that the large surface 11 provides a reliable supporting surface for the pole assembly 30, and also facilitates the busbar to connect the pole assembly 30 when the battery device is grouped.

[0065] In one embodiment, the length of the battery is ≥ 400 mm, thereby increasing the capacity of the battery 10 and facilitating the grouping of the battery devices, thereby improving the grouping efficiency of the battery devices.

[0066] It should be noted that a battery includes a cell and an electrolyte, which is the smallest unit capable of performing electrochemical reactions such as charge / discharge. A cell refers to a unit formed by winding or laminating a stacked portion, the stacked portion including a first pole sheet, a separator, and a second pole sheet. When the first pole sheet is a positive pole sheet, the second pole sheet is a negative pole sheet. The polarities of the first pole sheet and the second pole sheet can be interchanged.

[0067] The battery is a laminated battery, which is not only convenient to group, but also can be processed to obtain a longer battery. Specifically, the battery cell is a laminated battery cell, which has a first pole piece stacked on top of each other, a second pole piece with electrical properties opposite to the first pole piece, and a diaphragm sheet arranged between the first pole piece and the second pole piece, so that multiple pairs of first pole pieces and second pole pieces are stacked to form a laminated battery cell.

[0068] Optionally, the battery may be a wound battery, that is, a first pole sheet, a second pole sheet having electrical properties opposite to the first pole sheet, and a diaphragm sheet disposed between the first pole sheet and the second pole sheet are wound to obtain a wound battery cell.

[0069] The battery can be a square battery, that is, the battery can be a quadrangular prism battery. The quadrangular prism battery mainly refers to a battery with a prism shape, but it is not strictly limited whether each side of the prism must be a straight line in the strict sense, and the corners between the sides are not necessarily right angles, and can be arc transitions.

[0070] It should be noted that the battery can be a square battery, and the battery 10 can include a length direction, a width direction and a thickness direction. The length direction of the battery 10 is the longest direction of the battery 10, and the thickness direction of the battery 10 is perpendicular to the two relatively large surfaces 11 of the battery 10, and the width direction of the battery 10 is perpendicular to both the length direction of the battery 10 and the thickness direction of the battery 10.

[0071] An embodiment of the present invention further provides a battery pack, which includes the above-mentioned battery device.

[0072] The battery device of a battery pack of an embodiment of the utility model comprises a battery 10 and a bracket 20, wherein the bracket 20 is arranged on the battery 10, thereby forming a support and protection for the battery 10. The battery 10 comprises two opposite large surfaces 11 and a side surface 12 arranged around the large surface 11, and a pressure relief portion 13 is arranged on the side surface 12, so that after the internal pressure of the battery 10 reaches a certain height, the pressure relief portion 13 can explode, thereby forming a safety protection for the battery 10. The bracket 20 is arranged to cover the pressure relief portion 13, thereby also allowing the bracket 20 to form a protection for the pressure relief portion 13, thereby preventing the pressure relief portion 13 from being damaged by collision. In the extension direction of the side surface 12 surrounding the large surface 11, the bracket 20 is a discontinuous structure to cover a portion of the side surface 12, so that when the battery 10 swells, the bracket 20 will not be constrained too tightly, and it can still ensure that the portion of the battery 10 provided with the pressure relief portion 13 undergoes a certain deformation, thereby releasing the freedom of the battery 10, so that the stress is concentrated on the pressure relief portion 13 of the side surface 12, and the valve opening pressure and valve opening position of the pressure relief portion 13 can be accurately controlled, thereby reliably improving the safe use performance of the battery device.

[0073] In one embodiment, the battery pack is a battery module or a battery pack.

[0074] The battery module includes a plurality of battery devices, and the battery module may further include an end plate and a side plate, and the end plate and the side plate are used to fix the plurality of battery devices.

[0075] It should be noted that multiple battery devices can be arranged in a box after forming a battery module, and multiple battery devices can be fixed by end plates and side plates. Multiple battery devices can be directly arranged in the box, that is, there is no need to group multiple battery devices. In this case, the end plates and side plates can be removed.

[0076] Those skilled in the art will readily come up with other embodiments of the present disclosure after considering the specification and practicing the utility model disclosed herein. The present disclosure is intended to cover any variation, use or adaptation of the present utility model, which follows the general principles of the present disclosure and includes common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and example embodiments are to be regarded as exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

[0077] It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from its scope. The scope of protection of the present disclosure is limited only by the appended claims.

Claims

1. A battery device, characterized in that: include: A battery (10), the battery (10) comprising two opposing large surfaces (11) and a side surface (12) arranged in a circumferential direction around the large surface (11), the side surface (12) being provided with a pressure relief portion (13); A bracket (20) is arranged on the battery (10) and covers the pressure relief portion (13). Along the circumferential direction of the large surface (11), the bracket (20) is a discontinuous structure so as to cover a portion of the side surface (12).

2. The battery device according to claim 1, characterized in that: The battery (10) comprises a middle portion (14) and two end portions (15), and along the length direction of the battery (10), the two end portions (15) are respectively connected to opposite ends of the middle portion (14); Wherein, along the width direction of the battery (10), the size of the end side portion (15) is smaller than the size of the middle portion (14), and / or, along the thickness direction of the battery (10), the size of the end side portion (15) is smaller than the size of the middle portion (14).

3. The battery device according to claim 2, characterized in that: The pressure relief portion (13) is arranged at the end side portion (15), or a transition portion (16) is formed between the end side portion (15) and the middle portion (14), and the pressure relief portion (13) is arranged at the transition portion (16).

4. The battery device according to claim 3, characterized in that: The bracket (20) comprises a fixed section (27) and a movable section (28); the fixed section (27) is arranged at the end side portion (15); the movable section (28) is arranged at the middle portion (14); the movable section (28) is rotatably arranged relative to the fixed section (27), so that when the pressure relief portion (13) explodes, the movable section (28) rotates relative to the fixed section (27) in a direction away from the battery (10).

5. The battery device according to claim 4, characterized in that: The bracket (20) further comprises a deformation guide portion (29), wherein the deformation guide portion (29) is connected between the fixed section (27) and the movable section (28), so that the movable section (28) is rotatably arranged relative to the fixed section (27) through the deformation guide portion (29); Wherein, at least one notch (291) is provided between the fixed section (27) and the movable section (28) to form the deformation guide portion (29).

6. The battery device according to claim 1, characterized in that: The bracket (20) comprises a first part (21) and a second part (22), wherein the first part (21) and the second part (22) are arranged at intervals, and along the length direction of the battery (10), the first part (21) and the second part (22) are respectively arranged at opposite ends of the battery (10).

7. The battery device according to claim 6, characterized in that: The bracket (20) further comprises a third part (23), wherein the third part (23) connects the first part (21) and the second part (22) at two opposite ends located on the same side of the battery (10).

8. The battery device according to claim 7, characterized in that: The bracket (20) is an integrally formed structure.

9. The battery device according to any one of claims 1 to 8, characterized in that: The bracket (20) is provided with a weak portion (24), and the orthographic projection of the weak portion (24) on the side surface (12) at least partially covers the pressure relief portion (13).

10. The battery device according to claim 9, characterized in that: The support (20) is provided with a recess (25), and the bottom wall of the recess (25) forms at least a part of the weak portion (24); Wherein, the recess (25) is arranged on a side of the bracket (20) facing away from the battery (10).

11. The battery device according to claim 10, characterized in that: The recess (25) is a cross-type structure, or the recess (25) is a circumferentially closed structure.

12. The battery device according to any one of claims 1 to 8, characterized in that: A support flange (26) is formed on one side of the bracket (20) facing away from the battery (10), and at least a portion of the support flange (26) extends from the bracket (20) along the width direction of the battery (10).

13. The battery device according to claim 12, characterized in that: The bracket (20) is provided with a weak portion (24), the positive projection of the weak portion (24) on the side surface (12) at least partially covering the pressure relief portion (13), and / or, along the thickness direction of the battery (10), the supporting flanges (26) are provided at both opposite ends of the bracket (20).

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