CN220873724U

CN220873724U - Battery pack box and battery pack

Info

Publication number: CN220873724U
Application number: CN202322490294.8U
Authority: CN
Inventors: 张永明; 沈全安
Original assignee: Xinwangda Power Technology Co ltd
Current assignee: Xinwangda Power Technology Co ltd
Priority date: 2023-09-13
Filing date: 2023-09-13
Publication date: 2024-04-30
Anticipated expiration: 2033-09-13

Abstract

The embodiment of the application discloses a battery pack box and a battery pack, wherein the battery pack box is provided with a first direction and a fourth direction which are intersected, and the battery pack box comprises: the side frame comprises a side beam and a side beam which are connected with each other, the side beam and the bottom plate are enclosed to form a containing cavity, and the side beam is arranged on one side of the side beam, which is away from the containing cavity; at least one buffer cavity is arranged in the side beam, and a first buffer rib and a second buffer rib which are sequentially arranged along a first direction are arranged in the at least one buffer cavity; the first buffer rib extends along a first direction, and the second buffer rib extends along a fourth direction; the battery pack case further includes: and the filling unit is filled in the buffer cavity. According to the application, the lightweight design of the battery pack box body is realized, so that the energy density of the battery pack is improved while the safety of the battery pack is ensured.

Description

Battery pack box and battery pack

Technical Field

The application relates to the technical field of battery packs, in particular to a battery pack box and a battery pack.

Background

With the rapid development of new energy industry, battery packs with high capacity, long cycle life and high safety performance have been widely used and developed. The battery pack case is one of the core parts of the battery pack, and maintaining the safety performance of the battery pack case is one of the effective ways of ensuring the high safety performance of the battery pack. Therefore, how to improve the safety of the battery pack case is a problem to be solved.

Disclosure of utility model

The embodiment of the application provides a battery pack box and a battery pack, which are used for improving the safety performance of the battery pack by using the safety performance of the battery pack box.

In order to solve the technical problems, the embodiment of the application discloses the following technical scheme:

In one aspect, a battery pack case having intersecting first and fourth directions is provided, the battery pack case comprising: the side frame is connected to the edge of the bottom plate, the side frame comprises a side beam and a side beam which are connected with each other, the side beam and the bottom plate are enclosed to form a containing cavity, and the side beam is arranged on one side of the side beam, which is away from the containing cavity;

At least one buffer cavity is arranged in the side beam, and a first buffer rib and a second buffer rib which are sequentially arranged along the first direction are arranged in at least one buffer cavity; the first buffer rib extends along the first direction, and the second buffer rib bottom plate extends along the fourth direction;

the battery pack case further includes: and the filling unit is filled in the buffer cavity.

In addition to, or alternatively to, one or more features disclosed above, the orthographic projection of the side rail at least partially coincides with the orthographic projection of the floor along the first direction on a plane perpendicular to the first direction.

In addition to or in lieu of one or more of the features disclosed above, the battery pack case also has a second direction intersecting the first direction and the fourth direction in pairs;

The second buffer rib is provided with a first end and a second end which are oppositely arranged in the fourth direction, and the first end and the first buffer rib are arranged in a staggered manner in the second direction; the orthographic projection of the second end at least partially coincides with the orthographic projection of the bottom plate along the first direction on a plane perpendicular to the first direction.

In addition to or in lieu of one or more of the features disclosed above, at least one of the cushioning cavities is provided with a support rib extending in a second direction, the support rib being at least partially connected between the first end and the first cushioning rib.

In addition to or in lieu of one or more of the features disclosed above, the side frame further includes a connecting rib by which the side rail and the side rail are connected.

In addition to or as an alternative to one or more of the features disclosed above, the connecting bead is arranged parallel to the first cushioning bead in the first direction.

In addition to or instead of one or more of the features disclosed above, the connecting ribs are provided with fixing holes;

The battery pack case further includes: the fixing element is arranged on the bottom plate, and the fixing element penetrates through the fixing hole to connect the bottom plate with the connecting rib.

In addition to or in lieu of one or more of the features disclosed above, the angle α between the second buffer bar and the first direction satisfies: alpha is more than or equal to 20 degrees and less than or equal to 40 degrees.

In addition to or in lieu of one or more of the features disclosed above, the first buffer bar has a thickness H ₁ mm, satisfying: h ₁ is more than or equal to 1 and less than or equal to 3; and/or the number of the groups of groups,

The thickness of second buffering muscle is H ₂ mm, satisfies: h ₂ is more than or equal to 1 and less than or equal to 3.

In addition to or in lieu of one or more of the features disclosed above, a filling cavity is formed around the second buffer rib, the support rib and the side rail, and the filling unit is filled in the filling cavity; and the filling unit is positioned between the second support rib and the side beam.

In addition to or in lieu of one or more of the features disclosed above, the battery pack case has a third direction intersecting the first direction, the second direction, and the fourth direction in pairs,

The filling unit includes: and the filling pieces are at least partially detachably connected in the third direction.

In addition to or as an alternative to one or more of the features disclosed above, the filling unit further comprises: the expansion pieces are respectively arranged on the outer surface of the corresponding filling piece.

In another aspect, there is further disclosed a battery pack comprising a battery pack case as described in any one of the above, in addition to or instead of one or more of the features disclosed above; and a battery pack housed in the battery pack case.

One of the above technical solutions has the following advantages or beneficial effects: according to the application, the filling unit and the buffer rib are embedded in the boundary beam of the battery pack box body, so that the shape and appearance of the battery pack box body are unchanged, and the anti-side collision capability of the battery pack box body is improved by utilizing the energy absorption and extrusion resistance characteristics of the filling unit and the buffer rib, so that the safety performance of the battery pack box body is improved, the damage generated when the battery pack collides is ensured, and the safety performance of the battery pack is improved; meanwhile, as the battery pack box body is embedded into the filling unit, the thickness of the rib beam in the battery pack box body is not required to be increased, the lightweight design of the battery pack box body and the cost reduction are realized, and the energy density of the battery pack is improved while the safety of the battery pack is ensured.

Drawings

The technical solution and other advantageous effects of the present application will be made apparent by the following detailed description of the specific embodiments of the present application with reference to the accompanying drawings.

Fig. 1 is a view showing a three-dimensional structure of a battery pack case according to an embodiment of the present application;

fig. 2 is an exploded structural view of a battery pack case provided according to an embodiment of the present application;

Fig. 3 is a partial cross-sectional view of a battery pack case provided according to an embodiment of the present application;

FIG. 4 is a cross-sectional view of a side frame provided in accordance with an embodiment of the present application;

FIG. 5 is an exploded view of a side frame and a filler unit provided in accordance with an embodiment of the present application;

fig. 6 is a three-dimensional structural view of a packing provided according to an embodiment of the present application.

Reference numerals illustrate:

100. A battery pack case;

110. a side frame; 111. a side beam; 112. edge beams; 1121. a first buffer rib; 1122. a second buffer rib; 11221. a first end; 11222. a second end; 1123. a support rib; 1124. filling the cavity; 113. a connecting rib; 1131. a fixing hole; 114. a receiving chamber;

120. A bottom plate;

130. A filling unit; 131. a filler; 1311. a connecting groove; 1312. a connection part; 132. an expansion member;

140. A fixing element.

Detailed Description

In order to make the objects, technical solutions and advantageous effects of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and detailed description. It should be understood that the detailed description is intended to illustrate the application, and not to limit the application.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "plurality" means two or more, unless specifically defined otherwise.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; the connection may be mechanical connection, direct connection or indirect connection through an intermediate medium, and may be internal connection of two elements or interaction relationship of two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is less level than the second feature.

The term "parallel" in the present application includes not only the case of absolute parallelism but also the case of general parallelism as conventionally recognized in engineering, for example, "parallel" refers to a state in which straight lines form an angle of-1 ° to 1 ° with straight lines, straight lines form a plane, or plane form a plane; meanwhile, "vertical" includes not only the case of absolute vertical but also the case of substantially vertical as conventionally recognized in engineering, for example, "vertical" refers to a state in which an angle formed by a straight line and a straight line, a straight line and a plane, or a plane and a plane is 89 ° to 91 °. The distances are equal or the angles are equal, not only the absolute equal condition is included, but also the general equal condition of the conventional cognition in engineering is included, and certain errors can exist, such as a state that the tolerance range is between-1% and 1%.

At present, the boundary beam of the existing battery pack box body is used for bearing a battery pack, meanwhile, the function of resisting side collision is also considered, the safety performance of the battery pack is guaranteed, the using material of the boundary beam is generally an aluminum profile, the mode of improving the side collision resistance of the boundary beam at present is to increase the thickness of boundary beam ribs so as to achieve the aim, but the thickness of the boundary beam ribs is increased to increase the weight of the battery pack, the energy density of the battery pack is reduced, and the cost is greatly increased. The disadvantages are greater than the advantages.

In order to solve the above problems, the present application provides a battery pack case 100, which does not need to increase the thickness of a rib inside the battery pack case, realizes a lightweight design of the battery pack case, improves the energy density of the battery pack while ensuring the safety of the battery pack, and reduces the cost.

In an embodiment of the present application, referring to fig. 1 to 6, the present application provides a battery pack case 100, where the battery pack case 100 has a first direction X, a second direction Z, a third direction Y, and a fourth direction P intersecting each other, and specifically, the battery pack case 100 includes: the side frame 110 is connected to the edge of the bottom plate 120, the side frame 110 comprises a side beam 111 and a side beam 112 which are connected with each other, the side beam 111 and the bottom plate 120 enclose to form a containing cavity 114, and the side beam 112 is arranged on one side of the side beam 111 away from the containing cavity 114.

In this embodiment, the first direction X, the second direction Z and the third direction Y are preferably perpendicular to each other, and may be the width, the height and the length directions of the battery pack case 100, respectively.

The bottom plate 120 and the side frame 110 may be made of a metal or other strong material, but are not limited thereto. Preferably, the bottom plate and the side frames 110 are all made of aluminum profiles.

Further, at least one buffer cavity is arranged in the side beam 112, and a first buffer rib 1121 and a second buffer rib 1122 which are sequentially arranged along the first direction X are arranged in the at least one buffer cavity; the first buffer rib 1121 extends in the first direction X, and the second buffer rib 1122 extends in the fourth direction P;

Still further, in order to improve the safety performance of the battery pack case, the battery pack case 100 further includes: and a filling unit 130, wherein the filling unit 130 is filled in the buffer cavity.

The filling unit 130 may be installed in the battery pack case 100 at the same time when the battery pack case 100 is manufactured and molded, or may be installed in the battery pack case 100 after the battery pack case 100 is manufactured and molded.

The filling unit 130 may be inserted into the buffer chamber of the battery pack case 100 by means of insertion.

It can be appreciated that, in the present application, the filling unit 130 is embedded in the side beam 112 of the battery pack case 100, so that the energy absorption and extrusion resistance characteristics of the filling unit 130 are utilized to improve the side collision resistance of the battery pack case 100 while ensuring the shape and appearance of the battery pack case 100 unchanged, thereby improving the safety performance of the battery pack case 100, ensuring the damage generated during the collision of the battery pack, and improving the safety performance of the battery pack; meanwhile, as the battery pack box body 100 is embedded into the filling unit 130, the thickness of the rib beam in the battery pack box body is not required to be increased, and the lightweight design of the battery pack box body is realized, so that the energy density of the battery pack is improved while the safety of the battery pack is ensured.

Further, in an embodiment, at least one buffer cavity is further provided with a supporting rib 1123 extending along the second direction Z, and a filling cavity 1124 is formed between the second buffer rib 1122, the supporting rib 1123 and the side beam 112 in a surrounding manner, and the filling unit 130 is filled in the filling cavity 1124; preferably, the filling unit 130 is located between the support rib 1123 and the side member 111. It will be appreciated that in the present embodiment, the second buffer rib 1122 is located at the end of the first buffer rib 1121 near the side beam 111, and the filling unit 130 is also located near the side beam 111, so that when the first buffer rib 1121 absorbs part of the external force when being impacted by the external force, the filling unit 130 and the second buffer rib 1122 further buffer the external force, and under the second buffer, the side beam near the accommodating cavity 114 can be better protected, and thus the battery pack in the accommodating cavity 114 can be better protected.

In an embodiment of the present application, referring to fig. 5 and 6, the filling unit 130 includes: and a plurality of filling members 131, at least part of the filling members 131 being detachably connected in the third direction Y.

The material of the filling member 131 may be a material with a certain strength and a small density, such as plastic or a hard foam material, but not limited thereto.

Specifically, referring to fig. 6, the filling member 131 has a connecting portion 1312 and a connecting groove 1311 that are disposed opposite to each other in the third direction Y, the connecting groove 1311 is adapted to the connecting portion 1312, and the adjacent two filling members 131 are detachably connected to each other by caulking between the connecting portion 1312 and the connecting groove 1311.

The shape of the connection portion 1312 and the connection groove 1311 may be any shape, for example: the shapes of the connection portion 1312 and the connection groove 1311 may be circular arc shapes, and the shapes of the connection portion 1312 and the connection groove 1311 may be polygonal shapes, etc., so long as the connection portion 1312 and the connection groove 1311 are not limited in the present application, and the riveting between the adjacent two filling members 131 may be realized.

It can be appreciated that the plurality of filling members 131 are integrally connected, so that the filling members 131 can be suitable for different battery pack boxes when the size of the filling members 131 is satisfied, meanwhile, the influence on transportation and assembly caused by the overlength of the filling members 131 is avoided, the cost of developing the mould of the filling members is reduced, and the production cost is further reduced.

It should be understood that the detachable connection between two adjacent filling members 131 in the present application is not limited to the riveting between the connecting portion 1312 and the connecting groove 1311, and other detachable connection methods, for example: screw connection, magnetic connection, etc., or by chemical agents such as glue, etc., the detachable connection between two adjacent filling members 131 can be realized as well, and therefore, should also be regarded as a specific embodiment of the present solution.

Further, referring again to fig. 5, the filling unit 130 further includes: the plurality of expansion members 132 are respectively disposed on the outer surface of a corresponding one of the filling members 131.

The material of the expansion member 132 may be a foam, but is not limited thereto.

The expansion member 132 may be disposed on the outer surface of the filling member 131 in a fastening manner, may be disposed on the outer surface of the filling member 131 in a screwing manner, and may be disposed on the outer surface of the filling member 131 in an adhesive manner, but is not limited thereto, and the present application is not limited thereto and may be specifically selected according to practical situations.

It can be understood that, in the present application, the expansion member 132 is disposed on the outer surface of the filling member 131, so that when the filling member 131 is embedded into the buffer cavity, the expansion member 132 foams and expands in the buffer cavity, thereby fixing the filling member 131 in the buffer cavity, preventing the filling member 131 from shaking randomly, and ensuring the energy absorption and extrusion resistance of the filling member 131.

In an embodiment of the present application, referring to fig. 3 and 4, the orthographic projection of the side beam 112 at least partially coincides with the orthographic projection of the bottom plate 120 along the first direction X on a plane perpendicular to the first direction X.

Specifically, on a plane perpendicular to the first direction X along the first direction X, the front projection of the edge beam 112 and the front projection of the bottom plate 120 may partially coincide, and the front projection of the edge beam 112 may also be located in the front projection of the bottom plate 120, which is not specifically limited in the present application.

Further, referring to fig. 3 and 4, the second buffer rib 1122 is provided with a first end 11221 and a second end 11222 that are oppositely arranged in the fourth direction P, and the first end 11221 and the first buffer rib 1121 are arranged in a staggered manner in the second direction Z; the orthographic projection of the second end 11222 at least partially coincides with the orthographic projection of the bottom plate 120 along the first direction X in a plane perpendicular to the first direction X.

Wherein the support rib 1123 is at least partially connected between the first end 11221 and the first buffer rib 1121.

Specifically, the front projection of the second end 11222 may partially coincide with the front projection of the bottom plate 120 along the first direction X in a plane perpendicular to the first direction X, and the front projection of the second end 11222 may also be located within the front projection of the bottom plate 120. The application is not particularly limited, and can be specifically set according to actual situations.

It can be appreciated that, in the present application, the front projection of the second end 11222 is defined to at least partially overlap with the front projection of the bottom plate 120, so that when the battery pack case is bumped laterally, the second buffer rib 1122 can transmit part of the side bump force to the bottom plate 120, so that the bottom plate can bear part of the side bump force, thereby better protecting the battery in the battery pack case and improving the safety performance of the battery pack case.

In an embodiment of the present application, referring to fig. 4, the second buffer ribs 1122 are obliquely arranged, specifically, an included angle between the second buffer ribs 1122 and the first direction X is α, which satisfies: alpha is more than or equal to 20 degrees and less than or equal to 40 degrees. That is, the angle α between the second buffer beads 1122 and the first direction X may be controlled to be within a range of 20 ° to 40 °. For example, the angle α between the second buffer bar 1122 and the first direction X may be in a range of one or any two of 20 °,24 °,28 °,32 °,36 °, and 40 °. It should be noted that the specific values of the included angle α are given only by way of example, as long as any value in the range of 20 ° to 40 ° is within the scope of the present application.

The included angle alpha between the second buffer ribs 1122 and the first direction X is controlled within the range of 20-40 degrees, so that the second buffer ribs 1122 can be further ensured to support and buffer, and meanwhile, part of side collision force can be transmitted to the bottom plate 120, so that the safety performance of the battery pack box body is further improved.

Further, the second buffer rib 1122 has a certain thickness, and the thickness dimension of the second buffer rib 1122 may be uniform or non-uniform. When it is a uniform thickness structure, the thickness dimension of the second beads 1122 is fixed, and if it is not a uniform thickness structure, the thickness dimension of the second beads 1122 is a range of values, not single point data.

Generally, the second buffer bar 1122 is uniform, even though there is less thickness variation based on the machining.

In one embodiment, the thickness of the second buffer bar 1122 is H ₂ mm, which satisfies the following requirements: h ₂ is more than or equal to 1 and less than or equal to 3. Specifically, for example, when the thickness dimension of the second buffer rib 1122 is fixed, the thickness H ₂ of the second buffer rib 1122 may be 1mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm, or 3mm. When the thickness of the second buffer rib 1122 is not uniform, the thickness difference is within any range of 1 to 2mm, 1.5 to 3mm, or 2.5 to 3.5mm, and is within the scope of the present application. It is worth noting that the specific values of the thickness H ₂ are given by way of example only, as long as any value of thickness in the range of 1-3 mm is within the scope of the present application.

In the application, the thickness H ₂ of the second buffer rib 1122 is controlled within the range of 1-3 mm, so that the second buffer rib 1122 has a certain thickness, has a good buffer function, and simultaneously effectively enables the overall weight of the battery pack box body 100 to be designed in a light-weight manner, thereby improving the energy density of the battery pack while ensuring the safety of the battery pack.

Further, the first buffer rib 1121 has a certain thickness, and the thickness dimension of the first buffer rib 1121 may be uniform or non-uniform. When it is a structure of a uniform thickness, the thickness dimension of the first buffer rib 1121 is fixed, and if it is not a structure of a uniform thickness, the thickness dimension of the first buffer rib 1121 is a range of values, not single point data.

Generally, the first breaker 1121 is uniform, even though non-uniform, based on the small thickness differences that exist in the process.

In one embodiment, the thickness of the first buffer rib 1121 is H ₁ mm, which satisfies the following requirements: h ₁ is less than or equal to 1 and less than or equal to 3, namely the thickness H ₁ of the first buffer rib 1121 can be controlled within the range of 20-40 degrees. Specifically, for example, when the thickness dimension of the first buffer rib 1121 is fixed, the thickness H ₁ of the first buffer rib 1121 may be 1mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm, or 3mm. When the thickness of the first buffer rib 1121 is not uniform, the thickness difference is within any range of 1 to 2mm, 1.5 to 3mm, or 2.5 to 3.5mm, which falls within the scope of the present application. It is worth noting that the specific values of the thickness H ₁ are given by way of example only, as long as any value of thickness in the range of 1-3 mm is within the scope of the present application.

According to the application, the thickness H ₁ of the first buffer rib 1121 is controlled within the range of 1-3 mm, so that the first buffer rib 1121 has a certain thickness, has a good buffer function, and simultaneously effectively enables the overall weight of the battery pack box body 100 to be designed in a light-weight manner, so that the energy density of the battery pack is improved while the safety of the battery pack is ensured.

In the embodiment of the present application, referring to fig. 3 and 4, the side frame 110 further includes a connection rib 113, and the side frame 111 and the side frame 112 are connected by the connection rib 113.

Further, the connecting rib 113 is arranged in parallel with the first buffer rib 1121 in the first direction X. Specifically, the connecting rib 113 and the first buffer rib 1121 may be located on the same plane arranged along the first direction X, and the connecting rib 113 and the first buffer rib 1121 may also be located on different planes arranged along the first direction X.

It can be appreciated that the connecting rib 113 is arranged to connect the side beam 111 and the side beam, and meanwhile, the connecting rib 113 and the first buffer rib 1121 are arranged in parallel in the first direction X, so that the positions of the connecting rib 113 and the first buffer rib 1121 correspond to each other, the area where the filling piece is located is free from support and easy to deform when the side beam 112 is stressed, the battery in the battery pack box body is not easy to damage, and the safety of the battery pack is improved.

In the embodiment of the present application, referring to fig. 3 and 4, the connecting rib 113 is provided with a fixing hole 1131; the battery pack case 100 further includes: the fixing element 140, the fixing element 140 is disposed on the base plate 120, and the fixing element 140 is disposed through the fixing hole 1131 to connect the base plate 120 with the connecting rib 113.

The fixing member 140 may be a fixing bolt, but is not limited thereto.

According to the application, the bottom plate 120 is mounted on the side frame through the screw connection cooperation of the fixing element 140 and the fixing hole 1131, so that when the side collision occurs on the battery pack box body, the bottom plate can bear partial side collision force, the battery in the battery pack box body is not easy to damage, and the safety of the battery pack is improved.

It should be understood that the connection between the base plate 120 and the connecting rib 113 in the present application is not limited to the threaded connection between the fixing element 140 and the fixing hole 1131, and other connection manners, such as a snap connection, welding, etc., or chemical agents such as glue, etc., can also be used to achieve the connection between the base plate 120 and the connecting rib 113, and therefore, should also be considered as a specific embodiment of the present application.

In summary, referring to fig. 3, when the side beam 112 of the battery pack case 100 receives the side impact force F, the first buffer rib 1121 receives the impact force F to primarily absorb and buffer the impact force F, and part of the impact force F is conducted to the buffer cavity through the first buffer rib 1121, so that the filling member 131 and the connecting rib 113 in the buffer cavity buffer part of the side impact force F, and both sides of the area where the filling member 131 is located are extruded and deformed, and the filling member 131 can be used as a main energy absorbing deformation component to remove a part of force through the forced deformation; meanwhile, in the deformation process of the area where the filler 131 is located, the second buffer rib 1122 is thicker, so that deformation is not easy to occur, and part of side impact force F ₁ is transmitted to the area of the bottom plate 120 through the second buffer rib 1122, so that the edge beam 112 collides with the bottom plate 120, in the whole energy absorption deformation process, deformation of the edge beam 112, which is close to the accommodating cavity side, is reduced as much as possible, damage to a battery in the battery pack box body is reduced, and the safety of the battery pack is improved.

In another aspect, the present application also provides a battery pack, specifically, the battery pack may include a battery pack case as defined in any one of the above; the battery pack is accommodated in the battery pack box body; and the cover plate is covered on the battery pack box body.

The battery pack is formed by a plurality of battery cells, and the battery cells can be secondary batteries or primary batteries, and can also be lithium sulfur batteries, sodium ion batteries or magnesium ion batteries, but are not limited to the above. The single battery can be cylindrical, flat, rectangular or other shapes.

On the other hand, the application also provides electric equipment, which comprises the battery pack, wherein the battery pack is used as a power supply of the electric equipment. The electric device may be, but is not limited to, a mobile device (e.g., a cellular phone, a notebook computer, etc.), an electric vehicle (e.g., a pure electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, an electric bicycle, an electric scooter, an electric golf cart, an electric truck, etc.), an electric train, a ship, a satellite, an energy storage system, etc.

The above steps are presented merely to aid in understanding the method, structure, and core concept of the application. It will be apparent to those skilled in the art that various changes and modifications can be made to the present application without departing from the principles of the application, and such changes and modifications are intended to be included within the scope of the appended claims.

Claims

1. A battery pack case having intersecting first and fourth directions, the battery pack case comprising: the side frame is connected to the edge of the bottom plate, the side frame comprises a side beam and a side beam which are connected with each other, the side beam and the bottom plate are enclosed to form a containing cavity, and the side beam is arranged on one side of the side beam, which is away from the containing cavity;

At least one buffer cavity is arranged in the side beam, and a first buffer rib and a second buffer rib which are sequentially arranged along the first direction are arranged in at least one buffer cavity; the first buffer rib extends along the first direction, and the second buffer rib extends along the fourth direction;

2. The battery pack case of claim 1, wherein an orthographic projection of the side rail at least partially coincides with an orthographic projection of the bottom plate in a plane perpendicular to the first direction along the first direction.

3. The battery pack case according to claim 1, wherein the battery pack case further has a second direction intersecting the first direction and the fourth direction two by two;

4. A battery pack case as claimed in claim 3, wherein at least one of the buffer chambers is further provided therein with a support rib extending in the second direction, the support rib being at least partially connected between the first end and the first buffer rib.

5. The battery pack case as claimed in claim 3, wherein the side frame further comprises a connection rib, and the side member is connected to the side member by the connection rib.

6. The battery pack case according to claim 5, wherein the connecting ribs are provided with fixing holes;

7. The battery pack case according to any one of claims 1 to 6, wherein an angle α between the second buffer rib and the first direction is: alpha is more than or equal to 20 degrees and less than or equal to 40 degrees.

8. The battery pack case according to any one of claims 1 to 6, wherein the thickness of the first buffer rib is H ₁ mm, satisfying: h ₁ is more than or equal to 1 and less than or equal to 3; and/or the number of the groups of groups,

9. The battery pack case according to claim 4, wherein a filling cavity is formed around the second buffer rib, the support rib and the side beam, and the filling unit is filled in the filling cavity; and the filling unit is positioned between the supporting rib and the side beam.

10. The battery pack case as claimed in claim 3, wherein the battery pack case further has a third direction intersecting the first direction, the second direction, and the fourth direction in pairs,

11. The battery pack case according to claim 10, wherein the filling unit further comprises: the expansion pieces are respectively arranged on the outer surface of the corresponding filling piece.

12. A battery pack comprising the battery pack case according to any one of claims 1 to 11; and

And the battery pack is accommodated in the battery pack box body.