Box body and battery pack

Abstract

The utility model discloses a box and a battery pack, the box comprises a bottom structure and boundary beam structures, the boundary beam structures are arranged at two opposite ends of the bottom structure along a first direction, each boundary beam structure comprises a first support beam, a second support beam and a first guide beam, and the first support beam is connected with the bottom structure and extends along a second direction; the second supporting beam is connected to the first supporting beam; one end of the first guide beam is connected with the second supporting beam, the other end of the first guide beam is connected with the first supporting beam or the bottom structure, and in the second direction, the second supporting beam points to the first supporting beam, and the first guide beam obliquely extends in the direction close to the bottom structure. Compared with the prior art, when the second supporting beam is subjected to lateral pressure, the pressure is transmitted to the first supporting beam from the first guiding beam and then guided to the bottom structure, the bottom structure is large in rigidity and area, impact force can be jointly resisted through the large area and rigidity of the bottom structure, and the possibility that the boundary beam structure deforms due to stress is effectively reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy battery technical field, especially a kind of box and battery pack. BACKGROUND

[0002] Battery pack is usually a closed whole structure, and the lower box is located at the bottom of the battery pack, corresponding to the upper box or the cover of the battery pack, to provide physical protection for the battery module and other internal components.

[0003] The current new energy vehicle safety is increasingly high demand, and the lower box plays a very key role when the battery module is laterally extruded. The current conventional design ensures the safety of the battery cell by strengthening the edge beam or increasing the gap between the edge beam and the battery cell. This will increase the required space or weight, which is not conducive to competition in the market. UTILITY MODEL CONTENT

[0004] In view of the deficiencies in the prior art, the utility model provides a box and a battery pack, which can transmit lateral extrusion force to the structural member and avoid extruding the internal battery module.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A box includes a bottom structure and an edge beam structure. The bottom structure defines a first direction and a second direction. The edge beam structure is arranged at opposite ends of the bottom structure along the first direction. The edge beam structure includes a first support beam, a second support beam and a first guide beam. The first support beam is connected to the bottom structure and extends along the second direction. The second support beam is connected to the first support beam and extends away from the bottom structure along the first direction. One end of the first guide beam is connected to the second support beam, and the other end is connected to the first support beam or the bottom structure. In the second direction, the first guide beam extends obliquely towards the bottom structure from the direction of the second support beam pointing to the first support beam.

[0007] As one of the embodiments, the first support beam includes an inner side beam and an outer side beam. The inner side beam and the outer side beam are arranged opposite to each other. The outer side beam is connected to the second support beam, and the inner side beam is located on the side of the outer side beam away from the second support beam. The first guide beam is connected to the outer side beam and the second support beam respectively.

[0008] As one of the embodiments, the edge beam structure comprises a second guide beam, the second guide beam is connected with the second support beam and the inner side beam respectively, and the second guide beam extends obliquely towards the bottom structure along the direction of the second support beam pointing to the first support beam.

[0009] As one of the embodiments, the second guide beam extends in a straight line, or the second guide beam extends in a zigzag line.

[0010] As one of the embodiments, the second guide beam comprises a first segment and a second segment connected with each other, the first segment is connected with the second support beam and the inner side beam respectively, the second segment is connected with the inner side beam and the bottom structure respectively, the angle between the first segment and the first direction is α, the angle between the second segment and the first direction is β, and α < β.

[0011] As one of the embodiments, the first support beam comprises a reinforcing beam, the reinforcing beam is connected between the outer side beam and the inner side beam, and the extending direction of the reinforcing beam is parallel to the first direction.

[0012] As one of the embodiments, the first support beam comprises a thickened portion, along the second direction, the thickened portion is connected to one side of the outer side beam close to the bottom structure, and along the first direction, the thickened portion extends towards the inner side beam.

[0013] As one of the embodiments, the first guide beam is connected with the thickened portion.

[0014] As one of the embodiments, the bottom structure defines a third direction, the third direction is perpendicular to the first direction and the second direction, along the first direction, the opposite sides of the bottom structure are connected with the edge beam structure, and / or, along the third direction, the opposite sides of the bottom structure are connected with the edge beam structure.

[0015] The utility model further provides a kind of battery pack, including the box of any one embodiment in the above and battery, the bottom structure and the edge beam structure are enclosed to form installation space, the installation space is used to place the battery, the edge beam structure is spaced apart from the battery.

[0016] The utility model discloses a beneficial effect lies in: the application provides a kind of box and battery pack, box includes bottom structure and edge beam structure, edge beam structure can be set in the opposite ends of bottom structure along first direction, edge beam structure includes first support beam, second support beam and first guide beam, first support beam is connected with bottom structure and extends along second direction;Second support beam is connected to first support beam, and second support beam extends in the direction away from bottom structure along first direction;First guide beam one end is connected with second support beam, and the other end is connected with first support beam or bottom structure, wherein, in second direction, from second support beam to first support beam, first guide beam extends obliquely in the direction close to bottom structure.The first support beam extends along the second direction compared with the prior art, is mainly used to be enclosed with bottom structure and form mounting space, the first support beam is arranged with interval to battery, and the second support beam is mainly used to bear outside impact and extrusion, one end of the first guide beam is connected with the second support beam, and the other end can be connected with the first support beam or the bottom structure, so that when the second support beam is subjected to lateral pressure, the pressure is transmitted from the first guide beam to the first support beam, the first guide beam transmits the pressure to the bottom of the first support beam or directly guides the bottom structure, the bottom of the first support beam is connected with the bottom structure, therefore, the pressure can be directly transmitted to the bottom structure, the bottom structure has large rigidity and area, and the large area and rigidity can be used to resist the impact force together, effectively reduce the possibility of stress deformation of edge beam structure, improve the structural stability of edge beam structure.The battery pack using the box can save the size of the box, and a large interval does not need to be arranged between the battery and the box, so as to reduce the space and weight required by the battery pack. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The utility model discloses a structure schematic diagram of a kind of battery pack of the utility model shows;

[0018] Figure 2 The utility model discloses a structure schematic diagram of a kind of battery pack of the utility model shows;

[0019] Figure 3 The utility model discloses a structure schematic diagram of a kind of battery pack of the utility model shows;

[0020] Figure 4 For Figure 3 The utility model discloses a structure schematic diagram of a kind of battery pack of the utility model shows;

[0021] Reference signs: 1, bottom structure;11, bottom plate;12, liquid cooling plate;13, bottom guard plate;X, first direction;Y, third direction;Z, second direction;

[0022] 2, edge beam structure;21, first support beam;22, second support beam;23, first guide beam;24, second guide beam;211, outside beam;212, inside beam;213, reinforcing beam;214, thickening portion;

[0023] 3, installation space; 4, battery. DETAILED DESCRIPTION

[0024] In the present application, the terms "provided with", "provided", and "connected" should be interpreted broadly. For example, it can be fixedly connected, detachably connected, or integrally configured; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal communication between two devices, elements, or components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] The terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "radial", "circumferential", and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0026] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0027] Also, in addition to indicating the orientation or positional relationship, the above-mentioned partial terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the present application can be understood according to the specific circumstances.

[0028] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and are not intended to limit the present application.

[0029] Reference is made to Figure 1 and Figure 2The embodiment of the application provides a battery 4 package, which comprises a box body and a battery 4, the box body is internally provided with a mounting space 3, the battery 4 is placed in the mounting space 3, the box body comprises a bottom structure 1 and a side beam structure 2, the bottom structure 1 and the side beam structure 2 are closed to form the mounting space 3, and the battery 4 is usually arranged in a spaced mode with the side beam structure 2, so that the side beam structure 2 is prevented from being pressed to the battery 4 when the side beam structure 2 is subjected to lateral pressure.

[0030] Referring to Figure 3 The bottom structure 1 defines a first direction X and a second direction Z; the side beam structure 2 can be arranged at opposite ends of the bottom structure 1 along the first direction X, the side beam structure 2 comprises a first support beam 21, a second support beam 22 and a first guide beam 23, the first support beam 21 is connected with the bottom structure 1 and extends along the second direction Z; the second support beam 22 is connected with the first support beam 21, and the second support beam 22 extends away from the bottom structure 1 along the first direction X; one end of the first guide beam 23 is connected with the second support beam 22, and the other end is connected with the first support beam 21 or the bottom structure 1, wherein, in the second direction Z, the first guide beam 23 extends obliquely towards the bottom structure 1 in a direction from the second support beam 22 to the first support beam 21.

[0031] The bottom structure 1 is usually of a rectangular or polygonal structure, for example, the bottom structure 1 is of a rectangular structure, the bottom structure 1 has a length direction, a width direction and a height direction, which are respectively set as the first direction, the second direction and the third direction, for the purpose of clear description, Figure 1 The X direction represents the first direction, the Y direction represents the third direction, and the Z direction represents the second direction.

[0032] The side beam structure 2 can be connected at opposite ends of the bottom structure 1 along the first direction X, at this time, the first direction X usually refers to the direction in which the box body is subjected to lateral pressure, the side beam structure 2 is arranged along the first direction X, so that the lateral pressure can be effectively borne and the internal battery 4 is protected; and the side beam structure 2 comprises the first support beam 21, the second support beam 22 and the first guide beam 23, the first support beam 21 extends along the second direction Z and is mainly used for closing the bottom structure 1 to form the mounting space 3, the first support beam 21 is arranged in a spaced mode with the battery 4, the second support beam 22 is connected at a side of the first support beam 21 away from the battery 4 and extends along the first direction X, and the second support beam 22 is mainly used for bearing external impact and extrusion, one end of the first guide beam 23 is connected with the second support beam 22, and the other end can be connected with the first support beam 21, and the first guide beam 23 gradually extends towards the bottom structure 1 in a direction from the second support beam 22 to the first support beam 21, that is, the first guide beam 23 extends from top to bottom in the direction from the second support beam 22 to the first support beam 21.

[0033] In this way, when the second support beam 22 is subjected to lateral pressure, the pressure is transmitted from the first guide beam 23 to the first support beam 21, and since the first guide beam 23 extends from top to bottom, the first guide beam 23 transmits the pressure to the bottom of the first support beam 21, which is connected to the bottom structure 1, so that the pressure can be directly transmitted to the bottom structure 1. The bottom structure 1 has large rigidity and area, and can utilize the large area and rigidity to collectively resist the impact force, effectively reducing the possibility of deformation of the side beam structure 2 under stress and improving the structural stability of the side beam structure 2. It should be understood that the first support beam 21 and the bottom structure 1 should be rigidly connected, which is conducive to the first support beam 21 stably transmitting external force to the bottom structure 1. Moreover, the first guide beam 23 can also be directly connected to the bottom structure 1, so that the first guide beam 23 can directly guide the lateral pressure to the bottom structure 1.

[0034] It should be noted that in the second direction Z, the side of the bottom structure 1 close to the battery 4 is the top, and the side away from the battery 4 is the bottom. The bottom structure 1 includes a bottom plate 11, a liquid cooling plate 12 and a bottom guard plate 13 arranged in sequence from top to bottom. The bottom plate 11 and the side beam structure 2 enclose the mounting space 3. The liquid cooling plate 12 is mainly used for heat dissipation of the internal battery 4, and the bottom guard plate 13 mainly plays a protective role at the bottom, and can prevent water and dust from entering the installation. The first support beam 21 and the bottom structure 1 should be rigidly connected.

[0035] In an embodiment, the first guide beam 23 can be connected to the part of the second support beam 22 away from the first support beam 21, which is conducive to transmitting more lateral pressure to the bottom structure 1 through the first guide beam 23.

[0036] Referring to Figure 4 The first support beam 21 includes an inner side beam 212 and an outer side beam 211. The inner side beam 212 and the outer side beam 211 are arranged in opposite spaced relation. The outer side beam 211 is connected to the second support beam 22. The inner side beam 212 is located on the side of the outer side beam 211 away from the second support beam 22. The first guide beam 23 is connected to the outer side beam 211 and the second support beam 22, respectively.

[0037] In practical applications, along the first direction X, the first support beam 21 comprises the inner side beam 212 and the outer side beam 211 arranged at intervals, the outer side beam 211 is used to be connected with the second support beam 22, the inner side beam 212 is enclosed with the bottom structure 1 to form the installation space 3, the battery 4 is arranged at intervals with the inner side beam 212, the first guide beam 23 is connected with the outer side beam 211, the outer side beam 211 is connected with the bottom structure 1, when the second support beam 22 is subjected to lateral pressure, the first guide beam 23 guides the pressure to the outer side beam 211, and then to the bottom structure 1, so that the pressure transmitted to the inner side beam 212 by the outer side beam 211 can be effectively reduced, and the deformation of the inner side beam 212 caused by stress can be avoided, so that the battery 4 is prevented from being extruded by the inner side beam 212.

[0038] It should be noted that the first support beam 21 can also adopt a multi-layer (more than two layers) structure, not limited to the double-layer structure of the outer side beam 211 and the inner side beam 212, but also can be a three-layer beam or a four-layer beam structure.

[0039] Again refer to Figure 4 The edge beam structure 2 further comprises a second guide beam 24, the second guide beam 24 is connected with the second support beam 22 and the inner side beam 212 respectively, and extends obliquely towards the bottom structure 1 along the direction in which the second support beam 22 points to the first support beam 21, and is connected with the bottom structure 1.

[0040] In practical applications, the first guide beam 23 mainly guides the lateral pressure on the second support beam 22 to the bottom structure 1, and the second guide beam 24 mainly guides the lateral pressure on the first support beam 21 to the bottom structure 1, when the second support beam 22 is subjected to lateral pressure, part of the pressure is transmitted to the bottom structure 1 through the first guide beam 23, and part of the pressure is transmitted to the first support beam 21, since the second guide beam 24 is connected with the second support beam 22 and the inner side beam 212 respectively, the lateral pressure transmitted to the first support beam 21 will be transmitted along the force transmission path of the second guide beam 24, since the second guide beam 24 also extends towards the bottom structure 1 and is connected with the bottom structure 1, the second guide beam 24 will also guide the lateral pressure to the bottom structure 1, so as to prevent the deformation of the inner side beam 212 caused by stress and prevent the battery 4 from being extruded. It can be understood that the inner side beam 212 and the bottom structure 1 can be rigidly connected.

[0041] Again refer to Figure 4 In an embodiment, the second guide beam 24 can extend in a straight line, the stress condition of the second guide beam 24 extending in a straight line is relatively simple, when the external force is borne, the distribution rule is relatively intuitive, which is beneficial to accurately determine the size and material strength of the second guide beam 24 and other parameters in the design stage, and the straight-line extension can provide a stable force transmission path.

[0042] Again refer to Figure 4In an embodiment, the second guide beam 24 can extend in a zigzag manner, which can adapt to the space layout and form an effective guide structure in a narrow layout space of the cabinet, thereby saving the cabinet volume.

[0043] Referring again to Figure 4 , the second guide beam 24 can include a first segment and a second segment connected to each other, the first segment is connected to the second support beam 22 and the inner side beam 212 respectively, and the second segment is connected to the inner side beam 212 and the bottom structure 1 respectively, the first segment is arranged at an angle α with respect to the first direction X, and the second segment is arranged at an angle β with respect to the first direction X, and α < β.

[0044] In an embodiment, the second guide beam 24 can include a first segment and a second segment at an angle, the first segment is arranged at an angle smaller than the second segment with respect to the first direction X, that is, the first segment is more gentle than the second segment, the first segment is connected to the second support beam 22, and the pressure on the second support beam 22 is directly transmitted to the first segment, so the impact force on the first segment is larger, and the lateral pressure on the second support beam 22 is usually a horizontal force in the first direction X, and the more gentle first segment can smoothly transmit the force, if the angle between the first segment and the direction of the force is too large, the force will generate a larger component perpendicular to the surface of the first segment, which is similar to the impact force and can cause local impact damage to the first segment.

[0045] The force on the second segment comes from the component transmitted by the first segment, and the impact force on this part is smaller, so the second segment can be steeper to directly transmit the force to the bottom structure 1 and save the side space of the cabinet.

[0046] Referring again to Figure 4 , the first support beam 21 includes a reinforcing beam 213, the reinforcing beam 213 is connected between the outer side beam 211 and the inner side beam 212, and the extending direction of the reinforcing beam 213 is parallel to the first direction X.

[0047] In actual application, the reinforcing beam 213 can improve the bending resistance of the first support beam 21, when the second support beam 22 is subjected to lateral pressure, the second support beam 22 transmits the pressure to the outer side beam 211, the outer side beam 211 generates a bending moment, thereby causing the outer side beam 211 to bend and deform, the reinforcing beam 213 makes the outer side beam 211 more effectively resist the bending moment and reduce the bending deformation. At the same time, the reinforcing beam 213 connects the outer side beam 211 and the inner side beam 212 together to enhance the integrity of the structure.

[0048] Referring again to Figure 4 , the first support beam 21 includes a thickened portion 214, along the second direction Z, the thickened portion 214 is connected to one side of the outer side beam 211 close to the bottom structure 1, and along the first direction X, the thickened portion 214 extends towards the inner side beam 212.

[0049] In practical application, the thickened portion 214 increases the structural strength of the outer side beam 211. When the first guide beam 23 is connected with the outer side beam 211, the first guide beam 23 transmits force to the end of the outer side beam 211 close to the bottom structure 1, so the thickened portion 214 can effectively improve the load capacity of the outer side beam 211 at this position, avoiding deformation of the outer side beam 211 under force.

[0050] Again referring to Figure 4 , the first guide beam 23 can be connected with the thickened portion 214. Since the part of the outer side beam 211 located at the thickened portion 214 has strong structural rigidity, connecting the first guide beam 23 with the thickened portion 214 can effectively offset the external pressure by the thickened portion 214, thereby improving the compression resistance of the side beam structure 2.

[0051] Again referring to ​ , along the first direction X, the opposite sides of the bottom structure 1 can be connected with the side beam structure 2, and along the third direction Y, the opposite sides of the bottom structure 1 can also be connected with the side beam structure 2. That is, the bottom structure 1 has opposite sides in multiple directions, and the opposite sides in any one direction can be connected with the side beam structure 2. If the box body is subjected to pressure from the first direction X, the side beam structure 2 is arranged on the opposite sides in the first direction X. If the box body is subjected to pressure from the third direction Y, the side beam structure 2 can be arranged on the opposite sides in the third direction Y. If there is pressure from both the first direction X and the third direction Y, the side beam structure 2 can be arranged on the opposite sides in both the first direction X and the third direction Y. The specific arrangement mode is determined according to the actual stress condition of the box body, and the present application does not limit the arrangement mode.

[0052] The above is only a specific embodiment of the present application. It should be noted that those skilled in the art can make some improvements and refinements without departing from the principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A case characterized by comprising: The application relates to a box body and a battery. The box body comprises: a bottom structure defining a first direction and a second direction; a side beam structure arranged at opposite ends of the bottom structure along the first direction, the side beam structure comprising a first support beam, a second support beam and a first guide beam, the first support beam being connected with the bottom structure and extending along the second direction, the second support beam being connected with the first support beam and extending away from the bottom structure along the first direction, the first guide beam being connected with the second support beam at one end and connected with the first support beam or the bottom structure at the other end, 2. The case of claim 1, wherein, wherein, in the second direction, the first guide beam extends obliquely towards the bottom structure from the second support beam to the first support beam.

3. The case of claim 2, wherein, The first support beam comprises an inner side beam and an outer side beam, the inner side beam and the outer side beam being arranged oppositely, the outer side beam being connected with the second support beam, the inner side beam being located on the side of the outer side beam away from the second support beam, and the first guide beam being connected with the outer side beam and the second support beam respectively.

4. The case of claim 3, wherein, The side beam structure comprises a second guide beam, the second guide beam being connected with the second support beam and the inner side beam respectively, and extending obliquely towards the bottom structure from the second support beam to the first support beam along the second direction.

5. The case of claim 3, wherein, The second guide beam extends in a straight line or in a broken line.

6. The case of claim 2, wherein, The second guide beam comprises a first segment and a second segment connected with each other, the first segment being connected with the second support beam and the inner side beam respectively, the second segment being connected with the inner side beam and the bottom structure respectively, an angle between the first segment and the first direction being alpha, and an angle between the second segment and the first direction being beta, alpha < beta.

7. The case of claim 2, wherein, The first support beam comprises a reinforcing beam, the reinforcing beam being connected between the outer side beam and the inner side beam, and extending in parallel with the first direction.

8. The case of claim 7, wherein, The first support beam comprises a thickened portion, the thickened portion being connected with the outer side beam on the side close to the bottom structure along the second direction, and extending towards the inner side beam along the first direction.

9. The case of claim 1, wherein, The first guide beam is connected with the thickened portion. The bottom structure defines a third direction perpendicular to the first direction and the second direction.

10. A battery pack, characterized by, The bottom structure is connected with the side beam structure on opposite sides along the first direction, and / or the bottom structure is connected with the side beam structure on opposite sides along the third direction. The box body and the battery are arranged in the mounting space enclosed by the bottom structure and the side beam structure, and the side beam structure is spaced apart from the battery.

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