Battery pack box body and vehicle

Abstract

The utility model discloses a battery pack box body and a vehicle, the battery pack box body comprises a shell, an exhaust channel is arranged in the shell and is communicated with the outside, the shell defines at least two mounting grooves, the mounting grooves are used for accommodating battery modules, and first anti-explosion valves of the battery modules are arranged on one side facing the outside of the vehicle in the left-right direction; and the at least two buffer pieces are arranged on the sides, close to the outside of the vehicle, of the at least two mounting grooves in the left-right direction and clamped between the battery module and the side walls of the mounting grooves, the buffer pieces are obliquely arranged and connected with the shell, and through holes are formed in the buffer pieces and communicate with the exhaust channel. Wherein the body and the buffer piece can avoid huge impact force caused by side collision, the through hole in the buffer piece is communicated with the exhaust channel, and when the battery module is subjected to thermal runaway, a large amount of heat flows out, flows through the exhaust channel through the through hole and is finally discharged to the outside, so that nearby explosive disposal is realized, and the heat dissipation requirement of thermal runaway of the battery module is met.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, in particular to a battery pack box and a vehicle. Background Art

[0002] For pure electric vehicles, the extrusion of the battery cells / modules caused by the side column collision of the power battery pack has always been a pain point that troubles the power battery pack. In order to solve the problem of the extrusion of the battery cells / modules caused by the side column collision, higher requirements are put forward for the box design of the battery pack. In addition, safety is also of great importance when basic functions are met. Therefore, the requirements for the temperature control design of the battery pack are increased accordingly.

[0003] In the related technology, the frame of the box body only serves to bear the load, and the protection of the battery cell is mainly to reserve a certain gap between the battery cell and the frame in advance. However, when facing a stronger side impact, the risk of the battery cell being subjected to stress will increase exponentially. The battery cell will be squeezed by huge external forces and cannot meet its safety requirements. It is very likely to cause thermal runaway, threatening the personal safety of the car owner. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a battery pack box, in which a buffer can avoid the huge impact force caused by a side collision, and a through hole on the buffer is connected to an exhaust channel. When a battery module has thermal runaway, a large amount of heat flows out and flows through the exhaust channel through the through hole, and finally discharged to the outside, so as to achieve local explosion disposal and meet the heat dissipation requirements of the battery module in the event of thermal runaway.

[0005] The utility model also provides a vehicle.

[0006] According to the first aspect of the utility model, the battery pack case includes: an outer shell, an exhaust passage is arranged in the outer shell and the exhaust passage is connected to the outside, the outer shell defines at least two installation slots, the installation slots are used to accommodate battery modules, and the first explosion-proof valve of the battery module is arranged on the side facing the outside of the vehicle in the left-right direction; at least two buffer members, at least two of the buffer members are respectively arranged on the side of at least two of the installation slots adjacent to the outside of the vehicle in the left-right direction and are clamped between the battery module and the side walls of the installation slots, the buffer members extend in the front-rear direction, the buffer members are inclined and connected to the outer shell, the buffer members are provided with through holes and the through holes are connected to the exhaust passage.

[0007] According to the battery pack case of the embodiment of the utility model, the buffer component can avoid the huge impact force caused by the side collision, and the through hole on the buffer component is connected to the exhaust channel. When the battery module has thermal runaway, a large amount of heat flows out and flows through the exhaust channel through the through hole, and finally discharged to the outside, realizing the explosion disposal nearby and meeting the heat dissipation requirements of the battery module in the event of thermal runaway.

[0008] According to the battery pack case of the embodiment of the utility model,

[0009] According to some embodiments of the present invention, there are multiple through holes, and the multiple through holes are evenly spaced apart in the front-to-back direction.

[0010] According to some embodiments of the present invention, the housing includes: an upper shell and a lower shell, the upper shell is connected to the lower shell to form a closed cavity with the lower shell, and the exhaust channel and the mounting groove are provided on the lower shell.

[0011] According to some embodiments of the utility model, the lower shell includes: a bottom plate, two first side plates located in the left and right directions and two second side plates located in the front and rear directions, the peripheral side of the bottom plate is connected to the first side plate and the second side plate, and the buffer member is clamped between the battery module and the first side plate adjacent to the outside of the vehicle.

[0012] According to some embodiments of the utility model, the exhaust channel includes: a first sub-exhaust channel and a second sub-exhaust channel, a second explosion-proof valve is arranged on the second side panel, the first sub-exhaust channel is arranged in the first side panel, the second sub-exhaust channel is arranged in the second side panel, the first sub-exhaust channel and the second sub-exhaust channel are connected to each other, and the second sub-exhaust channel is connected to the second explosion-proof valve.

[0013] According to some embodiments of the utility model, the battery pack case also includes: a third side panel, the third side panel is arranged opposite to the first side panel, the third side panel is connected to the second side panel, and the third side panel, the second side panel and the first side panel form the installation groove, and the side of the battery module facing away from the outside of the vehicle is connected to the third side panel.

[0014] According to some embodiments of the utility model, the buffer component includes: a main body, a first flange and a second flange, the main body is provided with the through hole and the two sides of the main body are respectively connected to the first flange and the second flange, the first flange is bent relative to the main body and fixedly connected to the bottom plate, and the second flange is bent relative to the main body and fixedly connected to the first side plate.

[0015] According to some embodiments of the present invention, the upper shell is made of non-metallic material.

[0016] According to some embodiments of the present invention, the lower shell and the buffer component are an integrally formed structure.

[0017] The vehicle according to the second embodiment of the utility model includes: a battery pack, the battery pack includes: the battery pack case; a plurality of battery modules, the plurality of battery modules are arranged in the battery pack case.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 is a schematic structural diagram of a battery pack according to an embodiment of the utility model;

[0021] Figure 2 is a cross-sectional view of a battery pack according to an embodiment of the utility model;

[0022] Figure 3 yes Figure 2 A partial schematic diagram of

[0023] Figure 4 It is a schematic diagram of the installation of the battery module and the lower housing according to an embodiment of the utility model;

[0024] Figure 5 is a cross-sectional view of a battery module and a lower housing according to an embodiment of the utility model

[0025] Figure 6 It is a schematic structural diagram of a buffer according to an embodiment of the utility model.

[0026] Reference numerals:

[0027] 100. Battery pack;

[0028] 10. Battery pack box; 11. Shell; 12. Upper shell; 13. Lower shell; 131. Bottom plate; 132. First side plate; 133. Second side plate; 134. Mounting groove; 135. Second explosion-proof valve; 136. Third side plate; 137. First sub-exhaust channel; 138. Second sub-exhaust channel; 14. Buffer; 141. Main body; 142. First flange; 143. Second flange; 144. Through hole;

[0029] 20. Battery module. DETAILED DESCRIPTION

[0030] The embodiments of the present utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present utility model are described in detail below.

[0031] Reference below Figure 1-Figure 6 A battery pack case 10 according to an embodiment of the present utility model is described, and a vehicle including the battery pack case 10 is also proposed.

[0032] like Figure 1-Figure 5 As shown, the battery pack case 10 includes: a shell 11, an exhaust channel is provided in the shell 11 and the exhaust channel is connected to the outside. The shell 11 defines at least two mounting grooves 134, and the mounting grooves 134 are used to accommodate the battery module 20. Specifically, the shell 11 is recessed inward to form at least two mounting grooves 134, and a plurality of battery modules 20 are provided in the shell 11, and the plurality of battery modules 20 are respectively arranged in at least two mounting grooves 134. In the embodiment of the utility model, there are two mounting grooves 134, and there are two battery modules 20, and two battery modules 20 are respectively arranged in two mounting grooves 134.

[0033] In addition, the first explosion-proof valve of the battery module 20 is arranged on the side facing the outside of the vehicle in the left-right direction, that is, a plurality of first explosion-proof valves are arranged on the battery module 20, and the first explosion-proof valve is arranged on the side facing the outside of the vehicle in the left-right direction. When the battery module 20 has thermal runaway, a large amount of heat can flow out from the first explosion-proof valve and finally flow to the outside, thereby preventing the battery module 20 from exploding.

[0034] Combination Figure 6 As shown, the battery pack case 10 includes: a buffer 14, at least two buffers 14 are respectively arranged on the side of at least two mounting grooves 134 close to the outside of the vehicle in the left-right direction and are sandwiched between the battery module 20 and the side wall of the mounting groove 134, and the buffer 14 is arranged obliquely and connected to the housing 11. Specifically, any mounting groove 134 is provided with a buffer 14, the buffer 14 is arranged on the side of the mounting groove 134 close to the outside of the vehicle in the left-right direction, there is a gap between the battery module 20 and the side wall of the mounting groove 134 facing the outside of the vehicle, the buffer 14 is arranged between the battery module 20 and the gap of the mounting groove 134, the buffer 14 extends in the front-to-back direction, and the size of the battery module 20 in the front-to-back direction is consistent with the size of the buffer 14. The buffer 14 is arranged at an angle, and the lower side of the buffer 14 is connected to the bottom of the mounting groove 134, and the upper side of the buffer 14 is connected to the side of the mounting groove 134, so that the buffer 14 abuts between the battery module 20 and the side wall of the mounting groove 134. When the battery pack body 10 is subjected to a strong impact from a side collision, the battery module 20 can avoid the huge impact force caused by the side collision through the buffer 14.

[0035] The buffer member 14 may be made of steel or aluminum.

[0036] Furthermore, the buffer 14 is provided with a through hole 144, which is connected to the exhaust channel. In other words, the buffer 14 is provided with a through hole 144, which is connected to the exhaust channel inside the housing 11, so that the battery module 20 can be deflated nearby. When the vehicle is hit from the side, the battery module 20 is squeezed by a huge external force, and thermal runaway may occur in the battery module 20. A large amount of heat flows out from the first explosion-proof valve and flows to the exhaust channel through the through hole 144, and finally is quickly discharged to the outside through the exhaust channel, so as to achieve local deflagration and meet the heat dissipation requirements of the battery module 20 in case of thermal runaway.

[0037] Thus, the buffer 14 can avoid the huge impact force caused by the side collision. The through hole 144 on the buffer 14 is connected to the exhaust channel. When the battery module 20 has thermal runaway, a large amount of heat flows out and flows through the exhaust channel through the through hole 144, and finally discharged to the outside, so as to achieve local explosion disposal and meet the heat dissipation requirements of the battery module 20 in case of thermal runaway. The heat diffusion of the battery module 20 and the collision protection of the battery module 20 are organically combined to ensure that there will be no fire or explosion even if thermal runaway occurs.

[0038] according to Figure 6 As shown, there may be a plurality of through holes 144, and the plurality of through holes 144 are evenly spaced along the front-to-back direction. Specifically, a plurality of through holes 144 are provided on the buffer 14, and the plurality of through holes 144 are evenly spaced along the front-to-back direction on the buffer 14, so that when thermal runaway occurs in the battery module 20, a large amount of heat can enter the exhaust channel from the plurality of through holes 144, thereby increasing the heat and gas discharge rate, thereby meeting the heat dissipation requirements of the battery module 20 when thermal runaway occurs.

[0039] The through hole 144 may be circular, rectangular or polygonal.

[0040] like Figure 2 As shown, the housing 11 includes: an upper housing 12 and a lower housing 13, the upper housing 12 is connected to the lower housing 13 to form a closed cavity with the lower housing 13, and the lower housing 13 is provided with an exhaust channel and a mounting groove 134. Specifically, the upper housing 12 is located above the lower housing 13, and the upper housing 12 and the lower housing 13 are connected to each other to form a closed cavity between the upper housing 12 and the lower housing 13, and the battery module 20 and the buffer 14 are installed in the closed cavity. There is a certain gap between the upper housing 12 and the upper surface of the battery module 20, so that when the vehicle suffers a side collision, the battery module 20 has a certain deformation space in the height direction, reducing the probability of thermal runaway of the battery module 20.

[0041] Combination Figure 1-Figure 5As shown, the lower housing 13 includes: a bottom plate 131, two first side plates 132 located in the left-right direction and two second side plates 133 located in the front-back direction, the peripheral side of the bottom plate 131 is connected to the first side plate 132 and the second side plate 133, and the buffer 14 is sandwiched between the battery module 20 and the first side plate 132 adjacent to the outside of the vehicle. Specifically, the two first side plates 132 are respectively located in the left-right direction, that is, the two first side plates 132 are arranged oppositely, the two second side plates 133 are respectively located in the front-back direction, that is, the two second side plates 133 are arranged oppositely, any first side plate 132 is connected to the two second side plates 133, the four sides of the bottom plate 131 are respectively connected to the two first side plates 132 and the two second side plates 133, and the buffer 14 is located in the gap between any battery module 20 and the first side plate 132, so that when the vehicle is hit from the side, the buffer 14 can buffer the huge impact force brought by the side collision and reduce the probability of thermal runaway of the battery module 20.

[0042] like Figure 4 As shown, the exhaust channel includes: a first sub-exhaust channel 137 and a second sub-exhaust channel 138, a second explosion-proof valve 135 is arranged on the second side plate 133, the first sub-exhaust channel 137 is arranged in the first side plate 132, and the second sub-exhaust channel 138 is arranged on the second side plate 133. The first sub-exhaust channel 137 and the second sub-exhaust channel 138 are connected to each other, and the second sub-exhaust channel 138 is connected to the second explosion-proof valve 135. Specifically, a first sub-exhaust channel 137 is provided in the first side panel 132, and the through hole 144 is connected to the first sub-exhaust channel 137. When thermal runaway occurs in the battery module 20, a large amount of heat enters the first sub-exhaust channel 137 from the through hole 144; a second sub-exhaust channel 138 is provided in the second side panel 133 at the rear of the vehicle, and the second sub-exhaust channel 138 is connected to the first sub-exhaust channel 137. A second explosion-proof valve 135 is connected to the second side panel 133, and the second sub-exhaust channel 138 is connected to the second explosion-proof valve 135. A large amount of heat enters the second sub-exhaust channel 138 from the first sub-exhaust channel 137, and is then discharged to the outside from the second explosion-proof valve 135.

[0043] Furthermore, the battery pack case 10 further includes: a third side plate 136, the third side plate 136 is arranged opposite to the first side plate 132, the third side plate 136 is connected to the second side plate 133, and the third side plate 136 forms a mounting groove 134 with the second side plate 133 and the first side plate 132, and the side of the battery module 20 facing away from the outside of the vehicle is connected to the third side plate 136. Specifically, the third side plate 136 is located between the two first side plates 132 and extends in the front-to-back direction, that is, the third side plate 136 is arranged opposite to the first side plate 132, the third side plate 136 is connected to the two second side plates 133 at two sides in the front-to-back direction, the third side plate 136 forms at least two mounting grooves 134 with the first side plate 132 and the second side plate 133, and the side of the battery module 20 facing away from the outside of the vehicle is connected to the third side plate 136, so as to fix the battery module 20.

[0044] like Figure 6 As shown, the buffer member 14 includes: a main body 141, a first flange 142 and a second flange 143, a through hole 144 is provided on the main body 141 and two sides of the main body 141 are respectively connected to the first flange 142 and the second flange 143, the first flange 142 is bent relative to the main body 141 and fixedly connected to the bottom plate 131, and the second flange 143 is bent relative to the main body 141 and fixedly connected to the first side plate 132. Specifically, the through hole 144 is arranged on the main body 141, and the main body 141 is arranged at an angle. The lower side of the main body 141 is connected to the first flange 142, and the first flange 142 is bent relative to the main body 141 to fit with the bottom plate 131. The first flange 142 is fixedly connected to the bottom plate 131, and welding can be adopted, which is simple to operate and has high connection strength, or riveting can be adopted; the upper side of the main body 141 is fixedly connected to the second flange 143, and the second flange 143 is bent relative to the main body 141 to fit with the first side plate 132. The second flange 143 is fixedly connected to the first side plate 132, and welding can be adopted, which is simple to operate and has high connection strength, or riveting can be adopted; thereby, the buffer 14 is fixedly connected to the lower shell 13 to ensure the connection strength between the buffer 14 and the lower shell 13.

[0045] In some embodiments, the upper shell 12 is made of non-metallic material. After the vehicle is hit laterally, the battery module 20 slides upward along the buffer 14, and the battery module 20 collides with the upper shell 12. When the upper shell 12 is made of non-metallic material, even when the battery module 20 is hit, the battery module 20 collides with the non-metallic upper shell 12, the non-metallic upper shell 12 can ensure that the battery module 20 will not leak, short-circuit, or catch fire. In addition, the non-metallic material of the upper shell 12 can ensure that the battery module 20 is not conductive to the outside.

[0046] In some embodiments, the height of the lower shell 13 can range from 20 mm to 40 mm, which can reduce the weight of the battery pack case 10 and reduce costs.

[0047] In some embodiments, the lower housing 13 and the buffer 14 are integrally formed, which ensures the position accuracy of the buffer 14, improves the connection strength between the buffer 14 and the lower housing 13, ensures the integrity of the lower housing 13 and the buffer 14, reduces the installation process, and facilitates the installation of the battery module 20.

[0048] The vehicle according to the second embodiment of the utility model comprises: a battery pack 100, the battery pack 100 comprises: a battery pack case 10; a plurality of battery modules 20, the plurality of battery modules 20 are arranged in the battery pack case 10. The buffer 14 can avoid the huge impact force caused by the side collision of the vehicle, and the through hole 144 on the buffer 14 is connected to the exhaust channel. When the battery pack 100 has thermal runaway, a large amount of heat flows out and enters the exhaust channel in the shell 11 through the through hole 144, and finally is discharged to the outside, so as to realize the explosion discharge nearby and meet the heat dissipation requirements of the battery module 20 in case of thermal runaway.

[0049] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0050] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0051] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery pack box, characterized in that: include: A housing (11), wherein an exhaust passage is arranged in the housing (11) and the exhaust passage is communicated with the outside, the housing (11) defines at least two installation slots (134), the installation slots (134) are used to accommodate a battery module (20), and a first explosion-proof valve of the battery module (20) is arranged on a side facing outside the vehicle in a left-right direction; At least two buffer members (14), at least two of the buffer members (14) are respectively arranged on one side of at least two of the mounting grooves (134) adjacent to the outside of the vehicle in the left-right direction and are clamped between the battery module (20) and the side wall of the mounting groove (134), the buffer member (14) extends in the front-back direction, the buffer member (14) is inclined and connected to the housing (11), and a through hole (144) is provided on the buffer member (14), and the through hole (144) is connected to the exhaust passage.

2. The battery pack case according to claim 1, characterized in that: There are a plurality of through holes (144), and the plurality of through holes (144) are evenly spaced apart in the front-to-back direction.

3. The battery pack case according to claim 1, characterized in that: The housing (11) comprises an upper shell (12) and a lower shell (13); the upper shell (12) is connected to the lower shell (13) to form a closed cavity with the lower shell (13); the lower shell (13) is provided with the exhaust passage and the mounting groove (134).

4. The battery pack case according to claim 3, characterized in that: The lower housing (13) comprises: a bottom plate (131), two first side plates (132) located in the left-right direction, and two second side plates (133) located in the front-back direction. The peripheral side of the bottom plate (131) is connected to the first side plate (132) and the second side plate (133). The buffer component (14) is sandwiched between the battery module (20) and the first side plate (132) on the side adjacent to the outside of the vehicle.

5. The battery pack case according to claim 4, characterized in that: The buffer component (14) comprises: a main body (141), a first flange (142) and a second flange (143); the main body (141) is provided with the through hole (144) and two sides of the main body (141) are respectively connected to the first flange (142) and the second flange (143); the first flange (142) is bent relative to the main body (141) and is fixedly connected to the bottom plate (131); the second flange (143) is bent relative to the main body (141) and is fixedly connected to the first side plate (132).

6. The battery pack case according to claim 4, characterized in that: The exhaust channel comprises: a first sub-exhaust channel (137) and a second sub-exhaust channel (138); a second explosion-proof valve (135) is arranged on the second side plate (133); the first sub-exhaust channel (137) is arranged in the first side plate (132); the second sub-exhaust channel (138) is arranged on the second side plate (133); the first sub-exhaust channel (137) and the second sub-exhaust channel (138) are connected to each other; and the second sub-exhaust channel (138) is connected to the second explosion-proof valve (135).

7. The battery pack case according to claim 4, characterized in that: Also includes: A third side plate (136), the third side plate (136) being arranged opposite to the first side plate (132), the third side plate (136) being connected to the second side plate (133), and the third side plate (136), the second side plate (133) and the first side plate (132) forming the mounting groove (134), and the side of the battery module (20) facing away from the outside of the vehicle being connected to the third side plate (136).

8. The battery pack case according to claim 3, characterized in that: The upper shell (12) is made of non-metallic material.

9. The battery pack case according to claim 3, characterized in that: The lower shell (13) and the buffer component (14) are an integrally formed structure.

10. A vehicle, characterized in that: include: A battery pack (100), the battery pack (100) comprising: The battery pack case (10) according to any one of claims 1 to 9; A plurality of battery modules (20), wherein the plurality of battery modules (20) are arranged in the battery pack box (10).

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