Battery pack

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery pack which comprises a box body, an upper cover and a supporting device, the upper cover is connected to the box body, and the upper cover is used as a vehicle body bottom plate; a plurality of liquid cooling components which are distributed at intervals are arranged in the box body; the supporting device is arranged between the box body and the upper cover, and the supporting device is fixedly connected to the liquid cooling component. The supporting device is connected with the box body to form a whole, so that the overall rigidity of the battery pack is effectively improved, the treading-preventing and deformation-resisting capability of the upper cover is improved, the impact force of the deformation of the upper cover on the battery core piles in the battery pack is reduced, and meanwhile, the risk that the electrical connection between the battery core piles is broken or loosened is reduced; and the probability of occurrence of safety accidents such as thermal runaway and fire disasters is reduced.

Description

Technical Field

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

[0002] The CTB (Cell to Body) battery pack integrates the battery directly into the vehicle's floor. However, the top of the existing CTB battery pack directly bears the force of pedaling or other forces, which can easily cause the top structure of the battery pack to deform when stepped on. Therefore, the impact force of the deformation of the battery pack top acts directly on the battery cell stack inside the battery pack, causing the electrical connections between the battery cell stacks to break or loosen due to the impact force, and the battery cell stack to be damaged and cause thermal runaway. That is, the internal temperature of the battery rises sharply, which in turn causes fire or explosion, seriously affecting the electrical performance and safety of the battery pack. Utility Model Content

[0003] The main purpose of the present utility model is to provide a battery pack, aiming to solve the technical problem that the top of the existing CTB battery pack is deformed, making the battery cell stack in the battery pack susceptible to corresponding impact force.

[0004] In order to achieve the above-mentioned purpose of the utility model, the utility model provides a battery pack, including a box body, an upper cover and a supporting device;

[0005] The upper cover is connected to the box body, and the upper cover is used as a vehicle body bottom plate;

[0006] A plurality of liquid cooling components are arranged in the box at intervals;

[0007] The supporting device is arranged between the box body and the upper cover, and the supporting device is fixedly connected to the liquid cooling component.

[0008] Furthermore, the supporting device includes a pressure plate and a support frame corresponding to the pressure plate, the pressure plate is connected to the liquid cooling component, the support frame is arranged on the side of the pressure plate away from the liquid cooling component, and the support frame is connected to the liquid cooling component by passing through the pressure plate through a first bolt.

[0009] Furthermore, a plurality of pressure relief holes are provided on the pressing plate, and the pressure relief holes are arranged at intervals along the entire length direction of the pressing plate.

[0010] Furthermore, a weight-reducing component is provided on the pressure plate, and the weight-reducing component includes a plurality of weight-reducing grooves and a plurality of weight-reducing holes, and the weight-reducing grooves and the weight-reducing holes are respectively arranged corresponding to the pressure relief holes.

[0011] Furthermore, the support frame is provided with reinforcing ribs, and the reinforcing ribs include a plurality of first reinforcing ribs spaced apart on the support frame, and the first reinforcing ribs protrude in a direction away from the pressure plate.

[0012] Furthermore, the reinforcing ribs further include a plurality of second reinforcing ribs spaced apart on the first reinforcing ribs, and the second reinforcing ribs are recessed in a direction approaching the pressing plate.

[0013] Furthermore, the vertical height of the protrusion of the first reinforcing rib is greater than or equal to the vertical depth of the depression of the second reinforcing rib.

[0014] Furthermore, a crossbeam is provided in the box body, and the crossbeam forms a specified interval with one side frame of the box body. One end of the liquid cooling component is connected to the crossbeam, and the other end is fixedly connected to the other side frame of the box body.

[0015] Furthermore, at least one first positioning column passing through the pressure plate is provided on the crossbeam, and at least one second positioning column passing through the pressure plate is provided on the liquid cooling component, and the first positioning column and the second positioning column are diagonally arranged.

[0016] Furthermore, the battery pack also includes thermal insulation buffer foam, which is arranged between the upper cover and the support frame.

[0017] Furthermore, the thermal insulation buffer foam is provided with a plurality of first distribution ribs recessed toward the pressure plate, and the upper cover is provided with a plurality of second distribution ribs recessed toward the thermal insulation buffer foam, and the first distribution ribs are arranged corresponding to the second distribution ribs.

[0018] Furthermore, the battery pack also includes a fire blanket, which is arranged on a side of the upper cover away from the insulating buffer foam.

[0019] Beneficial effects:

[0020] A battery pack of the present invention comprises a case, an upper cover and a supporting device; the upper cover is connected to the case, and the upper cover is used as a vehicle body floor; a plurality of spaced-apart liquid-cooling components are arranged in the case; the supporting device is arranged between the case and the upper cover, and the supporting device is fixedly connected to the liquid-cooling components, so that the supporting device is connected to the case to form a whole, which effectively improves the overall rigidity of the battery pack, improves the anti-trampling and anti-deformation ability of the upper cover, reduces the impact force on the battery cell stack in the battery pack due to deformation of the upper cover, and at the same time reduces the risk of breakage or loosening of the electrical connection between the battery cell stacks, and reduces the probability of safety accidents such as thermal runaway and fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a battery pack according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the overall structure of the box and the supporting device according to one embodiment of the present invention;

[0023] Figure 3 For an embodiment of the present utility model Figure 2 A local schematic diagram of point A;

[0024] Figure 4 For an embodiment of the present utility model Figure 2 A partial schematic diagram of point B;

[0025] Figure 5 For an embodiment of the present utility model Figure 2 A partial schematic diagram of point C;

[0026] Figure 6 For an embodiment of the present utility model Figure 2 A partial schematic diagram of point D;

[0027] Figure 7 For an embodiment of the present utility model Figure 2 A partial schematic diagram of point E;

[0028] Figure 8 For an embodiment of the present utility model Figure 2 A partial schematic diagram of point F;

[0029] Figure 9 For an embodiment of the present utility model Figure 2 Local schematic diagram of point G.

[0030] in:

[0031] 1. Box body; 2. Upper cover; 3. Support device; 4. Liquid cooling component; 5. Insulation buffer foam; 6. First distribution rib; 7. Second distribution rib; 8. Fire blanket; 9. Second bolt;

[0032] 30. Pressing plate; 31. Support frame; 32. First bolt; 33. Pressure relief hole; 34. Weight reduction groove; 35. Weight reduction hole; 36. Reinforcement rib; 37. First positioning hole; 38. Second positioning hole; 39. Weight reduction component;

[0033] 360, first reinforcing rib; 361, second reinforcing rib;

[0034] 40. Crossbeam; 41. Liquid cooling plate; 42. First positioning column; 43. Second positioning column; 44. Liquid cooling exhaust integrated board.

[0035] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0036] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like, indicating directions or positional relationships, are based on the directions 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 device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0038] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections, direct connections, or indirect connections through an intermediate medium; they may refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0039] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0040] Reference Figure 1-Figure 2, this embodiment provides a battery pack, including a box body 1, an upper cover 2 and a supporting device 3;

[0041] The upper cover 2 is connected to the box body 1, and the upper cover 2 is used as a vehicle body bottom plate;

[0042] The box body 1 is provided with a plurality of liquid cooling components 4 distributed at intervals;

[0043] The supporting device 3 is disposed between the box body 1 and the upper cover 2 , and the supporting device 3 is fixedly connected to the liquid cooling component 4 .

[0044] In the above embodiment, the battery pack is used to be installed on the body structure of the vehicle, and includes a box body 1, an upper cover 2 and a support device 3. The upper cover 2 is fixedly connected to the box body 1, wherein the upper cover 2 is used as the bottom plate of the vehicle body, that is, the upper cover 2 is both the top cover of the box body 1 and a partial bottom plate of the vehicle body structure. By directly integrating the battery pack into the bottom plate of the vehicle, space in the height direction of the vehicle body is saved, the passenger compartment space is effectively improved, and the volume utilization rate of the battery pack is improved, and the energy density is improved. In addition, the box body 1 includes a bottom plate and a frame, and the frame is arranged at the edge of the bottom plate to enclose a accommodating chamber, and a plurality of liquid cooling components 4 are arranged in the accommodating chamber, and the plurality of liquid cooling components 4 are arranged at intervals in the accommodating chamber to form a cell compartment for placing a cell stack. The support device 3 is arranged at one end of the cell stack away from the bottom plate of the box body 1, so that the support device 3 is located between the box body 1 and the upper cover 2, and the support device 3 is attached to the large surface of the cell stack, and the support device 3 is fixedly connected to the liquid cooling component 4, which is fixed. The fixed connection method is preferably a bolt connection. When the battery stack is placed in the box 1, the support device 3 is placed on the battery stack and connected to the liquid cooling component 4, so that the support device 3 and the box 1 are connected to form a whole. Finally, the upper cover 2 is installed and closed on the box 1, and the liquid cooling component 4 and the battery stack are used to support the support device 3 respectively. In addition, the support of the upper cover 2 by the support device 3 effectively enhances the bearing capacity and rigidity of the entire battery pack, and improves the anti-trampling and anti-deformation ability of the upper cover 2. Even if the upper cover 2 is subjected to corresponding trampling or other forces, the support device 3 can effectively prevent the deformation of the upper cover 2 from directly acting on the battery stack, ensuring that the battery stack in the battery pack will not be affected by the deformation impact force through the obstruction of the support device 3, avoiding the risk of breakage or loosening of the electrical connection between the battery stacks, and effectively avoiding damage to the battery stack and thermal runaway, reducing the probability of safety accidents such as thermal runaway and fire.

[0045] Reference Figure 1-Figure 2In one embodiment, the supporting device 3 includes a pressure plate 30 and a support frame 31 corresponding to the pressure plate 30, the pressure plate 30 is connected to the liquid cooling component 4, the support frame 31 is arranged on the side of the pressure plate 30 away from the liquid cooling component 4, and the support frame 31 is connected to the liquid cooling component 4 by a first bolt 32 passing through the pressure plate 30.

[0046] In the above embodiment, the support device 3 includes a pressing plate 30 and a support frame 31, wherein the pressing plate 30 is arranged corresponding to the support frame 31, that is, the length and width of the pressing plate 30 and the support frame 31 are the same. When the pressing plate 30 is connected to the liquid cooling component 4, the support frame 31 is arranged on the side of the pressing plate 30 away from the liquid cooling component 4, that is, the support frame 31 is located between the pressing plate 30 and the upper cover 2, so that the support frame 31 provides additional support for the upper cover 2 to prevent the upper cover 2 from being deformed due to force, and is sequentially fixed by a plurality of first bolts 32. The support frame 31 and the pressure plate 30 are penetrated so that the support frame 31 is installed on the pressure plate 30 through the first bolt 32 and connected to the liquid cooling component 4. In addition, the material of the support frame 31 and the pressure plate 30 is preferably steel, and the thickness of the support frame 31 and the pressure plate 30 are preferably 1 mm respectively. When the upper cover 2 is deformed by impact, the combination of the support frame 31 and the pressure plate 30 can absorb and disperse the impact force, reduce the impact force directly transmitted to the battery stack, thereby protecting the battery stack from damage, and effectively improving the safety of the entire battery pack.

[0047] Reference Figure 2 、 Figure 4 In one embodiment, a plurality of pressure relief holes 33 are provided on the pressure plate 30 , and the pressure relief holes 33 are arranged at intervals along the entire length direction of the pressure plate 30 .

[0048] In the above embodiment, a plurality of pressure relief holes 33 are provided on the pressure plate 30, and when the pressure plate 30 is rectangular, the plurality of pressure relief holes 33 are provided in the middle position of the pressure plate 30, and at the same time, the plurality of pressure relief holes 33 are evenly spaced along the entire length direction of the pressure plate 30. The pressure relief holes 33 are preferably runway-shaped, and when the pressure plate 30 is installed on the liquid cooling component 4, the pressure relief holes 33 are located between adjacent liquid cooling components 4 for placing the liquid cooling pipe directly above, which helps to improve the heat exchange efficiency, because the hot air will naturally rise and can more directly contact the liquid cooling system through the middle pressure relief hole 33, thereby improving the heat dissipation effect. In addition, when the internal pressure of the battery pack increases, uniform pressure relief is achieved to avoid local excessive pressure causing structural damage. When the battery suffers abnormal conditions such as thermal runaway, the pressure relief hole 33 can serve as a safety valve to quickly release the internal pressure to reduce the risk of explosion or fire.

[0049] Furthermore, a weight reduction component 39 is provided on the pressure plate 30, and the weight reduction component 39 includes a plurality of weight reduction grooves 34 provided on the side of the pressure plate 30, wherein the plurality of weight reduction grooves 34 are in relative positions to the plurality of pressure relief holes 33, so that the weight reduction grooves 34 are evenly spaced along the entire length direction of the pressure plate 30, and the weight reduction grooves 34 are respectively provided on the long sides of the pressure plate 30 on both sides, and the weight reduction grooves 34 on both sides are symmetrically arranged with the pressure relief hole 33 in the middle position of the pressure plate 30 as the symmetry axis, so that the weight reduction grooves 34 are recessed to a specified depth in the direction close to the pressure relief hole 33, and the shape of the weight reduction grooves 34 is preferably trapezoidal. When the pressure plate 30 is connected to the liquid cooling component 4, the two sides of the pressure plate 30 are in contact with the liquid cooling components 4 on both sides in the box body 1, that is, the weight reduction grooves 34 correspond to the liquid cooling components 4 on both sides, and the vertical specified depth of the inward recess of the weight reduction grooves 34 is less than or equal to the thickness of the liquid cooling component 4. In addition, the weight reduction component 39 also includes a plurality of weight-reducing holes 35 provided on the pressure plate 30, wherein the plurality of weight-reducing holes 35 are arranged corresponding to the plurality of pressure relief holes 33, so that the plurality of weight-reducing holes 35 are evenly spaced along the length direction of the pressure plate 30, and the weight-reducing holes are preferably in a runway shape and symmetrically arranged on both sides of the pressure relief holes 33. At the same time, the weight-reducing holes 35 correspond to the liquid cooling component 4, and the width between the two long sides of the weight-reducing holes 35 is less than or equal to the thickness of the liquid cooling plate exhaust plate, thereby avoiding direct contact between the weight-reducing grooves 34 and the weight-reducing holes 35 and the battery cell stack, ensuring that the pressure plate 30 can still completely cover the battery cell stack while relieving pressure through the weight-reducing grooves 34, reducing the risk of battery cell short circuit or damage due to mechanical shock or pressure release. In addition, the weight-reducing grooves 34 and the weight-reducing holes 35 effectively reduce the weight of the entire pressure plate 30, which helps to reduce the weight of the entire battery pack, thereby improving the energy efficiency and cruising range of electric vehicles.

[0050] Reference Figure 2-Figure 3 In one embodiment, a reinforcing rib 36 is provided on the support frame 31 , and the reinforcing rib 36 includes a plurality of first reinforcing ribs 360 spaced apart on the support frame 31 , and the first reinforcing ribs 360 protrude in a direction away from the pressure plate 30 .

[0051] In the above embodiment, a reinforcing rib 36 is provided on the support frame 31, wherein the reinforcing rib 36 includes a plurality of first reinforcing ribs 360, and the plurality of first reinforcing ribs 360 are evenly spaced on the support frame 31, and the distribution is preferably arranged in an array manner, and the first reinforcing rib 360 is in an upward convex state in the direction away from the pressure plate 30. When the support frame 31 is rectangular, the first reinforcing rib 360 is also rectangular, and the long sides of the first reinforcing rib 360 are parallel to the short sides of the support frame 31; in addition, the reinforcing rib 36 also includes a plurality of second reinforcing ribs 361, wherein the plurality of second reinforcing ribs 361 are evenly spaced on the first reinforcing rib 360, and the second reinforcing rib 361 is in a downward concave state in the direction close to the pressure plate 30, and the second reinforcing rib 361 is preferably in a runway shape, so that the second reinforcing rib 361 The long sides on both sides remain parallel to the short sides on both sides of the first reinforcing rib 360. The coordinated use of the raised first reinforcing rib 360 and the recessed second reinforcing rib 361 helps to more effectively disperse the load on the support frame 31 and reduce stress concentration points. Moreover, through the composite reinforcement effect, the local and overall stiffness of the support frame 31 is enhanced, the ability of the support frame 31 to resist deformation is improved, and thus the overall stiffness and load-bearing capacity of the support frame 31 are improved. In addition, the vertical height of the raised first reinforcing rib 360 is greater than or equal to the vertical depth of the recessed second reinforcing rib 361, ensuring that when the support frame 31 is installed on the pressure plate 30, the support frame 31 is tightly fitted on the pressure plate 30, ensuring that the connection between the support frame 31 and the pressure plate 30 is more stable, reducing displacement caused by improper installation or during use, and improving the stiffness and stability of the entire support device 3.

[0052] Reference Figure 2 In one embodiment, a crossbeam 40 is further provided in the box body 1, and the crossbeam 40 forms a specified interval with one side frame of the box body 1. One end of the liquid cooling component 4 is connected to the crossbeam 40, and the other end is fixedly connected to the other side frame of the box body 1.

[0053] In the above embodiment, a crossbeam 40 fixedly connected to the bottom plate of the box body 1 is further provided in the box body 1, wherein there is at least one crossbeam 40, and the crossbeam 40 is placed in the box body 1 to form a specified interval with one side frame of the box body 1, so that the crossbeam 40 can also serve as a cross plate of the box body 1. There are multiple liquid-cooling components 4, and the multiple liquid-cooling components 4 are arranged in the box body 1, including but not limited to longitudinal arrangement or transverse arrangement, so that one end of the liquid-cooling component 4 is fixedly connected to the crossbeam 40, and the other end of the liquid-cooling component 4 is fixedly connected to the other side frame of the box body 1. In addition, the liquid-cooling component 4 is also divided into a liquid-cooling plate 41 and a liquid-cooling exhaust integrated plate 44, wherein the liquid-cooling plate is arranged between adjacent liquid-cooling exhaust integrated plates. The arrangement of the crossbeam 40 and the liquid-cooling component 4 maximizes the utilization of the internal space of the battery pack, improves space utilization, and helps to more evenly distribute the heat inside the battery pack. The crossbeam 40 and the liquid-cooling component 4 can also serve as reinforcing beams inside the box body 1, so that they are connected with the support device 3 to form an overall reinforcing structure, effectively improving the overall stiffness of the entire battery pack and reducing deformation under various load conditions.

[0054] Reference Figure 2 、 Figure 5-Figure 9 In one embodiment, at least one first positioning column 42 is provided on the crossbeam 40 and passes through the pressure plate 30, and at least one second positioning column 43 is provided on the liquid cooling component 4 and passes through the pressure plate 30, and the first positioning column 42 and the second positioning column 43 are diagonally arranged.

[0055] In the above embodiment, at least one first positioning column 42 is provided on the crossbeam 40, a first positioning hole 37 for the first positioning column 42 to pass through is provided on the pressure plate 30, at least one second positioning column 43 is provided on the end of the liquid cooling component 4 away from the crossbeam 40, and a second positioning hole 38 for the second positioning column 43 to pass through is provided on the pressure plate 30, so that when the pressure plate 30 is installed on the crossbeam 40 and the liquid cooling component 4, the first positioning column 42 and the second positioning column 43 respectively pass through the first positioning hole 37 and the second positioning hole 38, and the first positioning column 42 and the second positioning column 43 are arranged diagonally, so that the pressure plate 30 is positioned and installed on the crossbeam 4 0 is mounted on the liquid-cooling component 4, the first positioning post 42 and the second positioning post 43 arranged diagonally can accurately position the pressure plate 30 in two vertical directions, ensuring that it is correctly installed on the liquid-cooling component 4, effectively simplifying the assembly process; in addition, the first positioning hole 37 is preferably circular, and the second positioning hole 38 is preferably runway-shaped, so that when the second positioning post 43 passes through the second positioning hole 38, the runway-shaped second positioning hole 38 provides a certain degree of adjustment space for the second positioning post 43, and fine-tuning can be performed during installation to ensure optimal alignment, so that the pressure plate 30 can tolerate a certain angle of deviation when installed on the liquid-cooling component 4, thereby improving the fault tolerance of the installation.

[0056] Reference Figure 1In one embodiment, the battery pack further includes a heat-insulating buffer foam 5 , which is disposed between the upper cover 2 and the support frame 31 .

[0057] In the above embodiment, the battery pack also includes an insulating buffer foam 5, wherein the material of the insulating buffer foam 5 is preferably silicone foam, or it can be a combination of a buffer material (PU (Polyurethane foam) foam, CR (Chlorinated Rubberfoam) foam) plus an insulating material (aerogel, insulating sheet), and the insulating buffer foam 5 is arranged between the upper cover 2 and the support frame 31. Through the buffering and supporting effect of the insulating buffer foam 5, the impact of the passengers in the passenger compartment on the bottom battery cell stack when they are active is effectively alleviated. At the same time, the insulating buffer foam 5 also has good thermal insulation and heat shock resistance. By using the insulating buffer foam 5 as the first line of defense when the battery stack is thermally runaway, the temperature rise rate of the upper cover 2 on the top of the battery pack can be effectively prolonged, which helps to slow down the spread of thermal runaway, improve the safety of the battery pack, and block the heat generated by the battery cell stack from being transferred to the passenger compartment, thereby improving the riding comfort of the passengers.

[0058] Reference Figure 1 In one embodiment, the thermal insulation buffer foam 5 is provided with a plurality of first distribution ribs 6 that are recessed toward the pressure plate 30, and the upper cover 2 is provided with a plurality of second distribution ribs 7 that are recessed toward the thermal insulation buffer foam 5, and the first distribution ribs 6 and the second distribution ribs 7 are arranged correspondingly.

[0059] In the above embodiment, a plurality of first distribution ribs 6 are provided on the thermal insulation buffer foam 5, the first distribution ribs 6 are recessed in a direction close to the pressure plate 30, and the plurality of first distribution ribs 6 are evenly spaced on the thermal insulation buffer foam 5, and a plurality of second distribution ribs 7 are provided on the upper cover 2, the second distribution ribs 7 are recessed in a direction close to the thermal insulation buffer foam 5, and the plurality of second distribution ribs 7 are evenly spaced on the upper cover 2, and at the same time, the plurality of first distribution ribs 6 and the plurality of second distribution ribs 7 are in a corresponding state, so that the vertical depth of the recessed second distribution ribs 7 is the same as the vertical depth of the recessed first distribution ribs 6, ensuring that the thermal insulation buffer foam 5 is tightly fitted on the upper cover 2 through the first distribution ribs 6, and the mutual connection between the first distribution ribs 6 and the second distribution ribs 7 improves the stiffness of the entire thermal insulation buffer foam 5 and the upper cover 2, and at the same time makes the connection between the thermal insulation buffer foam 5 and the upper cover 2 more stable, reducing the displacement caused by vibration or impact.

[0060] Reference Figure 1 、 Figure 8 In one embodiment, the battery pack further includes a fire blanket 8 , which is disposed on a side of the upper cover 2 away from the thermal insulation buffer foam 5 .

[0061] In the above embodiment, the battery pack further includes a fire blanket 8, wherein the material of the fire blanket 8 includes but is not limited to heat-resistant glass fiber material, asbestos, high-silicon material, carbon fiber, ceramic fiber, and other heat-resistant and fire-resistant materials, and the fire blanket 8 is arranged at the end of the upper cover 2 away from the thermal insulation buffer foam 5. When the battery stack undergoes thermal runaway, the fire blanket 8 and the thermal insulation buffer foam 5 together form a double layer of protection for thermal insulation and thermal shock resistance. At the same time, the fire blanket 8 can directly and effectively isolate the heat exchange between the passenger compartment space and the battery stack. When the battery stack undergoes thermal runaway, the fire blanket 8 can effectively prevent the direct thermal shock of high-temperature gas on the passenger compartment, thereby protecting the safety of the interior of the passenger compartment. In addition, a second bolt 9 provided on the box body 1 penetrates the pressure plate 30, the support frame 31, the thermal insulation buffer foam 5, the upper cover 2, and the fire blanket 8 from bottom to top, thereby connecting the fire blanket 8 to the box body 1. The second bolt 9 penetrates multiple components, firmly fixing the fire blanket 8 on the upper cover 2 while enhancing the stability and reliability of the entire battery pack.

[0062] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A battery pack, characterized in that: It includes a box body, an upper cover and a supporting device; The upper cover is connected to the box body, and the upper cover is used as a vehicle body bottom plate; A plurality of liquid cooling components are arranged in the box at intervals; The supporting device is arranged between the box body and the upper cover, and the supporting device is fixedly connected to the liquid cooling component.

2. The battery pack according to claim 1, wherein: The supporting device includes a pressure plate and a support frame corresponding to the pressure plate, the pressure plate is connected to the liquid cooling component, the support frame is arranged on a side of the pressure plate away from the liquid cooling component, and the support frame is connected to the liquid cooling component by passing through the pressure plate through a first bolt.

3. The battery pack according to claim 2, wherein: A plurality of pressure relief holes are provided on the pressing plate, and the pressure relief holes are arranged at intervals along the entire length direction of the pressing plate.

4. The battery pack according to claim 3, wherein: The pressure plate is further provided with a weight-reducing component, which includes a plurality of weight-reducing grooves and a plurality of weight-reducing holes, and the weight-reducing grooves and the weight-reducing holes are respectively arranged corresponding to the pressure relief holes.

5. The battery pack according to claim 2, wherein: The support frame is provided with reinforcing ribs, and the reinforcing ribs include a plurality of first reinforcing ribs spaced apart on the support frame, and the first reinforcing ribs protrude in a direction away from the pressure plate.

6. The battery pack according to claim 5, characterized in that: The reinforcing ribs further include a plurality of second reinforcing ribs spaced apart and distributed on the first reinforcing ribs, and the second reinforcing ribs are recessed in a direction close to the pressing plate.

7. The battery pack according to claim 6, characterized in that: The vertical height of the protrusion of the first reinforcing rib is greater than or equal to the vertical depth of the depression of the second reinforcing rib.

8. The battery pack according to claim 2, wherein: A crossbeam is further provided in the box body, and the crossbeam forms a specified interval with one side frame of the box body. One end of the liquid cooling component is connected to the crossbeam, and the other end is fixedly connected to the other side frame of the box body.

9. The battery pack according to claim 8, characterized in that: At least one first positioning column passing through the pressure plate is provided on the crossbeam, and at least one second positioning column passing through the pressure plate is provided on the liquid cooling component, and the first positioning column and the second positioning column are diagonally arranged.

10. The battery pack according to claim 2, wherein: The battery pack further includes a heat-insulating buffer foam, which is arranged between the upper cover and the support frame.

11. The battery pack according to claim 10, wherein: The thermal insulation buffer foam is provided with a plurality of first distribution ribs that are recessed toward the pressure plate, and the upper cover is provided with a plurality of second distribution ribs that are recessed toward the thermal insulation buffer foam, and the first distribution ribs are arranged correspondingly to the second distribution ribs.

12. The battery pack according to claim 11, wherein: The battery pack further includes a fire blanket, which is arranged on a side of the upper cover away from the thermal insulation buffer foam.

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