Battery box and battery pack

Abstract

The utility model relates to the technical field of batteries, and provides a battery box and a battery pack. The battery box comprises a box body. A first installation area and a second installation area which are distributed in the first direction are arranged in the box body. Battery modules are arranged in the first mounting area and the second mounting area. Wherein in the second direction, the length of the first installation area is L1, the length of the second installation area is L2, and L1 is larger than L2. Wherein the first direction is the height direction of the box body, and an angle is formed between the first direction and the second direction. Therefore, based on the length arrangement of the first mounting area and the second mounting area, the space layout of the box body can be more reasonable to adapt to the mounting space of the SUV model, so that the mounting space of the SUV model is fully utilized, and the cruising ability of the vehicle is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, concretely relates to battery box and battery package. BACKGROUND

[0002] In the related art, compared with a car, a SUV (Sport Utility Vehicle, sport utility vehicle) model has more installation space in the Z direction (vehicle height direction) and can load a higher battery package. The current battery package is usually a single-layer structure and cannot fully utilize the installation space of the SUV model. SUMMARY

[0003] Embodiments of the utility model provide a battery box and a battery package. By forming a first installation area and a second installation area in the box body, multiple layers of battery modules can be stacked in the box body. Based on the length design of the first installation area and the second installation area, the battery box can fully utilize the installation space of the SUV model.

[0004] In a first aspect, embodiments of the utility model provide a battery box, comprising:

[0005] The box body has a first installation area and a second installation area distributed along a first direction inside. The first installation area and the second installation area are provided with battery modules. Along a second direction, the length of the first installation area is L1, and the length of the second installation area is L2, satisfying L1>L2. The first direction is the height direction of the box body, and the first direction is arranged at an angle to the second direction.

[0006] In an embodiment, along the second direction, the second installation area is arranged close to the end of the first installation area.

[0007] In an embodiment, the battery box further comprises:

[0008] The box cover is hinged to the box body.

[0009] The box cover comprises a first straight plate, an inclined plate, and a second straight plate connected in sequence. Along the second direction, the first straight plate and the second straight plate are arranged at intervals. The distance between the first straight plate and the bottom surface of the box body is D1, and the distance between the second straight plate and the bottom surface of the box body is D2, satisfying D1

[0010] In an embodiment, the inclination angle of the inclined plate is α, satisfying 30°≤α≤60°.

[0011] In an embodiment, the box body comprises:

[0012] two first side plates, each extending along the second direction, the two first side plates being spaced apart along a third direction, wherein the third direction is angled with respect to both the first direction and the second direction;

[0013] a second side plate connected between first ends of the two first side plates;

[0014] a third side plate connected between second ends of the two first side plates;

[0015] a bottom plate connected with the two first side plates, the second side plate, and the third side plate.

[0016] In an embodiment, the first side plate is connected with a first support configured to support the battery module, wherein the first support is disposed at a junction of the first mounting area and the second mounting area.

[0017] In an embodiment, the first support is connected with a partition plate located at the junction of the first mounting area and the second mounting area.

[0018] wherein the battery module placed on the first support is spaced apart from the partition plate, and a first pressure relief cavity is formed between the battery module and the partition plate.

[0019] In an embodiment, the first side plate is provided with a longitudinal beam, and the first support is connected to the longitudinal beam, wherein a second pressure relief cavity is formed in the first support, a third pressure relief cavity is formed in the longitudinal beam, and the first pressure relief cavity, the second pressure relief cavity, and the third pressure relief cavity are connected in series.

[0020] In an embodiment, the first support comprises:

[0021] a first support portion connected with the longitudinal beam;

[0022] a second support portion connected with the first support portion, and the second support portion and the first support portion form a stepped support gap configured to overlap the partition plate;

[0023] wherein the second pressure relief cavity is formed in the first support portion, the first support portion is configured with a first through port and a second through port connected with the second pressure relief cavity, the first through port is connected with the first pressure relief cavity, and the second through port is connected with the third pressure relief cavity.

[0024] In an embodiment, the first side plate is further connected with a second support configured to support the battery module, wherein the battery module placed on the second support is spaced apart from the bottom plate, and a fourth pressure relief cavity is formed between the battery module and the bottom plate.

[0025] In an embodiment, a fifth pressure relief cavity is configured in the second support, and the third pressure relief cavity, the fourth pressure relief cavity and the fifth pressure relief cavity are communicated.

[0026] In an embodiment, the cavity height of the first pressure relief cavity is H, and 5 mm≤H≤20 mm is satisfied.

[0027] In an embodiment, a cross beam is arranged between the two first side plates, and a reinforcing rib is arranged between the cross beam and the second side plate, or a reinforcing rib is arranged between the cross beam and the third side plate.

[0028] In an embodiment, the cross beam is provided as two, one of which is arranged close to the second side plate, and the reinforcing rib is arranged between the cross beam and the second side plate, and the other of which is arranged close to the third side plate, and the reinforcing rib is arranged between the cross beam and the third side plate.

[0029] In an embodiment, the reinforcing ribs are spaced apart as at least two along the third direction, and the distance between every adjacent two reinforcing ribs is D3, and 60 mm≤D3≤300 mm is satisfied.

[0030] In an embodiment, the length of the reinforcing rib along the second direction is L3, and the width of the reinforcing rib along the first direction is D4, and 60 mm≤L3≤150 mm and 50 mm≤D4≤100 mm are satisfied.

[0031] In a second aspect, embodiments of the utility model provide a battery pack, comprising:

[0032] A first battery module;

[0033] A second battery module;

[0034] The battery box as described above;

[0035] Wherein, the first battery module is arranged in the first mounting area, the second battery module is arranged in the second mounting area, and the first mounting area and the second mounting area are both filled with a foaming layer.

[0036] The embodiments of the utility model have the beneficial effects that:

[0037] In the embodiment of the utility model, through forming first installation area and second installation area in the box body, then can install battery module in first installation area and second installation area respectively, form the battery module structure of multilayer superposition. Based on the length setting of first installation area and second installation area, can make the box body space layout more reasonable, to adapt the installation space of SUV model, thereby make full use of the installation space of SUV model, improve the endurance ability of vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the following will briefly introduce the drawing needed to be used in the embodiment description, obviously, the drawing in the following description is only some embodiments of the utility model, for the person skilled in the art, under the premise of not creating laboriously, still can obtain other drawings according to these drawings.

[0039] Figure 1 It is the explosion drawing of battery pack provided by the embodiment of the utility model;

[0040] Figure 2 It is the structural schematic diagram of battery box provided by the embodiment of the utility model;

[0041] Figure 3 It is the structural schematic diagram of battery box provided by the embodiment of the utility model;

[0042] Figure 4 It is the sectional view of battery box provided by the embodiment of the utility model;

[0043] Figure 5 It is Figure 4 The local enlarged view of A in;

[0044] Figure 6 It is the structural schematic diagram of box cover provided by the embodiment of the utility model.

[0045] Reference signs:

[0046] 10-box body, 110-first side plate, 120-second side plate, 130-third side plate, 140-bottom plate, 150-first support piece, 1510-first support part, 1520-second support part, 1530-support gap, 1540-first lead-through opening, 1550-second lead-through opening, 160-baffle, 170-longitudinal beam, 180-second support piece, 20-first installation area, 30-second installation area, 40-box cover, 410-first straight plate, 420-inclined plate, 430-second straight plate, 50-first battery module, 60-second battery module, 710-first pressure relief cavity, 720-second pressure relief cavity, 730-third pressure relief cavity, 740-fourth pressure relief cavity, 750-fifth pressure relief cavity, 810-cross beam, 820-stiffener. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model. In addition, it should be understood that the specific embodiments described herein are only used for illustrating and explaining the utility model, and are not used for limiting the utility model. In the utility model, the orientation words such as 'up' and 'down' are generally used for indicating the up and down in the actual use or working state of the device, and the specific is the drawing direction in the drawings; and 'inner' and 'outer' are used for the contour of the device.

[0048] Specifically, please refer to Figures 1 to 6 The battery box comprises a box body 10. The inside of the box body 10 has a first mounting area 20 and a second mounting area 30 distributed along a first direction. The first mounting area 20 and the second mounting area 30 are provided with battery modules. Wherein, along the second direction, the length of the first mounting area 20 is L1, and the length of the second mounting area 30 is L2, which satisfies: L1>L2. Wherein, the first direction is the height direction of the box body 10, and the first direction is arranged at an angle with the second direction.

[0049] In the embodiments of the present application, by forming the first mounting area 20 and the second mounting area 30 inside the box body 10, the battery modules can be respectively installed in the first mounting area 20 and the second mounting area 30, and a multi-layer stacked battery module structure is formed. Based on the length setting of the first mounting area 20 and the second mounting area 30, the space layout of the box body 10 can be more reasonable to adapt to the installation space of the SUV model, so as to fully utilize the installation space of the SUV model and improve the endurance of the vehicle.

[0050] Wherein, the first mounting area 20 and the second mounting area 30 are square mounting areas to adapt to the shape of the installation space of the SUV model.

[0051] In some embodiments, the first direction and the second direction are arranged at an acute angle. Alternatively, the first direction and the second direction are arranged at an obtuse angle. Alternatively, the first direction and the second direction are perpendicular to each other. In the embodiments of the present application, the first direction is preferably perpendicular to the second direction.

[0052] Based on the height direction of the box 10 as the first direction, in the first direction, the first mounting area 20 can be located below the second mounting area 30. In this way, the battery modules in the first mounting area 20 and the second mounting area 30 are stacked or spaced vertically. Since the length L1 of the first mounting area 20 is greater than the length L2 of the second mounting area 30, the length of the upper region of the box 10 can be shorter, which can better adapt to the installation space of the SUV model.

[0053] For example, L2 = 1 / 3L1. Alternatively, L2 = 1 / 2L1. Wherein, L1 can be set to 1600mm-2100mm. For example, the length L1 of the first mounting area 20 is set to 1600mm, 1800mm, 2100mm, or any value between any two of them.

[0054] In some embodiments, the width of the first mounting area 20 and the second mounting area 30 can be the same. The height of the first mounting area 20 and the second mounting area 30 can also be the same.

[0055] In some embodiments, the number of first mounting areas 20 can be set to one. One or more battery modules can be installed in the one first mounting area 20. The number of second mounting areas 30 can be set to one. One or more battery modules can be installed in the one second mounting area 30.

[0056] In some embodiments, the number of first mounting areas 20 can be set to at least two. The at least two first mounting areas 20 are arranged in sequence along the first direction. One or more battery modules can be installed in each first mounting area 20. The number of second mounting areas 30 can be set to at least two. The at least two second mounting areas 30 are arranged in sequence along the first direction. One or more battery modules can be installed in each second mounting area 30.

[0057] Wherein, the battery module can adopt a square cell, a soft package cell or a cylindrical cell. In the embodiment of the application, a cylindrical cell is preferably adopted.

[0058] In some embodiments, along the second direction, the end of the second mounting area 30 close to the first mounting area 20 is arranged.

[0059] It can be understood that based on the end of the second mounting area 30 close to the first mounting area 20, the second mounting area 30 can be located at the tail position of the SUV vehicle during installation, thereby fully utilizing the height space of the tail of the SUV model.

[0060] Please refer to Figure 1In some embodiments, the battery box further comprises a box cover 40. The box cover 40 covers the box body 10. The box cover 40 comprises a first straight plate 410, an inclined plate 420 and a second straight plate 430 connected in sequence. The first straight plate 410 is spaced apart from the second straight plate 430 along the second direction. The distance between the first straight plate 410 and the bottom surface of the box body 10 is D1, and the distance between the second straight plate 430 and the bottom surface of the box body 10 is D2. It is satisfied that D1 < D2.

[0061] It can be understood that the box cover 40 covers the box body 10 to seal the battery module in the battery box. The first straight plate 410 is spaced apart from the second straight plate 430 along the second direction, so that the first straight plate 410, the inclined plate 420 and the second straight plate 430 do not form a "Z" shaped connection structure. Based on the distance D1 between the first straight plate 410 and the bottom surface of the box body 10 being less than the distance D2 between the second straight plate 430 and the bottom surface of the box body 10, the height of the first mounting area 20 can be limited by the distance between the first straight plate 410 and the bottom surface of the box body 10, and the height of the first mounting area 20 and the second mounting area 30 can be limited by the distance between the second straight plate 430 and the bottom surface of the box body 10. Therefore, along the height direction of the box body 10, the projections of the first straight plate 410, the inclined plate 420 and the second straight plate 430 all coincide with the first mounting area 20, and the projection of the second straight plate 430 also coincides with the second mounting area 30.

[0062] The distance D2 between the second straight plate 430 and the bottom surface of the box body 10 is greater than or equal to 250 mm. For example, the distance D2 between the second straight plate 430 and the bottom surface of the box body 10 can be set to 250 mm, 280 mm, 300 mm, etc.

[0063] In some embodiments, the length of the first straight plate 410 can be set to 1000 mm to 1400 mm. The length of the second straight plate 430 can be set to 500 mm to 700 mm.

[0064] The shape of the upper surface of the box body 10 is matched with the shape of the box cover 40, so that the box cover 40 can be attached to the upper surface of the box body 10.

[0065] Please refer to Figure 6 In some embodiments, the inclined angle of the inclined plate 420 is α. It is satisfied that 30° ≤ α ≤ 60°.

[0066] It can be understood that the inclined angle of the inclined plate 420 will affect the shape and sealing performance of the box cover 40 and the box body 10. When the inclined angle α of the inclined plate 420 is less than 30°, the length of the inclined plate 420 will be too long, which will cause the length of the inclined plate 420 to be too long, resulting in excessive use of the box cover 40, causing cost increase and weight increase. When the inclined angle α of the inclined plate 420 is greater than 60°, the sealing difficulty of the box cover 40 and the box body 10 will be significantly increased.

[0067] For example, the inclination angle a of the inclined plate 420 can be set to 30 degrees, 45 degrees, 60 degrees, or any value between any two of them.

[0068] As shown in Figure 2 and Figure 3 In some embodiments, the box 10 includes two first side plates 110, a second side plate 120, a third side plate 130, and a bottom plate 140. The two first side plates 110 each extend in a second direction. The two first side plates 110 are spaced apart in a third direction. The third direction is arranged at an angle to both the first direction and the second direction. The second side plate 120 is connected between the first ends of the two first side plates 110. The third side plate 130 is connected between the second ends of the two first side plates 110. The bottom plate 140 is connected to the two first side plates 110, the second side plate 120, and the third side plate 130.

[0069] It can be understood that the first side plate 110, the second side plate 120, and the third side plate 130 form a side wall of the battery box. The side wall is connected to the bottom plate 140, thereby forming a space for accommodating the battery module.

[0070] The lower surface of the two first side plates 110 is attached to the bottom plate 140, and the shape of the upper surface of the two first side plates 110 is adapted to the shape of the box cover 40. Specifically, the upper surface of the first side plate 110 includes a first straight edge, an inclined edge, and a second straight edge. The distance between the first straight edge and the bottom plate 140 is less than the distance between the second straight edge and the bottom plate 140. The first straight edge corresponds to the first straight plate 410, the inclined edge corresponds to the inclined plate 420, and the second straight edge corresponds to the second straight plate 430.

[0071] In some embodiments, the height of the second side plate 120 is less than the height of the third side plate 130.

[0072] In some embodiments, the first direction, the second direction, and the third direction are all arranged at an acute angle. Alternatively, the first direction, the second direction, and the third direction are all arranged at an obtuse angle. Alternatively, the first direction, the second direction, and the third direction are all perpendicular to each other.

[0073] As shown in Figure 1 In some embodiments, the first direction can be the height direction of the box 10. The second direction can be the length direction of the box 10. The third direction can be the width direction of the box 10.

[0074] As shown in Figure 3 In some embodiments, the first side plate 110 is connected with a first support 150. The first support 150 is configured to support the battery module. The first support 150 is arranged at the junction of the first mounting area 20 and the second mounting area 30.

[0075] It is understood that by providing a first support member 150 on the first side plate 110 and positioning the first support member 150 at the boundary between the first mounting area 20 and the second mounting area 30, the area below the first support member 150 is the first mounting area 20, where the first battery module 50 is mounted. The area above the first support member 150 is the second mounting area 30, where the second battery module 60 is mounted on the first support member 150.

[0076] The first support member 150 can be welded to the first side plate 110. Alternatively, the first support member 150 can be fixed to the first side plate 110 by fasteners.

[0077] In some embodiments, a first support member 150 is provided on each of the two first side plates 110, and the first support member 150 is disposed on the side of the two first side plates 110 facing each other. The two first support members 150 may be symmetrically distributed along the long axis of the battery box.

[0078] like Figure 4 and Figure 5 As shown, in some embodiments, the first support member 150 is connected to a partition 160. The partition 160 is located at the boundary between the first mounting area 20 and the second mounting area 30. A battery module placed on the first support member 150 is spaced apart from the partition 160, and a first pressure relief chamber 710 is formed between the battery module and the partition 160.

[0079] It is understood that the partition 160 is horizontally positioned and placed on the first support member 150 to divide the first installation area 20 and the second installation area 30. Each of the two first side plates 110 is provided with a first support member 150, and the two ends of the partition 160 can respectively overlap the two first support members 150.

[0080] The battery module and the separator 160 are spaced apart, thereby forming a first pressure relief chamber 710 between them. When the battery module experiences thermal runaway, the first pressure relief chamber 710 can be used for safety protection.

[0081] Please see Figure 5 In some embodiments, the first side plate 110 is provided with a longitudinal beam 170. A first support member 150 is connected to the longitudinal beam 170. The first support member 150 contains a second pressure relief chamber 720. The longitudinal beam 170 contains a third pressure relief chamber 730. The first pressure relief chamber 710, the second pressure relief chamber 720, and the third pressure relief chamber 730 are interconnected.

[0082] It can be understood that the longitudinal beam 170 can be used to mount the first support 150, so that the first support 150 can be reliably fixed in the battery box. Among them, the longitudinal beam 170 can be welded with the first side plate 110 and the bottom plate 140 to ensure the reliable fixation of the longitudinal beam 170 in the battery box. The second pressure relief cavity 720 in the first support 150, the third pressure relief cavity 730 in the longitudinal beam 170 and the first pressure relief cavity 710 are communicated, and when the battery module located in the second mounting area 30 occurs thermal runaway, the target battery cell pressure relief gas can flow through the first pressure relief cavity 710, the second pressure relief cavity 720 and the third pressure relief cavity 730 in turn.

[0083] Among them, the explosion-proof valve can be configured on the second side plate 120, and the gas inlet of the explosion-proof valve is communicated with the third pressure relief cavity 730. Thus, when the battery module located in the second mounting area 30 occurs thermal runaway, the target battery cell pressure relief gas can flow through the first pressure relief cavity 710, the second pressure relief cavity 720 and the third pressure relief cavity 730 in turn, and is released to the outside of the battery pack through the explosion-proof valve, ensuring safety.

[0084] Please continue to refer to Figure 5 In some embodiments, the first support 150 includes a first support portion 1510 and a second support portion 1520. The first support portion 1510 is connected with the longitudinal beam 170. The second support portion 1520 is connected with the first support portion 1510, and the second support portion 1520 and the first support portion 1510 form a stepped support gap 1530. The support gap 1530 is configured to lap the partition plate 160. Among them, the second pressure relief cavity 720 is formed in the first support portion 1510. The first support portion 1510 is configured with a first through port 1540 and a second through port 1550 communicated with the second pressure relief cavity 720. The first through port 1540 is communicated with the first pressure relief cavity 710. The second through port 1550 is communicated with the third pressure relief cavity 730.

[0085] It can be understood that the support gap 1530 is formed by the first support portion 1510 and the second support portion 1520 to lap the partition plate 160, so as to realize the connection of the partition plate 160 and the first support 150. The second pressure relief cavity 720 is formed in the first support portion 1510, and the first through port 1540 and the second through port 1550 are configured in the first support portion 1510, so as to realize the communication of the second pressure relief cavity 720 and the first pressure relief cavity 710, and realize the communication of the second pressure relief cavity 720 and the third pressure relief cavity 730.

[0086] The first support part 1510 and the second support part 1520 are integrally formed. The first support part 1510 and the second support part 1520 are connected in a substantially "Z" shape, thereby forming a stepped support gap 1530. Based on the first support 150 being arranged on one side of each of the two first side plates 110 facing each other, the two sides of the partition plate 160 can be respectively overlapped on the two support gaps 1530 to achieve the placement of the partition plate 160.

[0087] Please continue to refer to Figure 5 In some embodiments, the first side plate 110 is further connected with a second support 180. The second support 180 is configured to support the battery module. The battery module placed on the second support 180 is arranged in a spaced manner with the bottom plate 140, and a fourth pressure relief cavity 740 is formed between the battery module and the bottom plate 140.

[0088] It can be understood that the second support 180 arranged on the side plate can be used to support the battery module in the first mounting area 20, and the battery module is arranged in a spaced manner with the bottom plate 140, thereby forming the fourth pressure relief cavity 740. When the battery module is in thermal runaway, the fourth pressure relief cavity 740 can be used for safety protection. The battery module in the first mounting area 20 is relieved through the first pressure relief cavity 710, and the battery module in the second mounting area 30 is relieved through the fourth pressure relief cavity 740, so that the battery module in the first mounting area 20 and the battery module in the second mounting area 30 have relatively independent pressure relief cavities, and the gas-electric isolation during thermal runaway is ensured.

[0089] The second support 180 can be welded to the first side plate 110. Alternatively, the second support 180 can be fixed to the first side plate 110 by a fastener.

[0090] In some embodiments, a second support 180 is arranged on each of the two first side plates 110, and the second support 180 is arranged on one side of each of the two first side plates 110 facing each other. The two second supports 180 can be symmetrically distributed along the long axis of the battery box. Based on the two symmetrically arranged second supports 180, the two ends of the battery module located in the first mounting area 20 can be respectively overlapped on the two second supports 180.

[0091] Please continue to refer to Figure 5 In some embodiments, a fifth pressure relief cavity 750 is constructed in the second support 180, and the third pressure relief cavity 730, the fourth pressure relief cavity 740 and the fifth pressure relief cavity 750 are communicated.

[0092] It can be understood that when the battery module located in the first mounting area 20 is in thermal runaway, the target cell pressure relief gas can flow through the fourth pressure relief cavity 740, the fifth pressure relief cavity 750 and the third pressure relief cavity 730 in sequence.

[0093] An explosion-proof valve can be constructed on the second side plate 120, and the gas inlet of the explosion-proof valve is connected to the third pressure relief chamber 730. Thus, when the battery module located in the first mounting area 20 experiences thermal runaway, the pressure relief gas from the target cell can flow sequentially along the fourth pressure relief chamber 740, the fifth pressure relief chamber 750, and the third pressure relief chamber 730, and be released to the outside of the battery pack through the explosion-proof valve, ensuring safety.

[0094] The battery modules in the first installation area 20 and the battery modules in the second installation area 30 ultimately release the pressure relief gas of the target cell to the outside of the battery pack through the third pressure relief chamber 730 and its corresponding explosion-proof valve. This can reduce the number of pressure relief chambers and explosion-proof valves, and reduce the cost of the battery box while ensuring safety.

[0095] In some embodiments, the height of the first pressure relief chamber 710 is H, satisfying the condition: 5 mm ≤ H ≤ 20 mm.

[0096] Understandably, the height of the first pressure relief chamber 710 affects the pressure relief effect. When the height H of the first pressure relief chamber 710 is less than 5 mm, the space of the first pressure relief chamber 710 is too small, which may cause excessive impact force of the pressure relief gas from the target cell, potentially damaging the separator 160, the first support member 150, the longitudinal beam 170, the first side plate 110, the second side plate 120, etc. When the height H of the first pressure relief chamber 710 is greater than 20 mm, the first pressure relief chamber 710 will occupy more height space in the battery box, resulting in a reduction in the thickness and capacity of the battery module, thus affecting the vehicle's range.

[0097] For example, the height H of the first pressure relief chamber 710 can be set to 5 mm, 10 mm, 15 mm, 20 mm, or any value between the two.

[0098] The height of the fourth pressure relief chamber 740 can be the same as the height of the first pressure relief chamber 710. The height of the second pressure relief chamber 720 can be reasonably selected based on the thickness of the first support 1510. The height of the third pressure relief chamber 730 can be reasonably selected based on the width of the longitudinal beam 170. The height of the fifth pressure relief chamber 750 can be reasonably selected based on the thickness of the second support member 180.

[0099] like Figure 2 As shown, in some embodiments, a crossbeam 810 is provided between the two first side plates 110. A reinforcing rib 820 is provided between the crossbeam 810 and the second side plate 120. Alternatively, a reinforcing rib 820 is provided between the crossbeam 810 and the third side plate 130.

[0100] It can be understood that the cross beam 810 can structurally reinforce the width direction of the battery box. The cross beam 810 can also structurally reinforce both ends of the length direction of the battery box by cooperating with the reinforcing rib 820.

[0101] Based on the arrangement of the cross beam 810 and the reinforcing rib 820, the structural strength of the battery box can be improved, and the energy absorption effect of the battery box can be improved by more than 30%.

[0102] For example, the reinforcing rib 820 can be arranged only between the cross beam 810 and the second side plate 120 in the battery box. Alternatively, the reinforcing rib 820 can be arranged only between the cross beam 810 and the third side plate 130 in the battery box.

[0103] In some embodiments, two cross beams 810 are arranged. One of the cross beams 810 is arranged close to the second side plate 120. The reinforcing rib 820 is arranged between the cross beam 810 and the second side plate 120. The other cross beam 810 is arranged close to the third side plate 130. The reinforcing rib 820 is arranged between the cross beam 810 and the third side plate 130.

[0104] It can be understood that two cross beams 810 can be arranged in the battery box. One of the cross beams 810 is arranged close to the second side plate 120, and the reinforcing rib 820 is arranged between the cross beam 810 and the second side plate 120. The other cross beam 810 is arranged close to the third side plate 130, and the reinforcing rib 820 is arranged between the cross beam 810 and the third side plate 130. The area between the two cross beams 810 is the first mounting area 20.

[0105] In some embodiments, the cross beam 810 can be arranged as a square beam, which spans the width direction of the battery box. The cross beam 810 can have a certain height, for example, the height of the cross beam 810 is the same as the height of the first battery module 50. The two ends of the cross beam 810 can be welded to the two first side plates 110. Alternatively, the two ends of the cross beam 810 can be fixed to the two first side plates 110 by fasteners. The bottom of the cross beam 810 can be welded to the bottom plate 140. Alternatively, the bottom of the cross beam 810 can be fixed to the bottom plate 140 by fasteners.

[0106] In some embodiments, the reinforcing rib 820 can be arranged as a square rib. The two ends of the reinforcing rib 820 can be welded to the cross beam 810 and the second side plate 120, respectively. Alternatively, the two ends of the reinforcing rib 820 can be fixed to the cross beam 810 and the second side plate 120, respectively, by fasteners. Alternatively, the two ends of the reinforcing rib 820 can be welded to the cross beam 810 and the third side plate 130, respectively. Alternatively, the two ends of the reinforcing rib 820 can be fixed to the cross beam 810 and the third side plate 130, respectively, by fasteners.

[0107] In some embodiments, the reinforcing ribs 820 are spaced apart in the third direction at least two. The distance between each adjacent two reinforcing ribs 820 is D3. It is satisfied that 60mm≤D3≤300mm.

[0108] It can be understood that the reinforcing ribs 820 extend in the second direction. The number of reinforcing ribs 820 is spaced apart in the third direction at least two, which can further improve the structural strength of the battery box and improve the energy absorption effect of the battery box.

[0109] The distance D3 between each adjacent two reinforcing ribs 820 affects the overall performance of the battery box. If the distance D3 between each adjacent two reinforcing ribs 820 is less than 60mm, when the battery box is impacted by external force and the reinforcing ribs 820 are deformed, the reinforcing ribs 820 are easy to cause the battery module to be extruded, which may cause safety hazards. If the distance D3 between each adjacent two reinforcing ribs 820 is greater than 300mm, the number of reinforcing ribs 820 arranged is less, and the structural reinforcement effect is not good.

[0110] For example, the distance D3 between each adjacent two reinforcing ribs 820 can be set to 60mm, 100mm, 150mm, 200mm, 250mm, 300mm, or any value between any two of them.

[0111] In some embodiments, the distance D3 between each adjacent two reinforcing ribs 820 can be the same. Alternatively, the distance D3 between each adjacent two reinforcing ribs 820 can be different. For example, the reinforcing ribs 820 are provided as four, namely No. 1 rib, No. 2 rib, No. 3 rib, and No. 4 rib. The distance between the No. 1 rib and the No. 2 rib is D31. The distance between the No. 2 rib and the No. 3 rib is D32. The distance between the No. 3 rib and the No. 4 rib is D33. It can be made that D31=D32=D33. Alternatively, it can be made that D31>D32>D33. Alternatively, it can be made that D31<D32<D33.

[0112] In some embodiments, the number of reinforcing ribs 820 is set to 2-5, and the number and distance of the reinforcing ribs 820 can be reasonably selected based on the width of the battery box. For example, the number of reinforcing ribs 820 is set to 2, 3, 4, or 5. Among them, the plurality of reinforcing ribs 820 can be symmetrically arranged along the long axis of the battery box, or can be asymmetrically arranged.

[0113] In some embodiments, the length of the reinforcing rib 820 in the second direction is L3. The width of the reinforcing rib 820 in the first direction is D4. It is satisfied that 60mm≤L3≤150mm, 50mm≤D4≤100mm.

[0114] It can be understood that the length and width of the reinforcing rib 820 will affect the layout inside the battery box. When the length L3 of the reinforcing rib 820 is less than 60 mm, the reinforcing rib 820 is prone to cause the battery module to be extruded when the battery box is subjected to external force impact to cause the reinforcing rib 820 to deform, which may cause a safety hazard. When the length L3 of the reinforcing rib 820 is greater than 150 mm, it will occupy more space inside the battery box, causing the space of the first mounting area 20 and the second mounting area 30 to decrease. Thus, the size of the first battery module 50 and the second battery module 60 will be reduced, and the capacity of the first battery module 50 and the second battery module 60 will also be reduced, which will affect the endurance of the vehicle. At the same time, when the length L3 of the reinforcing rib 820 is greater than 150 mm, it will also cause the reinforcing rib 820 to consume more materials and increase in weight. When the width of the reinforcing rib 820 is less than 50 mm, the reinforcing effect of the reinforcing rib 820 will be poor, which will affect the energy absorption effect of the battery box. When the width of the reinforcing rib 820 is greater than 100 mm, it will affect the spatial layout of the reinforcing rib 820.

[0115] For example, the length L3 of the reinforcing rib 820 is set to 60 mm, 80 mm, 100 mm, 120 mm, 150 mm, or any value between any two of them. The width D4 of the reinforcing rib 820 is set to 50 mm, 80 mm, 100 mm, or any value between any two of them.

[0116] The embodiments of the present application also provide a battery pack. The battery pack includes a first battery module 50, a second battery module 60, and a battery box as in the foregoing embodiments. The first battery module 50 is arranged in the first mounting area 20, and the second battery module 60 is arranged in the second mounting area 30.

[0117] In the embodiments of the present application, by forming the first mounting area 20 and the second mounting area 30 inside the box body 10, the first battery module 50 and the second battery module 60 can be respectively arranged in the first mounting area 20 and the second mounting area 30 to form a multi-layer stacked battery module structure. Based on the length arrangement of the first mounting area 20 and the second mounting area 30, the spatial layout of the box body 10 can be more reasonable to adapt to the installation space of the SUV vehicle, so as to fully utilize the installation space of the SUV vehicle and improve the endurance of the vehicle.

[0118] The length, width, and height of the first battery module 50 are respectively adapted to the length, width, and height of the first mounting area 20. The length, width, and height of the second battery module 60 are respectively adapted to the length, width, and height of the second mounting area 30.

[0119] In some embodiments, the first battery module 50 and the second battery module 60 each include a plurality of cylindrical battery cells.

[0120] The battery pack in the embodiments of the present application all adopts cylindrical battery cells, so as to reduce the cost of the battery pack and to be more easily standardized.

[0121] In some embodiments, the first mounting area 20 and the second mounting area 30 are both filled with a foaming layer.

[0122] It can be understood that after the first battery module 50 is mounted in the first mounting area 20 and the second battery module 60 is mounted in the second mounting area 30, the first battery module 50 and the second battery module 60 can be fixed by filling the foaming material into the first mounting area 20 and the second mounting area 30, and the foaming material forms a foaming layer. On the one hand, the fixation of the first battery module 50 and the second battery module 60 can be achieved without welding, which can simplify the production process to a certain extent. On the other hand, the first battery module 50 and the second battery module 60 can be protected, and the buffering capacity of the battery box can be improved.

[0123] The embodiments of the present application are described in detail above, and the principle and implementation mode of the present application are described by applying specific examples. The above description of the embodiments is only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, the specific implementation mode and application range will be changed according to the idea of the present application, and the above description should not be understood as a limitation of the present application.

Claims

1. A battery box characterized by, The battery box comprises: a box body, which has a first installation area and a second installation area distributed along a first direction, and the first installation area and the second installation area are provided with battery modules, wherein along a second direction, the length of the first installation area is L1 and the length of the second installation area is L2, and L1>L2, wherein the first direction is the height direction of the box body, and the first direction is arranged at an angle with the second direction.

2. The battery pack of claim 1, wherein, Along the second direction, the second installation area is arranged close to the end of the first installation area.

3. The battery case according to claim 1 or 2, characterized by The battery box further comprises: a box cover covering the box body; wherein the box cover comprises a first straight plate, an inclined plate and a second straight plate connected in sequence, and along the second direction, the first straight plate and the second straight plate are arranged at intervals, wherein the distance between the first straight plate and the bottom surface of the box body is D1, and the distance between the second straight plate and the bottom surface of the box body is D2, and D1 4. The battery pack of claim 3, wherein, The inclination angle of the inclined plate is α, and 30°≤α≤60°.

5. The battery case according to claim 1 or 2, characterized by The box body comprises: two first side plates, each extending along the second direction, and the two first side plates are arranged at intervals along a third direction, wherein the third direction is arranged at an angle with the first direction and the second direction; a second side plate connected between the first ends of the two first side plates; a third side plate connected between the second ends of the two first side plates; a bottom plate connected with the two first side plates, the second side plate and the third side plate.

6. The battery pack of claim 5, wherein, The first side plate is connected with a first support configured to support the battery modules, wherein the first support is arranged at the junction position of the first installation area and the second installation area.

7. The battery pack of claim 6, wherein, The first support is connected with a partition plate located at the junction position of the first installation area and the second installation area; wherein the battery modules placed on the first support are arranged at intervals with the partition plate, and a first pressure relief cavity is formed between the battery modules and the partition plate.

8. The battery pack of claim 7, wherein, The first side plate is provided with a longitudinal beam, and the first support is connected to the longitudinal beam, wherein a second pressure relief cavity is formed in the first support, a third pressure relief cavity is formed in the longitudinal beam, and the first pressure relief cavity, the second pressure relief cavity and the third pressure relief cavity are connected in communication.

9. The battery pack of claim 8, wherein, The first support comprises: a first support part connected with the longitudinal beam; a second support part connected with the first support part, and the second support part and the first support part form a stepped support gap, and the support gap is configured to overlap the partition plate; wherein the second pressure relief cavity is formed in the first support part, and the first support part is configured with a first through hole and a second through hole connected with the second pressure relief cavity, the first through hole is connected with the first pressure relief cavity, and the second through hole is connected with the third pressure relief cavity.

10. The battery pack of claim 8, wherein, The first side plate is further connected with a second support configured to support the battery modules, wherein the battery modules placed on the second support are arranged at intervals with the bottom plate, and a fourth pressure relief cavity is formed between the battery modules and the bottom plate.

11. The battery pack of claim 10, wherein, A fifth pressure relief cavity is arranged in the second support member, and the third pressure relief cavity, the fourth pressure relief cavity and the fifth pressure relief cavity are communicated.

12. The battery pack of claim 7, wherein, The cavity height of the first pressure relief cavity is H, and 5mm≤H≤20mm is satisfied.

13. The battery pack of claim 5, wherein, Two first side plates are arranged with a cross beam, and the cross beam is arranged with a reinforcing rib between the second side plate or the third side plate.

14. The battery pack of claim 13, wherein, The cross beam is arranged with two cross beams, one of which is arranged close to the second side plate, and the other of which is arranged close to the third side plate.

15. The battery pack of claim 13, wherein, Along the third direction, the reinforcing ribs are arranged with at least two reinforcing ribs, and the distance between each adjacent reinforcing rib is D3, and 60mm≤D3≤300mm is satisfied.

16. The battery pack of claim 13, wherein, Along the second direction, the length of the reinforcing rib is L3, and along the first direction, the width of the reinforcing rib is D4, and 60mm≤L3≤150mm and 50mm≤D4≤100mm are satisfied.

17. A battery pack, characterized by Comprising: a first battery module; a second battery module; the battery box according to any one of claims 1 to 16; wherein the first battery module is arranged in the first mounting area, the second battery module is arranged in the second mounting area, and the first mounting area and the second mounting area are filled with a foaming layer.

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