Frameless modular battery box, battery module and vehicle

Abstract

This specification discloses a frame-free modular battery box, a battery module and a vehicle, and relates to the field of power battery technology. The frame-free modular battery box includes at least one cover plate and at least one expandable box. The expandable box is a box with an open top composed of a cover plate and a plurality of side panels. The shape of the cover plate is adapted to the expandable box, and can be detachably connected to it and sealed. The side panels include inner side panels and outer side panels of the same height and staggered in the vertical direction, so that when the two expandable boxes are connected, the expandable box on top can be placed on top of the expandable box on the bottom, and the expandable box on the bottom can be sealed. It can be seen that the frame-free modular battery box can be expanded without a separate frame, and when the two expandable boxes are connected, there is only a layer of cover plate in between, which greatly improves the energy density of the frame-free modular battery box.

Description

Technical Field

[0001] The present invention relates to the field of power battery technology, and in particular to a frame-free modular battery box, a battery module and a vehicle. Background Art

[0002] In recent years, with the popularity of new energy vehicles, related industries such as power batteries and electric motors have also been developing rapidly. Compared with traditional vehicles that can quickly refuel, new energy vehicles have always been criticized for their slow charging speed, and users have higher and higher requirements for the range of new energy vehicles.

[0003] In the prior art, in order to meet the needs of users, new energy vehicles often integrate multiple groups of batteries. In particular, the power battery of new energy commercial vehicles usually includes an outer frame and multiple groups of battery boxes.

[0004] However, this integration approach has low energy density. Utility Model Content

[0005] This specification provides a frame-free modular battery box, a battery module and a vehicle to at least partially solve the above-mentioned problems existing in the prior art.

[0006] This manual adopts the following technical solutions:

[0007] This specification provides a frame-free modular battery box, including at least one cover plate and at least one expandable box body;

[0008] The expandable box is a box with an open top, comprising a cover plate and a plurality of side plates;

[0009] The shape of the cover plate is adapted to the expandable box body, and can be detachably connected to any one of the expandable boxes and seal it;

[0010] The side panels include an inner side panel and an outer side panel of the same height, and the outer side panel and the inner side panel are staggered in the vertical direction, so that during the connection of the two expandable boxes, the upper expandable box can be placed on top of the lower expandable box;

[0011] When any two expandable boxes are connected, the expandable box on the upper side can seal the expandable box on the lower side through the cover plate and the plurality of side plates provided thereon.

[0012] Preferably, the outer side panels and the inner side panels are staggered in the vertical direction, and the outer side panels are located above the inner side panels;

[0013] The inner surface of the outer side panel and the top surface of the inner side panel form a side panel groove, and the bottom of the inner side panel forms a side panel protrusion for cooperating with the side panel groove, so that when multiple expandable boxes are stacked in sequence, the outer side panels of the multiple expandable boxes are abutted in sequence, and the inner side panels of the multiple expandable boxes are abutted in sequence.

[0014] Preferably, the cover plate located at the bottom is provided with a vehicle fixing part, and the cover plate can be fixedly connected to other components of the vehicle through the vehicle fixing part.

[0015] Preferably, the cover plate is a double-layer composite structure, with a plurality of liquid separation baffles arranged inside and a coolant inlet and a coolant outlet arranged on the outer surface;

[0016] The liquid separation baffle can separate the space inside the cover plate and limit the flow direction of the liquid inside the cover plate, so that the coolant flowing in from the coolant inlet can flow out from the coolant outlet after flowing through at least part of the space inside the cover plate.

[0017] Preferably, the inner side panels and the outer side panels are both double-layer composite structures, and are each provided with a plurality of supporting connecting panels therein.

[0018] On the other hand, the present specification provides a battery module, including the frame-free modular battery box provided in the above aspect, and a plurality of battery cells.

[0019] Preferably, the plurality of battery cells are all arranged in the expandable box, and the plurality of battery cells are interconnected by a plurality of metal bars;

[0020] The plurality of metal bars are arranged on the top of the plurality of battery cells, and the surfaces of the plurality of metal bars are arranged with insulating heat-conducting coatings.

[0021] Preferably, the metal busbar is a copper busbar;

[0022] The insulating heat-conducting coating is heat-conducting silica gel.

[0023] Preferably, there are multiple expandable boxes, and the multiple expandable boxes are stacked in the vertical direction;

[0024] The tops and bottoms of the multiple battery cells are in close contact with the cover plate;

[0025] Cooling liquid circulates inside the cover plate to cool the multiple battery cells.

[0026] On the other hand, the present specification also provides a vehicle, comprising a frame-free modular battery box or battery module provided in any of the above aspects.

[0027] At least one of the above technical solutions adopted in this specification can achieve the following beneficial effects:

[0028] According to the above embodiment, the frame-free modular battery box includes at least one cover plate and at least one expandable box. The expandable box is a box with a top opening composed of a cover plate and a plurality of side panels. The shape of the cover plate is adapted to the expandable box, and can be detachably connected to any one of the expandable boxes and seal it. The side panels include an inner side panel and an outer side panel of the same height, and the outer side panel and the inner side panel are offset in the vertical direction, so that during the connection of the two expandable boxes, the expandable box on top can be placed on top of the expandable box on the bottom. When any two expandable boxes are connected, the expandable box on top can seal the expandable box on the bottom through the cover plate and the plurality of side panels provided thereon.

[0029] It can be seen from the above-mentioned frame-free modular battery box that the frame-free modular battery box can be expanded without a separate frame, and when two expandable boxes are connected, there is only a cover plate in between, which greatly improves the energy density of the frame-free modular battery box. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are used to provide a further understanding of this specification and constitute a part of this specification. The illustrative embodiments and descriptions of this specification are used to explain this specification and do not constitute an improper limitation on this specification. In the drawings:

[0031] Figure 1 A schematic diagram of the structure of a frame-free modular battery box provided for one embodiment of this specification;

[0032] Figure 2 A schematic diagram of the structure of an expandable box provided in one embodiment of this specification;

[0033] Figure 3 A schematic diagram of the structure of a frame-free modular battery box provided for one embodiment of this specification;

[0034] Figure 4 A schematic diagram of the structure of a side panel provided for one embodiment of this specification;

[0035] Figure 5 A schematic diagram of the structure of a side panel provided for one embodiment of this specification;

[0036] Figure 6 A partial structural schematic diagram of a frame-free modular battery box provided for one embodiment of the present specification;

[0037] Figure 7A partial structural schematic diagram of a frame-free modular battery box provided for one embodiment of the present specification;

[0038] Figure 8 A schematic diagram of the connection of an expandable box provided for one embodiment of this specification;

[0039] Fig. 9 A partial structural schematic diagram of a frame-free modular battery box provided for one embodiment of the present specification;

[0040] Fig.10 A schematic diagram of the structure of a cover plate provided for one embodiment of this specification;

[0041] Fig.11 A schematic diagram of the structure of a cover plate provided for one embodiment of this specification;

[0042] Fig.12 A schematic diagram of the structure of a battery module provided for one embodiment of this specification;

[0043] Fig.13 A partial structural schematic diagram of a battery module provided for one embodiment of this specification;

[0044] Fig.14 A partial structural diagram of a battery module provided in one embodiment of this specification

[0045] Fig.15 A partial structural schematic diagram of a battery module provided for one embodiment of this specification;

[0046] Fig.16 A schematic diagram of the structure of a side panel provided for one embodiment of the present specification.

[0047] Description of reference numerals:

[0048] Cover plate 1; expandable box body 2; side plate 21; inner side plate 211; outer side plate 212; support connecting plate 213; filling slot 214; connecting piece 22; vehicle fixing piece 16; coolant inlet 11; coolant outlet 12; liquid separation baffle 13; upper cover plate 14; lower cover plate 15; cooling cycle component 3; battery cell 4; metal row 41; insulating thermal conductive coating 42. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solutions and advantages of this specification more clear, the technical solutions of this specification will be clearly and completely described below in combination with the specific embodiments of this specification and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0050] In the description of the present invention, it should be noted that the term "or" is generally used in a meaning including "and / or", unless the content clearly indicates otherwise.

[0051] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. In addition, in the description of the present application, the terms "first", "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0052] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] The technical solutions provided by the embodiments of this specification are described in detail below in conjunction with the accompanying drawings.

[0054] Figure 1 This is a schematic diagram of the structure of a frame-free modular battery box provided in one embodiment of this specification. Figure 1 As shown, the frame-free modular battery box includes at least one cover plate 1 and at least one expandable box body 2.

[0055] Preferably, the frame-free modular battery box is applied to new energy vehicles.

[0056] Preferably, the frame-free modular battery box is used in commercial vehicles, such as trucks, special-purpose vehicles, military vehicles, engineering vehicles, buses with more than 9 seats, tractors, agricultural vehicles, mining vehicles, etc.

[0057] Preferably, the expandable box 2 is a box with an open top, including a cover plate 1 and a plurality of side plates 21 .

[0058] Preferably, the cover plate 1 constituting the expandable box body 2 is exactly the same as the cover plate 1 constituting the frame-free modular battery box. Therefore, in this specification, the cover plate 1 constituting the expandable box body 2 and the cover plate 1 constituting the frame-free modular battery box are both identified by the figure mark 1.

[0059] Figure 2 This is a schematic diagram of the structure of an expandable box 2 provided in one embodiment of this specification. Figure 2 As shown, the expandable box body 2 is composed of a plurality of side panels 21 and a cover panel 1 .

[0060] Preferably, the shape of the cover plate 1 is adapted to the expandable box body 2, and can be detachably connected to any one of the expandable box bodies 2 and seal it.

[0061] Figure 3 This is a schematic diagram of the structure of a frame-free modular battery box provided in one embodiment of this specification. Figure 3 As shown, the cover plate 1 seals the expandable box 2 .

[0062] Preferably, the side panel 21 includes an inner side panel 211 and an outer side panel 212 of the same height, and the outer side panel 212 and the inner side panel 211 are staggered in the vertical direction.

[0063] Preferably, the heights of the plurality of side panels 21 are the same, and they are mutually surrounded to form a box body side wall. The box body side wall is the side wall of the expandable box body 2.

[0064] It should be noted that the height of the side panel 21 refers to the European distance from one end to the other end of the side panel 21 in the expandable box 2 in a direction perpendicular to the cover plate 1 .

[0065] Preferably, the outer side plate 212 is located above the inner side plate 211 .

[0066] Preferably, the outer side plate 212 is located below the inner side plate 211 .

[0067] Figure 4 as well as Figure 5 Each of them is a schematic diagram of the structure of the side plate 21 provided in an embodiment of the present specification. Figure 4 As shown, the outer side plate 212 and the inner side plate 211 are staggered in the vertical direction, and the inner side plate 211 is slightly higher than the outer side plate 212. Figure 5 As shown, when the two side plates 21 are connected to each other, the two inner side plates 211 and the two outer side plates 212 are in contact with each other.

[0068] Preferably, the outer side panel 212 is located above the inner side panel 211, and the inner surface of the outer side panel 212 and the top surface of the inner side panel 211 form a side panel 21 groove, and the bottom of the inner side panel 211 forms a side panel 21 protrusion for matching with the side panel 21 groove, as shown in FIG. Figure 4 When two expandable boxes 2 are stacked in the vertical direction, the outer side panels 212 and the inner side panels 211 of the side panels 21 constituting the side walls of the boxes are abutted in sequence.

[0069] Preferably, the outer side plate 212 and the inner side plate 211 are both double-layer composite structures, and a plurality of supporting connecting plates 213 are arranged inside. Figure 4 shown.

[0070] Preferably, when any two expandable boxes 2 are connected, the expandable box 2 located on the upper side can seal the expandable box 2 located on the lower side through the cover plate 1 and the plurality of side plates 21 provided thereon.

[0071] Figure 6 A partial structural diagram of a frame-free modular battery box provided in one embodiment of this specification. Figure 6 As shown, the cover plate 1 of the expandable box body 2 located at the upper side seals the expandable box body 2 located at the lower side.

[0072] Preferably, the top of the cover plate 1 located at the top and the bottom of the cover plate 1 arranged at the bottom of the expandable box body are both provided with insulation materials and / or anti-collision plates.

[0073] Preferably, the expandable box 2 located at the bottom is provided with a vehicle fixing part 16 , and the expandable box 2 can be connected to the vehicle through the vehicle fixing part 16 .

[0074] Preferably, the expandable box 2 located at the bottom is provided with a vehicle fixing part 16, and the expandable box 2 can be fixedly connected via other components of the vehicle.

[0075] Preferably, the vehicle fixing member 16 is disposed on the cover plate 1 of the expandable box body 2 located at the bottom.

[0076] Preferably, the frame-free modular battery box can be directly fixed on vehicle components such as the frame and suspension device through the vehicle fixing parts 16 configured on the lowest expandable box body 2, without the need for fixing through the battery frame, thereby reducing the volume and mass of the supporting structure and improving the energy density.

[0077] Preferably, after the expandable box at the bottom is connected to the vehicle, the frame-free modular battery box can be expanded by adding a cover plate 1 and an expandable box 2 above the expandable box.

[0078] Figure 7 A partial structural diagram of a frame-free modular battery box provided in one embodiment of this specification. Figure 7 As shown, the frame-free modular battery box is placed at an angle, and a plurality of vehicle fixing parts 16 are distributed on the cover plate 1 of the expandable box body 2 located at the bottom.

[0079] Preferably, the frame-free modular battery box is configured with a plurality of connectors 22 .

[0080] Preferably, at least part of the connecting member 22 is arranged at the connection between the groove of the side panel 21 and the protrusion of the side panel 21, so that when the two frame-free modular battery boxes are in a stacked state, the side panels 21 of the two frame-free modular battery boxes can be detachably connected to fix the two frame-free modular battery boxes in a stacked state.

[0081] Preferably, at least part of the connector 22 is used to connect the cover plate 1 in the frame-free modular battery box to the expandable box body 2.

[0082] Figure 8 This is a schematic diagram of the connection of an expandable box 2 provided in one embodiment of this specification. Figure 8 As shown, the two expandable boxes 2 are connected by a connecting piece 22, and the connecting piece 22 connects the grooves of the side panels 21 and the protrusions of the side panels 21 that are closely attached to each other. The expandable box 2 and the cover plate 1 are also connected by the connecting piece 22.

[0083] Preferably, the multiple side panels 21 that mutually enclose the side wall of the box body are connected by welding.

[0084] It is understood by those skilled in the art that the connection technology between mechanical structures has been developed to a relatively mature level. This specification does not elaborate on the specific connection methods of various components, nor does it limit the connection methods between various components. Any commonly used connection methods in the field can be used, such as welding, bolt connection, rivet connection, etc.

[0085] According to the above embodiment, the frame-free modular battery box includes at least one cover plate 1 and at least one expandable box body 2. The expandable box body 2 is a box body with a top opening composed of a cover plate 1 and a plurality of side panels 21. The shape of the cover plate 1 is adapted to the expandable box body 2, and can be detachably connected to any one of the expandable boxes 2 and seal it. The side panel 21 includes an inner side panel 211 and an outer side panel 212 of the same height, and the outer side panel 212 is offset from the inner side panel 211 in the vertical direction, so that during the connection process of the two expandable boxes 2, the expandable box body 2 on top can be placed on top of the expandable box body 2 on the bottom. When any two expandable boxes 2 are connected, the expandable box body 2 on the top can seal the expandable box body 2 on the bottom through the cover plate 1 and the plurality of side panels 21 provided thereon.

[0086] According to the above-mentioned frame-free modular battery box, it can be seen that the frame-free modular battery box can be expanded without a separate frame, and when two expandable boxes 2 are connected, there is only a cover plate 1 in between, which greatly improves the energy density of the frame-free modular battery box.

[0087] Preferably, only one cover plate 1 is disposed between any two expandable boxes 2, and the cover plate 1 is the cover plate 1 constituting the expandable box 2 above.

[0088] Fig. 9 A partial structural diagram of a frame-free modular battery box provided in one embodiment of this specification. Fig. 9 As shown, the frame-free modular battery box is composed of two expandable boxes 2, and is only equipped with three cover plates 1 in total, with only one cover plate 1 in the middle.

[0089] Preferably, the cover plate 1 is a double-layer composite structure, with a coolant inlet 11 and a coolant outlet 12 disposed on the outer surface, and a liquid separation baffle 13 capable of limiting the flow direction of the coolant disposed inside.

[0090] Fig.10 as well as Fig.11 Each of them is a schematic diagram of the structure of the cover plate 1 provided in an embodiment of this specification. Fig.10 As shown, the coolant inlet 11 and the coolant outlet 12 are both arranged on the outer surface of the cover plate 1, and a liquid separation baffle 13 is arranged inside the cover plate 1. Fig.11 As shown, a plurality of liquid separation baffles 13 are disposed between the upper cover plate 14 and the lower cover plate 15 .

[0091] Preferably, the cover plate 1 is a sealed structure, and the coolant flowing inside the cover plate 1 will not leak to the outside of the cover plate 1.

[0092] The above is a frame-free modular battery box provided in one or more embodiments of this specification. Based on the same idea, this specification also provides a corresponding battery module.

[0093] Preferably, the battery module includes the frame-free modular battery box provided in any of the above embodiments, and a plurality of battery cells 4.

[0094] Preferably, the battery module also includes a cooling cycle component 3.

[0095] Preferably, the cooling circulation component 3 is respectively connected to the coolant inlet 11 and the coolant outlet 12 of each cover plate 1 for transmitting the coolant to each cover plate 1 .

[0096] Preferably, the cooling circulation component 3 is also used to independently control the flow speed and / or flow rate and / or temperature of the cooling liquid transmitted to each cover plate 1 .

[0097] Preferably, the cooling circulation component 3 is also used to control the flow velocity and / or flow rate and / or temperature of the cooling liquid transmitted to each cover plate 1 respectively.

[0098] For example, the cooling circulation component 3 delivers coolant at a flow rate of 1 L / s to the cover plate 1 that is in close contact with the battery cell 4 on both upper and lower sides, and delivers coolant at a flow rate of 0.5 L / s to the cover plate 1 that is in close contact with the battery cell 4 on only one side. Alternatively, when the ambient temperature is 20 degrees Celsius, the cooling circulation component 3 delivers coolant at a temperature of 6 degrees Celsius to the cover plate 1 that is in close contact with the battery cell 4 on both upper and lower sides, and delivers coolant at a flow rate of 20 degrees Celsius to the cover plate 1 that is in close contact with the battery cell 4 on only one side.

[0099] Those skilled in the art will understand that the technology related to the cooling cycle system has been developed to a relatively mature stage. For the sake of brevity, this specification does not describe the structure of the cooling cycle component 3 in detail, nor does it limit the specific structure of the cooling cycle component 3. Any cooling cycle equipment commonly used in the field can be used.

[0100] Fig.12 The schematic diagram of the structure of a battery module provided in one embodiment of this specification. Fig.12 As shown, the cooling cycle assembly 3 is respectively connected to a plurality of cover plates 1 of the frame-free modular battery box.

[0101] Preferably, the plurality of battery cells 4 are respectively arranged in each expandable box.

[0102] Preferably, a plurality of battery cells 4 are arranged in any expandable box 2 .

[0103] Fig.13 This is a partial structural diagram of a battery module provided in one embodiment of this specification. Fig.13 As shown, each expandable box 2 is provided with a plurality of battery cells 4 .

[0104] Preferably, the top and bottom of the plurality of battery cells 4 are in close contact with the cover plate 1, such as Fig.11 shown.

[0105] Preferably, for any battery cell 4 , the top and the bottom of the battery cell 4 are in close contact with the cover plate 1 .

[0106] It should be noted that, usually, one end of the battery cell 4 needs to be provided with a metal bar 41 so as to be connected with other battery cells 4. Moreover, the battery cell 4 provided with the metal bar 41 cannot be in direct contact with the cover plate 1.

[0107] Therefore, in a preferred embodiment provided in this specification, a metal bar 41 is disposed at one end of the battery cell 4, and an insulating thermal conductive coating 42 is sprayed on the metal bar 41 and / or the battery cell 4, and then the insulating thermal conductive coating 42 is closely attached to the cover plate 1. It can be understood by those skilled in the art that the close attachment does not mean direct contact, and the charged battery cell 4 cannot directly contact the liquid cooling plate.

[0108] It can be seen from the above battery module that the battery module realizes the configuration of liquid cooling plates at both ends of the battery cell 4 by circulating the coolant in the cover plate 1, thereby providing double-sided liquid cooling for the battery cell 4 in the power battery. In addition, the cooling circulation component 3 in the battery module can also independently adjust the flow rate and / or flow rate and / or temperature of the coolant supplied to each cover plate 1.

[0109] Preferably, the multiple battery cells 4 arranged in the same expandable box 2 are connected to each other through a plurality of metal bars 41 .

[0110] Preferably, the plurality of metal bars 41 are all disposed on the top of the battery cell 4 and are in close contact with the cover plate 1. It can be understood by those skilled in the art that the metal bars 41 are generally less resistant to compression and cannot withstand excessive pressure. Therefore, in one or more preferred embodiments provided in this specification, the metal bars 41 are all disposed on the top of the battery cell 4 and do not need to be compressed by the battery cell 4 affected by gravity.

[0111] Preferably, an insulating thermal conductive coating 42 is disposed between the plurality of metal bars 41 and the cover plate 1 .

[0112] Preferably, the metal busbar 41 is a copper busbar.

[0113] Preferably, the insulating thermally conductive coating 42 is thermally conductive silicone.

[0114] Fig.14 as well as Fig.15 Each of them is a partial structural schematic diagram of a battery module provided in an embodiment of this specification. Fig.14 As shown, multiple battery cells 4 are connected by metal bars 41. Fig.15 As shown, an insulating heat-conducting coating 42 is disposed between the metal bar 41 and the cover plate 1 .

[0115] Preferably, the flow rate and / or flow rate of the coolant in the cover plate 1 with both sides in close contact with the multiple battery cells 4 is greater than the flow rate and / or flow rate of the coolant in the cover plate 1 with only one side in close contact with the multiple battery cells 4 .

[0116] Preferably, when the temperature of the battery cell 4 is greater than or equal to a preset cold threshold, the temperature of the coolant in the cover plate 1 with both sides in close contact with the multiple battery cells 4 is lower than the flow rate temperature of the coolant in the cover plate 1 with only one side in close contact with the multiple battery cells 4. The cold threshold is a preset value, such as 0 degrees Celsius, -10 degrees Celsius, or -20 degrees Celsius.

[0117] Preferably, when the temperature of the battery cell 4 is lower than the cold threshold, the temperature of the coolant in the cover plate 1 which is in close contact with the battery cells 4 on both sides is higher than the flow rate temperature of the coolant in the cover plate 1 which is in close contact with the battery cells 4 on only one side.

[0118] Preferably, the interior of the inner side plate 211 is filled with heat-insulating material.

[0119] Preferably, the interior of the inner side plate 211 is divided into a plurality of filling grooves 214 by a plurality of supporting connecting plates 213 , and the thermal insulation material is filled in the filling grooves 214 .

[0120] Fig.16 This is a schematic diagram of the structure of the side panel 21 provided in one embodiment of the present specification. Fig.16 As shown, the heat-insulating material may be filled in a plurality of filling grooves 214 separated by a plurality of supporting connecting plates 213 .

[0121] It is understood by those skilled in the art that only one side of the cover plate 1 that is in close contact with the battery cell 4 is exposed to the air. Figure 3 In this case, when the ambient temperature is too low / too high, the coolant may exchange heat with the air through the shell of the cover plate 1, thereby reducing the cooling efficiency or heating efficiency of the coolant on the battery cell 4.

[0122] Especially when the ambient temperature is low (-10 degrees Celsius, -20 degrees Celsius), the temperature of the coolant is high (10 degrees Celsius, 15 degrees Celsius), so as to ensure that the battery cell 4 will not reduce efficiency or sleep due to too low temperature. At this time, the coolant will often exchange heat with the air through the shell of the cover plate 1, thereby reducing the temperature, thereby reducing the heating efficiency and insulation effect of the coolant on the battery cell 4.

[0123] Therefore, in one or more preferred embodiments of the present specification, a side of the cover plate 1 that is not in close contact with the plurality of battery cells 4 is provided with a heat-insulating material and / or an anti-collision plate.

[0124] Preferably, the multiple expandable boxes 2 are electrically connected via metal connectors.

[0125] Preferably, the battery module also includes a power management system.

[0126] Preferably, the number of the power management systems is 1.

[0127] Preferably, the power management system is configured in the uppermost expandable box 2 .

[0128] Preferably, the power management system is configured in the lowermost expandable box 2 .

[0129] Preferably, the power management system is used to control the power output of the multiple battery cells 4 in the multiple expandable boxes 2.

[0130] Preferably, the power management system is electrically connected to electrical equipment, a control host and other components in the vehicle.

[0131] The above are frame-free modular battery boxes and battery modules provided in one or more embodiments of this specification. Based on the same idea, this specification also provides corresponding vehicles.

[0132] Preferably, the vehicle includes a frame-free modular battery box or battery module provided by any one of the above-mentioned embodiments.

[0133] It should be noted that all actions of acquiring signals, information or data in this application are carried out in compliance with the relevant data protection laws and policies of the country where they are located, and with the authorization given by the owner of the corresponding device.

[0134] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0135] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0136] The above description is only an embodiment of this specification and is not intended to limit this specification. For those skilled in the art, this specification may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this specification should be included in the scope of the claims of this application.

Claims

1. A frame-free modular battery box, characterized in that: It includes at least one cover plate and at least one expandable box; The expandable box is a box with an open top, comprising a cover plate and a plurality of side plates; The shape of the cover plate is adapted to the expandable box body, and can be detachably connected to any one of the expandable boxes and seal it; The side panels include an inner side panel and an outer side panel of the same height, and the outer side panel and the inner side panel are staggered in the vertical direction, so that during the connection of the two expandable boxes, the upper expandable box can be placed on top of the lower expandable box.

2. The frame-free modular battery box according to claim 1, characterized in that: The outer side panels are staggered with the inner side panels in the vertical direction, and the outer side panels are located above the inner side panels; The inner surface of the outer side panel and the top surface of the inner side panel form a side panel groove, and the bottom of the inner side panel forms a side panel protrusion for cooperating with the side panel groove, so that when multiple expandable boxes are stacked in sequence, the outer side panels of the multiple expandable boxes are abutted in sequence, and the inner side panels of the multiple expandable boxes are abutted in sequence.

3. The frame-free modular battery box according to claim 1, characterized in that: The cover plate located at the bottom is provided with a vehicle fixing part, and the cover plate can be fixedly connected with other components of the vehicle through the vehicle fixing part.

4. The frame-free modular battery box according to any one of claims 1 to 3, characterized in that: The cover plate is a double-layer composite structure, with a plurality of liquid separation baffles arranged inside and a coolant inlet and a coolant outlet arranged on the outer surface; The liquid separation baffle can separate the space inside the cover plate and limit the flow direction of the liquid inside the cover plate, so that the coolant flowing in from the coolant inlet can flow out from the coolant outlet after flowing through at least part of the space inside the cover plate.

5. The frame-free modular battery box according to any one of claims 1 to 3, characterized in that: The inner side panels and the outer side panels are both double-layer composite structures, and are each provided with a plurality of supporting connecting panels.

6. A battery module, characterized in that: It comprises the frame-free modular battery box as described in any one of claims 1 to 5, and a plurality of battery cells.

7. The battery module according to claim 6, characterized in that: The multiple battery cells are all arranged in the expandable box, and the multiple battery cells are interconnected by multiple metal bars; The plurality of metal bars are arranged on the top of the plurality of battery cells, and the surfaces of the plurality of metal bars are arranged with insulating heat-conducting coatings.

8. The battery module according to claim 7, characterized in that: The metal busbar is a copper busbar; The insulating heat-conducting coating is heat-conducting silica gel.

9. The battery module according to claim 6, 7 or 8, characterized in that: There are multiple expandable boxes, and the multiple expandable boxes are stacked in the vertical direction; The tops and bottoms of the multiple battery cells are in close contact with the cover plate; Cooling liquid circulates inside the cover plate to cool the multiple battery cells.

10. A vehicle, characterized in that: It comprises the frame-free modular battery box as described in any one of claims 1-5 or the battery module as described in any one of claims 6-9.

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