CN117525704A - Battery box, battery package and vehicle - Google Patents

Abstract

The present disclosure discloses a battery case, a battery pack, and a vehicle. The battery box includes: the battery cell accommodating unit is provided with a plurality of battery cell accommodating spaces, one longitudinal end of each battery cell accommodating space is closed, and the other longitudinal end of each battery cell accommodating space is formed into a battery cell inlet and outlet. According to the battery box body, through all setting up the electric core access & exit at electric core accommodation space's vertical other end, conveniently accomplish the electricity of electric core at electric core accommodation space's vertical same end and connect the operation for convenient operation is swift, is favorable to saving time and cost.

Description

Battery box, battery package and vehicle

Technical Field

The disclosure relates to the technical field of batteries, and in particular relates to a battery box, a battery pack with the battery box and a vehicle with the battery pack.

Background

In the related art, the battery pack comprises a battery box body and a plurality of battery cells arranged in the battery box body, and more longitudinal beams and transverse beams are arranged in the battery box body to separate the battery cells, so that not only is space wasted, but also the battery pack is heavier and has higher cost; and the battery cell shell jointly form a battery module, and then the battery module is integrally placed in the shell of the battery box body, so that the battery pack process is complex, the cost is high, the electric connection among a plurality of battery modules is complex, and the electric connection operation is inconvenient and the cost is high.

Disclosure of Invention

The present disclosure aims to solve, at least to some extent, one of the above-mentioned technical problems in the prior art. For this reason, this disclosure proposes a battery box, and convenient electric connection operation.

The disclosure also provides a battery pack with the battery box.

The disclosure also provides a vehicle with the battery pack.

The battery case according to an embodiment of the present disclosure includes: the battery cell accommodating unit is provided with a plurality of battery cell accommodating spaces, one longitudinal end of each battery cell accommodating space is closed, and the other longitudinal end of each battery cell accommodating space is formed into a battery cell inlet and outlet.

According to the battery box body disclosed by the embodiment of the disclosure, through setting the battery core access opening at the other longitudinal end of the battery core accommodating space, the electric connection operation of the battery core is conveniently completed at the same longitudinal end of the battery core accommodating space, so that the operation is convenient and quick, the time and the cost are saved, the cross beam is omitted, and the volume utilization rate and the volume energy density of the battery box body are improved.

According to some embodiments of the present disclosure, the battery case further includes a peripheral structure closing one end of the battery cell accommodation space in a longitudinal direction, and the other end of the battery cell accommodation space in the longitudinal direction is formed as the battery cell inlet/outlet.

According to some embodiments of the disclosure, the peripheral structure further comprises: the side frames are fixed on two opposite sides of the battery cell accommodating unit; the back sealing plate is fixedly connected with the side frames, and the back sealing plate seals one longitudinal end of the electric core accommodating space.

According to some embodiments of the disclosure, the peripheral structure further comprises: the bottom guard board is positioned on the same side of the battery cell containing unit and the side frame, and is fixedly connected with the side frame, and is also fixedly connected with the rear sealing plate.

According to some embodiments of the disclosure, the side frames are framed beam structures and have cavities therein.

According to some embodiments of the disclosure, the cavity comprises a plurality of side cavities, each of the side cavities extending in a longitudinal direction of the cell receiving space.

According to some embodiments of the present disclosure, the side frame is a "sun" beam and includes a first side cavity and a second side cavity, the first side cavity being located on a side of the second side cavity remote from the bottom guard plate.

According to some embodiments of the disclosure, the first side cavity and the second side cavity are formed by bending a same sheet metal part.

According to some embodiments of the disclosure, a side of the side frame facing away from the battery cell accommodating unit is provided with a box lifting lug.

According to some embodiments of the disclosure, a front bottom plate is further disposed at one end of the battery cell containing unit, which has the battery cell inlet and outlet, a power distribution unit mounting position is disposed on the front bottom plate, and the front bottom plate is fixed with the battery cell containing unit and/or the bottom guard plate.

According to some embodiments of the present disclosure, the bottom guard plate is separated from the cell accommodating unit to form an installation space, the battery case further includes a thermal management unit including a cooling plate disposed in the installation space and attached to the cell accommodating unit, and the cooling plate has a cooling flow channel therein.

According to some embodiments of the disclosure, the thermal management unit further comprises a flow control unit for controlling the flow within the cooling flow channel.

According to some embodiments of the disclosure, an insulating layer is provided between the cooling plate and the bottom guard plate.

According to some embodiments of the present disclosure, the bottom guard plate includes guard plate body and guard plate turn-ups, the guard plate turn-ups are located the edge of guard plate body and including relative first side turn-ups, second side turn-ups that set up and connect first side turn-ups the connection turn-ups of second side turn-ups, first side turn-ups the second side turn-ups are fixed with the side frame that corresponds, the connection turn-ups with the back shrouding is fixed.

Optionally, the guard board flanging is 3mm-5mm in height.

According to some embodiments of the disclosure, the rear sealing plate comprises a sealing plate body and a sealing plate flange, the sealing plate flange is located at one end of the sealing plate body facing the bottom guard plate, and the sealing plate flange is fixed with the connecting flange.

According to some embodiments of the disclosure, the cell housing unit includes a plurality of sub-units, each of the sub-units includes a first longitudinal cavity and a second longitudinal cavity extending along a longitudinal direction, the plurality of sub-units are arranged along a transverse direction and two adjacent sub-units are welded and fixed.

According to some embodiments of the disclosure, the first longitudinal cavity and the second longitudinal cavity are formed by bending a same sheet metal part.

According to some embodiments of the present disclosure, the rear sealing plate and the bottom guard plate are sheet metal parts, and the thickness of the rear sealing plate is 0.8mm-2.0mm, and the thickness of the bottom guard plate is 0.8mm-1.2mm.

According to some embodiments of the disclosure, a portion of the outer wall of the cell housing unit is configured as a housing of the battery case.

According to some embodiments of the disclosure, an outer wall of the cell receiving unit facing away from the bottom guard plate is configured as a housing of the battery case.

According to some embodiments of the disclosure, the battery case further comprises a cover plate fixedly connected with the same longitudinal end of the battery cell accommodating unit, the side frames and the bottom guard plate, the top of the battery cell accommodating unit is provided with a top wall plate extending towards the cover plate, and the cover plate is suitable for being fixedly connected with the top wall plate.

According to the battery pack of the second aspect of the embodiment of the disclosure, the battery pack comprises the battery cells and the battery box body, wherein the battery cells are arranged in the corresponding battery cell accommodating spaces.

A vehicle according to an embodiment of a third aspect of the present disclosure includes the above-described battery pack.

Additional aspects and advantages of the disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the disclosure.

Drawings

Fig. 1 is a schematic perspective view of a battery case according to an embodiment of the present disclosure;

FIG. 2 is an exploded schematic view of a battery case according to an embodiment of the present disclosure;

FIG. 3 is a schematic view of a rear closure plate;

fig. 4 is a perspective view of a sub-unit of the cell housing unit;

fig. 5 is a front view of the sub-unit of the cell housing unit;

FIG. 6 is a schematic perspective view of a side frame;

FIG. 7 is a front view of a side frame;

FIG. 8 is a schematic perspective view of a bottom shield;

FIG. 9 is a schematic perspective view of the front floor;

FIG. 10 is a schematic perspective view of a thermal management unit;

FIG. 11 is a schematic perspective view of a thermal insulation layer;

fig. 12 is an exploded schematic view of a battery pack according to an embodiment of the present disclosure;

FIG. 13 is a schematic illustration of a vehicle according to an embodiment of the disclosure;

FIG. 14 is a partial schematic view of a cell containment unit and side frames;

fig. 15 is a partial cross-sectional view of a battery case according to an embodiment of the present disclosure.

Reference numerals:

vehicle 1000, battery pack 100, battery case 10, battery cell housing unit 1, sub unit 11, first longitudinal chamber 12, end first flange 121, second longitudinal chamber 13, top wall plate 14, partition wall plate 15, side wall plate 16, end second flange 131, side frame 2, first side chamber 21, end first flange 211, second side chamber 22, end second flange 221, bottom shield 3, shield body 31, first flange 32, first mounting hole 321, second flange 33, connecting flange 34, third mounting hole 341, flange stiffener 35, rear seal plate 4, seal plate body 41, seal plate flange 42, seal plate mounting hole 421, roll-in feature 43, case tab 5, tab body 51, tab bolt housing 52, front base plate 6, distribution unit mounting location 61, securing hole 62, stiffener 63, thermal management unit 7, cooling plate 71, flow control unit 72, thermal insulation layer 8, bolt 9, battery cell 20, cover 30, distribution unit 40.

Detailed Description

Embodiments of the present disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and intended for the purpose of explaining the present disclosure and are not to be construed as limiting the present disclosure.

In the description of the present disclosure, it should be understood that the terms "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate an orientation or positional relationship based on that shown in the drawings, merely for convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present disclosure.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present disclosure, the meaning of "a plurality" is at least two, such as two, three, etc., unless explicitly specified otherwise.

In the present disclosure, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may communicate with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art as the case may be.

The battery case 10, the battery pack 100 having the battery case 10, and the vehicle 1000 having the battery pack 100 described above according to the embodiment of the present disclosure are described in detail below with reference to fig. 1 to 15.

Referring to fig. 1-2 and 12, a battery case 10 according to an embodiment of the first aspect of the present disclosure may include a battery cell receiving unit 1.

The battery cell accommodation unit 1 is provided with a plurality of battery cell accommodation spaces, the battery cell 20 is suitable for being installed in the battery cell accommodation spaces, the battery cell 20 can be a core body without a shell, the battery cell accommodation unit 1 is not only a battery cell shell, the battery cell 20 is effectively protected, the battery cell accommodation unit 1 is a part of the shell of the battery box 10, the effect of multipurpose and full utilization is achieved, the battery cell shell is not required to be additionally arranged, and the battery cell structural part is reduced, so that the die sinking of the battery cell shell is saved, the process of the battery pack 100 is simplified, and the cost of the battery pack 100 is reduced. The cell housing unit 1 may be manufactured by a roll forming process using high-strength steel.

One end of the battery cell accommodating space is closed in the longitudinal direction, and the other end of the battery cell accommodating space is formed into a battery cell inlet and outlet, in other words, the battery cell inlet and outlet is communicated with the battery cell accommodating space. The electric core 20 can be assembled to the corresponding electric core accommodation space from the electric core access opening, and the electric connection sockets of the electric cores 20 of the electric core accommodation spaces are all positioned at the same longitudinal end of the electric core accommodation space, so that the electric connection operation of the electric core 20 is conveniently finished at the same longitudinal end of the electric core accommodation space, the operation steps are simplified, and the electric connection difficulty is reduced.

According to the battery box 10 disclosed by the embodiment of the disclosure, through setting the battery core access opening at the other longitudinal end of the battery core accommodating space, the electric connection operation of the battery core 20 is conveniently completed at the same longitudinal end of the battery core accommodating space, so that the operation is convenient and quick, the time and the cost are saved, the cross beam is omitted, and the volume utilization rate and the volume energy density of the battery box are improved.

The battery case 10 according to the embodiment of the present disclosure may further include a peripheral structure closing one end of the battery cell receiving space in the longitudinal direction, and the other end of the battery cell receiving space in the longitudinal direction is formed as the above-described battery cell inlet and outlet.

Referring to fig. 1-2 and 12, the peripheral structure may include a side frame 2 and a rear seal plate 4. The side frames 2 are fixed on two opposite sides of the battery cell containing unit 1, as shown in fig. 1-2, the left side and the right side of the battery cell containing unit 1 are both provided with the side frames 2, in some alternative embodiments, the side frames 2 are of a frame type beam structure, and the inner parts of the side frames 2 are provided with cavities, so that the side frames 2 have better collision performance, after the battery pack 100 including the battery box body 10 is mounted on the vehicle 1000, when the vehicle 1000 collides laterally, the side frames 2 can deform to absorb collision energy, and the energy absorbing capability of the side frames 2 is obviously improved due to the cavities. In other alternative embodiments, the side frame 2 may be a single layer plate.

The upper surface of the side frame 2 can be flush with the upper surface of the battery cell accommodating unit 1, so that the top surface of the battery box 10 is flat and attractive. The side frame 2 can avoid damage to the battery box 10 by external foreign matters in the driving process. The back sealing plate 4 is fixedly connected with the side frame 2, and the back sealing plate 4 seals the longitudinal end of the electric core accommodating space, and the end of the electric core accommodating space, which is far away from the back sealing plate 4, is an electric core inlet and outlet. Referring to fig. 1-2, the battery cell accommodating space extends longitudinally, namely extends along the front-back direction shown in fig. 1, the rear sealing plate 4 seals the rear end of the battery cell accommodating space, sealing of the rear end of the battery cell accommodating space is achieved, and the battery cell inlet and outlet are located at the front end of the battery cell accommodating space.

Referring to fig. 3, the rear sealing plate 4 is provided with rolling features 43, where the rolling features 43 may be formed by rolling, and the rolling features 43 are beneficial to improving rigidity of the rear sealing plate 4 and improving local mode, and the rolling depth may be 2mm.

Referring to fig. 1-2, 8 and 12, the peripheral structure may further include a bottom guard plate 3, where the bottom guard plate 3 is located on the same side of the cell accommodating unit 1 and the side frame 2, and the bottom guard plate 3 is fixedly connected to the rear sealing plate 4. Referring to fig. 1 to 2, the bottom guard plate 3 is positioned below the cell housing unit 1 and the side frames 2. The bottom guard plate 3 can protect the lower part of the cell housing unit 1. The bottom guard plate 3 is a stamping sheet metal part, and the thickness of the sheet metal part is 0.8mm-1.2mm.

The battery box 10 is a high-strength steel box, the heat conductivity coefficient of steel is obviously lower than that of aluminum alloy, the heat radiation of the exhaust pipe to the battery pack 100 is reduced, and the heat damage influence of tail gas to the battery pack 100 is effectively reduced.

According to the battery box 10 of the embodiment of the disclosure, through setting up the electric core accommodation unit 1 that is used for holding electric core 20, saved the electric core shell among the prior art, be favorable to saving battery box 10 inner space for battery box 10 compact structure, simultaneously, the inside of side frame 2 has the cavity, can promote the anticollision performance of battery box 10. The inside of the battery box 10 does not contain a stiffening beam, and compared with the prior art of fixing a module through an inner beam, the battery box 10 of the present disclosure saves a large amount of space in the lateral direction (i.e., the left-right direction shown in fig. 1) and the longitudinal direction (i.e., the front-rear direction shown in fig. 1), improves the volume utilization rate of the battery pack 100, and ensures that the battery pack 100 has a higher volume energy density.

In some embodiments of the present disclosure, the cavity inside the side frame 2 includes a plurality of side cavities, each extending in the longitudinal direction of the cell receiving space, i.e., in the front-to-rear direction shown in fig. 1.

In some embodiments of the present disclosure, referring to fig. 2 and 6-7, the side frame 2 may be configured as a "sun" beam, which has higher strength than a "mouth" beam, and can resist a larger load from the outside during extrusion, thereby effectively protecting the state of the battery cell 20 and ensuring the safety performance of the battery pack 100. Specifically, the side frame 2 includes a first side chamber 21 and a second side chamber 22, that is, the plurality of side chambers includes the first side chamber 21 and the second side chamber 22, and the first side chamber 21 is located on a side of the second side chamber 22 away from the bottom guard plate 3, that is, the first side chamber 21 is located above the second side chamber 22. In the event of a collision of the side frames 2, both the first side chamber 21 and the second side chamber 22 may collapse and absorb energy to absorb collision energy.

Optionally, the side frame 2 can be manufactured by adopting high-strength steel through a roll forming process, compared with an extruded aluminum alloy frame, the die opening step is omitted, the production period is shortened, and meanwhile, the high-strength steel and the aluminum alloy have higher strength and elastic modulus, so that the side frame 2 achieves the purpose of light weight while ensuring higher strength.

Referring to fig. 7, for each side frame 2, the first side cavity 21 and the second side cavity 22 thereof may be formed by bending the same sheet metal part, and the end first side flange 211 of the sheet metal part is bent toward the inside of the first side cavity 21, and the end second side flange 221 of the sheet metal part is bent toward the inside of the second side cavity 22, which is beneficial to ensuring good air tightness after welding.

In some other embodiments of the present disclosure, the side frames 2 may also be configured as other forms of beam structures, such as "mesh" beams or irregular cross-section beams.

In some embodiments of the present disclosure, as shown with reference to fig. 1-2, a side of the side frame 2 facing away from the battery cell receiving unit 1 is provided with a box shackle 5, and in particular, the box shackle 5 may include a shackle body portion 51 and a shackle bolt sleeve 52, and the shackle bolt sleeve 52 is embedded and fixed to the shackle body portion 51. When the battery pack 100 including the battery case 10 is applied to the vehicle 1000, the bolts are fastened to the vehicle body through the shackle bolt housings 52 to achieve fixation of the battery case 10 to the vehicle body. The lug bolt sleeve 52 can be formed by adopting a cold heading process, the lug bolt sleeve 52 is plugged into the lug body portion 51, and the flange face circumference of the lug bolt sleeve 52 is welded and fixed with the lug body portion 51, so that the lug body portion 51 is prevented from being crushed by the bolts. The box lug 5 welds into an organic whole through the lug body portion 51 of roll-in and lug bolt cover 52, and accessible adjustment roll-in cross-section, roll-in steel sheet thickness and roll-in number nimble adjustment welds box lug 5 intensity after an organic whole, welds on the side frame 2 after the box lug 5 after welding into an organic whole, can be according to the nimble position of adjusting box lug 5 of different automobile bodies.

The left surface of the left side frame 2 and the right surface of the right side frame 2 are respectively provided with a box lifting lug 5, and each box lifting lug 5 on the side frame 2 can be one or a plurality of box lifting lugs.

In some embodiments of the present disclosure, referring to fig. 1-2 and 9, the end of the cell housing unit 1 having the cell inlet and outlet is further provided with a front bottom plate 6, in other words, the front bottom plate 6 is located at the front end of the cell housing unit 1. The front chassis 6 is provided with a power distribution unit mounting position 61, and as shown in fig. 15, the power distribution unit 40 can be mounted at the power distribution unit mounting position 61 by using a fastener, so that the power distribution unit 40 can be mounted, and the number of the power distribution unit mounting positions 61 can be one or multiple. There is a space above the front floor 6, and the power distribution unit 40 may be installed above the front floor 6. In the specific example shown in fig. 9, the power distribution unit mounting locations 61 are configured as standoff studs. In other embodiments, the power distribution unit mounting locations 61 may also be configured as mounting holes.

The front base plate 6 is fixed to the cell receiving unit 1 and/or the bottom cover 3. Specifically, in some embodiments of the present disclosure, the front chassis 6 may be fixed to the front end of the cell housing unit 1 by welding. In other embodiments of the present disclosure, the front bottom plate 6 and the bottom guard plate 3 are fixed by rivet nuts, as shown in fig. 9, the front bottom plate 6 is provided with fixing holes 62, and the rivet nuts are connected with the bottom guard plate 3 through the fixing holes 62. The front floor 6 is separated from the bottom guard 3 to mount other components such as a thermal management unit 7, an insulation layer 8, and the like. In other embodiments of the present disclosure, the front bottom plate 6 is fixed to the front end of the cell housing unit 1 by welding, and is fixed to the bottom guard plate 3 by riveting nuts. The front chassis 6 is provided with a plurality of reinforcing ribs 63, and the reinforcing ribs 63 extend in the lateral direction of the battery case 10, that is, in the left-right direction of the battery case 10. The ribs 63 may be stamped features, with the plurality of ribs 63 being evenly distributed over a large face of the front floor 6.

In some embodiments of the present disclosure, referring to fig. 1-2 and 10, the bottom guard plate 3 is separated from the cell housing unit 1 to form an installation space, and the installation space is defined by the cell housing unit 1, the side frames 2, the bottom guard plate 3, and the rear seal plate 4. The battery box 10 may further include a thermal management unit 7, the thermal management unit 7 is used for realizing thermal management of the battery pack 100, the thermal management unit 7 includes a cooling plate 71, the cooling plate 71 is disposed in the installation space, the cooling plate 71 is attached to the battery cell accommodating unit 1, a cooling flow channel is formed in the cooling plate 71, in this way, a cooling medium in the cooling flow channel can cool a battery cell in the battery cell accommodating unit 1, the cooling plate 71 can be attached to the lower surface of the battery cell accommodating unit 1 by using a heat conducting structural adhesive, so as to realize fixation and heat transmission, and the cooling plate 71 can be formed by soldering after stamping.

In some embodiments of the present disclosure, referring to fig. 1-2 and 10, the thermal management unit 7 includes a cooling plate 71 and a flow control unit 72, the flow control unit 72 is disposed at a front end of the cooling plate 71, and the flow control unit 72 is used to control a flow rate in a cooling flow passage.

In some embodiments of the present disclosure, as shown with reference to fig. 1-2, 11, a thermal insulation layer 8 is provided between the thermal management unit 7 and the bottom shield 3. The thickness of the heat preservation layer 8 can be 8mm-10mm, and the heat preservation layer 8 has a lower heat conduction coefficient so as to realize the heat preservation function of the battery pack. Alternatively, the heat-insulating layer 8 may be heat-insulating cotton or heat-insulating glue. The heat insulating layer 8 may be adhered to the lower surface of the cooling plate 71.

In some embodiments of the present disclosure, referring to fig. 1-2, 8, the bottom guard 3 may include a guard body 31 and a guard cuff located at an edge of the guard body 31, and the guard cuff may have a height of 3mm-5mm, for example, 4mm.

The backplate turn-ups include the relative first side turn-ups 32 that set up, second side turn-ups 33 and be used for connecting the connection turn-ups 34 of first side turn-ups 32, second side turn-ups 33, and first side turn-ups 32, second side turn-ups 33 are fixed with the side frame 2 that corresponds, and connection turn-ups 34 are fixed with back shrouding 4, have seted up the mounting hole on the backplate turn-ups. Specifically, the first side flange 32 is provided with a first mounting hole 321, the left bolt 9 passes through the first mounting hole 321 and then is fastened to the left side frame 2, the second side flange 33 is provided with a second mounting hole, the right bolt 9 passes through the second mounting hole and then is fastened to the right side frame 2, and therefore the bottom guard plate 3 and the side beam are conveniently detached and separated, and therefore components in the mounting space are conveniently maintained. The first side flange 32, the connecting flange 34 and the second side flange 33 are continuous and uninterrupted flanges so as to prevent high-pressure water from directly impacting the heat insulation layer 8 and realize a good sealing function.

The first mounting holes 321 are plural, and the pitches of the plural first mounting holes 321 are appropriate, and the arrangement cannot be excessively large and small. The second mounting holes are multiple, the spacing between the second mounting holes is proper, and the arrangement cannot be too large or too small.

Referring to fig. 8, the apron body 31 is provided with burring ribs 35 to increase the strength of the bottom apron 3. The turn-up reinforcing ribs 35 may be constructed in a grid-like structure, for example, the turn-up reinforcing ribs 35 include three transverse ribs and four longitudinal ribs. The specific number of the flanging reinforcing ribs 35 can be adjusted according to the size of the bottom guard plate 3. The flanging stiffener 35 is a stamped feature with a stamped depth of 2mm and a stamped width of 25mm-30mm.

In some embodiments of the present disclosure, referring to fig. 1-3 and 8, the rear sealing plate 4 may include a sealing plate body 41 and a sealing plate flange 42, where the rolling feature 43 is disposed on the sealing plate body 41, and the rolling feature 43 covers a large portion of the surface of the sealing plate body 41, so as to improve rigidity of the sealing plate body 41 and improve local mode, and the sealing plate flange 42 is located at an end of the sealing plate body 41 facing the bottom guard 3, that is, the sealing plate flange 42 is located at a lower end of the sealing plate body 41, and the sealing plate flange 42 is fixed with the connecting flange 34. Specifically, the sealing plate flange 42 is provided with a sealing plate mounting hole 421, the connecting flange 34 is provided with a third mounting hole 341, and the fastener passes through the sealing plate mounting hole 421 and the third mounting hole 341.

The third mounting holes 341 are plural, and the pitches of the plural third mounting holes 341 are appropriate, and the arrangement cannot be excessively large and small.

The rear sealing plate 4 can be formed by bending and rolling a sheet metal part, and the thickness selection range of the sheet metal part is 0.8mm-2.0mm.

In some embodiments of the present disclosure, sealing fixation may also be achieved by adopting schemes such as coating structural glue fixation, coating structural glue+bolting fixation, mounting sealing glue+bolting fixation, and the like between the bottom guard plate 3 and the rear seal plate 4, and between the rear seal plate 4 and the side frame 2.

In some embodiments of the present disclosure, referring to fig. 1-2 and 4-5, the battery cell housing unit 1 includes a plurality of sub-units 11, each sub-unit 11 includes a first longitudinal cavity 12 and a second longitudinal cavity 13 extending in a longitudinal direction, the first longitudinal cavity 12 and the second longitudinal cavity 13 are independent from each other, as shown in fig. 4-5, the first longitudinal cavity 12 is located at a left side of the second longitudinal cavity 13, and the first longitudinal cavity 12 and the second longitudinal cavity 13 each extend in a front-rear direction shown in fig. 1. As shown in fig. 1-2, a plurality of sub-units 11 are arranged in the lateral direction, and two adjacent sub-units 11 are welded and fixed. The adjacent two sub-units 11 are attached to each other, so that the top surface of the cell housing unit 1 has good sealing performance, and the space utilization rate can be improved to the greatest extent. In order to realize the sealing of the battery box 10, the welding parts of two adjacent sub-units 11 are preferably fully welded or the sealing glue is coated between the two adjacent sub-units 11 for subsequent welding, and the gap filler can be coated between the two adjacent sub-units 11. Referring to fig. 5, each sub-unit 11 may be formed by bending the same sheet metal part, that is, the first longitudinal cavity 12 and the second longitudinal cavity 13 are formed by bending the same sheet metal part, and the first flange 121 at the end of the sheet metal part is bent toward the inside of the first longitudinal cavity 12, and the second flange 131 at the end of the sheet metal part is bent toward the inside of the second longitudinal cavity 13, so that good air tightness is ensured after welding.

The sub-units 11 may be manufactured by a roll forming process using high strength steel having a thickness of 0.8 mm.

In other embodiments of the present disclosure, the battery cell housing unit 1 is an integral unit, so that the battery case 10 can be ensured to have good sealability.

In other embodiments of the present disclosure, a portion of the outer wall of the battery cell housing unit 1 is configured as a housing of the battery case 10, so that the battery cell housing unit 1 is a portion of the housing of the battery case 10, and the battery cell housing unit 1 may be a battery cell housing, so as to effectively protect the battery cell 20, thereby achieving the effects of multipurpose and full use. And the material of a part of the housing of the battery case 10 can be saved, which is advantageous in reducing the cost of the battery pack 100.

According to the battery box 10 of the embodiment of the disclosure, by arranging the battery cell accommodating unit for accommodating the battery cell 20, a battery cell housing in the prior art is saved, the space in the battery box is saved, the structure of the battery box is compact, and a part of the outer wall of the battery cell accommodating unit 1 is formed into the shell of the battery box 10, so that the structure of the battery box 10 is more compact, and the cost of the battery box 10 is reduced.

In further embodiments of the present disclosure, the outer wall of the cell receiving unit 1 facing away from the bottom cover 3 is formed as a housing of the battery case 10. As shown in fig. 1-2, the top outer wall of the cell housing unit 1 is configured as a housing of the battery case 10.

In some embodiments of the present disclosure, referring to fig. 12, the battery case 10 may further include a cover plate 30, where the cover plate 30 is fixedly connected to the same end of the battery cell receiving unit 1, the side frame 2, and the bottom guard plate 3 in the longitudinal direction, the cover plate 30 is disposed at the front end of the battery case 10, and the cover plate 30 is fixed to the front end of the battery cell receiving unit 1, the front end of the side frame 2, and the front end of the bottom guard plate 3. Referring to fig. 1-2, the front end of the side rail 2 is free of a baffle to which a first fastener is fastened after passing through the cover plate 30. Referring to fig. 2 and 14-15, the top of the cell housing unit 1 has a top wall plate 14, the top wall plate 14 protrudes in the direction of a cover plate 30, in other words, the top wall plate 14 protrudes forward, and the cover plate 30 is adapted to be fixedly connected with the top wall plate 14. The two adjacent cell accommodating spaces are separated by a partition wall plate 15, the top wall plate 14 extends forward from the front end of the partition wall plate 15, in some examples, a fixing hole may be formed in the top wall plate 14, and the second fastener 50 may be fastened in the front end fixing hole of the top wall plate 14 after passing through the cover plate 30. Alternatively, the second fastener 50 may be a bolt and nut fastener, or may be a rivet.

Optionally, the cover plate 30 is detachably connected with the cell accommodating unit 1, the side frame 2 and the bottom guard plate 3, so that the cover plate 30 is conveniently detached to connect the cells 20, and operations such as installation and maintenance are performed on the power distribution unit 40. Sealing rings can be further arranged between the cover plate 30 and the battery cell containing unit 1, between the cover plate and the side frames 2 and between the cover plate and the bottom guard plate 3, so that the sealing and waterproof performances of the battery box body 10 are improved.

Referring to fig. 2 and 14 to 15, the side of the cell housing unit 1 has a side wall plate 16 protruding toward the cover plate 30, and the side wall plate 16 is fixedly connected to the side frame 2. The adjacent two cell accommodation spaces are separated by the separation wall plate 15, and the length of the side wall plate 16 along the front-back direction is larger than that of the separation wall plate 15 along the front-back direction, so that the welding seam length of the cell accommodation unit 1 and the side frame 2 during welding can be increased, and the connection firmness degree of the cell accommodation unit 1 and the side frame 2 is improved.

The battery pack 100 according to the second aspect of the present disclosure includes the battery cells 20 and the battery case 10 of the above embodiments, where the battery cells 20 are disposed in the corresponding battery cell accommodating spaces. The whole battery box 10 electrophoresis and the insulation sheet outside the battery cell 20 form double insulation protection for the battery cell 20, and the out-of-control probability of the battery cell 20 is effectively reduced.

According to the battery pack 100 of the embodiment of the present disclosure, since the battery cell accommodating unit 1 is provided, the structure is compact, and at the same time, since the side frame 2 having the cavity is provided, the side impact resistance is good.

Referring to fig. 13, a vehicle 1000 according to an embodiment of the third aspect of the present disclosure includes the battery pack 100 of the above-described embodiment.

According to the vehicle 1000 of the embodiment of the present disclosure, since the battery pack 100 of the above-described embodiment is provided, it is advantageous to improve the collision performance.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.

Although embodiments of the present disclosure have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the present disclosure, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the present disclosure.

Claims (24)

1. A battery box, comprising:

the battery cell accommodating unit (1), the battery cell accommodating unit (1) is provided with a plurality of battery cell accommodating spaces, one longitudinal end of each battery cell accommodating space is closed, and the other longitudinal end of each battery cell accommodating space is formed into a battery cell inlet and outlet.

2. The battery compartment of claim 1, further comprising a peripheral structure closing one longitudinal end of the cell receiving space, the other longitudinal end of the cell receiving space being formed as the cell inlet/outlet.

3. The battery compartment of claim 2, wherein the peripheral structure comprises:

the side frames (2) are fixed on two opposite sides of the battery cell accommodating unit (1);

the rear sealing plate (4), the rear sealing plate (4) with side frame (2) are fixed link to each other, just rear sealing plate (4) seal electric core accommodation space's vertical one end.

4. The battery compartment of claim 3, wherein the peripheral structure further comprises:

bottom backplate (3), bottom backplate (3) are located electric core accommodation unit (1) with the same side of side frame (2), just bottom backplate (3) with side frame (2) are fixed link to each other, bottom backplate (3) still with back shrouding (4) are fixed link to each other.

5. A battery compartment according to claim 3, characterized in that the side frames (2) are frame-like beam structures and have cavities inside.

6. The battery compartment of claim 5, wherein the cavity includes a plurality of side cavities, each side cavity extending longitudinally of the cell receiving space.

7. The battery box according to claim 4, characterized in that the side frame (2) is a "sun" beam and comprises a first side cavity (21) and a second side cavity (22), the first side cavity (21) being located on the side of the second side cavity (22) remote from the bottom guard (3).

8. The battery box according to claim 7, characterized in that the first side chamber (21) and the second side chamber (22) are formed by bending the same sheet metal part.

9. Battery compartment according to any of claims 3-8, characterized in that the side of the side frame (2) facing away from the cell receiving unit (1) is provided with a compartment lifting lug (5).

10. The battery box according to claim 4, wherein a front bottom plate (6) is further arranged at one end of the battery cell containing unit (1) with the battery cell inlet and outlet, a power distribution unit mounting position (61) is arranged on the front bottom plate (6), and the front bottom plate (6) is fixed with the battery cell containing unit (1) and/or the bottom guard plate (3).

11. The battery box according to claim 4 or 10, characterized in that the bottom guard plate (3) is separated from the battery cell containing unit (1) to form an installation space, the battery box further comprises a thermal management unit (7), the thermal management unit (7) comprises a cooling plate (71), the cooling plate (71) is arranged in the installation space and is attached to the battery cell containing unit (1), and a cooling flow channel is formed in the cooling plate (71).

12. The battery box according to claim 11, characterized in that the thermal management unit (7) further comprises a flow control unit (72), the flow control unit (72) being adapted to control the flow in the cooling flow channel.

13. The battery box according to claim 11, characterized in that an insulating layer (8) is provided between the cooling plate (71) and the bottom shield (3).

14. The battery box according to claim 11, wherein the bottom guard plate (3) comprises a guard plate body (31) and a guard plate flange, the guard plate flange is located at the edge of the guard plate body (31) and comprises a first side flange (32), a second side flange (33) and a connecting flange (34) for connecting the first side flange (32) and the second side flange (33), the first side flange (32) and the second side flange (33) are fixed with the corresponding side frame (2), and the connecting flange (34) is fixed with the rear sealing plate (4).

15. The battery compartment of claim 14, wherein the guard flange has a height of 3mm to 5mm.

16. The battery compartment of claim 14, wherein the rear sealing plate (4) comprises a sealing plate body (41) and a sealing plate flange (42), the sealing plate flange (42) is located at one end of the sealing plate body (41) facing the bottom guard (3), and the sealing plate flange (42) is fixed with the connecting flange (34).

17. The battery box according to claim 1, wherein the cell housing unit (1) comprises a plurality of sub-units (11), each sub-unit (11) comprises a first longitudinal cavity (12) and a second longitudinal cavity (13) extending along a longitudinal direction, the plurality of sub-units (11) are arranged along a transverse direction and two adjacent sub-units (11) are welded and fixed.

18. The battery box according to claim 17, wherein the first longitudinal cavity (12) and the second longitudinal cavity (13) are formed by bending a same sheet metal part.

19. The battery box according to claim 4, characterized in that the rear sealing plate (4) and the bottom guard plate (3) are sheet metal parts, the thickness of the rear sealing plate (4) is 0.8mm-2.0mm, and the thickness of the bottom guard plate (3) is 0.8mm-1.2mm.

20. The battery compartment as claimed in claim 1, characterized in that a part of the outer wall of the cell receiving unit (1) is formed as a housing of the battery compartment.

21. The battery compartment as claimed in claim 4, characterized in that the outer wall of the cell receiving unit (1) facing away from the bottom guard (3) is designed as a housing of the battery compartment.

22. The battery box according to claim 4, further comprising a cover plate (30), wherein the cover plate (30) is fixedly connected with the same longitudinal end of the battery cell containing unit (1), the side frames (2) and the bottom guard plate (3), a top wall plate (14) extending towards the cover plate (30) is arranged at the top of the battery cell containing unit (1), and the cover plate (30) is suitable for being fixedly connected with the top wall plate (14).

23. A battery pack, comprising:

a battery cell (20);

and the battery box of any one of claims 1-22, the battery cells (20) being disposed within the corresponding battery cell receiving spaces.

24. A vehicle comprising the battery pack of claim 23.