CN114267915A

CN114267915A - Battery box and vehicle

Info

Publication number: CN114267915A
Application number: CN202111436216.9A
Authority: CN
Inventors: 谭义; 戴明亮
Original assignee: Sany Heavy Industry Co Ltd
Current assignee: Sany Lithium Energy Co ltd
Priority date: 2021-11-29
Filing date: 2021-11-29
Publication date: 2022-04-01
Anticipated expiration: 2041-11-29
Also published as: CN114267915B

Abstract

The invention relates to the technical field of power batteries, and provides a battery box and a vehicle, wherein the battery box comprises a first connecting piece and a plurality of battery modules, each battery module comprises a supporting plate and a battery cell, the battery cells are paved on at least one side surface of the supporting plate, the battery cells are connected to the supporting plate, and the battery modules are stacked in the direction away from the plane where the supporting plate is located and are connected through the first connecting piece. This battery box need not the battery framework, and the backup pad occupies that the volume is less and compact with the structural configuration of electric core, has increased the energy density of battery box. And need not to customize the battery framework that corresponds according to the electric quantity demand of difference, reduced the manufacturing cost of battery box.

Description

Battery box and vehicle

Technical Field

The invention relates to the technical field of power batteries, in particular to a battery box and a vehicle.

Background

With the development of new energy electric technology and the more and more attention paid to environmental problems by people. The electric vehicle becomes a new development direction of the automobile industry due to the technical advantages of no pollution and zero emission. In addition to the common automobiles which have generally adopted batteries as driving energy sources, more and more engineering vehicles also adopt batteries as driving energy sources, such as electric heavy trucks and the like. The power source of the electric automobile is a power battery pack, namely a battery box, mounted on the automobile body.

The current battery box generally comprises a battery frame body and a plurality of standard battery packs, wherein the battery frame body is used for loading the plurality of standard battery packs, each standard battery pack is fixed on the battery frame body through a mechanical fixing structure, and the standard battery packs are mutually connected through cables, water pipes, communication lines and the like. In order to ensure that the vehicle has enough driving range, enough standard battery packs are required in the battery box. However, the dead weight of the battery frame is heavy and the volume is large, and the battery frame occupies a large volume space of the whole battery box, so that the energy density of the whole battery box is low.

Disclosure of Invention

The invention provides a battery box and a vehicle, which are used for solving the problem that the energy density of the battery box is low because a battery frame body is adopted to load a plurality of standard battery packs in the battery box in the prior art.

The invention provides a battery box which comprises a first connecting piece and a plurality of battery modules, wherein each battery module comprises a supporting plate and a battery cell, the battery cells are paved on at least one side surface of the supporting plate and connected to the supporting plate, and the battery modules are arranged in a stacking mode in the direction away from the plane of the supporting plate and connected through the first connecting piece.

According to the battery box provided by the invention, the heat exchange flow channel is arranged in the supporting plate and comprises a liquid inlet main flow channel, a liquid outlet main flow channel and a plurality of branch flow channels, the branch flow channels are arranged in parallel, and the liquid inlet main flow channel and the liquid outlet main flow channel both extend along the arrangement direction of the branch flow channels.

According to the battery box provided by the invention, the battery module further comprises at least one bearing bracket, the bearing bracket is connected to the supporting plate, and the plurality of battery cells are arranged on the plurality of bearing brackets, so that the battery cells can be borne on the bearing brackets under the condition that the supporting plate is vertically placed.

According to the battery box provided by the invention, one end of the battery cell is provided with the positive and negative electrode lug, and one end of the battery cell, which is far away from the positive and negative electrode lug, is fixedly bonded with the bearing support; and/or the side part of the battery cell is fixedly bonded with the support plate.

According to the battery box provided by the invention, the battery box comprises at least one first battery module and two second battery modules, the first battery module is positioned between the two second battery modules, a plurality of battery cores are paved on two side surfaces of the first battery module, and a plurality of battery cores of the second battery modules are paved on the side surface, close to the first battery module, of the supporting plate.

According to the battery box provided by the invention, the battery box comprises at least one third battery module, the number of the supporting plates of the third battery module is two, a plurality of battery cores are respectively paved on the mutually close side surfaces of the two supporting plates of the third battery module, and the two supporting plates of each third battery module are connected through a second connecting piece.

The battery box provided by the invention further comprises a packaging part, wherein the packaging part comprises a plurality of sealing plates, the battery modules are stacked to form a battery assembly, and the sealing plates are wrapped on the side edge of the battery assembly and connected with the battery modules through the first connecting piece.

According to the battery box provided by the invention, the supporting plates of the plurality of battery modules are detachably connected through the first connecting piece; the first connecting piece comprises a connecting rod, first mounting holes are formed in positions corresponding to the support plates, and the connecting rod penetrates through the corresponding first mounting holes in the support plates; and a sleeve is arranged between every two adjacent battery modules and sleeved on the connecting rod.

According to the battery box provided by the invention, the battery box further comprises a heating film, the heating film is arranged between two adjacent battery modules, and/or the heating film is arranged between two adjacent layers of battery cores in the battery modules.

The invention also provides a vehicle comprising any one of the battery boxes.

According to the battery box and the vehicle provided by the invention, the plurality of battery modules are arranged in a stacked manner, and each battery module comprises the supporting plate and the plurality of battery cells laid on the side surface of the supporting plate. The plurality of battery modules connected together may be packaged by an encapsulation member to form a battery case as a whole. Compared with a battery box structure formed by accommodating a plurality of packaged standard battery packs through a battery frame body in the prior art, the battery box provided by the invention does not need the battery frame body, the occupied volume of the supporting plate is smaller, the occupied volume ratio of the battery cell in the battery box is increased, and the structural layout of the supporting plate and the battery cell is compact, so that the energy density of the battery box is increased. And need not to customize the battery framework that corresponds according to the electric quantity demand of difference, reduced the manufacturing cost of battery box.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is an exploded view of a battery case provided by the present invention;

fig. 2 is a schematic diagram of cell arrangement of a battery module in a battery box provided by the invention;

fig. 3 is an exploded view of a first battery module in a battery box according to the present invention;

fig. 4 is a plan view of a first battery module in a battery box provided by the present invention;

fig. 5 is a side view of a first battery module in a battery box provided by the present invention;

fig. 6 is a side view of a second battery module in a battery box provided by the present invention;

fig. 7 is a plan view of a third battery module in the battery box according to the present invention;

fig. 8 is a side view of a third battery module in a battery box provided by the present invention;

fig. 9 is a schematic perspective view of a third battery module in the battery box according to the present invention;

fig. 10 is a schematic layout diagram of two adjacent layers of battery cells in a battery box provided by the invention;

FIG. 11 is a schematic view of heat exchange flow channels in support plates in a battery box provided by the present invention;

fig. 12 is a schematic view of a package structure of a battery box provided by the present invention;

reference numerals:

1. a first connecting member; 11. A connecting rod; 12. A locking member;

2. a battery module; 21. A support plate; 211. A first mounting hole;

22. an electric core; 23. A load bearing support; 201. A first battery module;

202. a second battery module; 203. A third battery module; 3. A second connecting member;

41. a first seal plate; 42. A second seal plate; 43. A third seal plate;

44. a fourth closing plate; 401. A second mounting hole; 51. A liquid inlet main channel;

52. a liquid outlet main flow channel; 53. Branching the flow channel; 6. Heating the film;

7. a sleeve; 8. Aluminum bars.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that the terms "first", "second", "third", "fourth" and "fifth" are used for the sake of clarity in describing the numbering of the product parts and do not represent any substantial difference, unless explicitly stated or limited otherwise. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations. Further, "a plurality" means two or more. In the specification and claims, "and/or" means at least one of connected objects, a character "/" generally means that the former and latter related objects are in an "or" relationship.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The battery case of the present invention will be described below with reference to fig. 1 to 12.

As shown in fig. 1, a battery box according to an embodiment of the present invention includes a first connecting member 1 and a plurality of battery modules 2. The battery module 2 includes a support plate 21 and a cell 22. At least one side of the support plate 21 is laid with a plurality of battery cells 22, and the battery cells 22 are connected to the support plate 21. A plurality of battery modules 2 are stacked in a direction away from the plane of the support plate 21 and connected by the first connecting member 1.

Wherein, this battery box still includes the encapsulation piece, and a plurality of battery module 2 pass through the encapsulation piece and encapsulate the battery box that becomes overall structure. When the battery box is used, the battery box can be placed according to the actual wiring condition of the battery box. For example, the battery box is placed such that the support plate 21 is disposed in a vertical direction, or the battery box is placed such that the support plate 21 is disposed in a horizontal direction, or the battery box is placed such that the support plate 21 is disposed in an oblique direction.

The stacking direction of the plurality of battery modules 2 is determined according to the direction in which the support plates 21 are arranged. For example, the support plate 21 is disposed in a vertical direction, and the plurality of battery modules 2 are stacked laterally in a horizontal direction. For another example, when the support plate 21 is disposed in the horizontal direction, the plurality of battery modules 2 are stacked in the vertical direction.

Among them, the support plate 21 may be a planar plate-shaped member. A plurality of battery modules 2 are stacked to form a stacked structure of a plurality of layers of support plates 21 and a plurality of layers of battery cells 22. One layer of cells 22 or a plurality of layers of cells 22 may be laid on the side of the support plate 21.

In the embodiment of the present invention, in order to ensure that the cells 22 in the stacked structure have good heat dissipation, only one layer of cells 22 is laid on the side surface of the support plate 21. Each battery module 2 includes at least one support plate 21, at least one row of battery cells 22 is laid on at least one side of each support plate 21, and each row of battery cells 22 includes a plurality of battery cells 22. Adjacent cells 22 in each row of cells 22 are electrically connected in series, such as by aluminum bars 8. Two rows of cells 22 on the same battery module 2 are electrically connected end to end in series. The plurality of battery cells 22 may be bonded to the support plate 21 by an adhesive not limited to a structural adhesive to form the individual battery module 2.

In the battery box provided by the embodiment of the invention, the plurality of battery modules 2 are stacked, and each battery module 2 comprises a support plate 21 and a plurality of battery cells 22 laid on the side surface of the support plate 21. The plurality of battery modules 2 connected together may be packaged by an enclosure to form a battery case as a whole. Compared with a battery box structure formed by accommodating a plurality of packaged standard battery packs through a battery frame in the prior art, the battery box provided by the invention does not need the battery frame, the supporting plate 21 occupies a smaller volume, the occupied volume ratio of the battery cell 22 in the battery box is increased, and the structural layout of the supporting plate 21 and the battery cell 22 is compact, so that the energy density of the battery box is increased. And need not to customize the battery framework that corresponds according to the electric quantity demand of difference, reduced the manufacturing cost of battery box.

As shown in fig. 11, in some embodiments of the present invention, a heat exchange flow channel is formed in the support plate 21, so that a heat exchange region is formed in a region of the support plate 21 corresponding to the heat exchange flow channel. A cooling liquid can be introduced into the heat exchange flow channel to dissipate heat of the battery cell 22 on the support plate 21. The heat exchange flow channel is provided with a flow channel inlet and a flow channel outlet, the flow channel inlet is used for being connected with the liquid inlet pipe, and the flow channel outlet is used for being connected with the liquid outlet pipe.

The support plate 21 may be made of a metal material having good heat conductivity, such as an aluminum alloy. The support plate 21 is cooled by the cooling liquid in the heat exchange flow channel, so that the battery cell 22 laid on the support plate 21 is cooled. The heat exchange area on the support plate 21 corresponds to an area for laying the battery cell 22 on the support plate 21, so as to improve the heat dissipation efficiency.

In the embodiment of the invention, the heat dissipation of the battery box is realized by arranging the replacement hot runner in the support plate 21, and a water cooling plate does not need to be arranged independently. The volume ratio of the battery cell 22 in the battery box is further increased, the energy density of the battery box is improved, and the production cost of the battery box is reduced. Moreover, the battery cell 22 between the two support plates 21 can be in sufficient contact with the support plates 21, so that the heat dissipation efficiency of the battery box is improved.

The heat exchange flow channels may be arranged in the support plate 21 in various ways. For example, the heat exchange flow channels are arranged so as to extend in a reciprocating and circuitous manner from the flow channel inlet to the flow channel outlet. As another example, the heat exchange flow channels include an inlet main flow channel 51, an outlet main flow channel 52, and a plurality of branch flow channels 53. The liquid inlet main channel 51 and the liquid outlet main channel 52 are communicated with each other through a plurality of branch channels 53. The heat-exchange liquid entering the liquid inlet main channel 51 flows through the branch channels 53 and then flows into the liquid outlet main channel 52, and then flows out of the support plate 21. The heat of the plurality of battery cells 22 distributed on the support plate 21 is taken away through the plurality of branch flow channels 53, which is beneficial to sufficient heat dissipation.

Further, the plurality of branch flow channels 53 are arranged in parallel, and the liquid inlet main flow channel 51 and the liquid outlet main flow channel 52 both extend along the arrangement direction of the plurality of branch flow channels 53. As shown in fig. 11, in an embodiment, the plurality of branch flow channels 53 are juxtaposed along the second direction of the support plate 21, and the liquid inlet main flow channel 51 and the liquid outlet main flow channel 52 extend along the second direction of the support plate 21. Thus, the coolant in the main liquid inlet channel 51 can be uniformly distributed to the branch channels 53, which is beneficial to improving the cooling efficiency.

It should be noted that a heating liquid may also be introduced into the heat exchange flow channel to heat the battery cell 22 on the support plate 21, and the working temperature of the battery box is adjusted by the heat exchange liquid, so that the battery box works in the optimal temperature range. When the outside air temperature is low, the heating liquid is introduced into the heat exchange flow channel to preheat the battery cell 22, so that the vehicle can be started conveniently.

As shown in fig. 2, in the embodiment of the present invention, the battery module 2 further includes at least one carrier bracket 23. The support frame 23 is connected to the support plate 21, and the plurality of battery cells 22 are disposed on the plurality of support frames 23. With the support plate 21 standing vertically, the cells 22 can be carried on a carrier support 23.

One side of the supporting bracket 23 is connected to the supporting plate 21, and the other side extends away from the supporting plate 21 to form a supporting platform on the supporting plate 21, where the supporting platform is used to support the battery cell 22. The carrier bracket 23 may be disposed on the support plate 21 by means not limited to welding or integral molding.

Specifically, a bearing surface is arranged on the bearing support 23, and the battery cell 22 is connected with the bearing surface. In the case of a vertical placement of the support plate 21, the cells 22 can be supported on this support surface. Optionally, the plate surface of the supporting plate 21 is perpendicular to the bearing surface, so that the bearing surface can be in a horizontal state when the supporting plate 21 is vertically placed.

Optionally, one end of the battery cell 22 is provided with a positive electrode tab and a negative electrode tab, and one end of the battery cell 22 away from the positive electrode tab is connected to the bearing support 23, so that when the battery cell 22 is borne on the bearing support 23, the positive electrode tab and the negative electrode tab are in an upward state, which is convenient for wiring of the battery box.

Further, the plurality of supporting brackets 23 are arranged along the first direction of the supporting plate 21, and the plurality of battery cells 22 on each supporting bracket 23 are arranged along the second direction of the supporting plate 21. The first direction and the second direction are both parallel to the plate surface of the support plate 21. Wherein the first direction and the second direction are different directions parallel to the plate surface of the support plate 21.

As a specific example, the support plate 21 has a rectangular plate-like structure, the first direction is a width direction of the support plate 21, and the second direction is a length direction of the support plate 21. The plurality of battery cells 22 are arranged in a rectangular array on the side surface of the support plate 21. As shown in fig. 1, 4 support brackets 23 are arranged in parallel on one side of the

support plate

21, and 12 cells 22 are arranged on each support bracket 23.

Alternatively, the carrier bracket 23 is a strip-shaped plate-like member, one side of which in the longitudinal direction is connected to the support plate 21 and the other side of which in the longitudinal direction extends away from the support plate 21. The plurality of battery cells 22 are arranged in sequence along the length direction of the bearing support 23. That is, the length direction of the carrier bracket 23 is the same as the arrangement direction of the plurality of battery cells 22 thereon, and the second direction is the extending direction of the carrier bracket 23. In the case that the support plate 21 is vertically disposed and the battery cells 22 are carried on the carrying bracket 23, the first direction is the same as the height direction of the battery box.

Wherein, the end of the battery cell 22 departing from the positive and negative electrode tabs is fixedly bonded to the carrier bracket 23. And/or the side part of the battery cell 22 is fixedly bonded with the support plate 21. Specifically, when the battery cell 22 is disposed on the supporting bracket 23, one end of the battery cell facing away from the positive and negative electrode ears thereof contacts the supporting bracket 23, and one side of the battery cell contacts the supporting plate 21. The end of the cell 22 away from the positive and negative electrode tabs may be adhesively fixed to the carrier 23 by an adhesive, or one side of the cell 22 may be adhesively fixed to the support plate 21. In order to ensure that the battery cell 22 is reliably fixed, one end of the battery cell 22 away from the positive and negative electrode tabs may be adhesively fixed to the carrier bracket 23 and one side thereof may be adhesively fixed to the support plate 21. The battery core 22 and the support plate 21 are bonded and fixed through structural adhesive, so that the vibration and impact resistance of the battery box is improved. And a buffer damping piece can be arranged between two adjacent layers of the battery cells 22, so that the vibration resistance of the battery box is further improved.

It should be noted that the arrangement manner of the battery cells 22 on the carrier support 23 is not limited to the specific illustrated embodiment. For example, a clamping seat is arranged on the cell 22 bearing support 23, and the cell 22 is clamped on the bearing support 23. For another example, one side of the battery cell 22 is fixedly bonded to the support plate 21 or the carrier bracket 23; alternatively, one side of the battery cell 22 is fixedly bonded to the support plate 21, and the other adjacent side is fixedly bonded to the carrier bracket 23.

As shown in fig. 10, the battery case according to the embodiment of the present invention further includes a heating film 6. A heating film 6 is arranged between two adjacent battery modules 2, and/or a heating film 6 is arranged between two adjacent layers of battery cores 22 in the battery modules 2. The void portion between the heating film 6 and the battery cell 22 on at least one side thereof may be bonded by an adhesive not limited to a structural adhesive. The heating film 6 is used to heat the battery cell 22. When the temperature of the battery cell 22 is low due to low outside air temperature, the battery cell 22 is preheated through the heating film 6, and vehicle starting is facilitated.

It should be noted that fig. 10 only schematically illustrates an arrangement diagram of a row of battery cells 22 corresponding to two adjacent layers of battery cells 22. The cells 22 of the corresponding rows of the two adjacent layers of cells 22 may be connected in series.

Some embodiments of the present invention provide a battery box including at least one first battery module 201 and two second battery modules 202. The first battery module 201 is located between two second battery modules 202. A plurality of battery cells 22 are laid on both side surfaces of the first battery module 201, and a plurality of battery cells 22 of the second battery module 202 are laid on the side surface of the support plate 21 close to the first battery module 201.

Specifically, as shown in fig. 4 and 5, each of the first battery module 201 and the second battery module 202 includes one support plate 21. As shown in fig. 6, the battery cells 22 are respectively disposed on two sides of the support plate 21 of the first battery module 201. One side of the support plate 21 of the second battery module 202 is provided with the battery cells 22 and the other side is not provided with the battery cells 22. The plurality of first battery modules 201 are stacked between two second battery modules 202 and connected by the first connection member 1.

In the case where only one layer of the battery cells 22 is laid on the side surfaces of the support plates 21, two layers of the battery cells 22 are provided between every two adjacent support plates 21 in the battery box of the present embodiment, and the battery cells 22 do not exist on the outer side surfaces of the two outermost support plates 21 of the entire battery box. Optionally, a heating film 6 is disposed between two adjacent battery modules, and is used to heat the battery cells 22 located on both sides of the heating film 6.

The battery box provided by some embodiments of the present invention includes at least one third battery module 203, the number of the support plates 21 of the third battery module 203 is two, and a plurality of battery cells 22 are respectively laid on the side surfaces of the two support plates 21 of the third battery module 203, which are close to each other. The two support plates 21 of each third battery module 203 are connected by the second connection member 3.

Specifically, as shown in fig. 7, 8 and 9, the third battery module 203 includes two support plates 21, and a plurality of battery cells 22 are located between the two support plates 21 and respectively laid on the sides of the two support plates 21 that are close to each other. The plurality of third battery modules 203 are stacked and connected by the first connection member 1.

Mounting holes are formed in the corresponding positions of the two support plates 21 of the third battery module 203, and the second connecting member 3 penetrates through the mounting holes. The second connecting member 3 includes a bolt and a nut, for example. The two support plates 21 of the third battery module 203 are connected by a plurality of second connection members 3 distributed on the third battery module 203.

In the case where only one layer of the battery cells 22 is laid on the side surfaces of the support plates 21, two layers of the battery cells 22 are arranged between every two adjacent support plates 21 in the battery box of the present embodiment, and the battery cells 22 do not exist on the outer side surfaces of the two outermost support plates 21 of the entire battery box. Optionally, a heating film 6 is disposed between two adjacent layers of the battery cells 22 between two support plates 21 in the third battery module 203, and is used to heat the battery cells 22 located on both sides of the heating film 6.

Some embodiments of the present invention provide a battery box including at least one fourth battery module and two second battery modules 202. The fourth battery module includes a plurality of first battery modules 201 and a second connection member 3. The plurality of first battery modules 201 are connected by the second connection member 3. The fourth battery module is located between the two second battery modules 202. That is, a plurality of fourth battery modules are stacked between two second battery modules 202 and connected by the first connection member 1.

In the case where only one layer of the battery cells 22 is laid on the side surfaces of the support plates 21, two layers of the battery cells 22 are provided between every two adjacent support plates 21 in the battery box of the present embodiment, and the battery cells 22 do not exist on the outer side surfaces of the two outermost support plates 21 of the entire battery box.

Some embodiments of the present invention provide a battery box including at least one fifth battery module. The fifth battery module includes a plurality of third battery modules 203 and a second connection member 3. The plurality of third battery modules 203 are connected by the second connection member 3. A plurality of fifth battery modules are stacked and connected by a first connecting member 1.

In the case where only one layer of the battery cells 22 is laid on the side surfaces of the support plates 21, two layers of the battery cells 22 are arranged between every two adjacent support plates 21 in the battery box of the present embodiment, and the battery cells 22 do not exist on the outer side surfaces of the two outermost support plates 21 of the entire battery box.

In some embodiments of the present invention, the package member includes a plurality of sealing plates, the plurality of battery modules are stacked to form a battery assembly, and the plurality of sealing plates are wrapped around the side of the battery assembly and connected to the plurality of battery modules through the first connecting member 1. Taking the support plate 21 as a rectangular structure as a specific example, a plurality of battery modules are stacked to form a battery assembly having a cubic structure, and the package member is packaged outside the battery assembly.

The package may comprise four sealing plates, the cross-section of which is of a zig-zag configuration. Specifically, each sealing plate includes a horizontal plate portion and two vertical plate portions, which are connected to two sides of the horizontal plate portion, respectively. The sealing plate can adopt a sheet metal part structure, and has simple manufacturing process and lower cost.

Wherein the width of the lateral plate portion corresponds to the dimension of the battery pack in the direction perpendicular to the support plate 21. As shown in fig. 1 and 12, the four closure plates are a first closure plate 41, a second closure plate 42, a third closure plate 43 and a fourth closure plate 44. The first cover plate 41 and the second cover plate 42 are respectively enclosed on both sides of the battery assembly in the first direction of the support plate 21, and the third cover plate 43 and the fourth cover plate 44 are respectively enclosed on both sides of the battery assembly in the second direction of the support plate 21.

It should be noted that the shape of the sealing plate may be adaptively designed according to the shape of the battery module, and is not limited to the four sealing plates described in the above embodiments.

In the embodiment that the battery box comprises at least one first battery module 201 and two second battery modules 202, the embodiment that the battery box comprises at least one third battery module 203, the embodiment that the battery box comprises at least one fourth battery module and two second battery modules 202, and the embodiment that the battery box comprises at least one fifth battery module, the battery box can be sealed by wrapping the sealing plates on the side edges of the battery assembly without wrapping the whole outer surface of the battery assembly, so that the material cost of the packaging part is saved.

In some embodiments of the present invention, the support plates 21 of the plurality of battery modules are detachably coupled by the first coupling member 1. When the electric quantity demand changes, dismantle first connecting piece 1 earlier, rethread first connecting piece 1 connects a plurality of battery modules behind the increase and decrease battery module. After the battery modules are increased or decreased, only the seal plates need to be replaced. The sealing plate is usually a sheet metal part, and the structure and the manufacturing process are simple. Compared with the battery frame body with a complex structure which needs to be customized again after the standard battery pack is added or reduced in the prior art, the seal plate in the embodiment of the invention has lower cost, and the production cost of the battery box is reduced.

As shown in fig. 1, the first link 1 includes a link rod 11. The corresponding positions of the plurality of support plates 21 are provided with first mounting holes 211, and the connecting rods 11 penetrate through the corresponding first mounting holes 211 on the plurality of support plates 21.

Wherein, the number of the first connecting members 1 is plural, for example, the supporting plate 21 has a rectangular structure, and a plurality of battery modules can be connected by four first connecting members 1 distributed at four corners of the supporting plate 21.

Specifically, the first connecting member 1 further includes a locking member 12 cooperatively connected with the connecting rod 11. The locking member 12 and the connecting rod 11 may be screw-coupled. In a specific example, the connection rod 11 is a bolt, the locker 12 is a nut fitted to the bolt, and the plurality of battery modules are locked between the head of the bolt and the bolt. For another example, locking members 12 are connected to both ends of the connecting rod 11, and a plurality of battery modules are locked between the two locking members 12.

The sealing plates are provided with second mounting holes 401, the second mounting holes 401 of adjacent sealing plates correspond to each other, and the connecting pieces penetrating through the second mounting holes 401 can be connected with the adjacent sealing plates. Further, the second mounting holes 401 correspond to the first mounting holes 211 of the support plate 21, and the connecting rods 11 penetrating through the first mounting holes 211 also penetrate through the corresponding second mounting holes 401, so that the plurality of battery modules and the sealing plate are connected through the first connecting member 1.

Further, as shown in fig. 1, a sleeve 7 is disposed between every two adjacent battery modules, and the sleeve 7 is sleeved on the connecting rod 11. In the specific embodiment where the battery box includes at least one first battery module 201 and two second battery modules 202, and in the specific embodiment where the battery box includes at least one fourth battery module and two second battery modules 202, there is a battery cell 22 between two adjacent support plates 21 of two adjacent battery modules. By providing the sleeve 7 between adjacent battery modules, the gap between the two battery modules can be controlled, preventing the cell 22 located outside the battery modules from being damaged by pressure.

The embodiment of the invention also provides a vehicle which can be an electrically driven heavy truck, a pump truck, an excavator, a transport vehicle and the like. The vehicle comprises the battery box in any embodiment.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a battery box, its characterized in that includes first connecting piece and a plurality of battery module, battery module includes backup pad and electric core, it is a plurality of to have laid to at least one side of backup pad electric core, electric core connect in the backup pad, it is a plurality of battery module is keeping away from range upon range of setting in the planar direction in backup pad place and pass through first connecting piece is connected.

2. The battery box according to claim 1, wherein a heat exchange flow channel is provided in the support plate, the heat exchange flow channel comprises a liquid inlet main flow channel, a liquid outlet main flow channel and a plurality of branch flow channels, the branch flow channels are arranged in parallel, and the liquid inlet main flow channel and the liquid outlet main flow channel both extend along the arrangement direction of the branch flow channels.

3. The battery box of claim 1, wherein the battery module further comprises at least one carrying bracket, the carrying bracket is connected to the supporting plate, and a plurality of battery cells are disposed on the carrying brackets, so that the battery cells can be carried on the carrying brackets when the supporting plate is vertically placed.

4. The battery box according to claim 3, wherein one end of the battery cell is provided with a positive electrode tab and a negative electrode tab, and one end of the battery cell, which is away from the positive electrode tab and the negative electrode tab, is fixedly bonded to the carrier bracket; and/or the side part of the battery cell is fixedly bonded with the support plate.

5. The battery box of claim 1, wherein the battery box comprises at least one first battery module and two second battery modules, the first battery module is located between the two second battery modules, a plurality of the battery cells are laid on two sides of the first battery module, and a plurality of the battery cells of the second battery module are laid on a side of the support plate close to the first battery module.

6. The battery box of claim 1, wherein the battery box comprises at least one third battery module, the number of the support plates of the third battery module is two, a plurality of battery cells are laid on the side surfaces, close to each other, of the two support plates of the third battery module, and the two support plates of each third battery module are connected through a second connecting member.

7. The battery box according to any one of claims 1 to 6, further comprising an enclosing member, wherein the enclosing member comprises a plurality of cover plates, the plurality of battery modules are stacked to form a battery assembly, and the plurality of cover plates are wrapped around the side edge of the battery assembly and connected to the plurality of battery modules through the first connecting member.

8. The battery box according to any one of claims 1 to 6, wherein the support plates of a plurality of the battery modules are detachably connected by the first connecting member; the first connecting piece comprises a connecting rod, first mounting holes are formed in positions corresponding to the support plates, and the connecting rod penetrates through the corresponding first mounting holes in the support plates; and a sleeve is arranged between every two adjacent battery modules and sleeved on the connecting rod.

9. The battery box according to any one of claims 1 to 6, wherein the battery box further comprises a heating film, the heating film is arranged between two adjacent battery modules, and/or the heating film is arranged between two adjacent layers of battery cells in the battery modules.

10. A vehicle characterized by comprising a battery box according to any one of claims 1 to 9.