WO2021008498A1

WO2021008498A1 - Battery module, battery pack, and vehicle

Info

Publication number: WO2021008498A1
Application number: PCT/CN2020/101710
Authority: WO
Inventors: 赵继阳; 占莉; 潘福中; 李伟
Original assignee: 威睿电动汽车技术(宁波)有限公司; 吉利汽车研究院（宁波）有限公司; 浙江吉利控股集团有限公司
Priority date: 2019-07-16
Filing date: 2020-07-13
Publication date: 2021-01-21

Abstract

Disclosed are a battery module, a battery pack, and a vehicle. The battery module comprises a first end plate and a second end plate disposed opposite to each other, a first side plate and a second side plate disposed opposite to each other, and a battery group. The first end plate, the first side plate, the second end plate, and the second side plate are sequentially connected to form an accommodating space. The battery group is disposed in the accommodating space. A battery protection structure is provided on the upper surface of the battery group. The battery pack comprises a plurality of stacked battery modules and fixed by a reinforcing assembly. The battery modules themselves achieve a support function, without providing an additional support member, and multi-layer module stacking can be implemented. The battery pack has a simple structure. In a limited high-altitude space, the module gap is small, and no additional support is required, thereby reducing material costs and assembly costs. In addition, the level of integration of power is high, thereby facilitating the improvement of energy density.

Description

Battery module, battery pack and vehicle

Technical field

The invention relates to the technical field of new energy, in particular to a battery module, a battery pack and a vehicle.

Background technique

The battery pack is a component that provides energy for new energy vehicles, and the development of battery technology is an important boost for the development of new energy vehicles.

As the main component of the battery pack, battery modules are generally implemented in three forms: "stacking", "tiling" and "tiling + stacking". Among them, as shown in Figure 7 and Figure 8, the "stacking" method is adopted, and the battery module needs additional support components, which has disadvantages such as volume and cost, and the support has a greater impact on the height; as shown in Figure 9, the use of " The “tiling” method has a high utilization rate in the plane direction and relatively neat layout, but the space utilization rate in the height direction is low. It is only suitable for application and implementation under the condition of wide chassis space; the “tiling + stacking” method is compared with the above two This solution has further improved the space utilization rate, but the number of battery modules in the upper space is lower than the number of the bottom layer, resulting in limited battery pack energy, and the supporting structure is complicated, and there are hidden dangers in the structure and material properties. Materials and layout space are limited, and the number of stacking layers in conventional layout methods is limited (generally no more than two layers), which results in low battery pack power, which is very limited in vehicle layout applications.

Summary of the invention

In view of the above-mentioned problems in the prior art, the purpose of the present invention is to provide a battery module, a battery pack, and a vehicle, which can realize high-volume energy stacking of the battery pack while taking into account the high requirements on the mechanical performance of the battery pack.

In order to solve the above technical problems, the specific technical solutions of the present invention are as follows:

In one aspect, the present invention provides a battery module, which includes a first end plate and a second end plate that are arranged oppositely, a first side plate and a second side plate that are arranged oppositely, a battery pack, and a battery protection structure; The end plate, the first side plate, the second end plate, and the second side plate are sequentially connected to form an accommodating space, the battery pack is disposed in the accommodating space, and the battery protection structure is disposed The upper surface of the battery pack is used to protect the battery pack.

Further, the battery pack includes a plurality of battery units, and the plurality of battery units are stacked and connected in sequence.

Further, the battery module further includes at least one middle end plate, and the middle end plate is arranged between the battery cells.

Further, a supporting structure is provided on the middle end plate, and the supporting structure is arranged on both sides of the upper surface of the middle end plate.

Further, the first end plate and the second end plate are both provided with support structures, and the support structures are arranged on both sides of the upper surface of the first end plate and the second end plate.

Optionally, the supporting structure is a convex structure.

Further, the first side plate includes a first flange and a second flange, the first flange is fixed to one end of the first end plate, and the second flange is fixed to the second end One end of the board; and/or,

The second side plate includes a third flange and a fourth flange, the third flange is fixed to the other end of the first end plate, and the fourth flange is fixed to the second end plate. another side.

Optionally, the first end plate, the second end plate and the intermediate end plate are all aluminum alloys.

Further, the battery protection structure includes a module support plate and a module insulation plate; the module support plate is arranged on the upper surface of the battery pack and is used to bear the longitudinal pressure of the battery pack. The insulating plate is arranged on the module support plate and is used to realize the insulation of the upper surface of the battery pack.

Further, the module support plate is provided with a boss, the module insulating plate is provided with an opening, and the boss corresponds to the opening.

Further, the battery module further includes a module bottom plate disposed at the bottom of the battery pack, the module bottom plate includes a plurality of limit pits, and the position of the limit pits is consistent with the opening The position of the hole corresponds.

Preferably, the portion of the boss that passes through the opening matches the limiting pit.

In a second aspect, the present invention also provides a battery pack, which includes:

At least two of the aforementioned battery modules and reinforcement components;

The battery modules are stacked one after another, and the reinforcing component is used to fix the battery modules.

Further, the reinforcing component includes at least one set of reinforcing plates;

The reinforcing plate includes a first reinforcing plate and a second reinforcing plate;

The first reinforcing plate and the second reinforcing plate are respectively arranged on two non-adjacent side walls of the battery pack; or,

The first reinforcing plate and the second reinforcing plate are respectively arranged on two adjacent side walls of the battery pack.

Further, the first reinforcing plate and the second reinforcing plate respectively disposed on two adjacent side walls of the battery pack are butted to form a encapsulation structure with a preset angle.

Preferably, the preset angle includes a right angle.

Preferably, the length of the first reinforcement plate and the second reinforcement plate does not exceed the height of the battery pack.

Further, the reinforcing plate further includes at least one set of reinforcing ribs;

The reinforcing ribs are used to connect adjacent battery modules.

Optionally, the reinforcing plate and the battery pack are fixed by welding or connected by bolts.

In a third aspect, the present invention also provides a vehicle, the vehicle is a pure electric vehicle or a hybrid electric vehicle, and the vehicle includes the aforementioned battery pack.

By adopting the above technical solution, the battery module, battery pack and vehicle of the present invention have the following beneficial effects:

1. In the battery module, battery pack and vehicle of the present invention, the battery module itself realizes the supporting function without additional support members, and can realize multi-layer module stacking.

2. The battery module, battery pack and vehicle according to the present invention have a simple battery pack structure, small module gaps in a limited high-altitude space, no need for additional brackets, and reduced material costs and assembly costs.

3. In the battery module, battery pack and vehicle of the present invention, each battery module of the battery pack has the same structure and high level of power integration, which helps to improve energy density.

4. The battery module, battery pack and vehicle according to the present invention limit and fix the stacked modules to avoid mutual sliding between the modules and improve the structural stability. At the same time, the module support plate is installed to increase The load carrying capacity of the modules after stacking is improved.

Description of the drawings

In order to explain the technical solution of the present invention more clearly, the following will briefly introduce the drawings used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

Fig. 1 is a schematic diagram of the structure of the battery module of the present invention;

2 is a schematic structural diagram of the battery protection structure in the battery module of the present invention;

FIG. 3 is a schematic diagram of the battery pack structure according to an embodiment of this specification;

Fig. 4 is a schematic structural diagram of a reinforcing component according to an embodiment of this specification;

Figure 5 is a schematic diagram of the structure of the reinforcing component in Figure 4;

Fig. 6 is a schematic structural diagram of a reinforcing component according to an embodiment of this specification;

Fig. 7 is a schematic diagram of a "stacked" structure of a battery pack in the prior art;

FIG. 8 is a schematic diagram of a "stacked" structure of a battery pack in the prior art;

Fig. 9 is a schematic diagram of the “tiled” structure of the battery pack in the prior art.

In the picture: 1-end plate assembly, 2-side plate assembly, 3-battery pack, 4-module support plate, 5-module insulating plate, 6-module bottom plate, 7-reinforced component, 11-first end Plate, 12-second end plate, 13-middle end plate, 14-support structure, 21-first side plate, 22-second side plate, 31-battery unit, 41-boss, 51-opening, 61 -Limiting pit, 71-first reinforcing plate, 72-second reinforcing plate, 73-reinforcing rib, 211-first flange, 212-second flange, 221-third flange, 222-fourth flange side.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

It should be noted that the terms "first" and "second" in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and not necessarily used to describe a specific sequence or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations of them are intended to cover non-exclusive inclusions. For example, a process, method, device, product, or device that includes a series of steps or units is not necessarily limited to the clearly listed Those steps or units may include other steps or units that are not clearly listed or are inherent to these processes, methods, products, or equipment.

Example 1

In view of the problem that the battery pack structure in the prior art has low battery pack power due to structure, layout, etc., and the application of the whole vehicle layout is limited, the embodiment of this specification provides a battery module and a battery using the battery module package.

Specifically, as shown in FIG. 1, it is a schematic structural diagram of a battery module provided in an embodiment of this specification;

The battery module includes an end plate assembly 1, a side plate assembly 2 and a battery pack 3. The end plate assembly 1 includes a first end plate 11 and a second end plate 12 arranged opposite to each other. The side plate assembly 2 includes opposite The first side plate 21 and the second side plate 22 are provided, wherein the first end plate 11, the first side plate 21, the second end plate 12 and the second side plate 22 are connected in sequence to form The accommodating space, the battery pack 3 is arranged in the accommodating space, thus forming the overall structure of the battery module.

In the embodiment of this specification, the battery pack 3 may include a plurality of battery units 31, which are stacked and connected in sequence, which can increase the electric energy density and increase the storage of electricity. The number of the battery units 31 depends on the specific vehicle. The structure and energy requirements are set, which are not limited here.

In order to ensure the continuous and effective output of battery energy, a plurality of the battery cells 31 are connected in series or in parallel, so that the electric energy can be easily controlled. For example, when a plurality of the battery cells 31 are arranged in series, an electric energy output port can be set , The stable output of electric energy can be controlled by the battery management system, and the energy of each battery unit 31 is evenly consumed, avoiding excessive consumption of a single battery unit 31 and affecting the quality of the battery unit; when multiple battery units 31 are arranged in parallel, each Each battery unit 31 can be used as the output unit of the unit to output electric energy, so that the energy of each battery unit 31 can be fully consumed and utilized, and the energy output of the entire battery module can be increased.

It should be noted that the connection mode of the battery power source 31 in the battery module is selected according to different output strategies, which is not limited in the embodiment of this specification.

Since multiple battery cells 31 are connected in sequence, a certain degree of squeezing will occur. When the stress between adjacent battery cells 31 is too large, the structure of the battery cells 31 will be damaged, and the storage effect of the battery cells will be damaged. An intermediate end plate 13 is arranged between the battery cells 31, which can reduce excessive squeezing between the battery cells 31, thereby protecting the battery power supply. Alternatively, an intermediate end plate 13 can be arranged to be arranged in a plurality of In the middle of the battery cell 31, in some other embodiments, in order to further protect the battery cell 31, a plurality of middle end plates 13 may also be provided, and the specific positions of the middle end plates 13 are not described here.

It should be noted that the intermediate end plate 13 may be the same as the first end plate 11 or the second end plate 12, that is, the first end plate 11, the intermediate end plate 13 and the second end plate 12 are arranged in sequence, and the interval A storage space is formed in the middle, and the battery unit 31 is arranged in the storage space. In this way, in the laminated battery pack structure, the middle end plate 13 can also play a role in supporting the upper battery module. In some other implementations, In an example, the size of the middle end plate 13 may be smaller than the size of the first end plate 11 or the second end plate 12, so that the middle end plate 13 only functions to isolate and support the battery unit 31. The material of the first end plate 11, the second end plate 12, and the intermediate end plate 13 may be aluminum alloy, and of course it is not limited to other materials.

In the embodiment of this specification, a supporting structure 14 is also provided on the upper surface of the first end plate 11 and the second end plate 12. Specifically, the supporting structure 14 is provided on the first end plate 11 On both sides of the upper surface of the second end plate 12, the supporting structures 14 are protruding from the upper surface of the battery module. This is to ensure that the lower battery module supports the battery module when the battery modules are stacked. The structure 14 is in contact with the end plate or side plate of the battery module of the upper layer, and the supporting structure 14 can carry the weight of the upper battery module, while the upper battery module cannot squeeze the lower battery module to realize load-bearing stacking. .

In some other embodiments, when the size of the middle end plate 13 is the same as that of the first end plate 11 or the second end plate 12, a supporting structure 14 may be provided on the upper surface of the middle end plate 13, specifically Ground, the supporting structure 14 is provided on both sides of the upper surface of the middle end plate 13. As a preference, the supporting structure 14 may be but not limited to a convex structure. In some embodiments, the first The upper surface of the side plate 21 and the second side plate 22 are also provided with supporting structures (not shown in the figure). In some embodiments, multiple protrusion structures are provided on the end points and the long axis of the upper surface of the battery module, for example, multiple protrusion structures are provided on the first end plate 11 and/or the second end plate 12. For another example, a plurality of protrusion structures are provided on the first side plate 21 and/or the second end plate 22.

The connection between the first end plate 11, the first side plate 21, the second end plate 12 and the second side plate 22 may be fixed by welding, which may be electric welding, surface welding, etc., Other connection methods may be included, which will not be repeated here. In order to improve the stability of the connection, a first flange 211 and a second flange 212 may be provided at both ends of the first side plate 21. A flange 211 is fixed to one end of the first end plate 11, the second flange 212 is fixed to one end of the second end plate 12, wherein the first flange 211 and the second flange 212 is configured as a right angle, so that the first flange 211 can completely fit the first end plate 11, and the second flange 212 can completely fit the second end plate 12, so that Improve the strength of its connection.

Correspondingly, a third flange 221 and a fourth flange 222 may also be provided at both ends of the second side plate 22, and the third flange 221 is fixed to the other end of the first end plate 11. The fourth flange 222 is fixed to the other end of the second end plate 12, wherein the third flange 221 and the fourth flange 222 are arranged at right angles, so that the third flange 221 can When the first end plate 11 is completely adhered, the fourth flange 222 can be completely adhered to the second end plate 12, so that the strength of the connection can be improved.

It should be noted that, in some other embodiments, the first flange 211 and the third flange 221 are arranged on the outer side of the first end plate 11, and the second flange 212 and the first flange The four flanges 222 are arranged on the outside of the second end plate 12, and the lengths of the first side plate 21 and the second side plate 22 are slightly smaller than the first end plate 11 and the second end plate In this way, the first end plate 11 and the second end plate 12 can be well fixed by flanging.

Since the upper surface of the battery unit 31 serves as the output terminal and input terminal of electric energy, in actual work, when multiple battery modules are stacked, the lower battery module, especially the bottom battery module, will bear a greater upper pressure, so In the prior art, too many battery modules will not be stacked to avoid excessive pressure on the lower battery modules. In the embodiment of this specification, as shown in FIG. 2, it can be placed on the upper surface of the battery pack 3. A battery protection structure is provided. The battery protection structure can be used to carry weight in the longitudinal direction of the battery pack 3 and can also function as an insulation protection. Specifically, the battery protection structure can include a module support plate 4 and a module Insulation board 5.

The module support plate 4 is arranged on the upper surface of the battery pack 3 for bearing the longitudinal pressure of the battery pack 3, and the module insulating plate 5 is arranged on the module support plate 4, In order to realize the insulation of the upper surface of the battery pack 3; specifically, the size of the module support plate 4 and the module insulating plate 5 are equal, and both have the same size as the upper surface of the battery pack 3.

In order to ensure the stability of the connection between the module supporting plate 4 and the module insulating plate 5, a boss 41 may be provided on the module supporting plate 4, and an opening is provided on the module insulating plate 5. Hole 51. The boss 41 corresponds to the opening 51, so that when the module support plate 4 and the module insulating plate 5 are attached, they pass through the opening 51 and the boss 41 The cooperation of the two can stabilize the two together. Specifically, in order to fit the boss 41, the size of the opening 51 should be slightly larger than the size of the boss 41 on the upper surface of the module support plate 4, so as to ensure that the boss 41 can pass through completely The opening 51 also requires the height of the boss 41 to be higher than the upper surface of the module insulating board 5.

Optionally, the cross section of the boss 11 is circular, rectangular, or the like.

In order to protect the bottom of the battery module, a module bottom plate 6 may also be provided. The module bottom plate 6 is provided at the bottom of the battery pack 3. Alternatively, the module bottom plate 6 may include a plurality of limit stops. Hole 61, the position of the limiting pit 61 corresponds to the position of the opening 51. Specifically, the portion of the boss 41 passing through the opening 51 matches the limiting pit 61.

In the embodiment of this specification, the module insulating plate 5 can be made of thin-walled non-metallic materials, and the module support plate 4 can be selected from plastic materials, hard plastics, etc., which can not only support the upper battery module, but also When it is subjected to upper pressure, it can buffer the leakage force and reduce the damage to the battery module.

It should be noted that the bonding height of the module supporting plate 4 and the module insulating plate 5 does not exceed the height of the supporting structure 14. Preferably, the module supporting plate 4 and the module The bonding height of the insulating plate 5 is the same as the height of the supporting structure 14. When the battery modules are stacked, the contact area of the contact surface can be maximized, the weight of the upper battery module can be dispersed, and the longitudinal stability is improved. In some embodiments, the first end plate 11 and/or the second end plate 12 are not provided with a support structure 14. When at least two battery modules are stacked, the module support plate 4 in the lower battery module The boss 41 and the limiting pit 61 of the module bottom plate 6 in the upper battery module cooperate to fix the at least two battery modules. Specifically, the battery modules in the battery pack can be prevented from laterally shifting.

In some other embodiments, a plurality of positioning buckles are provided on the upper surface of the module support plate 4. Correspondingly, the positioning buckles can pass through the openings of the module insulating plate 5, and at the same time The module bottom plate 6 also needs to be provided with a card slot for use with the buckle. When the battery pack is assembled, the two battery modules need to be stacked. The positioning buckle and the upper layer of the module upper cover in the lower battery module The card slots of the module bottom plate in the battery module are engaged with each other, so that the battery modules on the upper and lower sides are more stable and not prone to lateral displacement.

In the embodiment of this specification, the middle end plate 13 is provided to improve the lateral compression resistance of the battery module, that is, the compression between the battery cells 31 is relieved; by setting the battery protection structure on the upper surface of the battery pack 3, This makes the battery module also has the ability to withstand compression, the structural strength is high, and the safety is strong in the event of an accident, which improves the load-bearing capacity of the battery module after stacking, and improves the safety brought by the battery module stacking Problem, improve the efficiency of use.

On the basis of the battery module provided above, an embodiment of the present specification also provides a battery pack, the battery pack including a plurality of battery modules arranged in a stack.

Specifically, as shown in FIG. 3, which is a schematic diagram of the structure of the battery pack in the embodiment of this specification, it may include three layers of battery modules, namely a lower battery module a, a middle battery module b, and a lower battery module c. In some other embodiments, it may also be a double-layer battery module or a battery module with more than three layers.

In the embodiment of this specification, the battery pack may also be provided with a reinforcing component 7 for fixing stacked battery modules.

The reinforcement assembly 7 includes at least one set of reinforcement plates; the reinforcement plates include a first reinforcement plate 71 and a second reinforcement plate 72; the first reinforcement plate 71 and the second reinforcement plate 72 are respectively disposed on the Two non-adjacent side walls of the battery pack; or, the first reinforcement plate 71 and the second reinforcement plate 72 are respectively disposed on two adjacent side walls of the battery pack.

In the embodiment of this specification, the reinforcement assembly 7 may include two sets of reinforcement plates, as shown in FIGS. 4 and 5, wherein a set of reinforcement plates is an independent reinforcement plate, and the length of the independent reinforcement plate is equal to that of the battery The height of the package is set on the side wall of the battery package; the other set of reinforcement plates is composed of a first reinforcement plate 71 and a second reinforcement plate 72, and the length of the first reinforcement plate 71 and the second reinforcement plate 72 is equal to that of the battery package The height of the first reinforcement plate 71 and the second reinforcement plate 72 are respectively arranged on two adjacent side walls of the battery pack. As a further embodiment, the first reinforcing plate 71 and the second reinforcing plate 72 are butt-connected to form a right-angle edging structure, which is wrapped around the side of the battery pack, which can realize the function of strengthening and fastening the battery module. It should be noted that when the edge angles of the battery pack are set at other non-right angles, the edge angles of the first reinforcement plate 71 and the second reinforcement plate 72 may also be set at non-right angles.

In some other embodiments, the reinforcing component may also be two groups of reinforcing plates, as shown in FIG. 6, where one group of reinforcing plates is a first reinforcing plate 71 and a second reinforcing plate 72, and the first reinforcing plate The lengths of 71 and the second reinforcing plate 72 are equal to the height of the battery pack and are arranged on the side wall of the battery pack; the other group of reinforcing plates includes at least one reinforcing rib 73, the length of which is less than the height of the battery module, Two adjacent battery modules are connected and fixed at the sidewalls. Further, when battery modules larger than three layers are stacked, the length of the reinforcing rib 73 can also be greater than the height of a single battery module, so that The side walls of three consecutive battery modules are connected and fixed.

It should be noted that the specific structure and number of the reinforcement components are not particularly limited. They can be multiple reinforcement plates of a single structure, or a combination of reinforcement plates of different structures, as long as they can achieve the purpose of fixing battery modules and strengthening The purpose of the overall structural strength of the battery pack is sufficient.

In the embodiment of the present specification, the reinforcing plate and the battery pack are connected by welding or fixedly connected by bolts.

It should be noted that the connection method between the reinforcing plate and the battery pack is not particularly limited. It can be screw connection or welding as described above, or other connection methods, as long as it can fix the battery module and enhance the overall battery system. The purpose of structural strength is sufficient.

On the basis of the battery pack provided above, an embodiment of this specification also provides a vehicle. The vehicle may be a pure electric vehicle or a hybrid electric vehicle, and the vehicle can be equipped with the battery pack provided above.

The battery module, battery pack, and vehicle provided in the embodiments of this specification can achieve the following beneficial effects:

1) In the battery module, battery pack, and vehicle of the present invention, the battery module itself realizes the supporting function without additional support members, and can realize multi-layer module stacking.

2) The battery module, the battery pack and the vehicle according to the present invention have a simple structure of the battery pack, in a limited high-altitude space, the module gap is small, no additional brackets are needed, and the material cost and assembly cost are reduced.

3) A battery module, a battery pack and a vehicle according to the present invention, each battery module of the battery pack has the same structure and high power integration, which helps to improve energy density.

4) In the battery module, battery pack and vehicle of the present invention, the stacked modules are restricted and fixed to avoid mutual sliding between the modules and improve the structural stability. At the same time, the module support plate is installed to increase The load carrying capacity of the modules after stacking is improved.

The foregoing descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and does not deviate from the spirit or spirit of the present invention. In the case of basic features, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description, and therefore it is intended to fall within the claims. All changes within the meaning and scope of the equivalent elements of are included in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

In addition, it should be understood that although this specification is described in accordance with the implementation manners, not each implementation manner only contains an independent technical solution. This narration in the specification is only for clarity, and those skilled in the art should regard the specification as a whole The technical solutions in each embodiment can also be appropriately combined to form other implementations that can be understood by those skilled in the art.

Claims

A battery module, characterized in that it comprises a first end plate (11) and a second end plate (12) arranged oppositely, a first side plate (21) and a second side plate (22) arranged oppositely, and a battery Group (3); the first end plate (11), the first side plate (21), the second end plate (12), and the second side plate (22) are connected in sequence to form an accommodation The battery pack (3) is arranged in the accommodating space.
The battery module according to claim 1, wherein the battery pack (3) comprises a plurality of battery cells (31), and the plurality of battery cells (31) are stacked and connected in sequence.
The battery module according to claim 1, further comprising at least one middle end plate (13), and the middle end plate (13) is arranged between the battery cells (31).
The battery module according to claim 3, characterized in that a supporting structure (14) is provided on the middle end plate (13), and the supporting structure (14) is arranged on the middle end plate (13) Both sides of the surface.
The battery module according to claim 1, wherein the first end plate (11) and the second end plate (12) are both provided with a supporting structure (14), and the supporting structure (14) Are arranged on both sides of the upper surface of the first end plate (11) and the second end plate (12).
The battery module according to claim 4 or 5, wherein the supporting structure (14) is a convex structure.
The battery module according to claim 1, wherein the first side plate (21) comprises a first flange (211) and a second flange (212), and the first flange (211) Fixed to one end of the first end plate (11), and the second flange (212) is fixed to one end of the second end plate (12); and/or,

The second side plate (22) includes a third flange (221) and a fourth flange (222), the third flange (221) is fixed to the other end of the first end plate (12), The fourth flange (222) is fixed on the other end of the second end plate (12).
The battery module according to claim 3, wherein the first end plate (11), the second end plate (12) and the intermediate end plate (13) are all aluminum alloys.
The battery module according to claim 1, further comprising a battery protection structure, the battery protection structure is arranged on the upper surface of the battery pack (3), and the battery protection structure comprises a module support plate ( 4) And module insulation board (5);

The module support plate (4) is arranged on the upper surface of the battery pack (3) for bearing the longitudinal pressure of the battery pack (3),

The module insulating plate (5) is arranged on the module supporting plate (4), and is used to realize the insulation of the upper surface of the battery pack (3).
The battery module according to claim 9, characterized in that a boss (41) is provided on the module support plate (4), and an opening (51) is provided on the module insulating plate (5) , The boss (41) corresponds to the opening (51).
The battery module according to claim 10, further comprising a module bottom plate (6), the module bottom plate (6) is arranged at the bottom of the battery pack (3), the module bottom plate (6) ) Includes a plurality of limit pits (61), and the position of the limit pits (61) corresponds to the position of the opening (51).
The battery module according to claim 11, characterized in that the part of the boss (41) passing through the opening (51) is matched with the limiting pit (61).
A battery pack, characterized in that the battery pack includes:

At least two battery modules according to any one of claims 1 to 12; each of the battery modules includes a module support plate and a module bottom plate, the module support plate is provided with a boss, and the mold The group bottom plate is provided with a limit pit;

The battery modules are arranged one by one, and the boss on the module support plate in the lower battery module cooperates with the limiting hole on the module bottom plate in the upper battery module to fix at least two of the batteries Module.
A battery pack, characterized in that the battery pack includes:

At least two battery modules and reinforcement components (7) according to any one of claims 1 to 12;

The battery modules are arranged in stacks one after another, and the reinforcing component (7) is used for fixing at least two of the battery modules.
The battery pack according to claim 14, wherein the reinforcing component (7) comprises at least one set of reinforcing plates;

The reinforcing plate includes a first reinforcing plate (71) and a second reinforcing plate (72);

The first reinforcing plate (71) and the second reinforcing plate (72) are respectively arranged on two non-adjacent side walls of the battery pack; or,

The first reinforcing plate (71) and the second reinforcing plate (72) are respectively arranged on two adjacent side walls of the battery pack.
The battery pack according to claim 15, characterized in that the first reinforcement plate (71) and the second reinforcement plate (72) respectively provided on two adjacent side walls of the battery pack are formed by butting Hemming structure with preset angle.
The battery pack according to claim 16, wherein the predetermined angle includes a right angle.
The battery pack according to claim 15, wherein the length of the first reinforcement plate (71) and the second reinforcement plate (72) does not exceed the height of the battery pack.
The battery pack according to claim 15, wherein the reinforcing plate further comprises at least one set of reinforcing ribs (73);

The reinforcing ribs (73) are used to connect adjacent battery modules.
The battery pack according to claim 15, wherein the reinforcing plate is fixed to the battery pack by welding or connected by bolts.
A vehicle, the vehicle being a pure electric vehicle or a hybrid electric vehicle, characterized in that the vehicle includes the battery pack according to any one of claims 13 to 20.