CN221262551U - Battery module, battery and power consumption device - Google Patents

Abstract

The application discloses a battery module, a battery and an electric device. The battery module comprises a battery pack, a side plate and a connecting plate, wherein the battery pack comprises a first battery sub-group and a second battery sub-group, and the first battery sub-group and the second battery sub-group respectively comprise a plurality of battery monomers; the two side plates are respectively arranged at two opposite sides of the battery pack along the first direction, and heat exchange flow channels for heat exchange medium to flow are arranged in the side plates; two ends of the connecting plate are respectively connected with the two side plates, and the connecting plate is arranged between the first battery sub-group and the second battery sub-group. The application saves the space inside the battery, thereby improving the energy density of the battery.

Description

Battery module, battery and power consumption device

Technical Field

The present application relates to the field of battery technology, and more particularly, to a battery module, a battery, and an electric device.

Background

Currently, the application of power batteries is more widespread from the development of market situation. The power battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and the like, and a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the application field of the power battery, the market demand of the power battery is also continuously expanding.

In the development of battery technology, how to increase the energy density of a battery is an important research direction in battery technology.

Disclosure of utility model

The application provides a battery module, a battery and an electric device, which can improve the energy density of the battery.

In a first aspect, an embodiment of the present application provides a battery module, where the battery module includes a battery pack, a side plate, and a connection plate, the battery pack includes a first battery sub-group and a second battery sub-group, and the first battery sub-group and the second battery sub-group include a plurality of battery cells, respectively; the two side plates are respectively arranged at two opposite sides of the battery pack along the first direction, and heat exchange flow channels for heat exchange medium to flow are arranged in the side plates; two ends of the connecting plate are respectively connected with the two side plates, and the connecting plate is arranged between the first battery sub-group and the second battery sub-group.

In the scheme, the side plates are reused as the heat exchange plates, so that the heat exchange plates at the top are omitted, the space inside the battery is saved, and the energy density of the battery can be improved. And still be provided with the connecting plate between first battery subgroup and second battery subgroup, the connecting plate is connected with two curb plates respectively, has improved battery module's bulk strength.

In some embodiments, the battery module further comprises two end plates respectively arranged at two opposite sides of the battery pack along the second direction, and two ends of each end plate are respectively connected with the two side plates; the first direction and the second direction are arranged in a crossing mode.

In the scheme, the side plates and the end plates are respectively arranged on two sides of the battery pack in different directions, so that the battery pack is fixed, and the overall strength of the battery module is further improved.

In some embodiments, the first battery subgroup and the second battery subgroup are arranged in sequence along the second direction.

In the scheme, the arrangement direction of the first battery sub-group and the second battery sub-group is different from the arrangement direction of the side plate, so that the side plate can exchange heat to the first battery sub-group and the second battery sub-group at the same time, and the heat exchange efficiency is improved.

In some embodiments, the battery module further includes a bottom plate disposed at one side of the battery pack in a third direction, the third direction being disposed to intersect the first direction and the second direction, respectively, and the bottom plate being fixed to the end plate.

In the scheme, the side plates, the end plates and the bottom plate are respectively arranged on two sides of the battery pack in different directions, so that the battery pack is fixed, and the overall strength of the battery module is further improved.

In some embodiments, the interior of the connection plate is a hollow structure.

In the scheme, the inside of the connecting plate is of a hollow structure, so that the acting force of expansion generated by the battery monomer during working can be absorbed.

In some embodiments, the first reinforcing ribs are arranged inside the connecting plate, so that the strength of the connecting plate is improved, and the supporting strength of the connecting plate to the battery cells is enhanced.

In some embodiments, the inner part of the connecting plate is further provided with second reinforcing ribs, and the first reinforcing ribs and the second reinforcing ribs are respectively arranged in a crossing way.

In the scheme, the strength of the connecting plate is further improved by arranging the first reinforcing ribs and the second reinforcing ribs in different directions in the connecting plate.

In some embodiments, the battery module further includes a fastening band disposed along a circumferential direction of the battery pack.

In the scheme, the battery pack is bound through the fastening belt, so that the overall strength of the battery module is further improved.

In some embodiments, the side panel includes a panel body and an outer flange; the outer protruding portion is protruding the setting from the tip of curb plate to the direction of keeping away from the group battery, forms the holding tank between outer protruding portion and the group battery, and the part of fastening area sets up in the holding tank.

In the scheme, the fastening belt is arranged in the side plate, so that the problem of poor welding between the side plate and the battery cell can be solved.

In a second aspect, an embodiment of the present application further provides a battery, including a battery box and a battery module of any one of the foregoing embodiments, where the battery module is disposed in the battery box.

In a third aspect, an embodiment of the present application further provides an electrical device, including the above battery, where the battery is used to provide electrical energy.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and other drawings may be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic illustration of a vehicle according to some embodiments of the present application;

Fig. 2 is an exploded view of a battery according to some embodiments of the present application;

fig. 3 is a schematic structural view of a battery module according to some embodiments of the present application;

Fig. 4 is an exploded view of a battery module according to some embodiments of the present application;

FIG. 5 is a schematic structural view of a connection board according to some embodiments of the present application;

Fig. 6 is an exploded view of a battery module according to other embodiments of the present application;

Fig. 7 is an enlarged schematic view of a portion a in fig. 3.

In the drawings, the drawings are not drawn to scale.

Reference numerals illustrate:

1000. A vehicle; 100. a battery; 200. a controller; 300. a motor; 10. an upper cover; 20. a battery cell; 30. a case; 400. a battery module; 40. a battery pack; 41. a first battery subgroup; 42. a second battery subgroup; 50. a side plate; 51. a plate body; 52. an outer protruding portion; 53. a receiving groove; 60. a connecting plate; 61. a first reinforcing rib; 62. a second reinforcing rib; 70. an end plate; 71. convex ribs; 80. a bottom plate; 90. a fastening strap; x, a first direction; y, second direction; z, third direction.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "attached" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

The term "and/or" in the present application is merely an association relation describing the association object, and indicates that three kinds of relations may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In the present application, the character "/" generally indicates that the front and rear related objects are an or relationship.

In the embodiments of the present application, the same reference numerals denote the same components, and detailed descriptions of the same components are omitted in different embodiments for the sake of brevity. It should be understood that the thickness, length, width, etc. dimensions of the various components in the embodiments of the application shown in the drawings, as well as the overall thickness, length, width, etc. dimensions of the integrated device, are merely illustrative and should not be construed as limiting the application in any way.

The term "plurality" as used herein refers to two or more (including two).

In the present application, the battery cells may include a lithium ion secondary battery cell, a lithium ion primary battery cell, a lithium sulfur battery cell, a sodium lithium ion battery cell, a sodium ion battery cell, or a magnesium ion battery cell, which is not limited in the embodiment of the present application. The battery cell may be in a cylindrical shape, a flat shape, a rectangular parallelepiped shape, or other shapes, which is not limited in this embodiment of the application.

In the present application, the battery cells may include a lithium ion secondary battery cell, a lithium ion primary battery cell, a lithium sulfur battery cell, a sodium lithium ion battery cell, a sodium ion battery cell, or a magnesium ion battery cell, which is not limited in the embodiment of the present application. The battery cell may be in a cylindrical shape, a flat shape, a rectangular parallelepiped shape, or other shapes, which is not limited in this embodiment of the application. The battery cells are generally classified into three types according to the packaging method: the cylindrical battery cell, the square battery cell and the soft package battery cell are not limited in this embodiment.

Reference to a battery in accordance with an embodiment of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present application may include a battery module or a battery pack, or the like. The battery generally includes a case for enclosing one or more battery cells. The case body can prevent liquid or other foreign matters from affecting the charge or discharge of the battery cells.

The battery cell comprises an electrode assembly and electrolyte, wherein the electrode assembly consists of a positive plate, a negative plate and a separation membrane. The battery cell mainly relies on metal ions to move between the positive and negative electrode plates to operate. The positive plate comprises a positive electrode current collector and a positive electrode active material layer, wherein the positive electrode active material layer is coated on the surface of the positive electrode current collector, the current collector without the positive electrode active material layer protrudes out of the current collector coated with the positive electrode active material layer, and the current collector without the positive electrode active material layer is laminated to serve as a positive electrode lug. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate or the like. The negative electrode sheet comprises a negative electrode current collector and a negative electrode active material layer, wherein the negative electrode active material layer is coated on the surface of the negative electrode current collector, the current collector without the negative electrode active material layer protrudes out of the current collector coated with the negative electrode active material layer, and the current collector without the negative electrode active material layer is laminated to serve as a negative electrode tab. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon, silicon, or the like. The material of the separator may be PP (polypropylene) or PE (polyethylene). In addition, the electrode assembly may be a roll-to-roll structure or a lamination structure, and embodiments of the present application are not limited thereto.

The battery cell disclosed by the embodiment of the application can be used in electric devices such as vehicles, ships or aircrafts, but is not limited to the electric devices. The power supply system with the battery cells, batteries and the like disclosed by the application can be used for forming the power utilization device, so that the stability of the battery performance and the service life of the battery are improved.

The battery can exhibit different electrical cycle performance at different ambient temperatures, and when the ambient temperature is too high or too low, the cycle performance of the battery can be reduced, even causing a reduction in the service life thereof. In order to ensure the safe, stable and excellent running of the new energy automobile, the battery must be effectively thermally managed, and the battery is controlled to always work in a proper temperature range.

Currently, side plates are generally disposed at the sides of the battery module to fix the battery module. A heat exchange plate is arranged above the battery module to exchange heat with the battery monomers. Then place the battery module in the battery box, the heat exchanger plate has taken up the inner space of battery, has reduced the energy density of battery.

In order to solve the above technical problems, an embodiment of the present application provides a battery module, including a battery pack, a side plate, and a connecting plate, where the battery pack includes a first battery sub-group and a second battery sub-group, and the first battery sub-group and the second battery sub-group include a plurality of battery cells, respectively; the two side plates are respectively arranged at two opposite sides of the battery pack along the first direction, and heat exchange flow channels for heat exchange medium to flow are arranged in the side plates; two ends of the connecting plate are respectively connected with the two side plates, and the connecting plate is arranged between the first battery sub-group and the second battery sub-group.

In the scheme, the side plates are reused as the heat exchange plates, so that the heat exchange plates at the top are omitted, the space inside the battery is saved, and the energy density of the battery can be improved. And still be provided with the connecting plate between first battery subgroup and second battery subgroup, the connecting plate is connected with two curb plates respectively, has improved battery module's bulk strength.

The embodiment of the application provides an electric device using a battery as a power supply, wherein the electric device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft and the like. Among them, the electric toy may include fixed or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric plane toys, and the like, and the spacecraft may include planes, rockets, space planes, and spacecraft, and the like.

For convenience of description, the following embodiment will take an electric device according to an embodiment of the present application as an example of the vehicle 1000.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the application. The vehicle 1000 may be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or a range-extended vehicle. The battery 100 is provided in the interior of the vehicle 1000, and the battery 100 may be provided at the bottom or the head or the tail of the vehicle 1000. The battery 100 may be used for power supply of the vehicle 1000, for example, the battery 100 may be used as an operating power source of the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, the controller 200 being configured to control the battery 100 to power the motor 300, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000.

In some embodiments of the present application, battery 100 may not only serve as an operating power source for vehicle 1000, but may also serve as a driving power source for vehicle 1000, instead of or in part instead of fuel oil or natural gas, to provide driving power for vehicle 1000.

Referring to fig. 2, fig. 2 is an exploded view of a battery according to some embodiments of the present application. The battery 100 includes a battery case and a battery cell 20. In some embodiments, the battery case may include an upper cover 10 and a case 30, the upper cover 10 and the case 30 being covered with each other, the upper cover 10 and the case 30 together defining a receiving chamber for receiving the battery cell 20. The case 30 may have a hollow structure with one end opened, and the upper cover 10 may have a plate-shaped structure, and the upper cover 10 covers the opening side of the case 30, so that the upper cover 10 and the case 30 together define a receiving cavity; the upper cover 10 and the case 30 may be hollow structures with one side open, and the open side of the upper cover 10 may be closed to the open side of the case 30. Of course, the battery case formed by the upper cover 10 and the case 30 may be of various shapes, such as a cylinder, a rectangular parallelepiped, etc.

In the battery 100, the plurality of battery cells 20 may be connected in series, parallel or a series-parallel connection, wherein the series-parallel connection refers to that the plurality of battery cells 20 are connected in series or parallel. The plurality of battery cells 20 can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery cells 20 is accommodated in the box body; of course, the battery 100 may also be a battery module formed by connecting a plurality of battery cells 20 in series or parallel or series-parallel connection, and a plurality of battery modules are then connected in series or parallel or series-parallel connection to form a whole and are accommodated in a case. The battery 100 may further include other structures, for example, the battery 100 may further include a bus member for making electrical connection between the plurality of battery cells 20.

Wherein each battery cell 20 may be a secondary battery cell or a primary battery cell; but not limited to, lithium sulfur battery cells, sodium ion battery cells, or magnesium ion battery cells. The battery cell 20 may be in the shape of a cylinder, a flat body, a rectangular parallelepiped, or other shapes, etc.

Fig. 3 is a schematic structural view of a battery module according to some embodiments of the present application. As shown in fig. 3, in a first aspect, an embodiment of the present application provides a battery module 400, where the battery module 400 includes a battery pack 40, a side plate 50, and a connection plate 60, the battery pack 40 includes a first battery sub-group 41 and a second battery sub-group 42, and the first battery sub-group 41 and the second battery sub-group 42 include a plurality of battery cells 20, respectively; the two side plates 50 are respectively arranged at two opposite sides of the battery pack 40 along the first direction X, and heat exchange flow channels for heat exchange medium to flow are arranged in the side plates 50; the two ends of the connection plate 60 are respectively connected to the two side plates 50, and the connection plate 60 is disposed between the first battery sub-group 41 and the second battery sub-group 42.

The inside of the side plate 50 may be hollow, the side plate 50 may be formed by an integral extrusion process, and the heat exchange flow passages formed inside may be plural. The heat exchange medium can be water, glycol or other liquid, the temperature of the heat exchange medium in the heat exchange flow channel can be adjusted, and when the temperature of the battery pack 40 is too high, the side plate 50 can cool the battery pack 40; when the temperature of the battery pack 40 is too low, the side plate 50 can keep the temperature of the battery pack 40, and the service life of the battery 100 is prolonged.

The first direction X may be a longitudinal direction of the battery cells 20, and the plurality of battery cells 20 of the first battery sub-group 41 and the second battery sub-group 42 may be sequentially arranged along the first direction X. Of course, the first battery sub-group 41 and the second battery sub-group 42 may include one or more rows of battery cells 20, respectively. The arrangement and the number of the battery cells 20 of the first battery sub-group 41 and the second battery sub-group 42 may be the same or may be different. The connection plate 60 may be disposed at a middle position of the battery module 400, or may be disposed at a front or rear position of the battery module 400. The both ends of the connection plate 60 may be connected to the side plates 50 by welding, riveting, or bolting, etc.

In the above-mentioned scheme, the side plate 50 is reused as a heat exchange plate to cool or heat the battery pack 40, so that the heat exchange plate at the top is omitted, the space inside the battery 100 is saved, and the energy density of the battery 100 can be improved. And a connection plate 60 is further provided between the first battery sub-group 41 and the second battery sub-group 42, and the connection plate 60 is connected with the two side plates 50, respectively, to improve the overall strength of the battery module 400.

In some embodiments, the battery module 400 further includes two end plates 70, the two end plates 70 being disposed at opposite sides of the battery pack 40 in the second direction Y, respectively, and both ends of each end plate 70 being connected to the two side plates 50, respectively; wherein the first direction X and the second direction Y are arranged in a crossing way.

The first direction X may be a length direction of the battery cell 20, and the second direction Y may be a thickness direction of the battery cell 20, the first direction X and the second direction Y being perpendicular to each other.

The end plates 70 are interconnected with the side plates 50 to form a rectangular frame in which the battery pack 40 is restrained. The end plate 70 and the side plate 50 may be fixed by riveting, bolting, or clamping.

In the above-described scheme, the battery pack 40 is fixed by providing the side plates 50 and the end plates 70 at both sides of the battery pack 40 in different directions, respectively, thereby further improving the overall strength of the battery module 400.

Optionally, ribs 71 may be provided on the side of the end plate 70 remote from the battery pack 40 to increase the strength of the end plate 70.

In some embodiments, the first battery subgroup 41 and the second battery subgroup 42 are arranged sequentially along the second direction Y.

The first direction X may be a length direction of the battery cell 20, and the second direction Y may be a thickness direction of the battery cell 20, the first direction X and the second direction Y being perpendicular to each other.

The battery cells 20 of the first battery sub-group 41 and the second battery sub-group 42 may be sequentially arranged in the second direction Y, respectively, such that the side portions of the battery cells 20 of the first battery sub-group 41 and the battery cells 20 of the second battery sub-group 42 are in contact with the side plates 50, respectively. The second battery sub-groups 42 of the first battery sub-groups 41 each include two rows of battery cells 20, each row of battery cells 20 including a plurality of battery cells 20 arranged in sequence along the second direction Y, the two rows of battery cells 20 being arranged along the first direction X; the side portions of the battery cells 20 of one row are each in contact with one side plate 50, and the side portions of the battery cells 20 of the other row are each in contact with the other side plate 50.

In the above-mentioned scheme, the arrangement direction of the first battery sub-group 41 and the second battery sub-group 42 is different from the arrangement direction of the side plate 50, so that the side plate 50 can exchange heat with the first battery sub-group 41 and the second battery sub-group 42 at the same time, thereby improving the heat exchange efficiency.

Alternatively, the battery cells 20 may be adhered to the side plates 50 to further strengthen the overall strength of the battery module 400. The outer surface of the battery cell 20 is generally covered with an insulating film, and holes are formed in the insulating film at positions corresponding to the side plates 50 so that the battery cell 20 is exposed and is adhered and fixed to the side plates 50.

Fig. 4 is an exploded view of a battery module according to some embodiments of the present application. As shown in fig. 4, in some embodiments, the battery module 400 further includes a bottom plate 80, the bottom plate 80 being disposed at one side of the battery pack 40 in a third direction Z, the third direction Z being disposed to intersect the first direction X and the second direction Y, respectively, and the bottom plate 80 being fixed to the end plate 70.

The first direction X may be a length direction of the battery cell 20, the second direction Y is a thickness direction of the battery cell 20, and the third direction Z is a height direction of the battery cell 20, and any two of the first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

The bottom plate 80 and the side plates 50 and the end plates 70, respectively, may be fixed by bonding, welding, bolts, or the like. And a bottom guard plate may be omitted between the bottom plate 80 and the battery pack 40, and only the bottom plate 80 is used to support the battery pack 40.

In the above-described scheme, the battery pack 40 is fixed by providing the side plates 50, the end plates 70, and the bottom plate 80 at both sides of the battery pack 40 in different directions, respectively, thereby further improving the overall strength of the battery module 400.

Fig. 5 is a schematic structural diagram of a connection board according to some embodiments of the present application. As shown in fig. 5, in some embodiments, the interior of the connection plate 60 is hollow.

A certain degree of expansion occurs due to the gas generated inside during the operation of the battery cell 20. In the above-described embodiment, the connection plate 60 is formed in a hollow structure to absorb the expansion force generated when the battery cell 20 is operated.

In some embodiments, the interior of the connection plate 60 is provided with first reinforcing ribs 61.

The first reinforcement ribs 61 may extend in the second direction Y to support the battery cells 20 at both sides. Of course, the first reinforcing bead 61 may extend in other directions.

In the above-mentioned scheme, the strength of the connection plate 60 is improved by providing the first reinforcing ribs 61 inside the connection plate 60, thereby reinforcing the supporting force of the connection plate 60 to the battery cells 20.

In some embodiments, the connecting plate 60 is further provided with second reinforcing ribs 62, and the first reinforcing ribs 61 and the second reinforcing ribs 62 are respectively disposed in a crossing manner.

Illustratively, the first stiffener 61 extends in the second direction Y and the second stiffener 62 extends in the first direction X. The first reinforcing rib 61 and the second reinforcing rib 62 may be connected in a T-shape or a cross-shape.

In the above-mentioned scheme, the strength of the connection plate 60 is further improved by providing the first reinforcing ribs 61 and the second reinforcing ribs 62 in different directions inside the connection plate 60.

Fig. 6 is an exploded view of a battery module according to other embodiments of the present application. As shown in fig. 6, in some embodiments, the battery module 400 further includes a fastening band 90, the fastening band 90 being disposed along the circumferential direction of the battery pack 40.

The fastening band 90 may be a structure having a fastening function such as a steel band or a rubber band. The fastening strap 90 may be provided at a position near the upper end of the battery pack 40, or may be provided at a middle position of the battery pack 40, or the like.

In the above-described aspects, the battery pack 40 is bound by the fastening bands 90, further improving the overall strength of the battery module 400.

Fig. 7 is an enlarged schematic view of a portion a in fig. 3. As shown in fig. 7, in some embodiments, the side plate 50 includes a plate body 51 and an outer flange 52; the outer flange 52 protrudes from the end of the side plate 50 in a direction away from the battery pack 40, a receiving groove 53 is formed between the outer flange 52 and the battery pack 40, and a portion of the fastening strap 90 is disposed in the receiving groove 53.

Since the side plate 50 and the battery cell 20 are generally connected by adhesion, if the fastening strap 90 is disposed on the outer side of the side plate 50, the side plate 50 and the battery cell 20 are adhered, and then the fastening strap 90 is tied, the adhesive between the side plate 50 and the battery cell 20 is not cured yet, and the adhesion between the side plate 50 and the battery cell 20 is poor.

The embodiment of the present application binds the fastening band 90 first, then bonds the side plate 50 with the battery cell 20, and does not coat the glue between the side plate 50 and the steel band. Specifically, the fastening band 90 may be fastened to the battery pack 40 near the upper end, to more secure the adhesive area of the side plate 50 and the battery cell 20.

It is also possible to place the end plate 70 at the side of the battery pack 40, then bind the fastening band 90, and finally adhere the side plate 50 to the battery cell 20.

In the above-described embodiment, the problem of poor welding between the side plate 50 and the battery cell 20 can be improved by providing the fastening band 90 inside the side plate 50.

In a second aspect, the embodiment of the present application further provides a battery 100, including a battery 100 case and the battery module 400 of any of the foregoing embodiments, where the battery module 400 is disposed in the battery 100 case.

In a third aspect, an embodiment of the present application further provides an electrical device, including the above battery 100, where the battery 100 is configured to provide electrical energy.

According to some embodiments of the present application, there is provided a battery module 400, the battery module 400 including a battery pack 40, a side plate 50, and a connection plate 60, the battery pack 40 including a first battery sub-group 41 and a second battery sub-group 42, the first battery sub-group 41 and the second battery sub-group 42 including a plurality of battery cells 20, respectively; the two side plates 50 are respectively arranged at two opposite sides of the battery pack 40 along the first direction X, and heat exchange flow channels for heat exchange medium to flow are arranged in the side plates 50; the two ends of the connection plate 60 are respectively connected to the two side plates 50, and the connection plate 60 is disposed between the first battery sub-group 41 and the second battery sub-group 42. The battery module 400 further includes a fastening band 90, and the fastening band 90 is disposed along the circumferential direction of the battery pack 40. The side plate 50 includes a plate body 51 and an outer flange 52; the outer flange 52 protrudes from the end of the side plate 50 in a direction away from the battery pack 40, a receiving groove 53 is formed between the outer flange 52 and the battery pack 40, and a portion of the fastening strap 90 is disposed in the receiving groove 53.

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the application 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 be modified or some technical features may be replaced with others, which may not depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims (11)

1. A battery module, comprising:

A battery pack including a first battery sub-group and a second battery sub-group, the first battery sub-group and the second battery sub-group each including a plurality of battery cells;

The side plates are respectively arranged at two opposite sides of the battery pack along the first direction, and heat exchange flow channels for heat exchange medium to flow are arranged in the side plates;

The two ends of the connecting plate are respectively connected with the two side plates, and the connecting plate is arranged between the first battery subgroup and the second battery subgroup.

2. The battery module according to claim 1, further comprising two end plates respectively provided on opposite sides of the battery pack in the second direction, both ends of each of the end plates being respectively connected to the two side plates; the first direction and the second direction are arranged in a crossing mode.

3. The battery module of claim 2, wherein the first battery subgroup and the second battery subgroup are disposed sequentially along a second direction.

4. The battery module of claim 2, further comprising a bottom plate disposed on a side of the battery pack in a third direction, the third direction intersecting the first and second directions, respectively, the bottom plate being fixed to the end plate.

5. The battery module of claim 1, wherein the interior of the connecting plate is hollow.

6. The battery module of claim 5, wherein the interior of the connecting plate is provided with first ribs.

7. The battery module according to claim 6, wherein the connection plate is further provided with second reinforcing ribs inside, and the first reinforcing ribs and the second reinforcing ribs are disposed in a crossing manner, respectively.

8. The battery module of any one of claims 1-7, further comprising a fastening strap disposed along a circumferential direction of the battery pack.

9. The battery module of claim 8, wherein the side plate comprises:

A plate body;

And an outer protruding part protruding from the end part of the side plate in a direction away from the battery pack, wherein an accommodating groove is formed between the outer protruding part and the battery pack, and a part of the fastening belt is arranged in the accommodating groove.

10. A battery, comprising:

A battery box;

And the battery module according to any one of claims 1 to 9, which is provided in the battery box.

11. An electrical device comprising a battery according to claim 10 for providing electrical energy.