Battery device and electric device

Abstract

The utility model provides a battery device and a power utilization device.The battery device comprises a heat exchange part and at least two battery monomer assemblies which are arranged in the first direction, each battery monomer assembly comprises at least two battery monomers arranged in the second direction, and the second direction is perpendicular to the first direction; the heat exchange piece exchanges heat with the battery monomers, and the heat exchange piece penetrates through the at least two battery monomer assemblies in the first direction and is connected with the at least two battery monomer assemblies arranged in the first direction. According to the structure, the heat exchange piece penetrates through the at least two battery monomer components along the first direction and is connected with the at least two battery monomer components arranged along the first direction, so that the at least two battery monomer components arranged along the first direction can be firmly connected together, and the structural strength of the battery device can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery device, in particular to a battery device and a power utilization device. BACKGROUND

[0002] The battery device has the advantages of high specific energy and high power density, and is widely used in electronic equipment and vehicles, such as mobile phones, notebook computers, electric vehicles, electric cars, electric planes, electric ships and electric tools.

[0003] With the continuous expansion of the application scenarios of the battery device, people's requirements for the overall structural strength of the battery device are also getting higher and higher. How to improve the structural strength of the battery device is more and more concerned by the technical personnel in the field. CONTENT OF THE UTILITY MODEL

[0004] In view of the above problems, the present application provides a battery device and a power utilization device, which has strong structural strength.

[0005] In the first aspect, the present application provides a battery device, which comprises a heat exchange member and at least two battery monomer assemblies arranged along a first direction, each battery monomer assembly comprising at least two battery monomers arranged along a second direction perpendicular to the first direction; the heat exchange member exchanges heat with the battery monomers, and is arranged along the first direction through the at least two battery monomer assemblies and connected with the at least two battery monomer assemblies arranged along the first direction.

[0006] In the above structure, since the heat exchange member is arranged along the first direction through the at least two battery monomer assemblies and connected with the at least two battery monomer assemblies arranged along the first direction, the at least two battery monomer assemblies arranged along the first direction can be firmly connected together, which is beneficial to improve the structural strength of the battery device.

[0007] According to the battery device provided by some embodiments of the present application, the battery device further comprises a box body comprising a plurality of bearing plates arranged along the first direction at intervals, at least two second constraint plates arranged along a third direction at intervals are arranged between adjacent two bearing plates, the second constraint plates are connected between the adjacent two bearing plates, the battery monomer assemblies are arranged in cavities surrounded by the bearing plates and the second constraint plates, the third direction, the second direction and the first direction are perpendicular to each other, and the heat exchange member sequentially passes through the plurality of bearing plates along the first direction. Through the above structure, the battery monomer assemblies in the cavities can be protected by the bearing plates and the second constraint plates.

[0008] According to the battery device provided by some embodiments of the present application, the second constraint plate is provided with a ventilation passage penetrating through the second constraint plate along the second direction. By providing the ventilation passage on the second constraint plate and making the ventilation passage penetrate through the second constraint plate along the second direction, the air on both sides of the second constraint plate in the second direction can communicate with each other, so that the air flow can pass through the second constraint plate to take away the heat of the second constraint plate, thereby improving the heat dissipation performance of the battery device.

[0009] According to the battery device provided by some embodiments of the present application, the two second constraint plates adjacent in the first direction are integrally formed, which is beneficial to improve the overall structural strength of the box body and the structural strength of the battery device.

[0010] According to the battery device provided by some embodiments of the present application, the box body further comprises two third constraint plates oppositely arranged along the second direction, the third constraint plates are connected to the outer sides of the plurality of bearing plates in the second direction, and the third constraint plates are connected to the outer sides of the plurality of second constraint plates in the second direction. By oppositely arranging the two third constraint plates along the second direction, the two third constraint plates can close the two openings of the cavity, so that the cavity is a closed space structure, thereby better protecting the battery cell assembly in the cavity.

[0011] According to the battery device provided by some embodiments of the present application, at least one of the second constraint plates on both sides of the battery cell assembly in the third direction is provided with a pressure relief passage and a pressure relief opening, the pressure relief opening is in communication with the pressure relief passage, the pressure relief passage penetrates through the second constraint plate along the second direction, and the pressure relief opening is in communication with the pressure relief mechanism of the battery cell. By making the pressure relief opening in communication with the pressure relief passage and the pressure relief mechanism of the battery cell, the discharge substance discharged by the pressure relief mechanism can smoothly enter the pressure relief passage through the pressure relief opening, thereby being smoothly discharged out of the battery device.

[0012] According to the battery device provided by some embodiments of the present application, the second constraint plate between the two battery cell assemblies adjacent in the third direction is provided with two pressure relief passages, the two pressure relief passages are arranged at intervals along the third direction, and the two pressure relief passages are respectively in communication with the pressure relief mechanisms of the battery cells in the two battery cell assemblies adjacent in the third direction through the pressure relief openings.

[0013] By providing the two pressure relief passages in the second constraint plate between the two battery cell assemblies adjacent in the third direction and making the two pressure relief passages respectively in communication with the pressure relief mechanisms of the battery cells in the two battery cell assemblies adjacent in the third direction through the pressure relief openings, the two pressure relief passages in the second constraint plate can be respectively in communication with the pressure relief mechanisms of the battery cells in the two battery cell assemblies adjacent in the third direction through the pressure relief openings, thereby facilitating the pressure relief of the battery cells in the two battery cell assemblies.

[0014] According to the battery device provided by some embodiments of the present application, the pressure relief mechanism is arranged on the side of the battery cell facing the second constraint plate, and the pressure relief opening cover is arranged on the outer periphery of the pressure relief mechanism, so that the pressure relief opening is in sealed communication with the pressure relief mechanism, and the released substances discharged from the pressure relief mechanism can smoothly pass through the pressure relief opening into the pressure relief channel.

[0015] According to the battery device provided by some embodiments of the present application, the heat exchange member is clamped between the battery cell and the second constraint plate, the pressure relief mechanism is arranged on the side of the battery cell facing the heat exchange member, the heat exchange member is provided with a third through hole penetrating in the third direction, and the pressure relief opening is in communication with the pressure relief mechanism through the third through hole, so that the released substances discharged from the pressure relief mechanism can pass through the third through hole and the pressure relief opening into the pressure relief channel.

[0016] According to the battery device provided by some embodiments of the present application, the battery cell assembly further comprises a current collecting component, the heat exchange member is clamped between the adjacent two battery cells, the heat exchange member is provided with a second through hole penetrating in the second direction, and the current collecting component passes through the second through hole to electrically connect the at least two battery cells in the battery cell assembly, so that the at least two battery cells in the battery cell assembly are charged and discharged as a whole.

[0017] In the second aspect, the present application provides a power utilization device, which comprises the battery device provided by any of the technical solutions above, and the battery device is used to provide electric energy.

[0018] The technical solutions provided by the embodiments of the present application at least bring the following beneficial effects:

[0019] The present application provides a battery device, which comprises a heat exchange member and at least two battery cell assemblies arranged in a first direction, each of the battery cell assemblies comprises at least two battery cells arranged in a second direction, the second direction is perpendicular to the first direction; the heat exchange member exchanges heat with the battery cells, and the heat exchange member is arranged in the at least two battery cell assemblies in the first direction and connected with the at least two battery cell assemblies arranged in the first direction.

[0020] In the above structure, since the heat exchange member is arranged in the at least two battery cell assemblies in the first direction and connected with the at least two battery cell assemblies arranged in the first direction, the at least two battery cell assemblies arranged in the first direction can be more firmly connected together, which is beneficial to improve the structural strength of the battery device.

[0021] The above description is only a summary of the technical solutions of the present application, in order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0022] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments with reference made to the accompanying drawings. The drawings are for purposes of illustration only and are not intended to limit the scope of the present application. The same reference numbers in different drawings identify the same components.

[0023] Figure 1 A structural schematic diagram of a vehicle provided by some embodiments of the present application;

[0024] Figure 2 A split view of a battery device provided by some embodiments of the present application;

[0025] Figure 3 A split view of a battery device provided by some other embodiments of the present application;

[0026] Figure 4 A split view of a battery device provided by some other embodiments of the present application;

[0027] Figure 5 A structural schematic diagram of a battery device provided by some embodiments of the present application;

[0028] Figure 6 A structural schematic diagram of a battery device provided by some other embodiments of the present application;

[0029] Figure 7 A structural schematic diagram of a second constraint plate in a battery device provided by some embodiments of the present application;

[0030] Figure 8 A structural schematic diagram of a battery cell in a battery device provided by some embodiments of the present application.

[0031] In the drawings:

[0032] 1, vehicle; 2, battery device; 3, controller; 4, motor; 5, box body; 5a, first box body part; 5b, second box body part; 5c, accommodating space; 51, bearing plate; 511, first through hole; 52, second constraint plate; 521, air passage; 522, pressure relief passage; 523, pressure relief opening; 53, third constraint plate; 6, battery cell assembly; 7, battery cell; 71, pressure relief mechanism; 8, heat exchange member; 81, third through hole; 82, second through hole; 9, busbar; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0033] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0034] It should be noted that, unless otherwise specified, technical terms or scientific terms used in the embodiments of the present application shall have their ordinary meanings understood by those skilled in the art to which the embodiments of the present application belong.

[0035] In the description of the embodiments of the present application, the orientations or positional relationships indicated by the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like are based on the orientations or positional relationships shown in the drawings, and are merely for the purpose of facilitating the description of the embodiments of the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0036] In addition, the technical terms "first", "second", and the like are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more (including two), unless otherwise explicitly specified and limited.

[0037] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing", and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0038] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over", and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under", and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0039] At present, from the development of market situation, the application of battery device is more and more extensive. The battery device is not only applied to the energy storage power system of hydropower, thermal power, wind power and solar power station, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric vehicles, electric vehicles, military equipment and aerospace and other fields.

[0040] The battery device mentioned in the embodiments of the present application refers to a single physical module including one or more battery cell assemblies to provide higher voltage and capacity. The battery cell assembly can include a plurality of battery cells connected in series, parallel or mixed connection through the busbar component.

[0041] As an example, the battery cell assembly can be a battery module formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0042] The battery cell can be a secondary battery cell, which refers to a battery cell that can be activated by charging after discharging the battery cell.

[0043] The battery cell can be a lithium ion battery cell, a sodium ion battery cell, a sodium lithium ion battery cell, a lithium metal battery cell, a sodium metal battery cell, a lithium sulfur battery cell, a magnesium ion battery cell, a nickel hydrogen battery cell, a nickel cadmium battery cell, a lead-acid battery cell, etc.

[0044] The battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of the battery cell, active ions (such as lithium ions) are embedded and extracted between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode, which can prevent the positive and negative electrodes from short-circuiting, and at the same time allow the active ions to pass through.

[0045] The electrode assembly can be a winding structure, a laminated structure, or a hybrid structure of winding and laminating.

[0046] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell, or other shaped battery cells, the prismatic battery cell includes a square battery cell, a blade-shaped battery cell, a multi-prismatic battery, such as a hexagonal battery, etc.

[0047] In some embodiments, the battery device can be a battery module, and when there are a plurality of battery cells, the plurality of battery cells are arranged and fixed to form a battery module.

[0048] In some embodiments, the battery device can be a battery pack, and the battery pack includes a box body and a battery cell, and the battery cell or the battery module is contained in the box body.

[0049] In some embodiments, the box can be part of a chassis structure of a vehicle. For example, parts of the box can be part of a floor of the vehicle, or parts of the box can be part of cross beams and longitudinal beams of the vehicle.

[0050] In some embodiments, the battery device can be an energy storage device. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0051] In large equipment such as heavy trucks, engineering vehicles, etc., a space of large size and height can be planned to arrange the battery device. The battery device therein is usually provided with multiple layers of battery cell assemblies in the height direction, so that the battery device has a large capacity. Since the battery device has a high height and weight, the structural strength thereof is more concerned by those skilled in the art.

[0052] In order to improve the structural strength of the battery device, some embodiments of the present application provide a battery device, which comprises a heat exchange member and at least two battery cell assemblies arranged along a first direction, the battery cell assembly comprising at least two battery cells arranged along a second direction perpendicular to the first direction; the heat exchange member exchanges heat with the battery cells, and the heat exchange member is arranged through the at least two battery cell assemblies along the first direction and connected with the at least two battery cell assemblies arranged along the first direction. In the above structure, since the heat exchange member is arranged through the at least two battery cell assemblies along the first direction and connected with the at least two battery cell assemblies arranged along the first direction, the at least two battery cell assemblies arranged along the first direction can be more firmly connected together, which is conducive to improving the structural strength of the battery device.

[0053] The battery device described in the embodiments of the present application is suitable for use in an electric device using the battery device.

[0054] The electric device can be a vehicle, a ship, a spacecraft, an electric toy, an electric tool, etc. The vehicle can be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile, or a range extended automobile, etc. The spacecraft includes an airplane, a rocket, a space shuttle, a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, such as a game console, an electric automobile toy, an electric ship toy, an electric airplane toy, etc. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembling electric tool, and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator, an electric planer, etc.

[0055] The following embodiments are described by taking a vehicle as an example for convenience of description.

[0056] Figure 1 A structural schematic diagram of a vehicle is provided for some embodiments of the present application.

[0057] As shown in the figure, the interior of the vehicle 1 is provided with a battery device 2, which can be arranged at the bottom or the head or the tail of the vehicle 1. The battery device 2 can be used for power supply of the vehicle 1, for example, the battery device 2 can be used as the operating power supply of the vehicle 1. Figure 1

[0058] The vehicle 1 can also include a controller 3 and a motor 4, the controller 3 is used to control the battery device 2 to supply power to the motor 4, for example, for the power demand of the vehicle 1 during starting, navigation and driving.

[0059] In some embodiments of the present application, the battery device 2 can not only be used as the operating power supply of the vehicle 1, but also be used as the driving power supply of the vehicle 1, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1.

[0060] Figure 2 The split structure schematic diagram of the battery device provided in some embodiments of the present application is shown in the figure. As shown in the figure, the battery device 2 includes a box body 5 and a battery monomer assembly 6, the battery monomer assembly 6 is contained in the box body 5. The battery monomer assembly 6 includes a plurality of battery monomers 7, the battery monomer 7 is the smallest unit constituting the battery. Figure 2

[0061] The box body 5 is used to contain the battery monomer 7, and the box body 5 can be of various structures. In some embodiments, the box body 5 can include a first box body part 5a and a second box body part 5b, the first box body part 5a and the second box body part 5b are mutually covered, and the first box body part 5a and the second box body part 5b jointly define a containing space 5c for containing the battery monomer assembly 6. The second box body part 5b can be a hollow structure with one end open, and the first box body part 5a is a plate-shaped structure, which is covered on the open side of the second box body part 5b to form the box body 5 with the containing space 5c; the first box body part 5a and the second box body part 5b can also be hollow structures with one side open, and the open side of the first box body part 5a is covered on the open side of the second box body part 5b to form the box body 5 with the containing space 5c. Of course, the first box body part 5a and the second box body part 5b can be of various shapes, such as cylinder, cuboid, etc.

[0062] In order to improve the sealing performance of the first box body part 5a and the second box body part 5b after being connected, a sealing member such as sealing glue, sealing ring, etc. can be arranged between the first box body part 5a and the second box body part 5b.

[0063] Suppose the first box body part 5a is covered on the top of the second box body part 5b, the first box body part 5a can also be called the upper box cover, and the second box body part 5b can also be called the lower box body.

[0064] ​​A plurality of battery cell assemblies 6 can be arranged in the battery device. The plurality of battery cells 7 in the battery cell assembly 6 can be connected in series, in parallel, or in a mixed connection, which means that the plurality of battery cells 7 are connected in both series and parallel.

[0065] Some embodiments of the present application provide a battery device 2, referring to Figures 3-4 The battery device 2 comprises a heat exchange member 8 and at least two battery cell assemblies 6 arranged along a first direction X, each battery cell assembly 6 comprising at least two battery cells 7 arranged along a second direction Y perpendicular to the first direction X; the heat exchange member 8 is arranged in heat exchange with the battery cells 7, and the heat exchange member 8 is arranged in the at least two battery cell assemblies 6 along the first direction X and connected with the at least two battery cell assemblies 6 arranged along the first direction X.

[0066] Each battery cell assembly 6 is generally formed by arranging a plurality of battery cells 7. The battery cell assembly 6 can be a battery module formed by arranging and fixing a plurality of battery cells 7 into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells 7 with a cable tie.

[0067] The battery cell assemblies 6 in the battery device 2 can be two, or three or more. The at least two battery cell assemblies 6 arranged along the first direction X can mean that the at least two battery cell assemblies 6 are arranged along the first direction X in sequence, and the projections of the at least two battery cell assemblies 6 on the first direction X coincide. As an example, the first direction X can be a vertical direction, so that the at least two battery cell assemblies 6 are arranged along the vertical direction.

[0068] The battery cell assembly 6 comprises at least two battery cells 7 arranged along a second direction Y, which can mean that the battery cell assembly 6 comprises two battery cells 7, and the at least two battery cells 7 are arranged along the second direction Y. The at least two battery cells 7 arranged along the second direction Y can mean that the at least two battery cells 7 are arranged along the second direction Y in sequence, and the projections of the at least two battery cells 7 on the second direction Y coincide. The at least two battery cells 7 in the battery cell assembly 6 can be two, or three or more.

[0069] By configuring the second direction Y to be perpendicular to the first direction X, the arrangement of the battery cells 7 in the battery cell assembly 6 is neat, which is conducive to improving the utilization rate of the internal space of the battery device 2.

[0070] The heat exchange member 8 can be a device for heat exchange in the battery device 2, which can enable the devices in the battery device 2 to be within a suitable temperature range, and is conducive to enabling the devices to work stably.

[0071] Since the battery cells 7 generate heat during operation, the heat in the battery device 2 can be rapidly transferred to the outside through the heat exchange member 8 by heat exchange between the heat exchange member 8 and the battery cells 7, so that the heat exchange member 8 can well maintain the temperature in the battery device 2.

[0072] The heat exchange member 8 is arranged along the first direction X through the at least two battery cell assemblies 6, which means that the heat exchange member 8 extends along the first direction X and sequentially passes through the at least two battery cell assemblies 6 arranged along the first direction X to exchange heat with the battery cells 7 in the at least two battery cell assemblies 6 arranged along the first direction X, so that the heat exchange member 8 can be shared by the at least two battery cell assemblies 6 arranged along the first direction X.

[0073] By connecting the heat exchange member 8 with the at least two battery cell assemblies 6 arranged along the first direction X, the heat exchange member 8 connects the at least two battery cell assemblies 6 arranged along the first direction X, so that the heat exchange member 8 can connect the at least two battery cell assemblies 6 arranged along the first direction X as a whole, which is conducive to improving the integrity of the at least two battery cell assemblies 6 in the battery device 2 and improving the structural strength of the battery device 2.

[0074] In the above structure, since the heat exchange member 8 is arranged along the first direction X through the at least two battery cell assemblies 6 and connected with the at least two battery cell assemblies 6 arranged along the first direction X, the at least two battery cell assemblies 6 arranged along the first direction X can be more firmly connected together, which is conducive to improving the structural strength of the battery device 2.

[0075] In some embodiments, referring to Figures 5-6 The battery device 2 further includes a box body 5, the box body 5 includes a plurality of bearing plates 51 arranged along the first direction X at intervals, at least two second constraint plates 52 arranged along the third direction Z at intervals are arranged between adjacent two bearing plates 51, the second constraint plates 52 are connected between the adjacent two bearing plates 51, the battery cell assemblies 6 are arranged in a cavity surrounded by the bearing plates 51 and the second constraint plates 52, the third direction Z, the second direction Y and the first direction X are perpendicular to each other, and the heat exchange member 8 sequentially passes through the plurality of bearing plates 51 along the first direction X.

[0076] The box body 5 can be a component for protecting the at least two battery cell assemblies 6 in the battery device 2, which accommodates the at least two battery cell assemblies 6, not only connects the at least two battery cell assemblies 6 as a whole, but also is conducive to improving the structural strength of the battery device 2, and can also play a protective role for the battery cell assemblies 6 inside.

[0077] The bearing plate 51 can be a component in the box 5 for bearing the battery cell assembly 6. By spacing a plurality of bearing plates 51 along the first direction X, the plurality of bearing plates 51 can bear at least two battery cell assemblies 6 arranged along the first direction X.

[0078] The second constraint plate 52 can be used to bind the battery cell assembly 6, and is connected with the bearing plate 51 to limit the battery cell assembly 6. The third direction Z can be a direction perpendicular to the first direction X and the second direction Y. By spacing at least two second constraint plates 52 along the third direction Z between adjacent two bearing plates 51, the at least two second constraint plates 52 can limit the battery cell assembly 6 located in the middle from both sides of the third direction Z.

[0079] The at least two second constraint plates 52 spaced along the third direction Z between adjacent two bearing plates 51 can be that two second constraint plates 52 are spaced along the third direction Z between adjacent two bearing plates 51, and one battery cell assembly 6 is arranged between the two second constraint plates 52, and the second constraint plates 52 can limit the battery cell assembly 6 together with the bearing plate 51; or that three or more second constraint plates 52 are spaced along the third direction Z between adjacent two bearing plates 51, and one battery cell assembly 6 is arranged between adjacent two second constraint plates 52 among the three second constraint plates 52, and the second constraint plates 52 can limit the battery cell assembly 6 together with the bearing plate 51.

[0080] The second constraint plate 52 is connected between adjacent two bearing plates 51, which can mean that the second constraint plate 52 is connected to adjacent two bearing plates 51 at both ends of the first direction X, so that adjacent two bearing plates 51 and adjacent two second constraint plates 52 can enclose a cavity for containing the battery cell assembly 6, so that the battery cell assembly 6 located in the cavity can be protected by the bearing plate 51 and the second constraint plate 52. The cavity has openings at both ends of the second direction Y, so that the battery cell assembly 6 can be more conveniently arranged in the cavity.

[0081] By making the heat exchange member 8 pass through the plurality of bearing plates 51 along the first direction X in turn, the heat exchange member 8 can pass through the at least two battery cell assemblies 6 arranged along the first direction X, so that the heat exchange member 8 can be connected with the at least two battery cell assemblies 6 arranged along the first direction X. Exemplarily, the first constraint plate is provided with a first through hole 511 penetrating along the first direction X, and the heat exchange member 8 passes through the first through hole 511.

[0082] In some embodiments, the second constraint plate 52 is provided with a ventilation passage 521 penetrating the second constraint plate 52 along the second direction Y.

[0083] The ventilation passage 521 can be a passage provided in the second constraint plate 52 for ventilation. By providing the ventilation passage 521 on the second constraint plate 52 and making the ventilation passage 521 penetrate through the second constraint plate 52 along the second direction Y, the air on both sides of the second constraint plate 52 in the second direction Y can be connected to each other, so that the air flow can pass through the second constraint plate 52 to take away the heat of the second constraint plate 52, thereby improving the heat dissipation performance of the battery device 2.

[0084] In some embodiments, referring to Figure 6 , the two second constraint plates 52 adjacent along the first direction X are integrally formed.

[0085] The two second constraint plates 52 adjacent along the first direction X can refer to the two second constraint plates 52 that are directly opposite along the first direction X. By setting the two second constraint plates 52 adjacent along the first direction X as an integrally formed structure, the at least two second constraint plates 52 arranged along the first direction X are integrally formed, which is conducive to improving the overall structural strength of the box body 5 and the structural strength of the battery device 2.

[0086] Exemplarily, the at least two second constraint plates 52 arranged along the first direction X can be made by a processing method such as casting, so that the at least two second constraint plates 52 can be manufactured synchronously as a whole, which not only makes the processing and manufacturing of the bracket convenient, but also makes the overall structure of the bracket have good strength.

[0087] In some embodiments, referring to Figure 6 , the box body 5 further comprises two third constraint plates 53 oppositely arranged along the second direction Y, the third constraint plates 53 are connected to the outer sides of the plurality of bearing plates 51 in the second direction Y, and the third constraint plates 53 are connected to the outer sides of the plurality of second constraint plates 52 in the second direction Y.

[0088] The third constraint plate 53 can refer to a plate-shaped member oppositely arranged along the second direction Y in the box body 5, which is used to cover the opening of the cavity. By oppositely arranging the two third constraint plates 53 along the second direction Y, the two third constraint plates 53 can close the two openings of the cavity.

[0089] The third constraint plate 53 connected to the outer sides of the plurality of bearing plates 51 in the second direction Y and the outer sides of the plurality of second constraint plates 52 in the second direction Y can refer to that the two third constraint plates 53 are respectively connected to the second constraint plates 52 and the bearing plates 51 from the outer sides along the second direction Y, so that the two third constraint plates 53 are respectively covered on the two openings of the cavity from the outer sides along the second direction Y, so that the cavity is a closed space structure, so as to better protect the battery cell assembly 6 located in the cavity.

[0090] Exemplarily, the third constraint plate 53 can be an integral structure extending along the first direction X, which connects the plurality of bearing plates 51 arranged at intervals along the first direction X, and is advantageous to improve the structural strength of the battery device 2.

[0091] In some embodiments, at least one of the second constraint plates 52 on both sides of the battery cell assembly 6 in the third direction Z is provided with a pressure relief channel 522 and a pressure relief opening 523, the pressure relief opening 523 is in communication with the pressure relief channel 522, the pressure relief channel 522 penetrates the second constraint plate 52 along the second direction Y, and the pressure relief opening 523 is in communication with the pressure relief mechanism 71 of the battery cell 7.

[0092] The pressure relief channel 522 can be a channel for discharging the discharge material discharged by the pressure relief mechanism 71 of the battery cell 7 outward when the battery cell 7 is in thermal runaway. By penetrating the second constraint plate 52 along the second direction Y with the pressure relief channel 522, the discharge material can be discharged to the outside of the battery device 2 along the second direction Y through the pressure relief channel 522.

[0093] The pressure relief opening 523 can be an opening structure provided in the second constraint plate 52, which is used to smoothly enter the discharge material discharged from the pressure relief mechanism 71 into the pressure relief channel 522. By making the pressure relief opening 523 in communication with the pressure relief channel 522 and the pressure relief mechanism 71 of the battery cell 7, the discharge material discharged by the pressure relief mechanism 71 can smoothly enter the pressure relief channel 522 through the pressure relief opening 523, and thus be discharged smoothly outside the battery device 2.

[0094] Exemplarily, the communication of the pressure relief opening 523 with the pressure relief mechanism 71 of the battery cell 7 can be that the pressure relief opening 523 is in communication with the pressure relief mechanism 71 through a connecting pipe or the like, and the discharge material discharged by the pressure relief mechanism 71 can smoothly enter the pressure relief channel 522 through the pressure relief opening 523; or the pressure relief opening 523 is sealed on the pressure relief mechanism 71, so that the discharge material discharged by the pressure relief mechanism 71 can smoothly enter the pressure relief channel 522 through the pressure relief opening 523.

[0095] At least one of the second constraint plates 52 on both sides of the battery cell assembly 6 in the third direction Z is provided with a pressure relief channel 522 and a pressure relief opening 523. In one embodiment, one of the second constraint plates 52 on both sides of the battery cell assembly 6 in the third direction Z is provided with a pressure relief channel 522 and a pressure relief opening 523, so that the discharge material of the battery cell 7 in the battery cell assembly 6 discharged by the pressure relief mechanism 71 can be discharged to the outside of the battery device 2 through the pressure relief channel 522 and the pressure relief opening 523 in the second constraint plate 52. In another embodiment, both of the second constraint plates 52 on both sides of the battery cell assembly 6 in the third direction Z are provided with a pressure relief channel 522 and a pressure relief opening 523, so that the discharge material of the battery cell 7 in the battery cell assembly 6 discharged by the pressure relief mechanism 71 can be discharged to the outside of the battery device 2 through the pressure relief channel 522 and the pressure relief opening 523 in the second constraint plate 52.

[0096] In some embodiments, two pressure relief channels 522 are provided in the second constraint plate 52 between two adjacent battery cell assemblies 6 in the third direction Z, as shown in FIG. 6. The two pressure relief channels 522 are arranged in the third direction Z, and the two pressure relief channels 522 are respectively communicated with the pressure relief mechanism 71 of the battery cell 7 in the two adjacent battery cell assemblies 6 in the third direction Z through the pressure relief openings 523. Figure 7

[0097] In some embodiments, two pressure relief channels 522 are provided in the second constraint plate 52 between two adjacent battery cell assemblies 6 in the third direction Z, as shown in FIG. 6. The two pressure relief channels 522 are arranged in the third direction Z, and the two pressure relief channels 522 are respectively communicated with the pressure relief mechanism 71 of the battery cell 7 in the two adjacent battery cell assemblies 6 in the third direction Z through the pressure relief openings 523.

[0098] In some embodiments, two pressure relief channels 522 are provided in the second constraint plate 52 between two adjacent battery cell assemblies 6 in the third direction Z, as shown in FIG. 6. The two pressure relief channels 522 are arranged in the third direction Z, and the two pressure relief channels 522 are respectively communicated with the pressure relief mechanism 71 of the battery cell 7 in the two adjacent battery cell assemblies 6 in the third direction Z through the pressure relief openings 523.

[0099] ​Two pressure relief channels 522 are arranged in the second constraint plate 52 between two adjacent battery cell assemblies 6 in the third direction Z, and the two pressure relief channels 522 are respectively communicated with the pressure relief mechanism 71 of the battery cell 7 in the two adjacent battery cell assemblies 6 in the third direction Z through the pressure relief openings 523, so that the two pressure relief channels 522 in the second constraint plate 52 can be respectively communicated with the pressure relief mechanism 71 of the battery cell 7 in the two adjacent battery cell assemblies 6 in the third direction Z through the pressure relief openings 523, facilitating the pressure relief of the battery cell 7 in the two battery cell assemblies 6.

[0100] In some embodiments, referring to Figure 8 The pressure relief mechanism 71 is arranged on the side of the battery cell 7 facing the second constraint plate 52, and the pressure relief opening 523 is arranged on the outer periphery of the pressure relief mechanism 71.

[0101] By arranging the pressure relief mechanism 71 on the side of the battery cell 7 facing the second constraint plate 52, the pressure relief mechanism 71 can be conveniently communicated with the pressure relief opening 523 on the second constraint plate 52. By sealingly arranging the pressure relief opening 523 on the outer periphery of the pressure relief mechanism 71, the pressure relief opening 523 can be sealingly communicated with the pressure relief mechanism 71, so that the released substances discharged from the pressure relief mechanism 71 can smoothly pass through the pressure relief opening 523 into the pressure relief channel 522.

[0102] In some embodiments, the heat exchange member 8 is arranged between the battery cell 7 and the second constraint plate 52, the pressure relief mechanism 71 is arranged on the side of the battery cell 7 facing the heat exchange member 8, the heat exchange member 8 is provided with a third through hole 81 penetrating in the third direction Z, and the pressure relief opening 523 is communicated with the pressure relief mechanism 71 through the third through hole 81.

[0103] By arranging the heat exchange member 8 between the battery cell 7 and the second constraint plate 52, not only can the heat exchange member 8 be more firmly connected to the battery cell assembly 6, but also the heat exchange member 8 can be in contact with the battery cell 7, which is conducive to heat exchange between the heat exchange member 8 and the battery cell 7.

[0104] The pressure relief mechanism 71 arranged on the side of the battery cell 7 facing the heat exchange member 8 can mean that the pressure relief mechanism 71 for relieving the pressure of the battery cell 7 is arranged on the side wall of the battery cell 7 facing the heat exchange member 8, which facilitates the pressure relief mechanism 71 to be closer to the second constraint plate 52, and is conducive to improving the convenience of the communication between the pressure relief mechanism 71 and the pressure relief opening 523 on the second constraint plate 52.

[0105] The third through hole 81 can be a hole structure provided on the heat exchange member 8, which penetrates the heat exchange member 8 along the third direction Z, so that the third through hole 81 can be in communication with the pressure relief opening 523 and the pressure relief mechanism 71 at both ends in the third direction Z, so that the released substances discharged from the pressure relief mechanism 71 can enter the pressure relief channel 522 through the third through hole 81 and the pressure relief opening 523.

[0106] In some embodiments, the battery monomer assembly 6 further comprises a current collecting component 9, and the heat exchange member 8 is clamped between two adjacent battery monomers 7, and the heat exchange member 8 is provided with a second through hole 82 penetrating along the second direction Y, and the current collecting component 9 passes through the second through hole 82 to electrically connect at least two battery monomers 7 in the battery monomer assembly 6.

[0107] The current collecting component 9 can refer to a component in the battery monomer assembly 6 for electrically connecting at least two battery monomers 7. By electrically connecting at least two battery monomers 7, at least two battery monomers 7 in the battery monomer assembly 6 can be connected in series, parallel or mixed.

[0108] By clamping the heat exchange member 8 between two adjacent battery monomers 7, the heat exchange member 8 can be in contact with the two battery monomers 7 on both sides, so that the heat exchange member 8 can better exchange heat with the battery monomers 7 in the battery monomer assembly 6, which is beneficial to improve the heat dissipation capacity of the battery device 2.

[0109] The second through hole 82 can be a hole structure provided on the heat exchange member 8, which penetrates the heat exchange member 8 along the second direction Y, so that the second through hole 82 can communicate adjacent battery monomers 7 arranged along the second direction Y at both ends in the second direction Y. Since the heat exchange member 8 is clamped between two adjacent battery monomers 7, the heat exchange member 8 blocks the adjacent battery monomers 7 arranged along the second direction Y. By providing the second through hole 82 on the heat exchange member 8, the current collecting component 9 can pass through the second through hole 82 to electrically connect at least two battery monomers 7 in the battery monomer assembly 6, so that at least two battery monomers 7 in the battery monomer assembly 6 can be charged and discharged as a whole.

[0110] Some embodiments of the present application also provide a power utilization device, which comprises the battery device 2 provided in any of the technical solutions described above, and the battery device 2 is used to provide electric energy.

[0111] Since the power utilization device comprises the battery device 2 provided in any of the technical solutions described above, which has strong structural strength, the reliability of the power utilization device can be improved.

[0112] According to some embodiments of the present application, the present application provides a battery device 2, which comprises a box 5, a heat exchange element 8 and at least two battery cell assemblies 6, the box 5 comprises a plurality of bearing plates 51 arranged at intervals along a first direction X, at least two second constraint plates 52 arranged at intervals along a third direction Z are connected between adjacent two bearing plates 51, and the battery cell assemblies 6 are arranged in the cavity surrounded by the bearing plates 51 and the second constraint plates 52. The at least two battery cell assemblies 6 are arranged along the first direction X, each battery cell assembly 7 comprises at least two battery cells 7 arranged along a second direction Y, the heat exchange element 8 passes through the plurality of bearing plates 51 along the first direction X to be arranged in the at least two battery cell assemblies 6, and the heat exchange element 8 is clamped between adjacent two battery cells 7. Two pressure relief channels 522 and a pressure relief opening 523 in communication with the pressure relief channels 522 are arranged in the second constraint plate 52 between adjacent two battery cell assemblies 6 along the third direction Z, and the pressure relief opening 523 covers the outer periphery of the pressure relief mechanism 71 of the battery cell 7. The busbar 9 in the battery cell assembly 6 passes through the heat exchange element 8 to electrically connect the at least two battery cells 7 in the battery cell assembly 6.

[0113] In the above structure, since the heat exchange element 8 passes through the at least two battery cell assemblies 6 along the first direction X and is connected with the at least two battery cell assemblies 6 arranged along the first direction X, the at least two battery cell assemblies 6 arranged along the first direction X can be more firmly connected together, which is beneficial to improve the structural strength of the battery device 2.

[0114] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: At least two battery cell assemblies are arranged along a first direction, and each battery cell assembly includes at least two battery cells arranged along a second direction perpendicular to the first direction; A heat exchanger exchanges heat with the battery cells, the heat exchanger being disposed along the first direction through at least two of the battery cell assemblies and connected to at least two of the battery cell assemblies arranged along the first direction.

2. The battery device according to claim 1, characterized in that, The battery device further includes a housing, which includes a plurality of support plates spaced apart along the first direction. At least two second constraint plates are spaced apart along a third direction between two adjacent support plates. The second constraint plates are connected between two adjacent support plates. The battery cell assembly is disposed in the cavity formed by the support plates and the second constraint plates. The third direction, the second direction and the first direction are perpendicular to each other. The heat exchanger passes through the plurality of support plates sequentially along the first direction.

3. The battery device according to claim 2, characterized in that, The second constraint plate is provided with a ventilation channel, which penetrates the second constraint plate along the second direction.

4. The battery device according to any one of claims 2 or 3, characterized in that, The two adjacent second constraint plates along the first direction are integrally formed structures.

5. The battery device according to any one of claims 2-4, characterized in that, The housing also includes two third constraint plates arranged opposite each other along the second direction. The third constraint plates are connected to the outer side of the plurality of bearing plates in the second direction, and the third constraint plates are connected to the outer side of the plurality of second constraint plates in the second direction.

6. The battery device according to any one of claims 2-5, characterized in that, The battery cell assembly has a pressure relief channel and a pressure relief opening on at least one of the second constraint plates on both sides of the third direction. The pressure relief opening is connected to the pressure relief channel. The pressure relief channel passes through the second constraint plate along the second direction. The pressure relief opening is connected to the pressure relief mechanism of the battery cell.

7. The battery device according to claim 6, characterized in that, Two pressure relief channels are provided in the second constraint plate between two adjacent battery cell assemblies in the third direction. The two pressure relief channels are arranged at intervals along the third direction. The two pressure relief channels are respectively connected to the pressure relief mechanism of the battery cell in the two adjacent battery cell assemblies in the third direction through the pressure relief opening.

8. The battery device according to claim 6 or 7, characterized in that, The pressure relief mechanism is located on the side of the battery cell facing the second constraint plate, and the pressure relief opening is located on the outer periphery of the pressure relief mechanism.

9. The battery device according to any one of claims 6-8, characterized in that, The heat exchanger is sandwiched between the battery cell and the second constraint plate. The pressure relief mechanism is located on the side of the battery cell facing the heat exchanger. The heat exchanger has a third through hole extending along the third direction. The pressure relief opening is connected to the pressure relief mechanism through the third through hole.

10. The battery device according to any one of claims 1-8, characterized in that, The battery cell assembly further includes a busbar component, the heat exchanger is sandwiched between two adjacent battery cells, the heat exchanger has a second through hole extending along the second direction, and the busbar component passes through the second through hole to electrically connect at least two battery cells in the battery cell assembly.

11. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1-10, the battery device being used to provide electrical energy.

Images