Battery device, energy storage device and power utilization device

Abstract

The utility model belongs to the technical field of batteries, and provides a battery device, an energy storage device and a power utilization device.The battery device comprises a battery monomer assembly, a diaphragm, an electric connecting piece, a weight stack and a pressing piece; the battery monomer assembly comprises a plurality of battery monomers arranged in an array; the diaphragm is attached to the surface of one side, provided with the terminal, of the battery monomer assembly, and at least shields gaps among the battery monomers; the electric connecting piece is arranged on the diaphragm and is electrically connected with the terminal, and the area, without the electric connecting piece, of the battery monomer assembly is a vacant area; the weight stack is located in the vacant area and attached to the membrane. The pressing piece is arranged in the vacant area in a pressing mode. The utility model aims to reduce the possibility that glue enters gaps among battery monomers and protect the battery monomers from being damaged.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of batteries, and particularly relates to a battery device, an energy storage device and a power utilization device. BACKGROUND

[0002] With the rise of new energy equipment represented by new energy vehicles, a battery device has become a key power source. The battery device comprises a plurality of battery monomers arranged in sequence and forming a battery monomer assembly. An electrical connection integrated module is usually arranged on the battery monomer assembly, which comprises a covering film. The film is used to strengthen the integrity and plays a certain insulation role. The film can also cover the gap between the battery monomers. A pressing strip is also arranged on the battery monomer assembly to increase the integrity. When the pressing strip is arranged, glue is first applied to the position to be pressed of the film, and then the pressing strip is pressed to the corresponding position to achieve bonding. However, the film is thin when it is delivered, and is prone to deformation such as warping and folding. It may not be able to completely cover the gap between the battery monomers. When the pressing strip presses the film, the glue may enter the gap between the battery monomers. When the glue expands, the battery monomers may be damaged. CONTENT OF THE UTILITY MODEL

[0003] In view of the above problems, the application provides a battery device, an energy storage device and a power utilization device, which aims to reduce the possibility of glue entering the gap between the battery monomers and protect the battery monomers from being damaged.

[0004] To solve the above problems, in a first aspect, the application provides a battery device, comprising:

[0005] a battery monomer assembly comprising a plurality of arrayed battery monomers;

[0006] a film piece attached to one side surface of the battery monomer assembly having a terminal, the film piece at least shielding the gap between the battery monomers;

[0007] an electrical connection piece arranged on the film piece and electrically connected to the terminal, the area of the battery monomer assembly where the electrical connection piece is not arranged being a vacant area;

[0008] a counterweight piece located in the vacant area and attached to the film piece; and

[0009] a pressing piece arranged in the vacant area.

[0010] The effect of the embodiment is that the counterweight piece is arranged on the film piece in the vacant area, the film piece is pressed flat, the gap between the battery monomers is fully covered, the risk of glue flowing into the gap between the battery monomers is reduced, and the possibility of the battery monomers being damaged is reduced.

[0011] In one embodiment of the first aspect, the shape of the weight piece is matched with the shape of the membrane piece in the empty area.

[0012] The effect of the embodiment is that the shape of the membrane piece in the empty area is able to cover the gap between the battery monomers, and can be slightly larger than the width and length of the gap, so as to cover the gap and save the amount and weight of the membrane piece. Since the shape of the weight piece is matched with the shape of the membrane piece in the empty area, the amount and weight of the weight piece are also saved.

[0013] In one embodiment of the first aspect, the membrane piece in the empty area is arranged at least along the extension direction of the gap between the battery monomers to cover the gap. In this way, complete coverage of the gap is achieved.

[0014] In one embodiment of the first aspect, the shape of the membrane piece in the empty area comprises a linear part and a tooth-shaped part, the tooth-shaped part is connected to at least one side of the linear part and arranged in sequence along the length direction of the linear part, the linear part is used at least to cover the gap between the battery monomers in the adjacent row, and the tooth-shaped part is used to cover the gap between the battery monomers in the same row. The effect of the embodiment is to provide a specific shape of the membrane piece in the empty area, which can be matched with the extension form of the gap and completely and comprehensively cover the gap.

[0015] In one embodiment of the first aspect, the membrane piece, the weight piece, and the electrical connector form an integrated module of the electrical connection structure of the battery monomer assembly, and the membrane piece supports the weight piece and the electrical connector. The integrated module of the electrical connection structure provided by the embodiment is in the form of an integrated whole structure, which strengthens the integrated effect and has the weight piece, so as to press the membrane piece and prevent foreign matters such as glue from entering the gap of the battery monomer. The membrane piece plays a supporting role and also has an insulating effect.

[0016] In one embodiment of the first aspect, the electrical connector comprises:

[0017] The membrane piece is provided with a hole for exposing the terminal, and the terminal is exposed to the hole and electrically connected to the pad;

[0018] The integrated wire harness is pressed on the membrane piece and electrically connected to the pad; and

[0019] The connector is electrically connected to one end of the integrated wire harness. The effect is that the hole on the membrane piece facilitates the connection of the pad and the terminal, the integrated wire harness is pressed on the membrane piece, the membrane piece plays a supporting and insulating effect, and since the integrated wire harness is pressed, the membrane piece is relatively flat and is attached to the surface of the battery monomer assembly.

[0020] In one embodiment of the first aspect, the weight piece and the membrane piece are bonded to each other. The effect of this embodiment is that the membrane piece is used to cover the gap, and the weight piece is used to press against the upper surface of the membrane piece. In order to prevent dislocation between the two, the two are bonded.

[0021] In one embodiment of the first aspect, the battery cell assembly comprises at least two rows of battery cells, and each row of battery cells is provided with a corresponding electrical connector;

[0022] The vacant area is an area between adjacent electrical connectors;

[0023] And / or, the vacant area is an area on one side of the electrical connector on the edge of one row of battery cells, away from the adjacent row of battery cells.

[0024] This embodiment provides a specific location of the vacant area, and the vacant areas are uniformly distributed, so that the battery cell assembly and the membrane piece structure are reasonably symmetrical. When the vacant area is provided with a pressing member, the battery cell assembly can maintain symmetry.

[0025] In one embodiment of the first aspect, the battery cell assembly comprises a single row of battery cells and is provided with the electrical connector;

[0026] The vacant area is an area on the side of the electrical connector close to the edge of the battery cell. This embodiment also makes the overall structure of the battery cell assembly symmetrical.

[0027] In one embodiment of the first aspect, the vacant area of the weight piece is bonded to the pressing member. The effect of this embodiment is that the form of bonding enhances the stability of the pressing member.

[0028] In one embodiment of the first aspect, one or more of a positioning protrusion, a positioning hole, and a positioning groove are provided on the weight piece. The effect of this embodiment is that the positioning protrusion, the positioning hole, and the positioning groove can be cooperated with the installation equipment to position the weight piece on the membrane piece, thereby improving work efficiency and ensuring the accuracy of the pressing position.

[0029] In one embodiment of the first aspect, the pressing member comprises:

[0030] A pressing strip, which is matched with the shape of the vacant area, is used to bond to the vacant area and press the weight piece; and

[0031] A steel strip connected to one side of the pressing strip away from the vacant area, and the battery device further comprises a box body, and the end of the steel strip is used to connect a fixing member in the box body. The effect of this embodiment is that the provided pressing member can increase the overall effect of the battery cells, and can maintain a certain stability when placed in the box body.

[0032] In a second aspect, the application also provides an embodiment of an energy storage device, comprising the battery device provided by any of the above embodiments, wherein the battery device is used for storing or providing electric energy.

[0033] In a third aspect, the application also provides an embodiment of an electric device, comprising the battery device or the energy storage device as described above.

[0034] The above description is only a summary of the technical solutions of the application. In order to make the technical means of the application more clear, the 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 application more obvious and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0035] 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. The accompanying drawings are included to provide a description of the preferred embodiments and are not meant to limit the present application. Moreover, the same reference numerals in the drawings indicate the same elements. In the drawings:

[0036] Figure 1 Structure diagram of a vehicle for some embodiments of the application;

[0037] Figure 2 Structure diagram of a battery device provided by some embodiments of the application;

[0038] Figure 3 Structure diagram of a battery cell assembly, an electrical connector, a diaphragm, a counterweight and a pressing member provided by some embodiments of the application;

[0039] Figure 4 Structure diagram of a battery cell assembly, an electrical connector, a diaphragm, a counterweight and a pressing member provided by some embodiments of the application; Figure 3 Enlarged structure diagram of A in FIG. 8;

[0040] Figure 5 Enlarged structure diagram of B in FIG. 8; Figure 3 Top view of the structure after assembly in FIG. 8;

[0041] Figure 6 Top view of the structure after assembly in FIG. 8;

[0042] Figure 7 Enlarged structure diagram of C in FIG. 8; Figure 6 Enlarged structure diagram of A in FIG. 8;

[0043] Figure 8 Enlarged structure diagram of B in FIG. 8; Figure 6 Enlarged structure diagram of C in FIG. 8;

[0044] Figure 9 Enlarged structure diagram of C in FIG. 8;Figure 6 The schematic diagram of the explosion structure of the middle diaphragm, the electrical connecting piece and the counterweight piece.

[0045] The reference signs in the detailed description are as follows:

[0046] 1000, vehicle;

[0047] 100, battery device; 200, controller; 300, motor;

[0048] 10, box body; 11, battery monomer assembly; 12, battery monomer; 13, diaphragm; 14, hole; 15, positioning hole; 16, electrical connecting piece; 161, baffle; 162, integrated wire harness; 163, connector; 17, counterweight piece; 18, empty area; 19, pressing piece; 191, pressing strip; 192, steel belt. DETAILED DESCRIPTION

[0049] The embodiments of the technical scheme of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0050] Unless otherwise defined, 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 terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0051] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0052] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0053] In the description of the embodiments of the present application, the term "and / or" is only to describe the relationship between the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are an "or" relationship.

[0054] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0055] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0056] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0057] 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 supply system of hydropower, thermal power, wind power and solar power station, but also widely applied to electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of battery, the demand of its market is also increasing.

[0058] The battery device is a complete structural whole, including a box body, a plurality of battery monomers are arranged in the box body, and in some special scenes, a battery monomer can also be arranged in the box body. When the battery monomers are multiple, the same row of battery monomers can form a battery monomer assembly.

[0059] The battery apparatus mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells connected in series, in parallel, or in a mixed connection of series and parallel connection.

[0060] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells.

[0061] As an example, the battery cell assembly can be a battery module formed by arranging and fixing a plurality of battery cells into a separate module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0062] In some embodiments, the battery apparatus can be a battery pack including a case and one or more battery cell assemblies housed in the case.

[0063] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the case by fixing the battery module in the case.

[0064] As an example, the battery cell assembly can also be housed in the case by directly fixing a plurality of battery cells in the case.

[0065] As an example, the case can include a first case and a second case. The first case and the second case are coupled so that an enclosed space is formed inside the case to accommodate the battery cell assembly. Here, the enclosed means covered or closed, which can be sealed or unsealed. The first case can be a top cover or a bottom plate.

[0066] As an example, the case can include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame so that an enclosed space is formed inside the case to accommodate the battery cell assembly.

[0067] In some embodiments, the case can be a part of a chassis structure of a vehicle. For example, a part of the case can be at least a part of a floor of the vehicle, or a part of the case can be at least a part of a cross beam and a longitudinal beam of the vehicle.

[0068] The battery cell assembly needs to input and output current and also can input and output low-voltage signals, the plurality of battery cells of the battery cell assembly are oriented to the same side, that is, the terminals of the battery cells are oriented to the same side, and specifically can be located at the upper end, a covering diaphragm is arranged on the battery cell assembly, the covering diaphragm is used for supporting and insulating, and the integrity can be enhanced.

[0069] Another function of the diaphragm is to cover the gap between the battery cells, the plurality of battery cells of the single battery cell assembly are arranged in an array, there is a gap between adjacent battery cells or adjacent rows of battery cells, in order to reduce the amount of diaphragm, a strip-shaped or other shape that matches the gap can be used and arranged along the extension direction of the gap, since the diaphragm is thin, when the diaphragm is warped and folded, the gap cannot be fully covered. In some cases, a pressing strip is needed to be pressed on the battery cell assembly and press against the diaphragm to enhance the integrity of the battery cell assembly. The pressing strip is bonded to the battery cell assembly in the form of glue dispensing, that is, the glue is first dispensed on the battery cell assembly, and then the pressing strip is pressed to achieve bonding. If the diaphragm does not fully cover the gap, when the pressing strip presses against the diaphragm, the glue may flow into the gap and solidify in the gap, which may cause damage to the battery cell due to vibration, battery cell expansion, glue expansion and the like in the later use process.

[0070] Based on the above considerations, as Figure 2 The embodiment of the application provides a battery device 100, which aims to solve the above problems to some extent.

[0071] The embodiment of the application also provides a power consumption device 1000 with the battery device 100 provided by the above embodiment, that is, a power consumption device 1000 using the battery device 100 as a power supply.

[0072] The technical solutions described in the embodiments of the application are applicable to various power consumption devices using the battery device 100, wherein the power consumption device can be a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy and 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 and a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, for example, a game machine, an electric automobile toy, an electric ship toy and 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, for example, an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator and an electric planer, etc. The embodiments of the application do not specially limit the above power consumption devices.

[0073] The battery device 100 disclosed by the embodiments of the present application can be used in an electric device such as a vehicle, a ship or an aircraft, but is not limited thereto. The electric device can use a power supply system provided with the battery device 100 disclosed by the present application, which is beneficial to improve the use reliability of the electric device.

[0074] The following embodiments are described by taking the electric device 1000 provided by the embodiments of the present application as a vehicle for example for convenience of description.

[0075] Please refer to Figure 1 , Figure 1 The structural schematic diagram of the vehicle 1000 provided by some embodiments of the present application is shown in FIG. 1. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or a range extended vehicle. The vehicle 1000 is internally provided with the battery device 100, which can be arranged at the bottom, the head or the tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as the operating power supply of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power demand of the vehicle 1000 during starting, navigation and driving.

[0076] In some embodiments of the present application, the battery device 100 can not only be used as the operating power supply of the vehicle 1000, but also be used as the driving power supply of the vehicle 1000, to replace or partially replace the fuel or natural gas to provide driving power for the vehicle 1000.

[0077] Please refer to Figures 3-9 The battery device 100 provided by the embodiments of the present application includes a battery monomer assembly 11, a diaphragm 13, an electrical connector 16, a counterweight sheet 17 and a pressing member 19.

[0078] The battery monomer assembly 11 includes a plurality of battery monomers 12 arranged in an array; the diaphragm 13 is attached to one side surface of the battery monomer assembly 11 having a terminal, and the diaphragm 13 at least shields the gap between the battery monomers 12; the electrical connector 16 is arranged on the diaphragm 13 and electrically connected to the terminal; the region of the battery monomer assembly 11 where the electrical connector 16 is not arranged is an empty region 18; the counterweight sheet 17 is located in the empty region 18 and attached to the diaphragm 13; and the pressing member 19 is arranged in the empty region 18.

[0079] The battery device 100 can further include a box body 10, and a plurality of battery monomers 12 are arranged inside the box body 10. The plurality of battery monomers 12 can be arranged in the form of multiple rows and multiple columns, and the plurality of battery monomers 12 can form the battery monomer assembly 11.

[0080] In some embodiments, the battery cells 12 of the battery cell assembly 11 can be oriented in the same direction, that is, the terminals of the battery cells 12 are located on the same side, and in other embodiments, the battery cells 12 of the battery cell assembly 11 can be oriented in different directions, that is, the terminals of the battery cells 12 are located on different sides. In this embodiment, the battery cells 12 of the battery cell assembly 11 are oriented in the same direction, and the terminals are located on the top surface. The membrane 13 is arranged on the top surface of the battery cell assembly 11.

[0081] The battery cell assembly 11 needs to input and output current and collect low-voltage signals, so this embodiment provides an electrical connector 16 arranged on the side of the battery cell assembly 11 where the terminals are arranged, which is electrically connected to the terminals on the battery cell assembly 11. The terminals include positive and negative terminals. The electrical connector 16 can be arranged on the membrane 13, and the terminals can be exposed to the membrane 13. The membrane 13 can be formed with a hole 14 to avoid the terminals, so that the terminals are exposed, which can connect the electrical connector 16.

[0082] The electrical connector 16 occupies part of the space on the surface of the battery cell assembly 11, and part of the space is not occupied. For example, a set of electrical connectors 16 is arranged corresponding to each row of battery cells 12, but the electrical connectors 16 cannot occupy the entire space, especially the space between adjacent rows of battery cells 12 forms a vacant area 18, or the single row of battery cells 12 at the edge has part of the vacant area 18 away from the adjacent row of battery cells 12. The vacant area 18 is still provided with a membrane 13, which is used to shield the gap between the battery cells 12. When the membrane 13 is warped, it is difficult to completely cover the gap, especially when the membrane 13 is not a whole piece but in the form of a strip covering the gap, it is more likely to occur. Incomplete coverage.

[0083] The pressing member 19 is used to press at the vacant area 18, so as to increase the overall strength of the battery cell assembly 11. The pressing member 19 can be bonded to the vacant area 18 by glue, of course, on the basis of bonding, it is also not excluded that other connecting members are used to assist connection.

[0084] The counterweight sheet 17 in this embodiment is arranged at the vacant area 18 and is used to press on the membrane 13, which prevents the membrane 13 from warping and bending, so that it can completely cover the gap between the battery cells 12. After the counterweight sheet 17 presses the membrane 13, glue is applied to the vacant area 18, and the glue will not flow into the gap between the battery cells 12. Then the pressing member 19 is arranged, and the counterweight sheet 17 is pressed together.

[0085] The effect of the embodiment is that, since the counterweight sheet 17 is arranged on the membrane sheet 13 in the empty area 18, the membrane sheet 13 is flattened to sufficiently cover the gap between the battery monomers 12, the risk of glue flowing to the gap between the battery monomers 12 is reduced, and the possibility of damage to the battery monomers 12 is reduced.

[0086] In some embodiments, as Figure 3 , Figure 4 , Figure 6 and Figure 8 , the shape of the counterweight sheet 17 is matched and aligned with the shape of the membrane sheet 13 in the empty area 18.

[0087] Specifically, the shape of the membrane sheet 13 in the empty area 18 is designed to cover the gap between the battery monomers 12, which can be slightly larger than the width and length of the gap, so as to cover the gap and save the amount and weight of the membrane sheet 13. Since the shape of the counterweight sheet 17 is matched with the shape of the membrane sheet 13 in the empty area 18, the amount and weight of the counterweight sheet 17 are also saved. The matching means that the shape of the counterweight sheet 17 is the same as the shape of the membrane sheet 13 in the empty area 18, and when the counterweight sheet 17 presses the membrane sheet 13, it is aligned vertically, that is, it is aligned and attached. This can uniformly press the membrane sheet 13 everywhere, avoid warping, maintain the sealing of the gap, and also save the amount and weight of the counterweight sheet 17.

[0088] In some embodiments, the membrane sheet 13 in the empty area 18 is arranged at least along the extension direction of the gap between the battery monomers 12 to cover the gap. For reference Figure 6 and Figure 8 , Figure 6 and Figure 8 , the shape of the membrane sheet 13 in the empty area 18 is aligned with the shape of the counterweight sheet 17. The shape of the membrane sheet 13 in the empty area 18 can be known according to the shape of the counterweight sheet 17 in the figure.

[0089] Specifically, in order to fully cover the gap, the embodiment provides that the membrane sheet 13 is arranged at least along the extension direction of the gap, for example, when the battery monomers 12 are square, the gap is distributed in a straight line form, and there is an intersection, so the membrane sheet 13 also adopts a matching form, so as to achieve full coverage.

[0090] In some embodiments, as Figure 9 , the shape of the membrane sheet 13 in the empty area 18 includes a linear part and a tooth-shaped part, the tooth-shaped part is connected to at least one side of the linear part and arranged in sequence along the length direction of the linear part, the linear part is used at least to cover the gap between the adjacent rows of battery monomers 12, and the tooth-shaped part is used to cover the gap between the battery monomers 12 in the same row.

[0091] It should be noted that Figure 9The diaphragm 13 in the empty area 18 is attached to the counterweight sheet 17, so the diaphragm 13 in the empty area 18 is not shown in the figure. Since the counterweight sheet 17 is aligned with the diaphragm 13 in the empty area 18, the shape of the diaphragm 13 in the empty area 18 can be determined according to the shape of the counterweight sheet 17. Figure 9 The shape of the diaphragm 13 in the empty area 18 can be determined according to the shape of the counterweight sheet 17, Figure 3 , Figure 4 , Figure 6 and Figure 8 The same is true for the present embodiment, which can also refer to Figure 3 , Figure 4 , Figure 6 and Figure 8 .

[0092] The shape of the diaphragm 13 in the empty area 18 can be adapted to the shape of the gap. When the battery monomer 12 is square, the plurality of battery monomers 12 of the battery monomer assembly 11 are arranged in an array, i.e. arranged in multiple rows and multiple columns. A gap is formed between adjacent rows of battery monomers 12, and a gap is also formed between adjacent battery monomers 12 in the same row. Based on this, the present embodiment provides a diaphragm 13 in the empty area 18, which includes a linear portion and a tooth-shaped portion. The linear portion is relatively long and can be used to cover the gap between adjacent rows of battery monomers 12, while the tooth-shaped portion is relatively short and is used to cover the gap between adjacent battery monomers 12 in the same row. A gap is formed between two rows of battery monomers 12, and on both sides of the gap are gaps between adjacent battery monomers 12 in each row. At this time, the diaphragm 13 in the empty area 18 can be provided with tooth-shaped portions on both sides of the linear portion to adapt to the shape of the gap. It can be understood that the linear portion and the tooth-shaped portion form a comb structure or a fence structure.

[0093] In some cases, when the linear portion is provided with a tooth-shaped portion on only one side, the diaphragm 13 can be arranged on the side of the edge row of battery monomers 12 away from the adjacent row of battery monomers 12. The linear portion is arranged at the edge of the row of battery monomers 12, and the tooth-shaped portion covers the gap between the battery monomers 12 in the row. Of course, when the linear portion is provided with a tooth-shaped portion on only one side, it can also be arranged at the empty area 18 between the adjacent rows of battery monomers 12. At this time, two diaphragms 13 of this shape can be used in a back-to-back manner to jointly cover the gap.

[0094] It should be noted that the tooth-shaped portion is arranged along the length direction of the linear portion, and the distance between adjacent tooth-shaped portions is equal to the distance between adjacent gaps in the same row of battery monomers 12.

[0095] The effect of the present embodiment is to provide a specific shape of the diaphragm 13 in the empty area 18, which can be adapted to the extension form of the gap and completely cover the gap.

[0096] Reference can be made to Figure 9 In the non-empty area, the film 13 can adopt a sheet structure, which can completely separate the electrical connecting member 16 from the surface of the battery monomer assembly 11, and has a good insulation effect. Of course, the hole 14 is reserved for the exposure of the terminal to connect the electrical connecting member 16.

[0097] In some embodiments, as Figure 9 The film 13, the counterweight sheet 17 and the electrical connecting member 16 form an integrated module of the electrical connecting structure of the battery monomer assembly 11; the film 13 supports the counterweight sheet 17 and the electrical connecting member 16.

[0098] The integrated module of the electrical connecting structure provided by the embodiment is an integrated whole structure, which strengthens the integrated effect, and has the counterweight sheet 17, which can press the film 13 to prevent foreign matters such as glue from entering the gap of the battery monomer 12. The film 13 plays a supporting role and has an insulation effect.

[0099] In some embodiments, as Figures 3-8 The electrical connecting member 16 includes the bar 161, the integrated wire harness 162 and the connector 163. The film 13 is provided with the hole 14 for exposing the terminal, and the terminal is exposed to the hole 14 and electrically connected to the bar 161; the integrated wire harness 162 is pressed on the film 13 and electrically connected to the bar 161; and the connector 163 is electrically connected to one end of the integrated wire harness 162.

[0100] The electrical connecting member 16 includes the bar 161 electrically connected to the terminal of the battery monomer 12, the integrated wire harness 162 electrically connected to the bar 161 and the connector 163 electrically connected to the integrated wire harness 162. The positive and negative terminals of each battery monomer 12 are electrically connected to the integrated wire harness 162 through the bar 161, and the hole 14 is used to avoid the terminal.

[0101] Specifically, the electrical connecting member 16 includes a low-voltage connecting part and a high-voltage connecting part, and can perform high-voltage connection of current input and output through the bar 161, and can also perform low-voltage connection of signal input and output. The integrated wire harness 162 is electrically connected between the bar 161 and the connector 163, and the connector 163 can be connected to other signal input or output devices, external power supply circuits, external power consumption devices, etc. Alternatively, the bars 161 connected by each row of battery monomers 12 are connected to the same linear integrated wire harness 162, which spans the area between the positive and negative terminals of the row of battery monomers 12, and is connected to the connector 163 at the end position of the whole row of battery monomers 12.

[0102] The hole 14 on the membrane 13 facilitates the connection of the terminal with the tab 161, and the integrated wire harness 162 is pressed on the membrane 13, which plays a supporting and insulating effect, and due to the pressing of the integrated wire harness 162, the membrane 13 is relatively flat and is attached to the surface of the battery monomer assembly 11.

[0103] In some embodiments, the weight sheet 17 comprises one or both of a polycarbonate plate and a glass fiber reinforced epoxy plate.

[0104] The polycarbonate plate, also known as PC plate, has the characteristics of high transparency, impact resistance, sound insulation, heat insulation, flame resistance, and aging resistance, and has good stability in the battery device 100 and does not react with other materials. And it has good structural strength and is not easy to warp, and can be well pressed on the surface of the membrane 13, keeping the membrane 13 flat, thereby well covering the gap between the battery monomers 12. The glass fiber reinforced epoxy plate also has the above effects.

[0105] In some embodiments, the weight sheet 17 and the membrane 13 are bonded to each other.

[0106] Specifically, the membrane 13 is used to cover the gap, and the weight sheet 17 is used to press on the upper surface of the membrane 13. In order to prevent dislocation between the two, the two are bonded. The specific bonding means is to set the back glue on the lower surface of the weight sheet 17 or on the upper surface of the membrane 13 to make the two adhere, or in some cases, back glue can also be set on both of them to increase the firmness. Because the weight sheet 17 has a certain strength and hardness, and the mass is larger than that of the membrane 13, it can be stably pressed.

[0107] In some embodiments, as Figures 3-6 , the battery monomer assembly 11 comprises at least two rows of battery monomers 12, and each row of battery monomers 12 is provided with a corresponding electrical connector 16;

[0108] The vacant area 18 is the area between adjacent electrical connectors 16;

[0109] And / or, the vacant area 18 is the area on one side of the electrical connector 16 on the row of battery monomers 12 located at the edge away from the adjacent row of battery monomers 12.

[0110] Specifically, the battery monomer assembly 11 includes a plurality of battery monomers 12 arranged in sequence, which can be multiple rows and multiple columns or a single row. In order to facilitate electrical connection, the present embodiment takes a single row of battery monomers 12 as an electrical connection unit, and one battery monomer assembly 11 includes at least one electrical connection unit. Each row of battery monomers 12 is provided with an electrical connection piece 16, which facilitates electrical connection and makes the electrical connection arrangement neat. The electrical connection piece 16 covers a certain area on the single row of battery monomers 12. In the present embodiment, the electrical connection piece 16 is arranged on the single row of battery monomers 12 along the arrangement direction of the plurality of battery monomers 12 and is located at the middle position. The middle position refers to the arrangement direction of the single row of battery monomers 12 as the first direction, the electrical connection piece 16 is arranged along the first direction, and the direction perpendicular to the first direction on the same side of the battery monomer 12 is the second direction. In the second direction, the electrical connection piece 16 is located at the middle position of the battery monomer 12. Thus, on the single row of battery monomers 12 and on both sides of the electrical connection piece 16, there will be a vacant area 18 without the electrical connection piece 16. Therefore, when there are multiple rows of battery monomers 12, the vacant area 18 is formed between adjacent electrical connection pieces 16, and the area on the edge row of battery monomers 12 away from the adjacent row of battery monomers 12, i.e., the area on the electrical connection piece 16 of the row of battery monomers 12 away from the adjacent row of battery monomers 12, is also the vacant area 18.

[0111] The present embodiment provides the specific position of the vacant area 18, which is uniformly distributed, so that the battery monomer assembly 11 and the diaphragm 13 structure are reasonable and symmetrical. When the pressing piece 19 is arranged in the vacant area 18, the battery monomer assembly 11 can maintain symmetry.

[0112] In some embodiments, the battery monomer assembly 11 includes a single row of battery monomers 12 and the electrical connection piece 16, and the vacant area 18 is the area near the edge of the battery monomer 12 on the side of the electrical connection piece 16.

[0113] Specifically, when the battery monomer assembly 11 is a single row of battery monomers 12, the vacant area 18 is the area near the edge of the battery monomer 12 on the side of the electrical connection piece 16. At this time, the electrical connection piece 16 is also arranged at the middle position of the single row of battery monomers 12, so that the vacant area 18 is formed on both sides. When the pressing piece 19 is arranged on both sides, it is arranged in a symmetrical form, so that the overall structure of the battery monomer assembly 11 remains symmetrical.

[0114] In some embodiments, the vacant area 18 where the counterweight piece 17 is arranged is bonded with the pressing piece 19.

[0115] The glue can be uniformly distributed in the empty area 18 by the dispensing machine. Compared with other forms of bonding, the dispensing form can uniformly bond the compression member 19 to the empty area 18, so that the bonding effect of the compression member 19 is good, and the problem of insufficient local bonding force does not occur. At the same time, due to the compression of the counterweight piece 17 on the membrane 13 of the empty area 18, the membrane 13 can reliably cover the gap between the battery monomers 12. The glue will not flow into the gap between the battery monomers 12 during dispensing, thereby avoiding damage to the battery monomers 12.

[0116] In some embodiments, as Figure 6 and Figure 7 , the counterweight piece 17 is provided with one or more of the positioning protrusions, positioning holes 15, and positioning grooves.

[0117] Specifically, the battery device 100 can be installed or disassembled by an automatic installation device. In order to enable the counterweight piece 17 to also be installed by the automatic installation device, that is, the counterweight piece 17 is attached to the membrane 13 by the automatic installation device, the counterweight piece 17 provided in the embodiment is provided with some positioning structures for cooperating with the structures on the installation device to be positioned, so that it can be accurately positioned and attached to the membrane 13 under the driving of the installation device.

[0118] Specifically, the positioning structure can be one or more of the positioning protrusions, the positioning holes 15, and the positioning grooves. The positioning protrusions can cooperate with the holes on the installation device, the positioning holes 15 can cooperate with the positioning columns on the installation device, the positioning grooves can cooperate with the protrusions on the installation device, and the like. That is, the counterweight piece 17 is installed and positioned at a specific position of the installation device, and then the counterweight piece 17 can be accurately attached to the membrane 13 by means of the installation device.

[0119] The effect of the embodiment is that the counterweight piece 17 can be positioned in cooperation with the installation device and attached to the membrane 13 by means of the installation device, thereby improving the work efficiency and the compression position is accurate.

[0120] In some embodiments, as Figures 3-5 , the compression member 19 includes a compression strip 191 and a steel band 192.

[0121] The compression strip 191 is shaped to match the empty area 18, and is used to bond the empty area 18 and compress the counterweight piece 17; and

[0122] The steel band 192 is connected to the side of the compression strip 191 away from the empty area 18, and the battery device 100 further includes a box body 10, and the end of the steel band 192 is used to connect a fixing member in the box body 10.

[0123] Specifically, the compression member 19 includes a compression strip 191 and a steel band 192. The compression strip 191 can be long strip-shaped, and the bottom surface of the compression strip 191 can be shaped to match the shape of the empty area 18, and is just compressed at the empty area 18 to cover the entire empty area 18. After the dispensing is completed, the compression strip 191 is compressed at the empty area 18 to achieve firm bonding. The compression strip 191 serves to arrange the battery monomers 12 compactly and neatly, and the steel band 192 cooperates with the compression strip 191 to reinforce the battery monomer assembly 11 as a whole.

[0124] The compression strip 191 can be U-shaped in cross section in the length direction, which can increase the tightening effect of the compression strip 191, and the steel band 192 can be arranged in the groove of the U-shaped compression strip 191. The steel band 192 is also long strip-shaped, and is arranged in the groove of the U-shaped compression strip 191, with its two sides fitted to the inner walls of the groove, its bottom fitted to the bottom of the groove, and its top flush with the top of the groove.

[0125] The steel band 192 is connected to the compression strip 191 to form an integral structure, which can be connected by clamping or welding, etc., to reinforce the battery monomer assembly 11. In addition, a connecting structure can be arranged at both ends of the steel band 192, which is used to connect some fixed members in the box body 10, such as columns, beams or plates, etc. A through hole can be arranged at both ends of the steel band 192 for sleeving on the column, etc. When the steel band 192 is connected to some fixed members in the box body 10, the firmness of the battery monomer assembly 11 arranged in the box body 10 is also increased, and the stability is better.

[0126] The application can also provide an energy storage device including the battery device 100 described above, which is used to store or provide electric energy.

[0127] The energy storage device of the embodiment includes one or more battery clusters to improve the voltage and capacity of the energy storage device. The battery cluster can include a plurality of battery devices 100 connected in series by a bus member to improve the voltage of the energy storage device. When the energy storage device includes a plurality of battery clusters, the plurality of battery clusters are connected in parallel to improve the capacity of the energy storage device.

[0128] The energy storage device can be used in energy storage power stations, wind power systems, solar power systems, mobile power systems or temporary power supply systems, etc. The energy storage device can store electric energy as needed and output electric energy at appropriate times. For example, the energy storage device can store electric energy during the low electricity consumption period, and provide electric energy for related users or electric equipment during the peak electricity consumption period.

[0129] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0130] In some embodiments, the energy storage device can include a cabinet and one or more battery clusters, the battery clusters being housed in the cabinet.

[0131] In some embodiments, the energy storage device can include a thermal management module, a master control module, a general control module, a power distribution module, a fire control module, and the like.

[0132] As an example, the thermal management module can include a liquid cooling unit that provides cooling liquid to each battery device 100 through a pipeline for adjusting the temperature of the battery monomer.

[0133] As an example, the master control module can serve as a battery management unit of the battery cluster for monitoring and managing the battery cluster. The master control module can monitor information such as current, voltage, power, or temperature of the battery cluster. For example, the charging and discharging current, voltage, and the like of the battery cluster can be controlled. The master control module includes a slave battery management unit SBMU (Slave Battery Management Unit, SBMU), a fusion switch, and the like.

[0134] As an example, the general control module can serve as a battery management unit of the energy storage device for monitoring and managing the energy storage device. The general control module can monitor information such as current, voltage, power, state of charge, or temperature of the energy storage device. For example, the charging and discharging current, voltage, and the like of the energy storage device can be controlled. As an example, the general control module includes an insulation monitoring module IMM (Insulation Monitoring Module, IMM), a master battery management unit MBMU (Master Battery Management Unit, MBMU), an Ethernet ETH (EtherNet, ETH), and an optical fiber conversion module, and the like.

[0135] As an example, the fire control module includes a control panel, a detector, an alarm device, and the like, for detecting, alarming, or extinguishing the energy storage system.

[0136] As an example, the power distribution module can be used to distribute power to the modules that need power in the energy storage device.

[0137] The embodiment also provides an electric device 100, which includes the above-mentioned battery device 100 or the above-mentioned energy storage device.

[0138] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them. Although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced equivalently. Such modifications or replacements do not change the essence of the corresponding technical solutions, which should be covered in the scope of the claims and the specification of the present application. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. 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 by, The battery device comprises: a battery cell assembly comprising a plurality of battery cells arranged in an array; a film sheet attached to a side surface of the battery cell assembly having terminals, the film sheet covering at least the gaps between the battery cells; an electrical connector arranged on the film sheet and electrically connected to the terminals, the area of the battery cell assembly where the electrical connector is not arranged being a vacant area; a weight sheet arranged in the vacant area and attached to the film sheet; and a pressing member arranged in the vacant area. The shape of the weight sheet is adapted to the shape of the film sheet in the vacant area and is attached thereto in alignment.

2. The battery device of claim 1, wherein The film sheet in the vacant area is arranged at least along the extension direction of the gaps between the battery cells to cover the gaps.

3. The battery device of claim 1, wherein The shape of the film sheet in the vacant area comprises a linear portion and a tooth-shaped portion, the tooth-shaped portion being connected to at least one side of the linear portion and arranged along the length direction of the linear portion, the linear portion being used at least to cover the gaps between the battery cells in adjacent rows, and the tooth-shaped portion being used to cover the gaps between the battery cells in the same row.

4. The battery device of claim 3, wherein The film sheet, the weight sheet and the electrical connector form an integrated module of the electrical connection structure of the battery cell assembly, and the film sheet supports the weight sheet and the electrical connector.

5. The battery device of claim 1, wherein The electrical connector comprises:

6. The battery device of claim 1, wherein a bar sheet, the film sheet being provided with a hole for exposing the terminals, the terminals being exposed in the hole and electrically connected to the bar sheet; an integrated wiring harness arranged on the film sheet and electrically connected to the bar sheet; and a connector electrically connected to one end of the integrated wiring harness. The weight sheet and the film sheet are attached to each other.

7. The battery device of claim 1, wherein The battery cell assembly comprises at least two rows of battery cells, and each row of battery cells is provided with a corresponding electrical connector.

8. The battery device of any one of claims 1-7, wherein, The vacant area is between adjacent electrical connectors. The vacant area is on one side of the electrical connector of the battery cells in one row away from the battery cells in an adjacent row. The battery cell assembly comprises a single row of battery cells and is provided with the electrical connector.

9. The battery device of any one of claims 1-7, wherein, The vacant area is on the side of the electrical connector close to the edge of the battery cells. The vacant area where the weight sheet is arranged is attached to the pressing member.

10. The battery device of any one of claims 1-7, wherein, The weight sheet is provided with one or more of a positioning protrusion, a positioning hole and a positioning groove.

11. The battery device of any one of claims 1-7, wherein, The pressing member comprises:

12. The battery device of any one of claims 1-7, wherein, a pressing strip adapted to the shape of the vacant area and used to be attached to the vacant area and press the weight sheet; and a steel band connected to one side of the pressing strip away from the vacant area, the battery device further comprising a box, and the end of the steel band being used to be connected to a fixing member in the box. The battery device comprises any one of the battery devices according to claims 1-12, and is used to store or provide electric energy.

13. An energy storage device, characterized by, The battery device comprises any one of the battery devices according to claims 1-12 or the energy storage device according to claim 13.

14. An electrical device, comprising: ​

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