Battery device, electric equipment and vehicle

Abstract

The utility model discloses a battery device, electric equipment and a vehicle, the battery device comprises a battery cell assembly, a power distribution module and a safety piece, and the battery cell assembly comprises a plurality of battery cell modules which are sequentially connected in series; the power distribution module is connected with the battery core assembly; the safety piece is arranged on a series loop of the plurality of battery cells; wherein the power distribution module and the safety piece are positioned on the same side of the battery core assembly. The space utilization rate of the battery device is high.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery device, electrical equipment and a vehicle. Background Art

[0002] At present, electric vehicles have higher and higher requirements for driving mileage. The voltage and power of the entire battery device are relatively high. Therefore, for safety reasons, a fuse is generally set in the battery device to reduce the risk of short circuit of the entire battery device. The battery device is also equipped with a distribution box to distribute and control power to electrical equipment.

[0003] In existing battery devices, considering the weight and cost of the entire battery pack, the fuses and distribution boxes in the battery circuit are usually arranged on both sides of the battery cell assembly in the battery pack, resulting in a larger battery device, low overall integration, and low space utilization of the battery device. Utility Model Content

[0004] The utility model aims to provide a battery device, electrical equipment and a vehicle, so as to solve the problem of low space utilization of the battery device.

[0005] In order to achieve the purpose of the utility model, the utility model provides the following technical solutions:

[0006] In a first aspect, the utility model provides a battery device, comprising:

[0007] A battery cell assembly, comprising a plurality of battery cell modules connected in series;

[0008] A power distribution module connected to the battery cell assembly;

[0009] A safety element, arranged on a series circuit of a plurality of the battery cells;

[0010] Wherein, the power distribution module and the fuse are both located on the same side of the battery cell assembly.

[0011] In one embodiment, the positive electrodes and negative electrodes of the plurality of battery cell modules, the power distribution module and the fuse are all located on the same side of the battery cell assembly in the first direction.

[0012] In one embodiment, the battery cell assembly includes a first battery cell module and a second battery cell module spaced apart in a second direction, the safety component is disposed on a series circuit between the first battery cell module and the second battery cell module, and the first direction intersects with the second direction.

[0013] In one embodiment, the first battery cell module includes a first unit and a second unit spaced apart in the first direction, the first unit includes at least one battery cell module, the second unit includes at least two battery cell modules, the multiple battery cell modules of the second unit are arranged in sequence in the second direction, the first direction and the second direction intersect, and the second unit is arranged on a side of the first unit close to the power distribution module.

[0014] In one embodiment, the positive and negative electrodes of the first unit are arranged on the same side of the first unit close to the power distribution module, and the second unit includes a first module and a second module, the positive electrode of the first module is connected to the negative electrode of the first unit, the negative electrode of the first module is connected to the power distribution module, the positive electrode of the second module is connected to the fuse, and the negative electrode of the second module is connected to the positive electrode of the first unit.

[0015] In one embodiment, the first unit includes a third module and a fourth module, the positive electrode of the first module is connected to the negative electrode of the third module, the negative electrode of the second module is connected to the positive electrode of the fourth module, and the positive electrode of the third module is connected to the negative electrode of the fourth module.

[0016] In one embodiment, the battery cell module includes a plurality of battery cells, the plurality of battery cells are arranged in series, and the plurality of battery cells are arranged at intervals in the second direction;

[0017] Wherein, when the number of the battery cells is 2n, the positive electrode and the negative electrode of the battery cell module are arranged on the same side of the battery cell module in the first direction;

[0018] When the number of the battery cells is 2n+1, the positive electrode and the negative electrode of the battery cell module are arranged on different sides of the battery cell module in the first direction, and n≥1 is a positive integer.

[0019] In one embodiment, the number of battery cells arranged in the first battery cell module in the second direction is the same as the number of battery cells arranged in the second battery cell module in the second direction.

[0020] In one embodiment, in the first battery cell module, a partition beam is provided between two adjacent battery cell modules in the second direction, and the partition beam extends along the first direction.

[0021] In one implementation, the dimension of the partition beam in the second direction is d1, and the dimension of the battery cell in the second direction is d2, satisfying: d1 / d2=m, m≥1 and is a positive integer.

[0022] In one embodiment, the battery device further includes a connector, which is electrically connected to the power distribution module and is disposed on the same side of the battery cell assembly.

[0023] In one embodiment, the safety element is electrically connected to the connector.

[0024] In one embodiment, the safety component is integrated with the power distribution module.

[0025] In one implementation, the safety component and the power distribution module are arranged sequentially in the second direction.

[0026] In a second aspect, the utility model provides an electrical equipment, including an electrical device and a battery device as described in any one of the embodiments of the first aspect, wherein the battery device supplies power to the electrical device.

[0027] In a third aspect, the utility model provides a vehicle, comprising an electrical device as described in any one of the embodiments of the second aspect.

[0028] The power distribution module and the safety component of the battery device of the utility model are both located on the same side. Compared with the situation where the power distribution module and the safety component are arranged on different sides, the space waste inside the battery device is reduced and the space utilization rate of the battery device is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 is a schematic diagram of a battery device according to an embodiment;

[0031] Figure 2 is a schematic diagram of a battery device according to another embodiment;

[0032] Figure 3 is a schematic diagram of a battery cell module of an embodiment;

[0033] Figure 4 is a schematic diagram of a battery cell module of another embodiment;

[0034] Figure 5 is a partial schematic diagram of a battery device according to an embodiment.

[0035] Description of reference numerals:

[0036] 100-battery cell assembly, 10-first battery cell module, 11-first unit, 111-third module, 112-fourth module, 12-second unit, 121-first module, 122-second module, 13-first connecting piece, 14-battery cell, 15-battery cell connecting piece, 20-second battery cell module, 30-power distribution module, 40-safety piece, 50-partition beam, 60-connector, 61-second connecting piece, 70-housing, X-first direction, Y-second direction. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0039] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meaning as those commonly understood by technicians in the technical field of this utility model. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used in this utility model includes any and all combinations of one or more related listed items.

[0040] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0041] For reference Figure 1 The multiple cell modules in the cell module are spaced apart in a first direction X, the cell modules are spaced apart in a second direction Y, and the first direction X and the second direction Y intersect.

[0042] For reference Figure 1 The utility model provides a battery device, including a battery cell assembly 100, a power distribution module 30 and a safety component 40. The battery cell assembly 100 includes a plurality of battery cell modules connected in series. The power distribution module 30 is connected to the battery cell assembly 100. The safety component 40 is arranged on the series circuit of the plurality of battery cells 14. The power distribution module 30 and the safety component 40 are both located on the same side of the battery cell assembly 100.

[0043] The power distribution module 30 includes a housing and electrical components. The electrical components are housed in the housing. The housing may be made of cold rolled sheet (SPCC), hot rolled sheet (SHCC), stainless steel, aluminum sheet and aluminum profile, engineering plastic (such as glass fiber unsaturated polyester resin), etc., without limitation. The housing is used to protect the internal electrical components from being affected by the external environment. At the same time, the housing also has a certain degree of protection and can withstand certain impacts and vibrations.

[0044] The electrical components include circuit breakers, AC contactors, thermal relays, intermediate relays, fuses, buttons, indicator lights, indicating instruments, terminal blocks, etc. The electrical components are used to distribute and control electrical energy to ensure the normal operation of the power system. The power distribution module 30 may also include other electrical components such as transformers, capacitors, mutual inductors, fuses, voltage stabilizers, rectifiers, and accessories such as cables, wire ducts, and guide rails for connecting wires.

[0045] The battery cell assembly 100 , the power distribution module 30 , and the fuse 40 may be directly connected via copper busbars, cables, and the like.

[0046] The insurance component 40 may be a fuse, a thermistor, a safety plate, etc. The insurance component 40 may prevent the battery from exploding, catching fire or other potential dangers, protect the battery and its related circuits from damage or prevent potential safety risks.

[0047] The battery device also includes a shell 70 and a tray. The battery cell module, the power distribution module 30 and the fuse 40 are housed in the shell 70, and the shell 70 is placed on the tray. The tray is used to support and fix the battery cell module. The tray is usually made of metal or plastic materials, among which metal materials such as aluminum alloy and stainless steel have high strength and corrosion resistance, and are suitable for battery systems under high loads and harsh environments. Plastic materials such as nylon, polycarbonate, fiberglass, etc. have light weight and good insulation properties, and are suitable for some application scenarios with high weight and cost requirements. The shell 70 mainly plays the role of protecting the battery cell module, preventing external impact, and preventing dust and water. The shell 70 is usually made of metal or plastic materials, and metal materials include aluminum alloy, stainless steel, etc., without limitation.

[0048] The multiple battery cell modules may or may not be identical, without limitation. Figure 1 The battery device includes a first battery cell module 10 and a second battery cell module 20 which are spaced apart in a second direction Y.

[0049] The power distribution module 30 and the safety component 40 of the battery device of the present invention are both located on the same side. Compared with the situation where the power distribution module 30 and the safety component 40 are arranged on different sides, the space waste inside the battery device is reduced and the space utilization rate of the battery device is improved.

[0050] For reference Figure 1 In one embodiment, the positive and negative electrodes of the plurality of battery cell modules, the power distribution module 30 and the fuse 40 are all located on the same side of the battery cell assembly 100 in the first direction X.

[0051] The multiple battery cell modules are arranged side by side, and the multiple battery cells 14 of the multiple battery cell modules are connected in series in sequence.

[0052] The battery cell 14 of the present invention may be a square battery. Optionally, the battery cell 14 is a blade battery cell. The blade battery cell has a high volume utilization rate and good heat dissipation performance, which effectively increases the space utilization rate of the battery device and improves the energy density of the battery device.

[0053] The positive and negative electrodes of the battery cell module and the power distribution module 30 are arranged on the same side in the first direction X, so that the space utilization rate of the battery device in the first direction X is further improved.

[0054] For reference Figure 1 In one embodiment, the battery cell assembly 100 includes a first battery cell module 10 and a second battery cell module 20 spaced apart in a second direction Y, and the safety member 40 is disposed on a series circuit between the first battery cell module 10 and the second battery cell module 20, and the first direction X and the second direction Y intersect.

[0055] Optionally, the power distribution module 30 and the fuse 40 are arranged in the middle area of ​​the battery device in the second direction Y and on the series circuit of the battery cell module, so that the power distribution module 30 and the fuse 40 can perform power distribution operations and safety protection on the first battery cell module 10 and the second battery cell module 20.

[0056] For reference Figure 1 In one embodiment, the first battery cell module 10 includes a first unit 11 and a second unit 12 spaced apart in a first direction X, the first unit 11 includes at least one battery cell module, the second unit 12 includes at least two battery cell modules, and the multiple battery cell modules of the second unit 12 are sequentially arranged in the second direction Y, the first direction X and the second direction Y intersect, and the second unit 12 is arranged on a side of the first unit 11 close to the distribution module 30.

[0057] In the first direction X, the battery cell modules of the second unit 12 may be arranged in multiple rows. Specifically, the second unit 12 may include four battery cell modules, and the four battery cell modules are arranged at intervals in the first direction X and the second direction Y.

[0058] A first connector 13 is provided between two adjacent battery cell modules in the first direction X. The first connector 13 may be a jumper copper busbar, which is made of an electrical copper busbar and has the advantages of low resistivity and large bendability. The jumper copper busbar is used for connecting the battery cell modules to ensure that the current can flow smoothly inside the battery device, thereby optimizing the performance of the battery device.

[0059] The arrangement of the cell modules in the second cell module 20 may be the same as or different from that in the first cell module 10. Specifically, the second cell module 20 may include only one cell module.

[0060] The second unit 12 has at least two battery modules so that the second unit 12 can be connected in series with the first unit 11 and electrically connected to the power distribution module 30 at the same time, so as to realize that multiple battery modules are electrically connected to the power distribution module 30, so as to realize that the power distribution module 30 performs power distribution operation on multiple battery modules. In one embodiment, the positive and negative electrodes of the first unit 11 are arranged on the same side of the first unit 11 close to the power distribution module 30, and the second unit 12 includes a first module 121 and a second module 122, the positive electrode of the first module 121 is connected to the negative electrode of the first unit 11, the negative electrode of the first module 121 is connected to the power distribution module 30, the positive electrode of the second module 122 is connected to the fuse 40, and the negative electrode of the second module 122 is connected to the positive electrode of the first unit 11.

[0061] The positive electrode and the negative electrode of the first module 121 and the second module 122 are both disposed on the different sides of the first module 121 and the second module 122 in the first direction X.

[0062] For reference Figure 2 In one embodiment, the first unit 11 includes a third module 111 and a fourth module 112, the positive electrode of the first module 121 is connected to the negative electrode of the third module 111, the negative electrode of the second module 122 is connected to the positive electrode of the fourth module 112, and the positive electrode of the third module 111 is connected to the negative electrode of the fourth module 112.

[0063] The first unit 11 may also include a plurality of battery modules, optionally, such as Figure 2 As shown, when the first unit 11 includes two battery modules, the positive electrode and the negative electrode of the third module 111 and the fourth module 112 are arranged on the different sides of the third module 111 and the fourth module 112 in the first direction X.

[0064] For reference Figure 3 and Figure 4 In one embodiment, the battery module includes a plurality of battery cells 14, the plurality of battery cells 14 are arranged in series, and the plurality of battery cells 14 are arranged at intervals in the second direction Y. Figure 3 As shown, when the number of the battery cells 14 is 2n+1, the positive electrode and the negative electrode of the battery cell module are arranged on the opposite sides of the battery cell module in the first direction X, as shown in FIG. Figure 4 As shown, when the number of the battery cells 14 is 2n, the positive electrode and the negative electrode of the battery cell module are arranged on the same side of the battery cell module in the first direction X, and n≥1 is a positive integer. Specifically, n can be 1, 2, 3, 4, etc., without limitation.

[0065] Two adjacent cells 14 are connected by a cell connection sheet 15, which is used for conducting and connecting. It must have excellent conductivity to reduce the loss of current during the transmission process. At the same time, the design of the connection sheet needs to ensure that the connection between the cells 14 is stable and reliable to avoid loosening or disconnection due to vibration or external force.

[0066] The cell connecting sheet 15 is usually made of a metal material with good electrical conductivity, specifically copper, aluminum or an alloy thereof.

[0067] For reference Figure 1 , when the first unit 11 has only one battery cell module, the positive electrode and the negative electrode of the first unit 11 are both arranged on the side of the first unit 11 close to the second unit 12, and the number of battery cells 14 of the first unit 11 is an even number. The positive electrode and the negative electrode of the first module 121 of the second unit 12 are arranged on the opposite sides of the first module 121 in the first direction X, and the positive electrode and the negative electrode of the second module 122 are arranged on the opposite sides of the second module 122 in the first direction X, indicating that the number of battery cells 14 of the first module 121 and the second module 122 are both odd numbers.

[0068] The number of cells 14 of the cell module is set accordingly according to the position of the cell module in the series circuit, thereby realizing the series circuit of the battery device.

[0069] For reference Figure 1 In one embodiment, the number of battery cells 14 arranged in the second direction Y of the first battery cell module 10 is the same as the number of battery cells 14 arranged in the second direction Y of the second battery cell module 20 .

[0070] The first cell module 10 and the second cell module 20 have the same number of cells 14 in the second direction Y, which can make the first voltage of the first series circuit corresponding to the first cell module 10 and the second voltage of the second series circuit corresponding to the second cell module 20 the same. During the self-heating of the battery device, that is, the charging and discharging process of the first cell module 10 to the second cell module 20, the first voltage and the second voltage are equal, which is conducive to extending the service life of the battery device and improving the safety of the battery device.

[0071] For reference Figure 5 In one embodiment, in the first battery cell module 10, a partition beam 50 is arranged between two adjacent battery cell modules in the second direction Y, and the partition beam 50 extends along the first direction X.

[0072] A longitudinal beam is further provided between two adjacent battery cell modules in the second direction Y, and a transverse beam is further provided between the first unit 11 and the second unit 12 adjacent in the first direction X.

[0073] The material of the partition beam 50 can be metal, engineering plastic, etc., specifically, it can be aluminum alloy, stainless steel, etc.

[0074] The partition beam 50 and the housing 70 of the battery device may be connected by welding, screwing, clamping, bonding, etc., without limitation.

[0075] The partition beam 50, the longitudinal beam and the cross beam separate the adjacent battery cell modules and battery cell modules, ensuring that each module maintains a certain distance and independence, which can prevent the battery cell 14 from thermal runaway when squeezed, and can also prevent mutual interference between modules, ensuring the overall safety and stability of the battery device. When the battery device is attacked by external force, the partition beam 50 can support the structure of the battery device, effectively reduce the deformation of the battery device housing 70, and thus protect the battery cell 14 from being squeezed.

[0076] In one embodiment, the dimension of the partition beam 50 in the second direction Y is d1, and the dimension of the battery cell 14 in the second direction Y is d2, which satisfies: d1 / d2=m, m≥1 and is a positive integer. m can be 1, 2, 3, etc. without limitation.

[0077] Optionally, m is 2, that is, the size of the partition beam 50 in the second direction Y is twice the size of the battery cell 14 in the second direction Y. Figure 5 The size of the first unit 11 in the second direction Y is equal to the size of the first module 121, the second module 122 and the partition beam 50 in the second direction Y, that is, the number of battery cells 14 in the first unit 11 is 2n, and the number of battery cells 14 in the first module 121 and the second module 122 is 2n-2.

[0078] The dimension of the partition beam 50 in the second direction Y is an integer multiple of the dimension of the battery cell 14 in the second direction Y, which can facilitate the battery cells 14 of the battery cell modules spaced apart in the first direction X to be flush, so that two battery cells 14 connected by the connecting sheet between the battery cell modules face each other.

[0079] For reference Figure 1 In one embodiment, the battery device further includes a connector 60, which is electrically connected to the power distribution module 30, and the connector 60 is arranged on the same side of the positive electrode and the negative electrode of the battery cell module.

[0080] The connector 60 can be disposed outside the battery device housing 70 or can be contained in the battery device housing 70 without limitation. The connector 60 is usually made of a metal material with good electrical conductivity, such as copper, aluminum or an alloy thereof, to ensure good electrical conductivity. Optionally, the connector 60 is an N-type connector 60.

[0081] The connector 60 is used to connect the battery modules inside the battery device, and to connect the battery modules with external equipment or power sources, so as to realize external charging and discharging.

[0082] For reference Figure 2In one embodiment, the safety member 40 is electrically connected to the connector 60. The connector 60 is connected to the safety member 40 via a second connector 61, which may be a cable, a copper busbar, etc., without limitation.

[0083] A first switch is provided between the first cell module 10 and the power distribution module 30, a second switch is provided between the first cell module 10 and the power distribution module 30; a third switch is provided between the second cell module 20 and the power distribution module 30, and a fourth switch is provided between the second cell module 20 and the insurance. The insurance element 40 is electrically connected to the connector 60, and a fifth switch is provided between the insurance element 40 and the connector 60.

[0084] When the first switch and the second switch are disconnected and the other switches are connected, the connector 60 can charge and discharge the second battery cell module 20; when the third switch and the fourth switch are disconnected and the other switches are connected, the connector 60 can charge and discharge the first battery cell module 10; when the fifth switch is disconnected and the other switches are connected, the connector 60 can charge and discharge the first battery cell module 10 and the second battery cell module 20; when all switches are connected and the connector 60 is not connected to an external power source or device, the first battery cell module 10 can charge and discharge the second battery cell module 20, thereby realizing self-heating of the battery device.

[0085] In one embodiment, the safety component 40 is integrated with the power distribution module 30. That is, the safety component 40 is accommodated in the housing of the power distribution module 30, which can further reduce the space of the battery device in the first direction X, improve the integration of the entire battery device, and reduce the cost of structural parts such as the box of the safety component 40.

[0086] In one embodiment, the safety component 40 and the power distribution module 30 are arranged in sequence in the second direction Y, that is, the safety component 40 is arranged outside the power distribution module 30, so as to facilitate the inspection and replacement of the safety component 40.

[0087] The utility model provides an electric device, including an electric device and a battery device as described in any of the above embodiments, wherein the battery device supplies power to the electric device. The electric device may be a washing machine, a television, etc., and the electric device may be a transformer, a light bulb, etc., without limitation.

[0088] The positive and negative electrodes of the cell module, the power distribution module 30 and the safety component 40 of the battery device of the utility model are all located on the same side of the battery device in the first direction X, and self-heating of the battery device can be achieved without setting a connecting row, thereby reducing the weight of the battery device, saving the cost of the connecting row, and improving the space utilization of the battery device.

[0089] The utility model provides a vehicle, including the electrical equipment as described in any of the above embodiments. The electrical equipment used in the vehicle can be a lighting system, a signal device, an instrument and an alarm device, an automotive electronic control system, etc., without limitation; the vehicle can be an electric vehicle, a car, etc., without limitation.

[0090] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship described in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0091] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A battery device, characterized in that: include: A battery cell assembly (100) comprises a plurality of battery cell modules connected in series; A power distribution module (30) connected to the battery cell assembly (100); A safety element (40) is arranged on a series circuit of a plurality of the battery modules; Wherein, the power distribution module (30) and the safety component (40) are both located on the same side of the battery cell assembly (100).

2. The battery device according to claim 1, characterized in that: The positive and negative electrodes of the plurality of battery cell modules, the power distribution module (30) and the fuse (40) are all located on the same side of the battery cell assembly (100) in the first direction.

3. The battery device according to claim 2, characterized in that: The battery cell assembly (100) comprises a first battery cell module (10) and a second battery cell module (20) which are arranged at intervals in a second direction, the safety component (40) is arranged on a series circuit between the first battery cell module (10) and the second battery cell module (20), and the first direction intersects with the second direction.

4. The battery device according to claim 3, characterized in that: The first battery cell module (10) comprises a first unit (11) and a second unit (12) arranged at intervals in the first direction, the first unit (11) comprising at least one battery cell module, the second unit (12) comprising at least two battery cell modules, a plurality of battery cell modules of the second unit (12) being arranged in sequence in the second direction, the first direction and the second direction intersecting, and the second unit (12) being arranged on a side of the first unit (11) close to the power distribution module (30).

5. The battery device according to claim 4, characterized in that: The positive electrode and the negative electrode of the first unit (11) are arranged on the same side of the first unit (11) close to the power distribution module (30); the second unit (12) comprises a first module (121) and a second module (122); the positive electrode of the first module (121) is connected to the negative electrode of the first unit (11); the negative electrode of the first module (121) is connected to the power distribution module (30); the positive electrode of the second module (122) is connected to the safety element (40); and the negative electrode of the second module (122) is connected to the positive electrode of the first unit (11).

6. The battery device according to claim 5, characterized in that: The first unit (11) comprises a third module (111) and a fourth module (112); the positive electrode of the first module (121) is connected to the negative electrode of the third module (111); the negative electrode of the second module (122) is connected to the positive electrode of the fourth module (112); and the positive electrode of the third module (111) is connected to the negative electrode of the fourth module (112).

7. The battery device according to claim 4, characterized in that: The battery cell module comprises a plurality of battery cells (14), the plurality of battery cells (14) are arranged in series, and the plurality of battery cells (14) are arranged at intervals in the second direction; Wherein, when the number of the battery cells (14) is 2n, the positive electrode and the negative electrode of the battery cell module are arranged on the same side of the battery cell module in the first direction; When the number of the battery cells (14) is 2n+1, the positive electrode and the negative electrode of the battery cell module are arranged on different sides of the battery cell module in the first direction, and n≥1 is a positive integer.

8. The battery device according to claim 3, characterized in that: The number of battery cells (14) arranged in the second direction of the first battery cell module (10) is the same as the number of battery cells (14) arranged in the second direction of the second battery cell module (20).

9. The battery device according to claim 3, characterized in that: In the first battery cell module (10), a partition beam (50) is provided between two adjacent battery cell modules in the second direction, and the partition beam (50) extends along the first direction.

10. The battery device according to claim 9, characterized in that: The dimension of the partition beam (50) in the second direction is d1, and the dimension of the battery cell (14) in the second direction is d2, satisfying: d1 / d2=m, m≥1 and is a positive integer.

11. The battery device according to any one of claims 1 to 10, characterized in that: The battery device further comprises a connector (60), the connector (60) being electrically connected to the power distribution module (30), and the connector (60) being arranged on the same side of the battery cell assembly (100).

12. The battery device according to claim 11, characterized in that: The safety element (40) is electrically connected to the connector (60).

13. The battery device according to any one of claims 1 to 10, characterized in that: The safety element (40) is integrated with the power distribution module (30).

14. The battery device according to any one of claims 1 to 10, characterized in that: The safety element (40) and the power distribution module (30) are arranged in sequence in the second direction.

15. An electrical equipment, characterized in that: The invention comprises an electric device and a battery device as claimed in any one of claims 1 to 14, wherein the battery device supplies power to the electric device.

16. A vehicle, characterized in that: Comprising the electrical equipment as claimed in claim 15.

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