Distribution box, battery device and electric equipment

Abstract

The utility model discloses a distribution box, a battery device and electric equipment. The battery device comprises a power distribution box, the power distribution box comprises a battery management unit control board and a battery cell monitoring unit control board which are in direct plug-in electric connection through a plug-in type electric connection structure, and one side edge of the battery management unit control board is adjacent to the battery cell monitoring unit control board. The plane where the surface is located intersects with the plane where the surface of the battery cell monitoring unit control panel is located; the plug-in type electric connection structure comprises a first connector and a second connector, the first connector is installed on a first installation part, close to one side edge, of the surface of the battery management unit control panel, and the second connector is installed on a second installation part, opposite to the first connector, of the surface of the battery cell monitoring unit control panel. The internal space occupation of the battery device can be saved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of batteries, in particular to a power distribution box, a battery device and a power utilization equipment. BACKGROUND

[0002] Secondary batteries, especially lithium ion batteries, have the advantages of high voltage, large specific energy, long cycle life, green and pollution-free, wide working temperature range and small self-discharge, and are widely used in portable electronic devices and large new energy electric vehicles, which have great significance in solving human environmental pollution and energy crisis. With the wide application of lithium ion batteries, improving the capacity of the battery has become a problem that producers are closely concerned about. CONTENT OF THE UTILITY MODEL

[0003] In one aspect of the present disclosure, a battery device is provided, comprising a power distribution box, the power distribution box comprising a battery management unit control board and a cell monitoring unit control board, the battery management unit control board being directly connected with the cell monitoring unit control board through a plug-in electrical connection structure.

[0004] The one side edge of the battery management unit control board is adjacent to the cell monitoring unit control board, and the surface plane of the battery management unit control board intersects with the surface plane of the cell monitoring unit control board.

[0005] The plug-in electrical connection structure comprises a first connector and a second connector, the first connector being installed at a first installation site on the surface of the battery management unit control board adjacent to the one side edge, and the second connector being installed at a second installation site on the surface of the cell monitoring unit control board opposite to the first connector.

[0006] In the present embodiment, the power distribution box integrates the battery management unit control board and the cell monitoring unit control board, and the battery management unit control board is electrically connected with the cell monitoring unit control board through the plug-in electrical connection structure, which can eliminate the wire harness for connecting the battery management unit control board and the cell monitoring unit control board respectively, thereby compared with the scheme of connecting the battery management system and the cell sampling monitoring assembly through the wire harness in the related art, the integration of the battery management unit control board and the cell monitoring unit control board in the power distribution box in the present embodiment can eliminate the internal space occupied by the wire harness, effectively saving the internal space of the battery device, thereby being conducive to improving the capacity of the battery device and reducing the size of the battery device.

[0007] And, by making the plane where the surface of the battery management unit control board is located intersect the plane where the surface of the cell monitoring unit control board is located, and making one side edge of the battery management unit control board abut the cell monitoring unit control board, the first connector and the second connector that are adjacent to each other and plugged can be conveniently arranged, so that the structure is more compact, and the cable for connection can be saved.

[0008] In some embodiments, the plug-in electrical connection structure comprises: a first connector mounted on the battery management unit control board and having a first connection terminal electrically connected with the battery management unit control board; and a second connector mounted on the cell monitoring unit control board, and an effective electrical contact range L of the first connection terminal and the second connection terminal in the plug-in direction is greater than the sum of the maximum manufacturing tolerance of the first connector, the maximum manufacturing tolerance of the second connector, and the maximum assembly tolerance between the battery management unit control board and the cell monitoring unit control board in the plug-in direction.

[0009] In the present embodiment, according to the maximum manufacturing tolerance of the first connector and the second connector respectively and the maximum assembly tolerance between the battery management unit control board and the cell monitoring unit control board, by making the effective electrical contact range L of the first connection terminal of the first connector and the second connection terminal of the second connector in the plug-in direction not less than the sum of these tolerances, reliable electrical contact between the connection terminals can be ensured within the allowable manufacturing and assembly errors, so as to improve the electrical connection reliability of the plug-in electrical connection structure.

[0010] In some embodiments, the effective electrical contact range L satisfies: L≥1.5mm.

[0011] By making the effective electrical contact range L not less than 1.5mm, the plug-in depth within this range can be adjusted without the need to arrange other fixed or positioning structures between the first connector and the second connector, so that when the battery management unit control board and the cell monitoring unit control board are respectively connected and fixed with the support through the locking accessories, a certain installation allowance can be allowed, so as to facilitate the installation of the distribution box.

[0012] In some embodiments, the effective electrical contact range L satisfies: L≥2mm.

[0013] When the battery management unit control board and the cell monitoring unit control board are respectively connected and fixed with the support through the locking accessories, a larger installation allowance can be allowed, so as to facilitate the installation of the distribution box.

[0014] In some embodiments, the first connector has a plurality of first connection terminals, and a first electrical partition is provided between first pins of at least one set of adjacent first connection terminals; and / or the second connector has a plurality of second connection terminals, and a second electrical partition is provided between second pins of at least one set of adjacent second connection terminals.

[0015] Providing the first electrical partition between the first pins of the adjacent first connection terminals can electrically isolate the first pins of the adjacent first connection terminals to increase the creepage distance and the electrical clearance between the first pins of the adjacent first connection terminals to meet the requirements of high voltage applications such as 1000V DC. Providing the second electrical partition between the second pins of the adjacent second connection terminals can electrically isolate the second pins of the adjacent second connection terminals to increase the creepage distance and the electrical clearance between the second pins of the adjacent second connection terminals to meet the requirements of high voltage applications such as 1000V DC.

[0016] In some embodiments, the first electrical partition at least extends beyond the first pins in a thickness direction of the battery management unit control board; and / or the second electrical partition at least extends beyond the second pins in a thickness direction of the cell monitoring unit control board.

[0017] In the present embodiment, by making the first electrical partition at least extend beyond the first pins in a thickness direction of the battery management unit control board, the creepage distance and the electrical clearance between the adjacent first pins can be increased to further improve reliability. By making the second electrical partition at least extend beyond the second pins in a thickness direction of the cell monitoring unit control board, the creepage distance and the electrical clearance between the adjacent second pins can be increased to further improve reliability.

[0018] In some embodiments, the first mounting site is provided with a first through hole and a first weld hole that pass through the battery management unit control board, and the first connector includes: a first housing provided on a surface of the first mounting site; a plurality of first connection terminals provided in the first housing, each first connection terminal having a first pin exposed to the first housing and welded with the first weld hole; and a first electrical partition connected with or integrally formed with the first housing, located between the first pins of at least one set of adjacent first connection terminals of the plurality of first connection terminals, and passing through the first through hole.

[0019] In the embodiment, the first pins exposed to the first housing are soldered with the first solder holes to realize the electrical connection, and the first electrical partition plate connected with or integrally formed with the first housing is arranged between the adjacent first pins to realize the electrical isolation, and the first housing is stably mounted at the first mounting position by soldering the first pins with the first solder holes through the first through hole to realize the protection of electrical connection and electrical isolation.

[0020] In some embodiments, the first housing has a plurality of plug-in cavities, and the plurality of first connection terminals are respectively partially arranged in the plurality of plug-in cavities. The second connector includes: a second housing arranged on the surface of the second mounting position and having a plurality of plug-in pegs configured to be respectively plugged into the plurality of plug-in cavities; and a plurality of second connection terminals arranged in the second housing and respectively partially arranged in the plurality of plug-in pegs. The plurality of second connection terminals are configured to be respectively in electrical contact with the plurality of first connection terminals in a state that the plurality of plug-in pegs are respectively plugged into the plurality of plug-in cavities.

[0021] In the embodiment, the plug-in cooperation of the plug-in pegs and the plug-in cavities can realize more reliable and stable electrical contact between the first connection terminals and the second connection terminals, thereby improving the stability of the electrical connection.

[0022] In some embodiments, the second mounting position is provided with a second through hole and a second solder hole penetrating the control panel of the battery cell monitoring unit, each second connection terminal has a second pin exposed to the second housing and soldered with the second solder hole, and the second connector further includes: a second electrical partition plate connected with or integrally formed with the second housing and located between the second pins of at least one group of adjacent second connection terminals in the plurality of second connection terminals and penetrating the second through hole.

[0023] In the embodiment, the second pins exposed to the second housing are soldered with the second solder holes to realize the electrical connection, and the second electrical partition plate connected with or integrally formed with the second housing is arranged between the adjacent second pins to realize the electrical isolation, and the second housing is stably mounted at the second mounting position by soldering the second pins with the second solder holes through the second through hole to realize the protection of electrical connection and electrical isolation.

[0024] In some embodiments, the first connector further includes a first soldering pin for limiting the first housing at the first mounting position so that the first pins are soldered with the first solder holes, and / or the second connector further includes a second soldering pin for limiting the second housing at the second mounting position so that the second pins are soldered with the second solder holes.

[0025] In the embodiment, the first shell is pre-fixed through the limiting effect of the first soldering leg, so that the soldering between the first pin and the first soldering hole is facilitated, and the second shell is pre-fixed through the limiting effect of the second soldering leg, so that the soldering between the second pin and the second soldering hole is facilitated, thereby improving the welding quality and reliability.

[0026] In some embodiments, the battery device further comprises: a sampling assembly having a plurality of sampling terminals connected with a plurality of sampling positions of the battery device respectively; a plurality of battery monomers arranged at least in a first direction; and a plurality of busbars electrically connected with the plurality of sampling terminals respectively, and each busbar is electrically connected with adjacent battery monomers respectively; wherein the sampling assembly comprises a sampling circuit board electrically connected with the battery core monitoring unit control board through a battery core connecting assembly, and the plurality of sampling terminals are arranged on the sampling circuit board.

[0027] In the embodiment, the sampling terminals are connected with the busbars for electrically connecting adjacent battery monomers, so that the busbars connected with each battery monomer can be connected with the sampling terminals distributed on the sampling circuit board in proximity, and the sampling circuit board is electrically connected with the battery core monitoring unit control board through the battery core connecting assembly, so that the obtained sampling signals can be reliably transmitted to the control board.

[0028] In one aspect of the present disclosure, a power consuming device is provided, comprising the aforementioned battery device.

[0029] In the embodiment, the aforementioned battery device can achieve better capacity or size, thereby facilitating the performance and size of the power consuming device using the battery device of the aforementioned embodiment.

[0030] In one aspect of the present disclosure, a power distribution box is provided, comprising a box body, and a battery management unit control board and a battery core monitoring unit control board arranged in the box body, the battery management unit control board and the battery core monitoring unit control board are directly connected through a plug-in electrical connection structure.

[0031] The one side edge of the battery management unit control board is adjacent to the battery core monitoring unit control board, and the surface of the battery management unit control board is intersected with the surface of the battery core monitoring unit control board.

[0032] The plug-in electrical connection structure comprises a first connector and a second connector, the first connector is installed at a first mounting position of the surface of the battery management unit control board adjacent to the one side edge, and the second connector is installed at a second mounting position of the surface of the battery core monitoring unit control board opposite to the first connector.

[0033] In the embodiment, the power distribution box integrates the battery management unit control board and the cell monitoring unit control board, and the battery management unit control board is electrically connected with the cell monitoring unit control board through the plug-in electrical connection structure, so that the wire harness for connecting the battery management unit control board and the cell monitoring unit control board can be omitted. Compared with the scheme of connecting the battery management system and the cell sampling monitoring assembly through the wire harness in the related art, the integration of the battery management unit control board and the cell monitoring unit control board in the power distribution box can save the internal space occupied by the wire harness, so that the internal space of the battery device can be effectively saved, thereby facilitating the increase of the capacity of the battery device and the reduction of the size of the battery device.

[0034] Moreover, by making the plane where the surface of the battery management unit control board is located intersect with the plane where the surface of the cell monitoring unit control board is located, and making one side edge of the battery management unit control board abut the cell monitoring unit control board, the first connector and the second connector can be conveniently arranged adjacent to and plugged with each other, so that the structure is more compact, and the cable for connection can be omitted. BRIEF DESCRIPTION OF DRAWINGS

[0035] The accompanying drawings, which are included as part of this specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0036] The present disclosure can be more clearly understood and appreciated from the following detailed description, taken in conjunction with the following drawings of which:

[0037] Figure 1 is a structural schematic diagram of some embodiments of the electrical equipment according to the present disclosure;

[0038] Figure 2 is an exploded structural schematic diagram of some embodiments of the battery device according to the present disclosure;

[0039] Figure 3 is an internal structural schematic diagram of some embodiments of the battery device according to the present disclosure;

[0040] Figure 4 is an enlarged view of the A area of Figure 3

[0041] Figure 5 is an assembly structural schematic diagram of the power distribution box in some embodiments of the battery device according to the present disclosure;

[0042] Figure 6 is an exploded structural schematic diagram of the power distribution box in some embodiments of the battery device according to the present disclosure;

[0043] Figure 7 is an assembly structural schematic diagram of the power distribution box in other embodiments of the battery device according to the present disclosure;​

[0044] Figure 8 is an assembled structural schematic diagram of the plug-in electrical connection structure in some embodiments of the battery device according to the present disclosure;

[0045] Figure 9 is an exploded structural schematic diagram of the plug-in electrical connection structure in some embodiments of the battery device according to the present disclosure;

[0046] Figure 10 is a further exploded structural schematic diagram of the plug-in electrical connection structure in some embodiments of the battery device according to the present disclosure;

[0047] Figure 11 is a structural schematic diagram of the first connector in some embodiments of the battery device according to the present disclosure;

[0048] Figure 12 is a sectional schematic diagram of the effective electrical contact between the first connecting terminal and the second connecting terminal in some embodiments of the battery device according to the present disclosure.

[0049] It should be understood that the dimensions of the various parts shown in the drawings are not drawn to scale. In addition, the same or similar reference numerals indicate the same or similar components.

[0050] BRIEF DESCRIPTION OF DRAWINGS

[0051] 10, sampling assembly; 11, sampling terminal; 12, sampling circuit board; 13, cell connecting assembly;

[0052] 20, distribution box; 21, support; 211, distribution box body; 22, battery management unit control board; 221, first through hole; 222, first solder hole; 223, first soldering hole; 23, cell monitoring unit control board; 231, second through hole; 232, second solder hole; 233, second soldering hole; 24, locking accessory;

[0053] 40, plug-in electrical connection structure; 41, first connector; 411, first connecting terminal; 412, first pin; 413, first electrical partition; 414, first housing; 4141, plug-in cavity; 4142, first soldering groove; 4143, partition; 415, first soldering pin; 42, second connector; 421, second connecting terminal; 422, second pin; 423, second electrical partition; 424, second housing; 4241, plug-in bolt; 4242, second soldering groove; 425, second soldering pin;

[0054] 50, battery device; 51, battery monomer; 52, busbar; 53, box body; 54, box cover;

[0055] 60, vehicle; 61, controller; 62, motor; 63, axle; 64, wheel;

[0056] M1, first mounting point; M2, second mounting point. DETAILED DESCRIPTION

[0057] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative in nature and is in no way intended to limit the disclosure, its application or uses, except as described by the appended claims. The present disclosure can be implemented in numerous different forms, as is desired for specific applications; the embodiments provided herein are in no way limiting. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the relative arrangement of components and steps, the numerical expressions, and the numerical values set forth in these embodiments are to be interpreted as merely exemplary, unless otherwise specifically stated.

[0058] The terms "first", "second", and similar terms used in the present disclosure do not necessarily mean any order, number, or importance, but are used to distinguish different parts. The terms "include", "comprise", and similar terms mean that the elements before the terms encompass the elements listed after the terms, and do not exclude the possibility of also encompassing other elements. The terms "upper", "lower", "left", "right", and the like are used only to indicate relative positional relationships, and when the absolute positions of the described objects are changed, the relative positional relationships can also be changed accordingly.

[0059] In the present disclosure, when it is described that a certain device is located between a first device and a second device, there can be an intervening device between the certain device and the first device or the second device, or there can be no intervening device. When it is described that a certain device is connected to other devices, the certain device can be directly connected to the other devices without an intervening device, or can not be directly connected to the other devices with an intervening device.

[0060] All terms used in the present disclosure, including technical or scientific terms, have the same meanings as those understood by those skilled in the art to which the present disclosure pertains, unless otherwise specifically defined. It should also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and should not be interpreted in an idealized or overly formal sense, unless specifically so defined herein.

[0061] Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail herein, but should be considered as if the discussion were in part incorporated herein by reference.

[0062] In the present disclosure, "at least one" refers to one or more, "a plurality of" refers to two or more (including two), and "at least partially" refers to all or a part.

[0063] In some related technologies, the battery management system in the battery device is connected with the sampling component for sampling signals of the battery monomer through a wire harness switching mode.

[0064] It is found through research that the battery management system, the sampling component and the wire harness connecting them in the related technology occupy a large space inside the battery box, increase the weight of the battery, and are not conducive to improving the capacity of the battery device, and are also not easy to install.

[0065] Therefore, the present disclosure provides a battery device which can save internal space occupation.

[0066] In one aspect of the present disclosure, a battery device is provided, comprising a power distribution box, wherein the power distribution box comprises a battery management unit control board and a cell monitoring unit control board, the battery management unit control board is installed on the support, and the cell monitoring unit control board is directly connected by plug-in electrical connection structure; wherein one side of the battery management unit control board is adjacent to the cell monitoring unit control board, and the plane on which the surface of the battery management unit control board is located intersects the plane on which the surface of the cell monitoring unit control board is located; the plug-in electrical connection structure comprises a first connector and a second connector, the first connector is installed at a first installation site on the surface of the battery management unit control board adjacent to the one side, and the second connector is installed at a second installation site on the surface of the cell monitoring unit control board opposite to the first connector.

[0067] In the present embodiment, the power distribution box integrates the battery management unit control board and the cell monitoring unit control board, and the battery management unit control board and the cell monitoring unit control board are electrically connected by plug-in electrical connection structure, which can save the wire harness for connecting the cell monitoring unit control board and the battery management unit control board respectively, so that compared with the scheme of connecting the battery management system and the cell sampling monitoring component by wire harness switching mode in the related technology, the integration of the battery management unit control board and the cell monitoring unit control board in the power distribution box in the present embodiment can save the internal space occupied by the wire harness, effectively saving the internal space occupation of the battery device, thereby facilitating to improve the capacity of the battery device and reduce the size of the battery device.

[0068] And, by making the plane where the surface of the battery management unit control board is located intersect the plane where the surface of the cell monitoring unit control board is located, and making one side edge of the battery management unit control board abut the cell monitoring unit control board, the first connector and the second connector that are adjacent to each other and plugged can be conveniently arranged, so that the structure is more compact, and the cable for connection can be saved.

[0069] The battery device of the embodiments of the present disclosure can be applied to various power consumption devices using the battery device. The power consumption device can be a mobile phone, a portable device, a notebook computer, an electric vehicle, an electric automobile, a ship, a spacecraft, an electric toy, and an electric tool, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle, a spacecraft, etc. The electric toy includes a fixed or mobile electric toy, such as a game 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, such as 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. The embodiments of the present disclosure do not particularly limit the above power consumption device. The battery device can be used for power supply of the power consumption device, such as a vehicle, to provide power for operation or driving of the vehicle. In other embodiments, the battery device can be an energy storage device. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0070] Figure 1 is a structural schematic diagram of some embodiments of the power consumption device according to the present disclosure. For convenience, the power consumption device is taken as a vehicle 60 for example. Referring to Figure 1 , the vehicle 60 can be a fuel automobile, a gas automobile, or a new energy automobile, which can be a pure electric automobile or a hybrid electric automobile, etc. The battery device 50 can be arranged at the bottom, the front, or the rear of the vehicle 60.

[0071] The battery device 50 can be used for power supply of the vehicle 60, for example, the battery device 50 can be used as an operating power source of the vehicle 60, to supply power for the circuit system of the vehicle 60, such as the power required for starting, navigation, and operation of the vehicle 60. The battery device 50 can not only be used as an operating power source of the vehicle 60, but also be used as a driving power source of the vehicle 60, to replace or partially replace fuel or natural gas to provide driving force for the vehicle 60.

[0072] The inside of the vehicle 60 can also be provided with an axle 63, a wheel 64, a motor 62, and a controller 61, which is used to control the power supply of the battery device 50 to the motor 62. For example, when the battery device 50 is used as a driving power source of the vehicle 60, the battery device 50 replaces or partially replaces fuel or natural gas to provide the required power for the motor 62 at a constant speed or acceleration. The motor 62 is used to drive the axle 63 to rotate, to drive the wheel 64 to rotate.

[0073] Figure 2 is an exploded structural schematic diagram of some embodiments of the battery device according to the present disclosure. Referring to Figure 2 In some embodiments, the battery device 50 can include a plurality of battery cells 51, a box 53, and a box cover 54 covering the open side of the box 53. The box 53 and the box cover 54 can provide a containing space for the battery cells 51, and provide functions such as sealing and impact resistance, and can also avoid the adverse effects of liquid or other foreign matter on the charging and discharging or safety of the battery module.

[0074] The box 53 and the box cover 54 can be various shapes, such as a cuboid or a cylinder, etc. The box 53 can be a hollow structure with one side open, and the box cover 54 can also be a hollow structure with one side open. The open side of the box cover 54 covers the open side of the box 53, thereby forming an internal containing space. In other embodiments, the box cover 54 is a plate structure and covers the open side of the box 53 to form an internal containing space.

[0075] The box 53 can be independently provided, or can be part of the chassis structure of the vehicle. For example, part of the box 53 can be at least part of the floor of the vehicle, or part of the box 53 can be at least part of the cross beam and the longitudinal beam of the vehicle.

[0076] For the battery device 50 including a plurality of battery cells 51, the plurality of battery cells 51 can be arranged in at least one of the length direction and the width direction of the box 53. According to actual needs, at least one row of battery cells 51 can be provided. According to needs, one or more layers of battery cells 51 can also be provided in the height direction of the battery device 50.

[0077] In some embodiments, the plurality of battery cells 51 can form one or more battery cell groups or battery modules in series, in parallel, or in a hybrid manner, and the one or more battery cell groups or battery modules are contained in the box 53. For the plurality of battery cell groups or battery modules, one or more layers of battery cell groups or battery modules can be arranged in at least one of the length direction and the width direction of the box 53, or in the height direction of the battery device 50.

[0078] Figure 3 is an internal structural schematic diagram of some embodiments of the battery device according to the present disclosure. Figure 4 is an enlarged view of area A of Figure 3 Figure 5 is an assembly structural schematic diagram of the distribution box in some embodiments of the battery device according to the present disclosure. Figure 6 is an exploded structural schematic diagram of the distribution box in some embodiments of the battery device according to the present disclosure. Figure 7 ​is a schematic diagram of the assembly structure of the distribution box according to another embodiment of the battery device of the present disclosure.

[0079] Referring to Figures 3-7 The present disclosure provides a battery device 50 comprising a distribution box 20. The distribution box 20 comprises a battery management unit control board 22 and a cell supervision circuit control board 23. The battery management unit control board 22 and the cell supervision circuit control board 23 are directly connected by a plug-in electrical connection structure 40. One side of the battery management unit control board 22 is adjacent to the cell supervision circuit control board 23, and the surface of the battery management unit control board 22 is intersected with the surface of the cell supervision circuit control board 23. The plug-in electrical connection structure 40 comprises a first connector 41 and a second connector 42. The first connector 41 is installed at a first mounting position M1 of the surface of the battery management unit control board 22 adjacent to the one side, and the second connector 42 is installed at a second mounting position M2 of the surface of the cell supervision circuit control board 23 opposite to the first connector 41.

[0080] The distribution box 20 (for example, a high-voltage distribution box) can realize functions such as main charge-discharge circuit on-off, current distribution, short circuit and overload protection in the battery device 50, and comprises a battery management unit (BMU) control board 22 and a cell supervision circuit (CSC) control board 23. The distribution box 20 can further comprise other components such as fuses, relays, etc.

[0081] The cell supervision circuit control board 23 can be electrically connected with the sampling assembly 10 corresponding to one or more groups of battery monomers 51 in the battery device 50. In Figure 3 It can be seen that the plurality of sampling circuit boards 12 corresponding to the plurality of groups of battery monomers in the sampling assembly 10 are connected with Figure 3 The cell supervision circuit control board 23 on the right side in

[0082] The battery management unit control board 22 is electrically connected with the cell supervision circuit control board 23, which can receive data such as current or voltage transmitted by the cell supervision circuit control board 23, and can also perform functions such as battery management strategy, external communication, etc.

[0083] As Figure 5As shown in FIG. 1, the battery management unit control board 22 and the cell monitoring unit control board 23 can be integrated in the distribution box 20 by being mounted on the support 21 of the distribution box 20, and directly connected by the plug-in electrical connection structure 40. In this way, the battery management unit control board 22 and the cell monitoring unit control board 23 can form an integrated structure of the distribution box 20, and the battery management unit control board 22 and the cell monitoring unit control board 23 which are relatively adjacent can be directly connected by the plug-in electrical connection structure 40 without the need of being connected by a wire harness.

[0084] As shown in FIG. 1, the surface of the battery management unit control board 22 can be parallel to the z direction, the surface of the cell monitoring unit control board 23 can be parallel to the x direction, and the surface of the battery management unit control board 22 and the surface of the cell monitoring unit control board 23 can be parallel to the y direction. One side of the battery management unit control board 22 in the z direction can be adjacent to the cell monitoring unit control board 23, which can be opposite to the side of the cell monitoring unit control board 23 in the x direction, or adjacent to the area between the side and the middle of the cell monitoring unit control board 23. Figure 5 Figure 6 As shown in FIG. 1, the surface of the battery management unit control board 22 can be parallel to the z direction, the surface of the cell monitoring unit control board 23 can be parallel to the x direction, and the surface of the battery management unit control board 22 and the surface of the cell monitoring unit control board 23 can be parallel to the y direction. One side of the battery management unit control board 22 in the z direction can be adjacent to the cell monitoring unit control board 23, which can be opposite to the side of the cell monitoring unit control board 23 in the x direction, or adjacent to the area between the side and the middle of the cell monitoring unit control board 23.

[0085] The surface of the battery management unit control board 22 and the surface of the cell monitoring unit control board 23 can be perpendicular to each other as shown in FIG. 1, or can be at a preset angle of inclination. Figure 5

[0086] The first mounting position M1 can be a part of the surface of the battery management unit control board 22, or a structure provided on the surface of the battery management unit control board 22. The second mounting position M2 can be a part of the surface of the cell monitoring unit control board 23, or a structure provided on the surface of the cell monitoring unit control board 23.

[0087] The first connector 41 is mounted at the first mounting position M1, which is opposite to the second mounting position M2, so that the second connector mounted at the second mounting position M2 can be conveniently plugged with the first connector 41.

[0088] ​​In the embodiment, the power distribution box 20 integrates the battery management unit control board 22 and the cell monitoring unit control board 23, and the battery management unit control board 22 and the cell monitoring unit control board 23 are directly connected through the plug-in electrical connection structure. The wire harness for connecting the cell monitoring unit control board 23 and the battery management unit control board 22 can be omitted. Compared with the prior art in which the battery management system and the cell sampling monitoring assembly are connected through the wire harness, the integration of the battery management unit control board 22 and the cell monitoring unit control board 23 in the power distribution box 20 can save the internal space occupied by the wire harness, effectively save the internal space of the battery device 50, and thus facilitate the increase of the capacity of the battery device 50 and the reduction of the size of the battery device 50.

[0089] Furthermore, by making the plane where the surface of the battery management unit control board 22 is located intersect with the plane where the surface of the cell monitoring unit control board 23 is located, and by making one side edge of the battery management unit control board 22 abut the cell monitoring unit control board 23, the first connector 41 and the second connector 42 can be conveniently arranged adjacent to and plugged into each other. In this way, the structure is more compact, and the connecting cable can be omitted.

[0090] Reference Figure 3 And Figure 4 In some embodiments, the battery device 50 further includes a sampling assembly 10, a plurality of battery cells 51 arranged along at least a first direction, and a plurality of busbars 52. The sampling assembly 10 has a plurality of sampling terminals 11 connected to a plurality of sampling positions of the battery device 50, respectively. The plurality of busbars 52 are electrically connected to the plurality of sampling terminals 11, respectively, and each busbar 52 is electrically connected to adjacent battery cells 51, respectively. The sampling assembly 10 includes a sampling circuit board 12 electrically connected to the cell monitoring unit control board 23, and the plurality of sampling terminals 11 are arranged on the sampling circuit board 12.

[0091] The sampling assembly 10 is used in the battery device 50 to sample some important physical quantities (such as the voltage, temperature, and other parameters of the battery cells or battery modules) in the battery device 50. As shown in Figure 3 And Figure 4 As shown, the sampling assembly 10 has a plurality of sampling terminals 11 connected to a plurality of sampling positions of the battery device 50, respectively. The sampling terminals 11 can be metal contacts or connecting tabs, which can be electrically connected to the sampling positions such as the poles of the battery cells 51 or the busbars 52 connecting the poles, to collect the voltage or current signals of the corresponding sampling positions.

[0092] The battery cell 51 can be a secondary battery, which refers to a battery cell 51 that can be activated by charging after being discharged to continue to be used.

[0093] The battery cell 51 can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, or the like, and the present disclosure is not limited thereto.

[0094] The battery cell 51 includes an electrode assembly. The electrode assembly includes first and second polar plates having opposite polarities, and a separator disposed between the first and second polar plates. In some embodiments, the first polar plate is a positive polar plate, and the second polar plate is a negative polar plate. In other embodiments, the first polar plate is a negative polar plate, and the second polar plate is a positive polar plate. During charging and discharging of the battery cell 51, active ions (e.g., lithium ions) are intercalated and deintercalated between the positive and negative polar plates. The separator is disposed between the positive and negative polar plates, and can function to prevent short circuiting between the positive and negative polar plates, while allowing the active ions to pass through.

[0095] In some embodiments, the positive polar plate can include a positive current collector substrate and a positive active material layer disposed on at least one surface of the positive current collector substrate.

[0096] As an example, the positive current collector substrate has two surfaces opposite in its own thickness direction, and the positive active material layer is disposed on either one or both of the two opposite surfaces of the positive current collector substrate.

[0097] As an example, the positive current collector substrate can be a metal foil or a composite current collector. For example, as a metal foil, silver surface treated aluminum or stainless steel, stainless steel, copper, aluminum, nickel, a carbon electrode, carbon, nickel, or titanium, or the like can be used. The composite current collector can include a polymer material base layer and a metal layer. The composite current collector can be formed by disposing a metal material (aluminum, aluminum alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, or the like) on a polymer material base material (such as a base material of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, or the like).

[0098] As an example, the positive active material layer can include at least one of a lithium-containing phosphate, a lithium transition metal oxide, and a modified compound of each thereof. However, the disclosure is not limited to these materials, and other conventional materials that can be used as a battery positive active material layer can also be used. These positive active material layers can be used alone only one or two or more can be used in combination. Among them, examples of the lithium-containing phosphate can include, but are not limited to, at least one of lithium iron phosphate (such as LiFeP04(also can be referred to as LFP)), a composite of lithium iron phosphate and carbon, lithium manganese phosphate (such as LiMnPO4), a composite of lithium manganese phosphate and carbon, lithium manganese iron phosphate, a composite of lithium manganese iron phosphate and carbon. Examples of the lithium transition metal oxide can include, but are not limited to, at least one of lithium cobalt oxide (such as LiCoO2), lithium nickel oxide (such as LiNiO2), lithium manganese oxide (such as LiMnO2, LiMn2O4), lithium nickel cobalt oxide, lithium manganese cobalt oxide, lithium nickel manganese oxide, lithium nickel cobalt manganese oxide (such as LiNi 1 / 3 Co 1 / 3Mn 1 / 3 O2(also can be referred to as NCM 333 ), LiNi 0.5 Co 0.2 Mn 0.3 O2(also can be referred to as NCM 523 ), LiNi 0.5 Co 0.25 Mn 0.25 O2(also can be referred to as NCM 211 ), LiNi 0.6 Co 0.2 Mn 0.2 O2(also can be referred to as NCM 622 ), LiNi 0.8 Co 0.1 Mn 0.1 O2(also can be referred to as NCM 811 ), lithium nickel cobalt aluminum oxide (such as LiNi 0.85 Co 0.15 Al 0.05 O2), and modified compounds thereof.

[0099] In some embodiments, the negative electrode tab can include a negative current collector substrate.

[0100] As an example, the negative current collector substrate can employ a metal foil, a foamed metal, or a composite current collector. For example, as a metal foil, silver surface-treated aluminum or stainless steel, stainless steel, copper, aluminum, nickel, a carbon electrode, or the like can be employed. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloy, or foamed carbon, or the like. The composite current collector can include a polymer material base layer and a metal layer. The composite current collector can be formed by applying a metal material (copper, copper alloy, nickel, nickel alloy, titanium, titanium alloy, silver, and silver alloy, or the like) on a polymer material base material (such as a base material of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, or the like).

[0101] In some embodiments, the negative electrode tab can include a negative current collector substrate and a negative active material layer disposed on at least one surface of the negative current collector substrate.

[0102] As an example, the negative current collector substrate has two surfaces opposite in the thickness direction thereof, and the negative active material layer is disposed on either one or both of the two opposite surfaces of the negative current collector substrate.

[0103] As an example, the negative active material layer can employ a negative active material layer for a battery cell 51 known in the art. As an example, the negative active material layer can include at least one of artificial graphite, natural graphite, soft carbon, hard carbon, a silicon-based material, a tin-based material, and lithium titanate, or the like. The silicon-based material can be selected from at least one of elemental silicon, a silicon oxide compound, a silicon-carbon composite, a silicon-nitrogen composite, and a silicon alloy. The tin-based material can be selected from at least one of elemental tin, a tin oxide compound, and a tin alloy. However, the present disclosure is not limited to these materials, and other conventional materials that can be used as a battery negative active material layer can also be used. These negative active material layers can be used alone only one or in combination of two or more.

[0104] In some embodiments, the material of the positive current collector substrate can be aluminum, and the material of the negative current collector substrate can be copper.

[0105] In some embodiments, the separator is a separator film. The present disclosure does not have a particular limitation on the type of separator film, and any known porous structure separator film having good chemical stability and mechanical stability can be used.

[0106] As an example, the main material of the separator film can be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic. The separator film can be a single layer film or a multi-layer composite film, and is not particularly limited. When the separator film is a multi-layer composite film, the materials of the respective layers can be the same or different, and are not particularly limited. The separator can be a separate component located between the positive electrode sheet and the negative electrode sheet, or can be attached to the surface of the positive electrode sheet and / or the surface of the negative electrode sheet while being located between the positive electrode sheet and the negative electrode sheet.

[0107] In some embodiments, the separator is a solid-state electrolyte. The solid-state electrolyte is disposed between the positive electrode sheet and the negative electrode sheet, and functions to transport ions and separate the positive and negative electrodes.

[0108] In some embodiments, the battery cell 51 further includes an electrolyte that functions to conduct ions between the positive and negative electrodes. The type of electrolyte is not particularly limited by the present disclosure and can be selected as desired. The electrolyte can be liquid, gel, or solid.

[0109] As an example, the liquid electrolyte includes an electrolyte salt and a solvent.

[0110] In some embodiments, the electrolyte salt can be selected from at least one of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium perchlorate, lithium hexafluoroarsenate, lithium bisfluorosulfonylimide, lithium bis-trifluoromethanesulfonylimide, lithium trifluoromethanesulfonate, lithium difluorophosphate, lithium difluoro oxalate borate, lithium di-oxalate borate, lithium difluoro di-oxalate phosphate, and lithium tetrafluoro oxalate phosphate.

[0111] In some embodiments, the solvent can be selected from at least one of ethylene carbonate, propylene carbonate, methyl ethyl carbonate, diethyl carbonate, dimethyl carbonate, dipropyl carbonate, methyl propyl carbonate, ethyl propyl carbonate, butylene carbonate, fluoroethylene carbonate, methyl formate, methyl acetate, ethyl acetate, propyl acetate, methyl propionate, ethyl propionate, propyl propionate, methyl butyrate, ethyl butyrate, 1,4-butyrolactone, butanediol sulfone, dimethyl sulfone, methyl ethyl sulfone, and diethyl sulfone. The solvent can also be an ether-based solvent. The ether-based solvent can include one or more of ethylene glycol dimethyl ether, ethylene glycol diethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, 1,3-dioxolane, tetrahydrofuran, methyl tetrahydrofuran, diphenyl ether, and crown ether.

[0112] As an example, the gel electrolyte includes a polymer as a backbone network of the electrolyte, in combination with an ionic liquid-lithium salt.

[0113] As an example, the solid-state electrolyte includes a polymer solid-state electrolyte, an inorganic solid-state electrolyte, and a composite solid-state electrolyte.

[0114] As an example, the polymer solid electrolyte can be a polyether (polyethylene oxide), a polysiloxane, a polycarbonate, a polyacrylonitrile, a polyvinylidene fluoride, a polymethyl methacrylate, a single-ion polymer, a polyionic liquid-lithium salt, a cellulose, or the like.

[0115] As an example, the inorganic solid electrolyte can be one or more of an oxide solid electrolyte (crystalline perovskite, sodium superionic conductor, garnet, amorphous LiPON film), a sulfide solid electrolyte (crystalline lithium superionic conductor (lithium germanium phosphorous sulfide, argyrodite), amorphous sulfide), and a halide solid electrolyte, a nitride solid electrolyte, and a hydride solid electrolyte.

[0116] As an example, the composite solid electrolyte is formed by adding an inorganic solid electrolyte filler to a polymer solid electrolyte.

[0117] In some embodiments, the shape of the electrode assembly can be flat. The battery cell 51 can correspondingly be a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes.

[0118] In some embodiments, the battery cell 51 can further include a shell. The shell is used to encapsulate components such as the electrode assembly and the electrolyte. The shell can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), or an aluminum-plastic film, or the like.

[0119] As an example, the battery cell 51 can be a pouch battery cell or a hard-shell battery cell. The hard-shell battery cell can be a prismatic battery cell, such as a square shell battery cell, a blade-shaped battery cell, a multi-prismatic battery cell. The multi-prismatic battery cell can be a hexagonal prism battery cell, or the like.

[0120] For a plurality of battery cells 51, the battery cells 51 can be arranged at least along a first direction. As shown in FIG. 1, the plurality of battery cells 51 can be divided into a plurality of groups, each group of battery cells 51 being arranged along the x direction, and each group of battery cells being arranged along the y direction, thereby forming an array arrangement of the plurality of battery cells 51. Figure 3 As shown in FIG. 1, the plurality of battery cells 51 can be divided into a plurality of groups, each group of battery cells 51 being arranged along the x direction, and each group of battery cells being arranged along the y direction, thereby forming an array arrangement of the plurality of battery cells 51.

[0121] Each busbar 52 is electrically connected to an adjacent battery cell 51 to achieve series, parallel, or mixed connection between the plurality of battery cells 51. The plurality of busbars 52 can be electrically connected to a plurality of sampling terminals 11 provided on the sampling circuit board 12, thereby obtaining sampling signals at each sampling position. The sampling circuit board 12 can extend along the first direction, as shown in FIG. 1. Figure 3The sampling terminals 11 are parallel to the arrangement direction of each group of battery cells 51. For each group of battery cells, the signal sampling can be performed by one sampling circuit board 12. One end of each sampling circuit board 12 can be electrically connected to the cell monitoring unit control board 23 through a cell contact system (CCS) 13.

[0122] In the present embodiment, the sampling terminals 11 are connected to the busbars 52 for electrically connecting adjacent battery cells 51, so that the busbars 52 connected to each battery cell 51 can be connected to the sampling terminals 11 distributed on the sampling circuit board 12 in proximity, and the sampling circuit board 12 is electrically connected to the cell monitoring unit control board 23 through the cell contact system 13, so that the obtained sampling signals can be reliably transmitted to the cell monitoring unit control board 23.

[0123] Figure 8 is an assembly structure diagram of the plug-in electrical connection structure in some embodiments of the battery device according to the present disclosure. Figure 9 is an exploded structure diagram of the plug-in electrical connection structure in some embodiments of the battery device according to the present disclosure. Figure 10 is a further exploded structure diagram of the plug-in electrical connection structure in some embodiments of the battery device according to the present disclosure. Figure 11 is a structure diagram of the first connector in some embodiments of the battery device according to the present disclosure. Figure 12 is a cross-sectional diagram of the effective electrical contact between the first connection terminal and the second connection terminal in some embodiments of the battery device according to the present disclosure.

[0124] Referring to Figure 6 , Figures 8-10 and Figure 12 , in some embodiments, the first connector 41 is mounted on the battery management unit control board 22 and has a first connection terminal 411 electrically connected to the battery management unit control board 22. The second connector 42 is mounted on the cell monitoring unit control board 23 and has a second connection terminal 421 electrically connected to the cell monitoring unit control board 23. The first connector 41 is plugged into the second connector 42, and the effective electrical contact range L between the first connection terminal 411 and the second connection terminal 421 in the plugging direction is greater than the sum of the maximum manufacturing tolerance of the first connector 41, the maximum manufacturing tolerance of the second connector 42, and the maximum assembly tolerance between the battery management unit control board 22 and the cell monitoring unit control board 23 in the plugging direction.

[0125] In the present embodiment, according to the maximum manufacturing tolerance of the first connector 41 and the second connector 42 respectively and the maximum assembly tolerance between the battery management unit control board 22 and the cell monitoring unit control board 23, by making the effective electrical contact range L of the first connecting terminal 411 of the first connector 41 and the second connecting terminal 421 of the second connector 42 in the plug-in direction not less than the superposition of these tolerances, reliable electrical contact between the connecting terminals can be ensured within the allowable manufacturing and assembly errors, thereby improving the electrical connection reliability of the plug-in electrical connection structure.

[0126] In the embodiment in which the plane in which the surface of the battery management unit control board 22 lies and the plane in which the surface of the cell monitoring unit control board 23 lies intersect perpendicularly, the second connecting terminal 421 can be made perpendicular to the control board plane in which it lies, and the first connecting terminal 411 can be designed in an L shape, one part of which is parallel to the control board plane in which it lies and the other part of which is perpendicular to the plane, so that when the two control boards are arranged perpendicularly, plug-in through the first connector 41 and the second connector 42 can be conveniently performed.

[0127] In some embodiments, the effective electrical contact range L satisfies: L≥1.5mm.

[0128] When the first connector 41 and the second connector 42 are plugged in, the first connecting terminal 411 of the first connector 41 and the second connecting terminal 421 of the second connector 42 can have a certain effective electrical contact range in the plug-in direction. As shown in Figure 12 The plug-in depth of the plug-in peg 4241 and the plug-in cavity 4141 is adjustable, and accordingly the position of electrical contact changes. Figure 12 The distance L corresponds to the maximum plug-in depth, between the position of electrical contact of the first connecting terminal 411 and the second connecting terminal 421 and the end position of the first connecting terminal 411 in the plug-in direction.

[0129] The distribution box 20 can include a bracket 21. In the distribution box 20, the cell monitoring unit control board 23 can be mounted to the bracket 21 and electrically connected with the sampling assembly 10, and the battery management unit control board 22 is mounted to the bracket 21 and electrically connected with the cell monitoring unit control board 23 through the plug-in electrical connection structure 40.

[0130] In Figure 5 In the present embodiment, the locking member 24 on the cell monitoring unit control board 23 can be connected and fixed with the bracket 21, for example, with Figure 7The distribution box body 211 of the support 21 is connected and fixed. The lock accessory 24 can have a certain error in the locked position. By making the effective electrical contact range L not less than 1.5 mm, the plug-in depth in this range can be adjusted, without the need to set other fixed or positioning structures between the first connector 41 and the second connector 42, so that a certain installation allowance can be allowed when the battery management unit control board 22 and the cell monitoring unit control board 23 are respectively connected and fixed with the support 21 through the lock accessory 24, thereby facilitating the installation of the distribution box 20.

[0131] In some embodiments, the effective electrical contact range L satisfies: L≥2 mm.

[0132] In this embodiment, when the battery management unit control board 22 and the cell monitoring unit control board 23 are respectively connected and fixed with the support 21 through the lock accessory 24, a larger installation allowance can be allowed, thereby more facilitating the installation of the distribution box 20.

[0133] Reference Figures 8-10 In some embodiments, the first connector 41 has a plurality of first connection terminals 411, and at least one group of adjacent first connection terminals 411 among the plurality of first connection terminals 411 is provided with a first electrical partition plate 413 between the first pins 412 of the adjacent first connection terminals 411. The second connector 42 has a plurality of second connection terminals 421, and at least one group of adjacent second connection terminals 421 among the plurality of second connection terminals 421 is provided with a second electrical partition plate 423 between the second pins 422 of the adjacent second connection terminals 421.

[0134] The first connection terminals 411 and the second connection terminals 421 can be made of metal or alloy materials (such as copper alloy). The first electrical partition plate 413 and the second electrical partition plate 423 can be made of insulating materials (such as polyimide, FR4, etc.).

[0135] The first electrical partition plate 413 is arranged between the first pins 412 of the adjacent first connection terminals 411, which can electrically isolate the first pins 412 of the adjacent first connection terminals 411 to increase the creepage distance and electrical clearance between the first pins 412 of the adjacent first connection terminals 411, so as to meet the high-voltage application requirements of, for example, 1000V DC. The second electrical partition plate 423 is arranged between the second pins 422 of the adjacent second connection terminals 421, which can electrically isolate the second pins 422 of the adjacent second connection terminals 421 to increase the creepage distance and electrical clearance between the second pins 422 of the adjacent second connection terminals 421, so as to meet the high-voltage application requirements of, for example, 1000V DC.

[0136] Reference Figures 8-10In some embodiments, the first mounting portion M1 is provided with a first through hole 221 and a first solder hole 222 penetrating the battery management unit control board 22. The first connector 41 includes: a first housing 414, a plurality of first connection terminals 411, and a first electrical partition 413. The first housing 414 is disposed on the surface of the first mounting portion M1. The plurality of first connection terminals 411 are disposed on the first housing 414, and each first connection terminal 411 has a first pin 412 exposed outside the first housing 414 and welded to the first solder hole 222. The first electrical partition 413 is connected to or integrally formed with the first housing 414, located between the first pins 412 of at least one set of adjacent first connection terminals 411, and passes through the first through hole 221.

[0137] The first housing 414 can accommodate a plurality of first connection terminals 411 and can be inserted into the structure of the second connector 42. A first electrical partition 413 connected to or integrally formed with the first housing 414 can partially pass through the first through hole 221 to separate adjacent first pins 412. The shape of the first electrical partition 413 can match the shape of the first through hole 221. The first pins 412 can enter the first solder hole 222 and be soldered to the first solder hole 222.

[0138] The first electrical partition 413 may protrude relative to the first housing 414 in at least one direction. For example... Figure 5 , Figures 8-10 As shown, the first electrical partition 413 can Figure 5 The protrusion is opposite to the z-direction and in the x-direction relative to the first housing 414, thus providing effective electrical isolation for the first pin 412 of the adjacent first connection terminal 411 in both directions.

[0139] In this embodiment, the first pin 412 exposed on the first housing 414 is welded to the first weld hole 222 to achieve electrical connection. The first electrical partition 413 connected to or integrally formed with the first housing 414 provides electrical isolation between adjacent first pins 412. By passing through the first through hole 221, it achieves the protection of electrical connection and electrical isolation, while the welding of the first pin 412 and the first weld hole 222 achieves the stable installation of the first housing 414 at the first mounting position M1.

[0140] refer to Figure 10 In some embodiments, the first connector 41 further includes a first soldering foot 415, which is used to limit the first housing 414 at the first mounting portion M1 so that the first pin 412 and the first solder hole 222 can be soldered.

[0141] The first flux foot 415 can mate with the first flux groove 4142 on the first housing 414 and the first flux hole 223 on the first mounting part M1. Figure 10 In the first housing 414, two first welding feet 415 are provided on both sides. Each first welding foot 415 has two inserts that can be inserted and fixed with the two insertion holes and the two first welding holes 223 of the first welding groove 4142.

[0142] In this embodiment, the first housing 414 can be pre-fixed by the limiting function of the first welding foot 415, which facilitates the welding between the first pin 412 and the first welding hole 222, and helps to improve the welding quality and reliability.

[0143] refer to Figure 8 and Figure 11 In some embodiments, the first electrical separator 413 extends beyond the first pin 412 at least in the thickness direction of the battery management unit control board 22; and / or, the second electrical separator 423 extends beyond the second pin 422 at least in the thickness direction of the cell monitoring unit control board 23.

[0144] The thickness direction of the battery management unit control board 22 is in line with... Figure 5 The x-direction is parallel to the thickness of the cell monitoring unit control board 23, and the thickness direction is parallel to the x-direction. Figures 9-11 The first electrical separator 413 extends beyond the first pin 412 not only in the thickness direction of the battery management unit control board 22, but also in the z-direction. The second electrical separator 423 extends beyond the second pin 422 in the thickness direction of the cell monitoring unit control board 23.

[0145] In this embodiment, by making the first electrical separator 413 extend beyond the first pin 412 at least in the thickness direction of the battery management unit control board 22, the creepage distance and electrical clearance between adjacent first pins 412 can be increased, further improving reliability; by making the second electrical separator 423 extend beyond the second pin 422 at least in the thickness direction of the cell monitoring unit control board 23, the creepage distance and electrical clearance between adjacent second pins 422 can be increased, further improving reliability.

[0146] refer to Figure 9In some embodiments, the first housing 414 has a plurality of insertion cavities 4141, and the plurality of first connection terminals 411 are respectively partially disposed within the plurality of insertion cavities 4141. The second connector 42 includes a second housing 424 and a plurality of second connection terminals 421. The second housing 424 is disposed on the surface of the second mounting portion M2 and has a plurality of plugs 4241, the plurality of plugs 4241 being configured to be inserted into the plurality of insertion cavities 4141 respectively. The plurality of second connection terminals 421 are disposed on the second housing 424 and are respectively partially disposed within the plurality of plugs 4241. The plurality of second connection terminals 421 are configured to make electrical contact with the plurality of first connection terminals 411 respectively when the plurality of plugs 4241 are respectively inserted into the plurality of insertion cavities 4141.

[0147] like Figure 10 and Figures 8-10 As shown, the second housing 424 has multiple plugs 4241, each containing a second connection terminal 421. When the multiple plugs 4241 are plugged into the multiple insertion cavities 4141, the multiple second connection terminals 421 make electrical contact with the multiple first connection terminals 411 located within the multiple insertion cavities 4141. Adjacent insertion cavities 4141 can be separated by partitions 4143 to provide electrical isolation between adjacent second connection terminals 421.

[0148] In this embodiment, the insertion and engagement of the plug 4241 and the insertion cavity 4141 can achieve a more reliable and stable electrical contact between the first connection terminal 411 and the second connection terminal 421, thereby improving the stability of the electrical connection.

[0149] refer to Figure 5 In some embodiments, the second mounting portion M2 is provided with a second through hole 231 and a second solder hole 232 penetrating the cell monitoring unit control board 23. Each second connection terminal 421 has a second pin 422 exposed in the second housing 424 and soldered to the second solder hole 232. The second connector 42 further includes a second electrical partition 423, which is connected to or integrally formed with the second housing 424, located between the second pins 422 of at least one group of adjacent second connection terminals 421, and passes through the second through hole 231.

[0150] The second housing 424 can accommodate multiple second connection terminals 421 and can be plugged into the structure of the first connector 41. A second electrical partition 423, connected to or integrally formed with the second housing 424, can partially pass through the second through-hole 231 to separate adjacent second pins 422. The shape of the second electrical partition 423 can match the shape of the second through-hole 231. The second pins 422 can enter and be soldered into the second solder holes 232.

[0151] The second electrical partition 423 may protrude relative to the second housing 424 in at least one direction. For example... Figures 8-10 , Figure 5 As shown, the second electrical partition 423 can Figure 10 The second pin 422 of the adjacent second connection terminal 421 protrudes in the x direction relative to the second housing 424, thus forming effective electrical isolation in this direction for the second pins 422 of the adjacent second connection terminal 421.

[0152] In this embodiment, the second pin 422 exposed on the second housing 424 is welded to the second welding hole 232 to achieve electrical connection. The second electrical partition 423 connected to or integrally formed with the second housing 424 provides electrical isolation between adjacent second pins 422. By passing through the second through hole 231, the second housing 424 is stably installed at the second mounting position M2 while achieving the protection of electrical connection and electrical isolation.

[0153] refer to Figure 10 In some embodiments, the second connector 42 further includes a second soldering foot 425, which is used to limit the second housing 424 in the second mounting portion M2 so that the second pin 422 and the second solder hole 232 can be soldered.

[0154] The second soldering foot 425 can mate with the second soldering groove 4242 on the second housing 424 and the second soldering hole 233 on the second mounting part M2. Figures 3-12 In the second housing 424, two second welding feet 425 are provided on both sides. Each second welding foot 425 has two inserts that can be inserted and fixed with the two insertion holes and two second welding holes 233 of the second welding groove 4242.

[0155] In this embodiment, the second welding foot 425 can be used to pre-fix the second housing 424, thereby facilitating the welding between the second pin 422 and the second welding hole 232, which is beneficial to improving the welding quality and reliability.

[0156] In one aspect of this disclosure, an electrical device is provided, including the battery device 50 of any of the foregoing embodiments.

[0157] In the present embodiment, the aforementioned battery device can achieve a more optimal capacity or size, thereby facilitating the performance and size of an electrical equipment employing the battery device of the aforementioned embodiment.

[0158] In one aspect of the present disclosure, a power distribution box is provided, comprising a box body (i.e. power distribution box body 211) and a battery management unit control board 22 and a cell monitoring unit control board 23 arranged in the box body, the battery management unit control board 22 and the cell monitoring unit control board 23 being directly connected by a plug-in electrical connection structure 40. One side of the battery management unit control board 22 is adjacent to the cell monitoring unit control board 23, and the plane in which the surface of the battery management unit control board 22 lies intersects the plane in which the surface of the cell monitoring unit control board 23 lies. The plug-in electrical connection structure 40 comprises a first connector 41 and a second connector 42, the first connector 41 being mounted at a first mounting position M1 on the surface of the battery management unit control board 22 adjacent to the one side, and the second connector 42 being mounted at a second mounting position M2 on the surface of the cell monitoring unit control board 23 opposite to the first connector 41.

[0159] The specific structure of the various embodiments of the power distribution box 20 can refer to the various embodiments of the battery device 50 described above, and will not be described here again.

[0160] In the present embodiment, the power distribution box 20 integrates the battery management unit control board 22 and the cell monitoring unit control board 23, and the battery management unit control board 22 and the cell monitoring unit control board 23 are electrically connected by a plug-in electrical connection structure, which can eliminate the wiring harness for connecting the cell monitoring unit control board 23 and the battery management unit control board 22 respectively. Therefore, compared with the scheme of connecting the battery management system and the cell sampling monitoring assembly by a wiring harness in the related art, the integration of the battery management unit control board 22 and the cell monitoring unit control board 23 in the power distribution box 20 in the present embodiment can eliminate the internal space occupied by the wiring harness, thereby effectively saving the internal space of the battery device 50 for the battery device 50 in which the power distribution box 20 is arranged, so as to facilitate the capacity of the battery device 50 and reduce the size of the battery device 50.

[0161] Furthermore, by making the plane in which the surface of the battery management unit control board 22 lies intersect the plane in which the surface of the cell monitoring unit control board 23 lies, and by making one side of the battery management unit control board 22 adjacent to the cell monitoring unit control board 23, the first connector 41 and the second connector 42 can be conveniently arranged adjacent to and plugged into each other, which not only makes the structure more compact, but also eliminates the need for a connecting cable.

[0162] In some specific embodiments, for example,​ As shown, the battery device 50 comprises a sampling assembly 10, a distribution box 20, a plurality of battery cells 51 arranged along a first direction, and a plurality of busbars 52. The sampling assembly 10 has a plurality of sampling terminals 11 respectively connected with a plurality of sampling positions of the battery device 50. The distribution box 20 comprises a bracket 21, a battery management unit control board 22, and a cell monitoring unit control board 23. The cell monitoring unit control board 23 is mounted on the bracket 21 and electrically connected with the sampling assembly 10. The battery management unit control board 22 is mounted on the bracket 21 and directly connected with the cell monitoring unit control board 23 through a plug-in electrical connection structure 40.

[0163] The plurality of busbars 52 are respectively electrically connected with the plurality of sampling terminals 11, and each busbar 52 is respectively electrically connected with adjacent battery cells 51. The sampling assembly 10 comprises a sampling circuit board 12 electrically connected with the cell monitoring unit control board 23 through a cell connection assembly 13, and the plurality of sampling terminals 11 are arranged on the sampling circuit board 12.

[0164] The plug-in electrical connection structure 40 comprises a first connector 41 and a second connector 42. The first connector 41 is mounted on the battery management unit control board 22, and the second connector 42 is mounted on the cell monitoring unit control board 23. The first connector 41 is plugged with the second connector 42, and the effective electrical contact range L of the first connector 41 and the second connector 42 in the plug-in direction is 2 mm.

[0165] The first connector 41 has a plurality of first connection terminals 411 electrically connected with the battery management unit control board 22, and at least one group of adjacent first connection terminals 411 of the plurality of first connection terminals 411 is provided with a first electrical partition plate 413 between first pins 412. The second connector 42 has a plurality of second connection terminals 421 electrically connected with the cell monitoring unit control board 23, and at least one group of adjacent second connection terminals 421 of the plurality of second connection terminals 421 is provided with a second electrical partition plate 423 between second pins 422.

[0166] One side edge of the battery management unit control board 22 is adjacent to the cell monitoring unit control board 23, and the surface plane of the battery management unit control board 22 intersects with the surface plane of the cell monitoring unit control board 23.

[0167] The first connector 41 is mounted on a first mounting position M1 of the surface of the battery management unit control board 22 adjacent to the one side edge, and the second connector 42 is mounted on a second mounting position M2 of the surface of the cell monitoring unit control board 23 opposite to the first connector 41.

[0168] The first mounting site M1 is provided with a first through hole 221 and a first solder hole 222 penetrating the battery management unit control board 22. The first connector 41 includes a first housing 414, a plurality of first connection terminals 411, a first electrical partition plate 413, and a first soldering foot 415. The first housing 414 is arranged on the surface of the first mounting site M1. The plurality of first connection terminals 411 are arranged in the first housing 414, and each first connection terminal 411 has a first pin 412 exposed to the first housing 414 and soldered to the first solder hole 222. The first electrical partition plate 413 is connected or integrally formed with the first housing 414, located between the first pins 412 of at least one group of adjacent first connection terminals 411 in the plurality of first connection terminals 411, and penetrates the first through hole 221. The first soldering foot 415 is used to limit the first housing 414 in the first mounting site M1 so that the first pin 412 and the first solder hole 222 are soldered.

[0169] The first housing 414 has a plurality of insertion cavities 4141, and the plurality of first connection terminals 411 are respectively partially arranged in the plurality of insertion cavities 4141. The second connector 42 includes a second housing 424, a plurality of second connection terminals 421, a second electrical partition plate 423, and a second soldering foot 425. The second housing 424 is arranged on the surface of the second mounting site M2 and has a plurality of insertion plugs 4241 configured to be respectively inserted into the plurality of insertion cavities 4141. The plurality of second connection terminals 421 are arranged in the second housing 424 and are respectively partially arranged in the plurality of insertion plugs 4241.

[0170] The plurality of second connection terminals 421 are configured to be respectively in electrical contact with the plurality of first connection terminals 411 in a state where the plurality of insertion plugs 4241 are respectively inserted into the plurality of insertion cavities 4141.

[0171] The second mounting site M2 is provided with a second through hole 231 and a second solder hole 232 penetrating the cell monitoring unit control board 23, and each second connection terminal 421 has a second pin 422 exposed to the second housing 424 and soldered to the second solder hole 232. The second electrical partition plate 423 is connected or integrally formed with the second housing 424, located between the second pins 422 of at least one group of adjacent second connection terminals 421 in the plurality of second connection terminals 421, and penetrates the second through hole 231. The second soldering foot 425 is used to limit the second housing 424 in the second mounting site M2 so that the second pin 422 and the second solder hole 232 are soldered.

[0172] So far, the embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein according to the above description.

[0173] Although some specific embodiments of the present disclosure have been described in detail through examples, those skilled in the art should understand that the above examples are only for illustration, not for limiting the scope of the present disclosure. Those skilled in the art should understand that the above embodiments can be modified or some technical features can be replaced equivalently without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A battery device (50) characterized by, The power distribution box (20) comprises a box body and a battery management unit control board (22) and a cell monitoring unit control board (23) arranged in the box body, the battery management unit control board (22) and the cell monitoring unit control board (23) are directly connected by a plug-in electrical connection structure (40). The one side edge of the battery management unit control board (22) is adjacent to the cell monitoring unit control board (23), and the surface plane of the battery management unit control board (22) intersects with the surface plane of the cell monitoring unit control board (23). The plug-in electrical connection structure (40) comprises a first connector (41) and a second connector (42), the first connector (41) is installed at a first mounting position (M1) adjacent to the one side edge on the surface of the battery management unit control board (22), and the second connector (42) is installed at a second mounting position (M2) opposite to the first connector (41) on the surface of the cell monitoring unit control board (23).

2. The battery device (50) according to claim 1, characterized in that The first connector (41) is installed on the battery management unit control board (22) and has a first connection terminal (411) electrically connected with the battery management unit control board (22); the second connector (42) is installed on the cell monitoring unit control board (23) and has a second connection terminal (421) electrically connected with the cell monitoring unit control board (23); The first connector (41) and the second connector (42) are plugged, and the effective electrical contact range L of the first connection terminal (411) and the second connection terminal (421) in the plug-in direction is greater than the sum of the maximum manufacturing tolerance of the first connector (41), the maximum manufacturing tolerance of the second connector (42), and the maximum assembly tolerance between the battery management unit control board (22) and the cell monitoring unit control board (23) in the plug-in direction.

3. The battery device (50) according to claim 2, characterized in that The effective electrical contact range L satisfies: L≥1.5mm.

4. The battery device (50) according to claim 3, characterized in that The effective electrical contact range L satisfies: L≥2mm.

5. The battery device (50) according to claim 2, characterized in that The first connector (41) has a plurality of first connection terminals (411), and at least one group of adjacent first connection terminals (411) in the plurality of first connection terminals (411) is provided with a first electrical partition plate (413) between first pins (412); and / or The second connector (42) has a plurality of second connection terminals (421), and at least one group of adjacent second connection terminals (421) in the plurality of second connection terminals (421) is provided with a second electrical partition plate (423) between second pins (422).

6. The battery device (50) according to claim 5, characterized in that The first electrical partition plate (413) at least exceeds the first pin (412) in the thickness direction of the battery management unit control board (22); and / or the second electrical partition plate (423) at least exceeds the second pin (422) in the thickness direction of the cell monitoring unit control board (23).

7. The battery device (50) according to claim 1, characterized in that The first mounting site (M1) is provided with a first through hole (221) and a first welding hole (222) penetrating through the battery management unit control board (22), and the first connector (41) comprises: a first shell (414) arranged on the surface of the first mounting site (M1); a plurality of first connection terminals (411) arranged in the first shell (414), each first connection terminal (411) having a first pin (412) exposed to the first shell (414) and welded with the first welding hole (222); and a first electrical partition plate (413) connected with or integrally formed with the first shell (414), located between the first pins (412) of at least one group of adjacent first connection terminals (411) in the plurality of first connection terminals (411), and penetrating through the first through hole (221).

8. The battery device (50) according to claim 7, characterized in that The first shell (414) has a plurality of plug-in cavities (4141), and the plurality of first connection terminals (411) are respectively partially arranged in the plurality of plug-in cavities (4141), and the second connector (42) comprises: a second shell (424) arranged on the surface of the second mounting site (M2) and having a plurality of plug-in pegs (4241) configured to be respectively plugged into the plurality of plug-in cavities (4141); and a plurality of second connection terminals (421) arranged in the second shell (424) and partially arranged in the plurality of plug-in pegs (4241); wherein the plurality of second connection terminals (421) are configured to be in electrical contact with the plurality of first connection terminals (411) respectively when the plurality of plug-in pegs (4241) are respectively plugged into the plurality of plug-in cavities (4141).

9. The battery device (50) according to claim 8, characterized in that The second mounting site (M2) is provided with a second through hole (231) and a second welding hole (232) penetrating through the cell monitoring unit control board (23), each second connection terminal (421) has a second pin (422) exposed to the second shell (424) and welded with the second welding hole (232), and the second connector (42) further comprises: a second electrical partition plate (423) connected with or integrally formed with the second shell (424), located between the second pins (422) of at least one group of adjacent second connection terminals (421) in the plurality of second connection terminals (421), and penetrating through the second through hole (231).

10. The battery device (50) according to claim 9, characterized in that The first connector (41) further comprises a first soldering pin (415) for limiting the first shell (414) in the first mounting site (M1) so that the first pin (412) and the first welding hole (222) are welded; and / or The second connector (42) further comprises a second soldering pin (425) for limiting the second shell (424) in the second mounting site (M2) so that the second pin (422) and the second welding hole (232) are welded.

11. The battery device (50) according to claim 1, characterized in that Further comprising: A sampling assembly (10) has a plurality of sampling terminals (11) connected with a plurality of sampling positions of the battery device (50) respectively; A plurality of battery monomers (51) arranged at least along a first direction; A plurality of busbars (52) are electrically connected with the plurality of sampling terminals (11) respectively, and each busbar (52) is electrically connected with adjacent battery monomers (51) respectively; The sampling assembly (10) includes a sampling circuit board (12) electrically connected with the battery core monitoring unit control board (23) through a battery core connecting assembly (13), and the plurality of sampling terminals (11) are arranged on the sampling circuit board (12).

12. An electrical device, characterized by Comprise: The battery device (50) according to any one of claims 1-11.

13. A power distribution box, characterized by, Comprise a box body, and a battery management unit control board (22) and a battery core monitoring unit control board (23) arranged in the box body, the battery management unit control board (22) and the battery core monitoring unit control board (23) are directly inserted and electrically connected through a plug-in electrical connection structure (40); Wherein, one side of the battery management unit control board (22) is adjacent to the battery core monitoring unit control board (23), and the plane where the surface of the battery management unit control board (22) is located intersects with the plane where the surface of the battery core monitoring unit control board (23) is located; The plug-in electrical connection structure (40) includes a first connector (41) and a second connector (42), the first connector (41) is installed at a first mounting position (M1) adjacent to the one side of the surface of the battery management unit control board (22), and the second connector (42) is installed at a second mounting position (M2) opposite to the first connector (41) of the surface of the battery core monitoring unit control board (23).

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