Power distribution unit, battery pack and electric equipment

Abstract

The invention relates to a power distribution unit, a battery pack and electric equipment, the power distribution unit comprises a shell and a power distribution unit main body arranged in the shell, the shell is suitable for being arranged in a box body of the battery pack, the power distribution unit has a first working mode and a second working mode, and in the first working mode, the power distribution unit main body is arranged in the shell; in the first working mode, the power distribution unit is electrically connected with one of the multiple battery cell modules of the battery pack so as to charge or discharge the single battery cell module, and in the second working mode, the power distribution unit connects the multiple battery cell modules in the battery pack in series into a whole for charging or discharging. According to the technical scheme, because the power distribution unit has two different working modes, the battery pack applying the power distribution unit can have different working modes, the compatibility of the battery pack is relatively high, and the battery pack can be suitable for working conditions with different charge and discharge voltages.

Description

Technical Field

[0001] The present disclosure relates to the field of battery technology, and in particular, to a power distribution unit, a battery pack, and an electrical device. Background Art

[0002] For example, a battery pack is a device used to provide energy to electrical equipment (such as a vehicle) and is a core component of the electrical equipment. However, in the related art, for electrical equipment (such as a vehicle), a battery pack is usually only applicable to working conditions with fixed charging and discharging voltages and is not compatible with working conditions with different charging and discharging voltages. Summary of the invention

[0003] The present disclosure provides a power distribution unit, a battery pack, and an electrical device to at least partially overcome the problems existing in the related art.

[0004] According to a first aspect of the present disclosure, there is provided a power distribution unit, comprising a housing and a power distribution unit body disposed in the housing, wherein the housing is adapted to be disposed inside a box of a battery pack;

[0005] The power distribution unit has a first working mode and a second working mode. In the first working mode, the power distribution unit is electrically connected to one of the multiple battery cell modules of the battery pack to realize charging or discharging of the single battery cell module;

[0006] In the second working mode, the power distribution unit connects the multiple battery modules in the battery pack in series as a whole for charging or discharging; or,

[0007] The first operating mode includes a first charging mode;

[0008] In the first charging mode, the power distribution unit electrically connects an external charging system and one of the plurality of battery cell modules.

[0009] Optionally, the first working mode includes a first discharge mode, in which the power distribution unit electrically connects a device body of the electrical device and one of the plurality of battery modules; or,

[0010] The second working mode includes a second charging mode, in which the power distribution unit connects the multiple battery modules in the battery pack in series as a whole, and electrically connects the multiple battery modules in series to an external charging system, or,

[0011] The second working mode includes a second discharge mode. In the second discharge mode, the power distribution unit connects the multiple battery modules in the battery pack in series as a whole, and electrically connects the multiple battery modules connected in series to the device body of the electrical device.

[0012] Optionally, the power distribution unit further includes a first circuit, a second circuit and a third circuit;

[0013] The first end of the first circuit is used to be connected to the positive electrode of the external charging system, and the second end of the first circuit is used to be connected to the positive electrode of the first battery cell module among the multiple battery cell modules;

[0014] The first end of the second circuit is used to be connected to the negative electrode of the external charging system, and the second end of the second circuit is used to be connected to the negative electrode of the second battery cell module among the multiple battery cell modules;

[0015] The first end of the third circuit is used to be connected to the negative electrode of the first battery cell module, and the second end of the third circuit is used to be connected to the positive electrode of the second battery cell module;

[0016] The second working mode includes a second charging mode, in which the first circuit, the second circuit, the third circuit, the external charging system, the first battery module and the second battery module are connected in series. Optionally, the power distribution unit further includes a first circuit and a fourth circuit;

[0017] The first end of the first circuit is used to be connected to the positive electrode of the external charging system, and the second end of the first circuit is used to be connected to the positive electrode of the first battery cell module among the multiple battery cell modules;

[0018] The first end of the fourth circuit is used to be connected to the negative electrode of the external charging system, and the second end of the fourth circuit is used to be connected to the negative electrode of the first battery module;

[0019] The first working mode includes a first sub-charging mode, in which the first circuit, the fourth circuit, the external charging system and the first battery module are connected in series. Optionally, the power distribution unit also includes a second circuit and a fifth circuit;

[0020] The first end of the second circuit is used to be connected to the negative electrode of the external charging system, and the second end of the second circuit is used to be connected to the negative electrode of the second battery cell module among the multiple battery cell modules;

[0021] The first end of the fifth circuit is used to be connected to the negative electrode of the external charging system, and the second end of the fifth circuit is used to be connected to the positive electrode of the second battery module;

[0022] The first working mode includes a second sub-charging mode, in which the second circuit, the fifth circuit, the external charging system and the second battery module are connected in series. Optionally, the power distribution unit further includes a third circuit, a sixth circuit and a seventh circuit;

[0023] The first end of the third circuit is used to be connected to the negative electrode of the first battery cell module among the multiple battery cell modules, and the second end of the third circuit is used to be connected to the positive electrode of the second battery cell module among the multiple battery cell modules;

[0024] The first end of the sixth circuit is used to be connected to the positive electrode of the device body of the electric device, and the second end of the sixth circuit is used to be connected to the positive electrode of the first battery module;

[0025] The first end of the seventh circuit is used to be connected to the negative electrode of the device body of the electric device, and the second end of the seventh circuit is used to be connected to the negative electrode of the second battery module;

[0026] The second working mode includes a second discharge mode, in which the third circuit, the sixth circuit, the seventh circuit, the first battery module, the second battery module and the device body are connected in series. Optionally, the power distribution unit also includes a sixth circuit and an eighth circuit;

[0027] The first end of the sixth circuit is used to be connected to the positive electrode of the device body of the electrical device, and the second end of the sixth circuit is used to be connected to the positive electrode of the first battery cell module among the at least two battery cell modules;

[0028] The first end of the eighth circuit is used to be connected to the negative electrode of the device body of the electrical device, and the second end of the eighth circuit is used to be connected to the negative electrode of the first battery module;

[0029] The first working mode includes a first sub-discharging mode. In the first sub-discharging mode, the sixth circuit, the eighth circuit, the first battery cell module and the device body are connected in series.

[0030] Optionally, the power distribution unit further includes a seventh circuit and a ninth circuit;

[0031] The first end of the seventh circuit is used to be connected to the negative electrode of the device body of the electrical device, and the second end of the seventh circuit is used to be connected to the negative electrode of the second battery cell module among the two battery cell modules;

[0032] The first end of the ninth circuit is used to be connected to the positive electrode of the device body of the electric device, and the second end of the ninth circuit is used to be connected to the positive electrode of the second battery module;

[0033] The first operating mode includes a second sub-discharging mode. In the second sub-discharging mode, the seventh circuit, the ninth circuit, the second battery cell module and the device body are connected in series.

[0034] Optionally, the power distribution unit includes a disconnecting device;

[0035] The disconnecting device is used to connect or disconnect the circuit between the battery pack, the external charging system, and the device body of the electrical equipment, so that the power distribution unit can switch between the first working mode and the second working mode.

[0036] Optionally, the disconnecting device includes a plurality of relays, and the plurality of relays are arranged on corresponding circuits between the battery pack, the external charging system, and the device body;

[0037] Each of the relays is used to control the connection or disconnection of a corresponding circuit.

[0038] Optionally, the disconnecting device includes a composite switch, which is used to control the connection or disconnection of multiple circuits arranged between the battery pack, the external charging system, and the device body.

[0039] Optionally, the power distribution unit body further includes at least one of a collection device and a circuit protection device;

[0040] Wherein, the circuit protection device is used to disconnect the circuit between the battery pack, the external charging system, and the device body of the power-consuming device when the battery pack fails;

[0041] The acquisition device is used to acquire information of current and / or voltage in the battery pack.

[0042] Optionally, the circuit protection device includes an active fuse, and / or an active and passive fuse.

[0043] Optionally, the acquisition device includes a current sensor, and the current sensor is used to monitor the current of a related circuit in the battery pack; and / or,

[0044] The acquisition device includes a voltage sensor, and the voltage sensor is used to monitor the voltage of the relevant circuit in the battery pack.

[0045] Optionally, at least part of the housing is configured as a heat exchange plate, or the power distribution unit comprises a heat exchange plate disposed on the housing;

[0046] The power distribution unit body exchanges heat with the heat exchange structure of the battery pack through the heat exchange plate.

[0047] Optionally, the power distribution unit includes a disconnecting device;

[0048] The disconnecting device is used to connect or disconnect the circuit between the battery pack, the external charging system, and the device body of the power-consuming device, so that the power distribution unit can switch between the first working mode and the second working mode;

[0049] The disconnecting device comprises a relay, and a contact of the relay is in contact with the heat exchange plate.

[0050] Optionally, in the height direction of the battery pack, the housing includes a first housing and a second housing that are stacked;

[0051] The power distribution unit body includes a first portion located in the first housing and a second portion located in the second housing;

[0052] The first shell is provided with a first electrical connector, the second shell is provided with a second electrical connector, and the first electrical connector and the second electrical connector are used to electrically connect the first part and the second part.

[0053] Optionally, the power distribution unit includes a battery cell module connector, a charging end connector and a discharging end connector;

[0054] The cell module connector is used to electrically connect to the cell module;

[0055] The charging terminal connector is used to electrically connect to an external charging system;

[0056] The discharge end connector is used to be electrically connected to the device body of the electrical device;

[0057] At least one of the battery cell module connector, the charging end connector, and the discharging end connector is configured as a quick-plug connector.

[0058] According to a second aspect of the present disclosure, there is provided a battery pack, comprising a battery cell module, a box body, and a power distribution unit as described above;

[0059] The battery cell module and the shell are both arranged inside the box;

[0060] The battery pack is used to be electrically connected to an external charging system or a device body of an electric device.

[0061] Optionally, there are multiple battery cell modules, and the operating voltage of each battery cell module is 400V.

[0062] According to a third aspect of the present disclosure, there is provided an electrical device, comprising a device body and a battery pack as described above, wherein the battery pack is mounted on the device body and is used to supply power to the device body.

[0063] Optionally, the electrical equipment is a vehicle, and a body structure of the vehicle is a part of the box of the battery pack.

[0064] Through the above technical solution, since the distribution unit has two different working modes (i.e., the first working mode and the second working mode), the battery pack using the distribution unit can have different working modes, and the battery pack has high compatibility. Compared with the technical solutions in the related art that the battery pack is usually only suitable for working conditions with fixed charging and discharging voltages, the distribution unit provided in the present invention can enable the battery pack to be suitable for working conditions with different charging and discharging voltages, that is, it can be compatible with a variety of voltage platforms with different voltages, which is conducive to convenient daily use.

[0065] When the power distribution unit is in the first working mode, any one of the multiple battery modules can be charged or discharged individually. At this time, the battery pack can be suitable for a charging platform with a lower charging voltage, so that it can have a conventional charging mode; and when the power distribution unit is in the second working mode, that is, when some or all of the multiple battery modules are connected in series, the battery pack can be suitable for a charging platform with a higher charging voltage, so that it can have a fast charging mode. In other words, the battery pack provided by the present disclosure can have a charging platform suitable for different voltages, that is, it can be compatible with voltage platforms of multiple voltages, which is conducive to daily use. In addition, since the multiple battery modules in the battery pack can have different working modes, the number of battery modules to be discharged can also be different in different working modes. Therefore, the battery pack can have different discharge modes, and different voltage power supply modes can be provided to the electric drive parts of the electrical equipment.

[0066] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0068] Figure 1 is a front view schematic diagram of a power distribution unit provided in an exemplary embodiment of the present disclosure.

[0069] Figure 2 1 is a bottom view schematically showing a power distribution unit provided in accordance with an exemplary embodiment of the present disclosure.

[0070] Figure 3 is a schematic side view of a power distribution unit provided in accordance with an exemplary embodiment of the present disclosure.

[0071] Figure 4 It is a front view schematic diagram of a partial structure of a power distribution unit provided by an exemplary embodiment of the present disclosure, wherein the second shell is not shown.

[0072] Figure 51 is a schematic front view of a partial structure of a power distribution unit provided in a second exemplary embodiment of the present disclosure, wherein the second shell is not shown.

[0073] Figure 6 It is a front view schematic diagram of a partial structure of a distribution unit provided in an exemplary embodiment of the present disclosure, wherein the first circuit is schematically shown with blue lines, the third circuit is schematically shown with red lines, the second circuit is schematically shown with green lines, and the battery cell module is schematically shown.

[0074] Figure 7 It is a front view schematic diagram of a partial structure of a power distribution unit provided in an exemplary embodiment of the present disclosure, wherein the sixth circuit is schematically shown with blue lines, the third circuit is schematically shown with red lines, the seventh circuit is schematically shown with green lines, and the battery cell module is schematically shown.

[0075] Figure 8 It is a front view schematic diagram of a partial structure of a power distribution unit provided in an exemplary embodiment of the present disclosure, wherein the sixth circuit is schematically shown with blue lines, the eighth circuit is schematically shown with red lines, and the battery cell module is schematically shown.

[0076] Fig. 9 It is a front view schematic diagram of a partial structure of a power distribution unit provided in an exemplary embodiment of the present disclosure, wherein the seventh circuit is schematically shown with green lines, the ninth circuit is schematically shown with red lines, and the battery cell module is schematically shown.

[0077] Fig.10 yes Figure 4 A is an enlarged view of the middle image.

[0078] Fig.11 is a bottom view schematically showing a power distribution unit provided by an exemplary embodiment of the present disclosure, wherein the heat exchange plate is not shown.

[0079] Fig.12 yes Fig.11 Enlarged view of B.

[0080] Fig.13 It is a three-dimensional structural schematic diagram of a partial structure of a power distribution unit provided by an exemplary embodiment of the present disclosure.

[0081] Fig.14 is a three-dimensional structural diagram of a partial structure of a power distribution unit provided by an exemplary embodiment of the present disclosure, wherein Fig.13 Different perspective.

[0082] Fig.15 yes Fig.14 Enlarged view of C in the middle.

[0083] Fig.16 is a schematic cross-sectional view of a battery pack provided in accordance with an exemplary embodiment of the present disclosure.

[0084] Description of Reference Numerals

[0085] 1000-battery pack; 100-power distribution unit; 101-box; 102-cell module; 103-first cell module; 104-second cell module; 1-shell; 11-first shell; 12-second shell; 13-first electrical connector; 14-second electrical connector; 15-copper column; 16-conductive insert; 2-power distribution unit body; 3-circuit; 31-first circuit; 32-second circuit; 33-third circuit; 34-sixth circuit; 35-seventh circuit; 36-eighth circuit; 37-ninth circuit; 4-breaking device; 41-relay; 42-contact; 43-compound switch; 5-collection device; 51-current sensor; 52-voltage sensor; 6-circuit protection device; 61-active fuse; 62-active and passive fuse; 7-heat exchange plate; 8-cell module connector; 9-charging end connector; 10-discharging end connector. DETAILED DESCRIPTION

[0086] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0087] In the present disclosure, unless otherwise stated, the directions or positional relationships indicated by the directional words such as "upper", "lower", "left", "right", etc. are defined based on the drawing directions shown in the accompanying drawings. They are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, specific directional structure and operation. Therefore, they cannot be understood as limitations on the present disclosure. The terms "inside" and "outside" refer to the inside and outside of the corresponding structural contours. "First direction" and "second direction" can be found in Figure 1 and Figure 2 The first direction and the second direction are shown.

[0088] In addition, it should be noted that the terms used, such as "first", "second", etc., are used to distinguish one element from another element, and do not have order or importance. In addition, in the description with reference to the drawings, the same number in different drawings represents the same element.

[0089] In the description of the present disclosure, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "connected", and "installed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0090] As mentioned above, in the related art, the battery pack is usually only applicable to the working conditions with fixed charging and discharging voltages, and is not compatible with the working conditions with different charging and discharging voltages.

[0091] In view of this, if Figures 1 to 15 As shown, according to the first aspect of the present disclosure, there is provided a power distribution unit 100, comprising a shell 1 and a power distribution unit body 2 arranged in the shell 1, the shell 1 is suitable for being arranged inside a box body 101 of a battery pack 1000, the power distribution unit 100 has a first working mode and a second working mode, in the first working mode, the power distribution unit 100 is electrically connected to one of a plurality of battery cell modules 102 of the battery pack 1000 to realize charging or discharging of a single battery cell module 102, in the second working mode, the power distribution unit 100 connects a plurality of battery cell modules 102 in the battery pack 1000 in series as a whole for charging or discharging.

[0092] When the above-mentioned power distribution unit 100 is applied to the battery pack 1000, the above-mentioned power distribution unit 100 can realize the connection between the battery cell module 102 in the battery pack 1000 and the external charging system, and can realize the electrical connection between the battery cell module 102 and the device body of the electrical equipment, so that the battery cell module 102 in the battery pack 1000 can be discharged to the outside and the battery cell module 102 in the battery pack 1000 can be charged.

[0093] For example, when the above-mentioned distribution unit 100 is applied to the battery pack 1000 of a vehicle, through the above-mentioned distribution unit 100, on the one hand, the electrical connection between the battery cell module 102 and the equipment body of the electrical equipment (such as the vehicle's driving motor, or the vehicle's low-voltage system, etc.) can be realized. In this way, the battery cell module 102 can realize the power supply of the vehicle's low-voltage system to meet the daily needs of the vehicle, and can also realize the power supply of the driving motor to meet the driving needs of the vehicle.

[0094] In addition, by connecting the power distribution unit 100 to an external charging system (such as a charging pile, etc.), the charging requirements of the vehicle can also be met.

[0095] In the above-mentioned distribution unit 100, since the distribution unit body 2 is arranged in the shell 1 of the distribution unit 100, and the shell 1 is suitable for being arranged inside the box 101 of the battery pack 100, in other words, the distribution unit 100 adopts an integrated design. In this way, by reasonably designing the installation positions of various components in the distribution unit body 2 (such as the disconnecting device 4, the collecting device 5 and the circuit protection device 6 described below) in the shell 1, on the one hand, the space utilization rate of the distribution unit 100 can be improved, which is beneficial to reducing the volume of the entire distribution unit 100 and reducing the weight of the entire distribution unit 100; on the other hand, it can also improve the assembly efficiency of the distribution unit 100 in the battery pack 1000.

[0096] In addition, by reasonably designing the installation positions of various components in the distribution unit 100 in the shell 1, the various components can be arranged in an orderly manner in the shell 1. This can facilitate the assembly of various components in the distribution unit 100 on the one hand, and on the other hand, it can also improve the maintenance convenience of various components in the distribution unit 100.

[0097] Through the above technical solution, since the distribution unit 100 has two different working modes (i.e., the first working mode and the second working mode), the battery pack 1000 using the distribution unit 100 can have different working modes, and the battery pack 1000 has high compatibility. Compared with the technical solution in the related art that the battery pack 1000 is generally only suitable for working conditions with fixed charging and discharging voltages, the distribution unit 100 provided in the present disclosure can enable the battery pack 1000 to be suitable for working conditions with different charging and discharging voltages, that is, it can be compatible with a variety of voltage platforms with different voltages, which is conducive to convenient daily use.

[0098] In this way, when the power distribution unit 100 is in the first working mode, any one of the multiple battery modules 102 can be charged or discharged separately. At this time, the battery pack 1000 can be suitable for a charging platform with a lower charging voltage, so that it can have a conventional charging mode; and when the power distribution unit 100 is in the second working mode, that is, when some or all of the multiple battery modules 102 are connected in series, the battery pack 1000 can be suitable for a charging platform with a higher charging voltage, so that it can have a fast charging mode. In other words, the battery pack 1000 provided in the present disclosure can have a charging platform suitable for different voltages, that is, it can be compatible with voltage platforms of multiple voltages, which is conducive to convenient daily use. In addition, since the multiple battery modules 102 in the battery pack 1000 can have different working modes, the number of battery modules 102 that are discharged can also be different under different working modes. Therefore, the battery pack 1000 can have different discharge modes, and different voltage power supply modes can be provided to the electric drive parts of the electrical equipment (such as the motor of the vehicle).

[0099] For example, the power distribution unit 100 can be applied to a battery pack 1000 of a vehicle. The battery pack 1000 can include two battery cell modules 102. The operating voltage of the two battery cell modules 102 is 400V. By changing the working mode of the power distribution unit 100, the battery pack 1000 can have the following working modes:

[0100] In the first working mode, the two battery modules 102 are connected in parallel or disconnected from each other through the power distribution unit 100, so that the two battery modules 102 can be relatively independent. In this way, on the one hand, the vehicle can be compatible with a 400V charging system and a variety of voltage platforms, which is convenient for daily use; on the other hand, when the vehicle is in an extreme working condition (for example, the vehicle is flooded, collided, etc.), causing one of the battery modules 102 to be damaged, the damaged battery module 102 can be cut off while the other battery modules 102 can be used normally. In this way, even if the vehicle is in an extreme working condition, the vehicle can still drive normally, thereby improving the driving safety of the passengers.

[0101] In the second working mode, two battery modules 102 are connected in series through the distribution unit 100, so that the vehicle battery pack 1000 can be charged or discharged under 800V conditions. Under 800V conditions, on the one hand, the charging power of the battery module 102 can be increased, thereby increasing the energy replenishment speed of the vehicle; on the other hand, compared with the 400V condition, the 800V condition can reduce the output current of the battery module 102 at the same output power, thereby improving the energy conversion efficiency of the battery module 102 and increasing the vehicle's cruising range.

[0102] It should be noted here that the above-mentioned 400V and 800V refer to the operating conditions of the distribution unit 100, rather than specific restrictions on voltage. As an embodiment of the present disclosure, the above-mentioned 400V refers to the operating condition in the range of 0 to 500V, and 800V refers to the operating condition in the range of 500V to 1000V.

[0103] The present disclosure does not limit the specific mode of the above-mentioned first working mode. As an embodiment of the present disclosure, the above-mentioned first working mode may include a first charging mode. In the first charging mode, the power distribution unit 100 is electrically connected to an external charging system and one of the multiple battery modules 102. In other words, when the power distribution unit 100 is in the first charging mode, the power distribution unit 100 can charge a battery module 102 in the battery pack 1000 separately.

[0104] In order to realize the above-mentioned first charging mode, a circuit 3 may be provided in the above-mentioned power distribution device, and the circuit 3 may include a first circuit 31 and a fourth circuit, the first end of the first circuit 31 is used to be connected to the positive pole of the external charging system, the second end of the first circuit 31 is used to be connected to the positive pole of the first battery module 103 among at least two battery modules 102, the first end of the fourth circuit is used to be connected to the negative pole of the external charging system, and the second end of the fourth circuit is used to be connected to the negative pole of the first battery module 103, wherein the first working mode includes a first sub-charging mode, in the first sub-charging mode, the first circuit 31, the fourth circuit, the external charging system and the first battery module 103 are connected in series.

[0105] In this way, the first battery cell module 103 in the battery pack 1000 can be connected to an external charging system through the first circuit 31 and the fourth circuit. In this way, when the first circuit 31 and the fourth circuit are turned on, the battery pack 1000 using the distribution unit 100 can have a first battery cell module 103 charging mode, and the external charging system can charge the first battery cell module 103 in the battery pack 1000.

[0106] It should be noted that the present disclosure does not limit the specific switching method between different working modes of the above-mentioned battery pack 1000. As an embodiment of the present disclosure, the above-mentioned distribution unit 100 may also include a disconnecting device 4, which is used to connect or disconnect at least one of the first circuit 31 and the fourth circuit.

[0107] In this way, by controlling the disconnecting device 4 to disconnect the first circuit 31 and / or the fourth circuit, the circuit between the external charging system and the first battery cell module 103 can also be disconnected, and the battery pack 1000 can be switched to other working modes.

[0108] Optionally, the above-mentioned circuit 3 may also include a second circuit 32 and a fifth circuit, the first end of the second circuit 32 is used to connect to the negative pole of the external charging system, the second end of the second circuit 32 is used to connect to the negative pole of the second battery cell module 104 among at least two battery cell modules 102, the first end of the fifth circuit is used to connect to the negative pole of the external charging system, and the second end of the fifth circuit is used to connect to the positive pole of the second battery cell module 104, wherein the first operating mode includes a second sub-charging mode, in the second sub-charging mode, the second circuit 32, the fifth circuit, the external charging system and the second battery cell module 104 are connected in series.

[0109] In this way, the second battery cell module 104 in the battery pack 1000 can be connected to an external charging system through the second circuit 32 and the fifth circuit. In this way, when the second circuit 32 and the fifth circuit are turned on, the battery pack 1000 using the distribution unit 100 can have a second battery cell module 104 charging mode, and the external charging system can also charge the second battery cell module 104 in the battery pack 1000.

[0110] It can be understood that the first charging mode mentioned above may include a first sub-charging mode for charging the first battery cell module 103 , and / or may also include a second sub-charging mode for charging the second battery cell module 104 .

[0111] The present disclosure does not limit the specific switching method between different working modes of the above-mentioned battery pack 1000. As an embodiment of the present disclosure, the above-mentioned distribution unit 100 may also include a disconnecting device 4, which is used to connect or disconnect at least one of the second circuit 32 and the fifth circuit.

[0112] In this way, by controlling the disconnecting device 4 to disconnect one or more of the second circuit 32 and the fifth circuit, the circuit between the external charging system and the second battery cell module 104 can be disconnected, and the battery pack 1000 can be switched to other working modes.

[0113] Here, it should be noted that the present disclosure does not limit the relationship between the charging mode of the first battery cell module 103 and the charging mode of the second battery cell module 104. For example, the charging mode of the first battery cell module 103 and the charging mode of the second battery cell module 104 can be independent of each other, and the power distribution unit 100 can charge the first battery cell module 103 in the battery pack 1000 separately through the external charging system, and the power distribution unit 100 can also charge the second battery cell module 104 in the battery pack 1000 separately through the external charging system.

[0114] As an embodiment of the present disclosure, the above-mentioned first battery cell module 103 charging mode and the second battery cell module 104 charging mode can also exist at the same time. In other words, the external charging system can charge the first battery cell module 103 and the second battery cell module 104 at the same time through the distribution unit 100, which is beneficial to improve the charging speed and charging efficiency of the battery pack 1000.

[0115] In order to facilitate the discharge of the battery pack 1000 through the above-mentioned power distribution unit 100, optionally, the above-mentioned first working mode may also include a first discharge mode, in which the power distribution unit 100 electrically connects the device body of the power-consuming device with one of the multiple battery cell modules 102. In this way, it is only necessary to adjust the power distribution unit 100 to the first discharge mode to achieve separate discharge through any one of the battery cell modules 102 in the battery pack 1000.

[0116] In order to realize the above-mentioned first discharge mode, Figure 8 As shown, the above-mentioned circuit 3 may include a sixth circuit 34 and an eighth circuit 36, the first end of the sixth circuit 34 is used to be connected to the negative pole of the device body of the electrical equipment, the second end of the sixth circuit 34 is used to be connected to the negative pole of the first battery cell module 103 among the at least two battery cell modules 102, the first end of the eighth circuit 36 ​​is used to be connected to the positive pole of the device body of the electrical equipment, and the second end of the eighth circuit 36 ​​is used to be connected to the positive pole of the first battery cell module 103, wherein the first operating mode includes a first sub-discharge mode, in the first sub-discharge mode, the sixth circuit 34, the eighth circuit 36, the first battery cell module and the device body are connected in series.

[0117] In this way, the first battery cell module 103 in the battery pack 1000 can be connected to the device body of the electrical equipment through the sixth circuit 34 and the eighth circuit 36. In this way, when the sixth circuit 34 and the eighth circuit 36 ​​are turned on, the battery pack 1000 using the distribution unit 100 can have a first battery cell module 103 discharge mode, and the first battery cell module 103 can discharge the device body of the electrical equipment.

[0118] The present disclosure does not limit the specific switching method between different working modes of the above-mentioned battery pack 1000. As an embodiment of the present disclosure, the above-mentioned distribution unit 100 may also include a disconnecting device 4, which is used to connect or disconnect at least one of the sixth circuit 34 and the eighth circuit 36.

[0119] In this way, by controlling the disconnecting device 4, the switch device disconnects the sixth circuit 34 and / or the eighth circuit 36, and can also disconnect the circuit between the first battery cell module 103 and the device body of the electrical device, switching the battery pack 1000 to other working modes.

[0120] Alternatively, if Fig. 9 As shown, the above-mentioned distribution unit 100 also includes a seventh circuit 35 and a ninth circuit 37, the first end of the seventh circuit 35 is used to be connected to the negative pole of the equipment body of the electrical equipment, the second end of the seventh circuit 35 is used to be connected to the negative pole of the second battery module 104 among at least two battery modules 102, the first end of the ninth circuit 37 is used to be connected to the positive pole of the equipment body of the electrical equipment, and the second end of the ninth circuit 37 is used to be connected to the positive pole of the second battery module 104, wherein the first operating mode includes a second sub-discharge mode, in the second sub-discharge mode, the seventh circuit 35, the ninth circuit 37, the second battery module and the equipment body are connected in series.

[0121] In this way, through the seventh circuit 35 and the ninth circuit 37, the second battery cell module 104 in the battery pack 1000 can be connected to the equipment body of the electrical equipment. In this way, when the seventh circuit 35 and the ninth circuit 37 are turned on, the battery pack 1000 using the distribution unit 100 can have a second battery cell module 104 discharge mode, and the second battery cell module 104 can discharge the equipment body of the electrical equipment.

[0122] The present disclosure does not limit the specific switching method between different working modes of the above-mentioned battery pack 1000. As an embodiment of the present disclosure, the above-mentioned distribution unit 100 may also include a disconnecting device 4, which is used to connect or disconnect at least one of the seventh circuit 35 and the ninth circuit 37.

[0123] In this way, by controlling the disconnecting device 4, the switch device disconnects the seventh circuit 35 and / or the ninth circuit 37, and the circuit between the second battery cell module 104 and the device body of the electrical device can also be disconnected, switching the battery pack 1000 to other working modes.

[0124] It is understandable that the first discharging mode mentioned above may include a first sub-charging mode for discharging the first battery cell module 103 , and / or may also include a second sub-charging mode for discharging the second battery cell module 104 .

[0125] Here, it should be noted that, in the power distribution unit 100 of the present disclosure, the power distribution unit 100 can not only connect the first cell module 103 in the battery pack 1000 and the main body of the electrical equipment separately, but also can connect the second cell module 104 in the battery pack 1000 and the main body of the electrical equipment separately. In this way, even when the vehicle is in an extreme working condition (for example, water ingress, collision, etc.), resulting in damage to one of the cell modules 102, the damaged cell module 102 is cut off while the other cell modules 102 are kept in normal use. In other words, even if the vehicle is in an extreme working condition, by switching the working mode of the power distribution unit 100, the vehicle can be driven normally, thereby improving the driving safety of the passengers.

[0126] In order to realize fast charging of the battery pack 1000, the second working mode may optionally include a second charging mode, in which the power distribution unit 100 connects the multiple battery modules 102 in the battery pack 1000 in series as a whole, and electrically connects the multiple battery modules 102 in series to an external charging system. In this way, by simply adjusting the power distribution unit 100 to the second charging mode, charging can be realized by connecting the multiple battery modules 102 in the battery pack 1000 in series, and the external charging system can charge the battery pack 1000 with a larger power, and the battery pack 1000 can be recharged at a faster speed.

[0127] For example, for a battery pack 1000 in which the power distribution unit 100 is applied to a vehicle, the battery pack 1000 includes two battery cell modules 102, and the operating condition of each battery cell module 102 is 400V. The external charging system can fast charge the two battery cell modules 102 at a voltage of 800V, with a higher charging power and a faster energy replenishment speed.

[0128] To implement the above mode, optionally, Figure 6 As shown, the above-mentioned circuit 3 may include a first circuit 31, a second circuit 32 and a third circuit 33, the first end of the first circuit 31 is used to connect to the positive electrode of the external charging system, the second end of the first circuit 31 is used to connect to the positive electrode of the first battery cell module 103 among at least two battery cell modules 102, the first end of the second circuit 32 is used to connect to the negative electrode of the external charging system, the second end of the second circuit 32 is used to connect to the negative electrode of the second battery cell module 104 among at least two battery cell modules 102, the first end of the third circuit 33 is used to connect to the negative electrode of the first battery cell module 103, and the second end of the third circuit 33 is used to connect to the positive electrode of the second battery cell module 104, wherein the second operating mode includes a second charging mode, in which the first circuit 31, the second circuit 32, the third circuit 33, the external charging system, the first battery cell module 103 and the second battery cell module 104 are connected in series.

[0129] In this way, through the first circuit 31, the second circuit 32 and the third circuit 33, the first battery cell module 103 and the second battery cell module 104 in the battery pack 1000 can be connected in series as a whole, and the first battery cell module 103 and the second battery cell module 104 in the battery pack 1000 can be connected to an external charging system. In this way, when the first circuit 31, the second circuit 32 and the third circuit 33 are turned on, the battery pack 1000 using the distribution unit 100 can have a high-voltage charging mode, the external charging system can charge the battery pack 1000 with a larger power, and the battery pack 1000 can be recharged faster.

[0130] It should be noted that the present disclosure does not limit the specific switching method between different working modes of the above-mentioned battery pack 1000. As an embodiment of the present disclosure, the above-mentioned distribution unit 100 may also include a disconnecting device 4, which is used to connect or disconnect at least one of the first circuit 31, the second circuit 32 and the third circuit 33.

[0131] In this way, by controlling the disconnecting device 4, the switching device can disconnect one or more of the first circuit 31, the second circuit 32 and the third circuit 33, and can also disconnect the circuit between the external charging system and the battery cell module 102, switching the battery pack 1000 to other working modes.

[0132] In order to achieve high power output of the battery pack 1000, optionally, the second working mode also includes a second discharge mode. In the second discharge mode, the power distribution unit 100 connects the multiple battery modules 102 in the battery pack 1000 in series as a whole, and electrically connects the multiple battery modules 102 in series to the main body of the electrical equipment. In this way, the power distribution unit 100 only needs to be adjusted to the second discharge mode to achieve discharge through the multiple battery modules 102 in the battery pack 1000 connected in series, and the battery pack 1000 can supply power to the main body of the electrical equipment with a larger power, and the main body of the equipment can drive a larger load.

[0133] For example, for a battery pack 1000 in which the power distribution unit 100 is applied to a vehicle, the battery pack 1000 includes two battery cell modules 102, and the operating condition of each battery cell module 102 is 400V. In an implementation mode, the battery pack 1000 can output current to the vehicle's drive motor at 800V. The drive motor has a large power, which can enable the vehicle to have higher performance.

[0134] In addition, compared with the 400V operating condition, the 800V operating condition can reduce the output current of the battery module 102 at the same output power, thereby improving the energy conversion efficiency of the battery module 102 and increasing the vehicle's cruising range.

[0135] In order to realize the second discharge mode, Figure 7 As shown, the above-mentioned circuit 3 can also include a third circuit 33, a sixth circuit 34 and a seventh circuit 35, the first end of the third circuit 33 is used to connect to the negative pole of the first battery cell module 103 among the at least two battery cell modules 102, the second end of the third circuit 33 is used to connect to the positive pole of the second battery cell module 104 among the at least two battery cell modules 102, the first end of the sixth circuit 34 is used to connect to the negative pole of the equipment body of the electrical equipment, the second end of the seventh circuit 35 is used to connect to the positive pole of the first battery cell module 103, the first end of the seventh circuit 35 is used to connect to the positive pole of the equipment body of the electrical equipment, and the second end of the seventh circuit 35 is used to connect to the negative pole of the second battery cell module 104, wherein in the second discharge mode, the third circuit 33, the sixth circuit 34, the seventh circuit 35, the first battery cell module 103, the second battery cell module 104 and the equipment body are connected in series.

[0136] In this way, through the third circuit 33, the sixth circuit 34 and the seventh circuit 35, the first battery cell module 103 and the second battery cell module 104 in the battery pack 1000 can be connected in series as a whole, and the first battery cell module 103 and the second battery cell module 104 in the battery pack 1000 can be connected to the device body of the electrical equipment. In this way, when the above-mentioned third circuit 33, the sixth circuit 34 and the seventh circuit 35 are turned on, the battery pack 1000 using the distribution unit 100 can have a high-voltage discharge mode, and the battery pack 1000 can supply power to the device body of the electrical equipment with a larger power, and the device body can drive a larger load.

[0137] It should be noted that the present disclosure does not limit the specific switching method between different working modes of the above-mentioned battery pack 1000. As an embodiment of the present disclosure, the above-mentioned distribution unit 100 may also include a disconnecting device 4, which is used to connect or disconnect at least one of the third circuit 33, the sixth circuit 34 and the seventh circuit 35.

[0138] In this way, by controlling the disconnecting device 4, the switching device can disconnect one or more of the third circuit 33, the sixth circuit 34 and the seventh circuit 35, and can also disconnect the circuit between the external charging system and the first battery cell module 103 and / or the second battery cell module 104, and switch the battery pack 1000 to other working modes.

[0139] In order to realize the mutual switching among the above-mentioned multiple working modes, optionally, as Figures 4 to 13 As shown, the above-mentioned power distribution unit 100 may also include a disconnecting device 4, which is used to connect or disconnect the circuit 3 between the battery pack 1000, the external charging system, and the device body of the power-consuming device, so that the power distribution unit 100 can switch between the first working mode and the second working mode. In this way, by adjusting the working state of the disconnecting device 4, the switching of different working modes of the power distribution unit 100 can be achieved, thereby switching the working mode of the battery pack 1000, and the switching between working modes is relatively simple.

[0140] As another embodiment of the present disclosure, the power distribution unit 100 may further include a power switching chip, which is used to connect or disconnect the circuit 3 between the battery pack 1000, the external charging system, and the device body of the power-consuming device, so that the power distribution unit 100 can switch between the first working mode and the second working mode. In this way, by adjusting and controlling the power switching chip, the switching of different working modes of the power distribution unit 100 can also be achieved, thereby switching the working mode of the battery pack 1000.

[0141] Here, it should be noted that the present disclosure does not limit the specific type of the above-mentioned disconnecting device 4. As an embodiment of the present disclosure, as shown in the figure, the above-mentioned disconnecting device 4 may include multiple relays 41, and the multiple relays 41 are arranged on the corresponding circuit 3 between the battery pack 1000, the external charging system, and the device body of the electrical equipment. Each relay 41 is used to control the connection or disconnection of the corresponding circuit 3. In this way, by controlling the working state of the multiple relays 41, the circuit 3 between the battery cell module 102 of the battery pack 1000 and the external charging system can be turned on or off, or the circuit 3 between the battery cell module 102 of the battery pack 1000 and the device body of the electrical equipment can be turned on or off, so that different working modes such as charging or discharging of the battery pack 1000 can be realized.

[0142] Here, it should be noted that the breaking device 4 of the present disclosure is not limited to the above-mentioned relay 41, and the breaking device 4 can be of any appropriate type. As another embodiment of the present disclosure, Figure 5 As shown, the above-mentioned disconnecting device 4 also includes a composite switch 43, which is used to control the connection or disconnection of multiple circuits 3 between the battery pack 1000, the external charging system, and the device body of the electrical device.

[0143] In the compound switch 43, since the compound switch 43 has multiple switch modules, by setting the multiple switch modules in the compound switch 43 on the corresponding circuit 3 between the battery pack 1000, the external charging system, and the device body of the electrical equipment, by controlling the working state of the compound switch 43, the circuit 3 between the battery cell module 102 of the battery pack 1000 and the external charging system can be turned on or off, or the circuit 3 between the battery cell module 102 of the battery pack 1000 and the device body of the electrical equipment can be turned on or off, thereby realizing different working modes such as charging or discharging of the battery pack 1000.

[0144] The present disclosure does not limit the specific type of the above-mentioned composite switch 43, as long as it can control the conduction or disconnection of multiple circuits. As an embodiment of the present disclosure, the above-mentioned composite switch can be a DPDT switch, that is, a double-pole double-throw switch. The DPDT switch can control the conduction or disconnection of two circuits.

[0145] In order to facilitate monitoring of the operating status of the power distribution unit 100, optionally, as Figures 4 to 13As shown, the power distribution unit body 2 also includes at least one of a collection device 5 and a circuit protection device 6, wherein the circuit protection device 6 is used to disconnect the circuit 3 between the battery pack 1000, the external charging system, and the main body of the power-consuming device when a fault occurs in the battery pack 1000, and the collection device 5 is used to collect information on the current and / or voltage in the battery pack 1000. In this way, by reasonably designing the components in the power distribution unit body 2, the safety of the power distribution unit 100 can be improved while meeting the normal use requirements of the power distribution unit 100. The highly safe power distribution unit 100 can enhance the safety of the use of the battery pack 1000, thereby improving the safety of the entire power-consuming device.

[0146] The present disclosure does not limit the specific type of the circuit protection device 6, and the circuit protection device 6 can be any protection device suitable for being arranged in the circuit 3. As an embodiment of the present disclosure, Figures 4 to 13 As shown, the circuit protection device 6 may include an active fuse 61 and / or an active passive fuse 62. The active fuse 61 and / or the active passive fuse 62 can disconnect the corresponding circuit 3 when an abnormality (such as abnormal current or abnormal voltage) occurs in the circuit 3, thereby preventing the circuit 3 from being damaged due to overload.

[0147] In addition, it can be understood that for the implementation method in which the active fuse 61 and the active passive fuse 62 are simultaneously provided in the distribution unit 100, the active fuse 61 and the active passive fuse 62 can back up each other. In this way, even if one of the active fuse 61 and the active passive fuse 62 fails during use, the other of the active fuse 61 and the active passive fuse 62 can also normally protect the circuit 3. The redundancy of the distribution unit 100 is relatively high, which is conducive to improving the safety of the distribution unit 100.

[0148] As other embodiments of the present disclosure, the circuit protection device 6 may further include a thermal fuse, etc., which is not limited in the present disclosure.

[0149] It should be noted that the present disclosure does not limit the specific type of the acquisition device 5, as long as the acquisition device 5 is suitable for being set in the circuit 3 and can collect the current and / or voltage of the circuit 3. As an embodiment of the present disclosure, the above-mentioned acquisition device 5 may include a current sensor 51, which is used to monitor the current of the relevant circuit 3 in the battery pack 1000, and / or the acquisition device 5 includes a voltage sensor 52, which is used to monitor the voltage of the relevant circuit 3 in the battery pack 1000. By arranging the current sensor 51 and / or the voltage sensor 52 in the distribution unit 100, the current and / or voltage of the circuit 3 in the distribution unit 100 can be monitored, so that when the current and / or voltage in the circuit 3 are abnormal, the protection mechanism (such as the active fuse 61 or the active and passive fuse 62 mentioned below) can be triggered to disconnect the circuit 3, which is conducive to improving the safety of the distribution unit 100, thereby improving the safety of the battery pack 1000 using the distribution unit 100.

[0150] In order to perform heat exchange on the power distribution unit 100, optionally, as Figures 1 to 3 As shown, at least part of the housing 1 is constructed as a heat exchange plate 7, or the power distribution unit 100 includes a heat exchange plate 7 disposed on the housing 1, and the power distribution unit body 2 exchanges heat with the heat exchange structure (such as a liquid cooling plate) of the box 101 of the battery pack 1000 through the heat exchange plate 7. In other words, the power distribution unit 100 is also provided with a heat exchange plate 7 for heat exchange, and the heat exchange plate 7 can take away the heat generated by the power distribution unit 100, so that the power distribution unit 100 can operate within a reasonable temperature range, and the power distribution unit 100 has higher safety and longer service life.

[0151] In addition, the independent heat exchange plate 7 can also ensure the heat dissipation effect of the distribution unit 100, effectively avoiding the situation where the distribution unit 100 is directly set on the heat exchange structure of the battery pack 1000, and the heat dissipation effect of the distribution unit 100 is poor, resulting in the temperature of the distribution unit 100 being too high, causing the components in the distribution unit 100 to be unable to be used normally or even damaged.

[0152] Alternatively, if Figures 4 to 13 As shown, the above-mentioned power distribution unit 100 may also include a disconnecting device 4, which is used to connect or disconnect the circuit 3 between the battery pack 1000, the external charging system, and the device body of the power-consuming device, so that the power distribution unit 100 can switch between the first working mode and the second working mode. The disconnecting device 4 includes a relay 41, and the contact 42 of the relay 41 is in contact with the heat exchange plate 7. Since the contact 42 on the relay 41 that generates more heat is directly in contact with the heat exchange plate 7, the high temperature generated by the contact 42 of the relay 41 can be directly taken away by the heat exchange plate 7, which is conducive to improving the heat exchange effect of the power distribution unit 100.

[0153] In addition, by reasonably designing the installation position of the relay 41 on the housing 1, for example, inverting the relay 41 and partially embedding the contacts 42 of the relay 41 in the housing 1, the occupied height of the contacts 42 of the relay 41 in the housing 1 can be reduced, which is conducive to further improving the compactness of the distribution unit 100.

[0154] In the present disclosure, the power distribution unit 100 may have any appropriate structure, and the power distribution unit 100 may be a single layer or a multi-layer structure, as long as the power distribution unit 100 is convenient to be arranged in the battery pack 1000. As an embodiment of the present disclosure, Figures 1 to 3 As shown, in the height direction of the battery pack 1000, the shell 1 includes a first shell 11 and a second shell 12 arranged in a stacked manner, and the distribution unit body 2 includes a first part located in the first shell 11 and a second part located in the second shell 12, wherein a first electrical connector 13 is provided on the first shell 11, and a second electrical connector 14 is provided on the second shell 12, and the first electrical connector 13 and the second electrical connector 14 are used to electrically connect the first part and the second part.

[0155] Since the shell 1 includes a first shell 11 and a second shell 12 arranged in a stacked manner, the components in the distribution unit body 2 are respectively located on the first shell 11 and the second shell 12. In this way, by reasonably arranging the installation positions of the components in the distribution unit body 2 in the shell 1, the various components in the distribution unit body 2 can be staggered in the height direction while meeting the use requirements, so that more components can be arranged in a limited area, which is conducive to improving the space utilization of the distribution unit 100, thereby reducing the volume of the distribution unit 100 and facilitating the arrangement of the distribution unit 100 in the battery pack 1000.

[0156] Alternatively, if Figures 4 to 13 As shown, the relay 41 is arranged on the first housing 11, and the heat exchange plate 7 is arranged on the side of the first housing 11 away from the second housing 12. In other words, the heat exchange plate 7 is arranged close to components with higher heat generation (such as the relay 41 mentioned above), which is conducive to improving the heat exchange effect of the heat exchange plate 7, thereby improving the heat exchange effect of the entire power distribution unit 100.

[0157] The present disclosure does not limit the specific types of the first electrical connector 13 and the second electrical connector 14. As an embodiment of the present disclosure, one of the first electrical connector 13 and the second electrical connector 14 includes a copper column 15, and the other of the first electrical connector 13 and the second electrical connector 14 includes a conductive insert 16 that cooperates with the copper column 15, and the conductive insert 16 is embedded in a groove on the corresponding housing 1. The copper column 15 and the conductive insert 16 are connected to each other, and can realize the electrical connection between the components arranged on the first housing 11 and the components arranged on the second housing 12, thereby meeting the normal use of the power distribution unit 100.

[0158] In addition, since the conductive insert 16 is embedded in the groove on the corresponding shell 1, when the first shell 11 and the second shell 12 are connected, the copper column 15 and the conductive insert 16 will not protrude from the first shell 11 and the second shell 12, and the copper column 15 and the conductive insert 16 will not cause the volume of the distribution unit 100 to increase. The structure of the distribution unit 100 is relatively compact and the space utilization rate is high.

[0159] In order to facilitate connecting the power distribution unit 100 with the battery cell module 102 in the battery pack 1000, the external charging system and the device body of the power-consuming device, optionally, as Figures 1 to 5 As shown, the above-mentioned distribution unit 100 may also include a battery cell module connector 8, a charging end connector 9 and a discharging end connector 10, the battery cell module connector 8 is used to be electrically connected to the battery cell module 102, the charging end connector 9 is used to be electrically connected to an external charging system, and the discharging end connector 10 is used to be electrically connected to the device body of the electrical device, and at least one of the battery cell module connector 8, the charging end connector 9 and the discharging end connector 10 is set as a quick-plug connector.

[0160] Through the quick-plug connector, the distribution unit 100 can be quickly connected with the battery cell module 102 in the battery pack 1000, the external charging system and the main body of the electrical equipment, which is helpful to simplify the connection steps between the distribution unit 100 and the battery cell module 102 in the battery pack 1000, the external charging system and the main body of the electrical equipment, and improve the connection efficiency.

[0161] In order to improve the safety of the power distribution unit, the power distribution unit may further include an insulating member, which is arranged at the electrical connection of the power distribution unit. Thus, by arranging the insulating member at the connection of the power distribution unit, it is possible to prevent the operator from accidentally touching the connection and causing injury when connecting the power distribution unit to other components.

[0162] According to the second aspect of the present disclosure, Fig.16As shown, a battery pack 1000 is provided, including a cell module 102, a housing 101 and the power distribution unit 100 as described above, the cell module 102 and the housing 1 are both arranged inside the housing 101 of the battery pack 1000, and the battery pack 1000 is used to be electrically connected to an external charging system or a device body of an electrical device.

[0163] Through the above-mentioned power distribution unit 100, the battery cell module 102 in the battery pack 1000 can be connected to an external charging system, and the battery cell module 102 can be electrically connected to the device body of the electrical equipment, so that the battery cell module 102 in the battery pack 1000 can be discharged to the outside and charged.

[0164] The battery pack 1000 has all the beneficial effects of the above-mentioned power distribution unit 100, which will not be described in detail here.

[0165] Here, it should be noted that in the present disclosure, the present disclosure does not limit the number of battery cell modules 102 in the battery pack 1000. The battery cell modules 102 in the battery pack 1000 can be one or more, as long as the battery pack 1000 can meet the power demand of the power-consuming device. As an embodiment of the present disclosure, Fig.16 As shown, the power distribution unit 100 is electrically connected to at least two battery modules 102, and is configured to realize the series connection or parallel connection of at least two battery modules 102. In other words, the power distribution unit 100 is connected to multiple battery modules 102 at the same time, and the power distribution unit 100 can realize the electrical connection between multiple battery modules 102 in the battery pack 1000 and the external charging system and the device body of the power-consuming device, thereby realizing the charging and discharging of multiple battery modules 102.

[0166] In addition, since the distribution unit 100 is configured to achieve series or parallel connection of at least two battery cell modules 102, by changing the working mode of the distribution unit 100, the battery pack 1000 can have a variety of different working modes and can be adapted to charging platforms with different charging voltages.

[0167] Here, it should be noted that in the present disclosure, the present disclosure does not limit the number of battery cell modules 102 in the battery pack 1000. The battery cell modules 102 in the battery pack 1000 can be one or more, as long as the battery pack 1000 can meet the power demand of the electrical equipment. As an embodiment of the present disclosure, the number of the above-mentioned battery cell modules 102 is multiple, and the operating voltage of each battery cell module 102 is 400V. In this way, by operating the power distribution unit 100, the battery pack 1000 can have different operating voltages, so that it can be compatible with working conditions with different charging and discharging voltages.

[0168] According to a third aspect of the present disclosure, there is provided an electric device, comprising a device body and the battery pack 1000 as described above, wherein the battery pack 1000 is installed in the device body and is used to supply power to the device body.

[0169] The electrical equipment has all the beneficial effects of the above-mentioned battery pack 1000, which will not be described in detail here.

[0170] Here, it should be noted that the present disclosure does not limit the specific types of electrical equipment, and the above-mentioned electrical equipment can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys and electric tools, etc. Vehicles can be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc.; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, which are not limited in the present disclosure.

[0171] As an embodiment of the present disclosure, the above-mentioned electrical equipment is a vehicle, and the body structure of the vehicle is a part of the box 101 of the battery pack 1000. In other words, the battery pack 1000 is integrated into the body of the vehicle. In this way, on the one hand, the integrated design of the battery pack 1000 and the body can improve the torsional strength of the whole vehicle, making the vehicle more stable during driving, improving the handling, and also enhancing safety; on the other hand, the integrated design of the battery pack 1000 can also reduce part of the box 101 of the battery pack 1000, so that it can reduce the cost increase caused by the use of this part of the shell 1, and can also reduce the increase in the thickness of the vehicle chassis caused by the use of this part of the shell 1, which is conducive to improving the compactness of the vehicle.

[0172] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0173] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0174] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A power distribution unit, characterized in that: It comprises a shell and a power distribution unit body arranged in the shell, wherein the shell is suitable for being arranged inside a box of a battery pack; The power distribution unit has a first working mode and a second working mode. In the first working mode, the power distribution unit is electrically connected to one of the multiple battery cell modules of the battery pack to realize charging or discharging of the single battery cell module; In the second working mode, the power distribution unit connects multiple battery cell modules in the battery pack in series as a whole for charging or discharging.

2. The power distribution unit according to claim 1, characterized in that: The first working mode includes a first charging mode, in which the power distribution unit electrically connects an external charging system to one of the plurality of battery modules; or, The first operation mode includes a first discharge mode. In the first discharge mode, the power distribution unit electrically connects a device body of an electric device and one of the plurality of battery cell modules.

3. The power distribution unit according to claim 1, characterized in that: The second working mode includes a second charging mode, in which the power distribution unit connects the multiple battery modules in the battery pack in series as a whole, and electrically connects the multiple battery modules connected in series to an external charging system; or The second working mode includes a second discharge mode. In the second discharge mode, the power distribution unit connects the multiple battery modules in the battery pack in series as a whole, and electrically connects the multiple battery modules connected in series to the device body of the electrical device.

4. The power distribution unit according to claim 1, characterized in that: The power distribution unit further includes a first circuit, a second circuit and a third circuit; The first end of the first circuit is used to be connected to the positive electrode of the external charging system, and the second end of the first circuit is used to be connected to the positive electrode of the first battery cell module among the multiple battery cell modules; The first end of the second circuit is used to be connected to the negative electrode of the external charging system, and the second end of the second circuit is used to be connected to the negative electrode of the second battery cell module among the multiple battery cell modules; The first end of the third circuit is used to be connected to the negative electrode of the first battery cell module, and the second end of the third circuit is used to be connected to the positive electrode of the second battery cell module; The second working mode includes a second charging mode. In the second charging mode, the first circuit, the second circuit, the third circuit, the external charging system, the first battery cell module and the second battery cell module are connected in series.

5. The power distribution unit according to claim 1, characterized in that: The power distribution unit also includes a first circuit and a fourth circuit; The first end of the first circuit is used to be connected to the positive electrode of the external charging system, and the second end of the first circuit is used to be connected to the positive electrode of the first battery cell module among the multiple battery cell modules; The first end of the fourth circuit is used to be connected to the negative electrode of the external charging system, and the second end of the fourth circuit is used to be connected to the negative electrode of the first battery module; The first working mode includes a first sub-charging mode. In the first sub-charging mode, the first circuit, the fourth circuit, the external charging system and the first battery cell module are connected in series.

6. The power distribution unit according to claim 1, characterized in that: The power distribution unit also includes a second circuit and a fifth circuit; The first end of the second circuit is used to be connected to the negative electrode of the external charging system, and the second end of the second circuit is used to be connected to the negative electrode of the second battery cell module among the multiple battery cell modules; The first end of the fifth circuit is used to be connected to the negative electrode of the external charging system, and the second end of the fifth circuit is used to be connected to the positive electrode of the second battery module; The first working mode includes a second sub-charging mode. In the second sub-charging mode, the second circuit, the fifth circuit, the external charging system and the second battery cell module are connected in series.

7. The power distribution unit according to claim 1, characterized in that: The power distribution unit further includes a third circuit, a sixth circuit and a seventh circuit; The first end of the third circuit is used to be connected to the negative electrode of the first battery cell module among the multiple battery cell modules, and the second end of the third circuit is used to be connected to the positive electrode of the second battery cell module among the multiple battery cell modules; The first end of the sixth circuit is used to be connected to the positive electrode of the device body of the electric device, and the second end of the sixth circuit is used to be connected to the positive electrode of the first battery module; The first end of the seventh circuit is used to be connected to the negative electrode of the device body of the electric device, and the second end of the seventh circuit is used to be connected to the negative electrode of the second battery module; The second working mode includes a second discharge mode. In the second discharge mode, the third circuit, the sixth circuit, the seventh circuit, the first battery cell module, the second battery cell module and the device body are connected in series.

8. The power distribution unit according to claim 1, characterized in that: The power distribution unit also includes a sixth circuit and an eighth circuit; The first end of the sixth circuit is used to be connected to the positive electrode of the device body of the electric device, and the second end of the sixth circuit is used to be connected to the positive electrode of the first battery cell module among the at least two battery cell modules; The first end of the eighth circuit is used to be connected to the negative electrode of the device body of the electrical device, and the second end of the eighth circuit is used to be connected to the negative electrode of the first battery module; The first working mode includes a first sub-discharging mode. In the first sub-discharging mode, the sixth circuit, the eighth circuit, the first battery cell module and the device body are connected in series.

9. The power distribution unit according to claim 1, characterized in that: The power distribution unit also includes a seventh circuit and a ninth circuit; The first end of the seventh circuit is used to be connected to the negative electrode of the device body of the electric device, and the second end of the seventh circuit is used to be connected to the negative electrode of the second battery cell module among the two battery cell modules; The first end of the ninth circuit is used to be connected to the positive electrode of the device body of the electric device, and the second end of the ninth circuit is used to be connected to the positive electrode of the second battery module; The first operating mode includes a second sub-discharging mode. In the second sub-discharging mode, the seventh circuit, the ninth circuit, the second battery cell module and the device body are connected in series.

10. The power distribution unit according to any one of claims 1 to 9, characterized in that: The power distribution unit includes a disconnecting device; The disconnecting device is used to connect or disconnect the circuit between the battery pack, the external charging system, and the device body of the electrical equipment, so that the power distribution unit can switch between the first working mode and the second working mode.

11. The power distribution unit according to claim 10, characterized in that: The disconnecting device includes a plurality of relays, and the plurality of relays are arranged on corresponding circuits between the battery pack, the external charging system, and the device body; Each of the relays is used to control the connection or disconnection of a corresponding circuit.

12. The power distribution unit according to claim 11, characterized in that: The disconnecting device includes a composite switch, and the composite switch is used to control the connection or disconnection of multiple circuits between the battery pack, the external charging system, and the device body.

13. The power distribution unit according to any one of claims 1 to 9, characterized in that: The power distribution unit body further includes at least one of a collection device and a circuit protection device; Wherein, the circuit protection device is used to disconnect the circuit between the battery pack, the external charging system, and the device body of the power-consuming device when the battery pack fails; The acquisition device is used to acquire information of current and / or voltage in the battery pack.

14. The power distribution unit according to any one of claims 1 to 9, characterized in that: At least part of the housing is configured as a heat exchange plate, or the power distribution unit comprises a heat exchange plate disposed on the housing; The power distribution unit body exchanges heat with the heat exchange structure of the battery pack through the heat exchange plate.

15. The power distribution unit according to claim 14, characterized in that: The power distribution unit includes a disconnecting device; The disconnecting device is used to connect or disconnect the circuit between the battery pack, the external charging system, and the device body of the power-consuming device, so that the power distribution unit can switch between the first working mode and the second working mode; The disconnecting device comprises a relay, and a contact of the relay is in contact with the heat exchange plate.

16. The power distribution unit according to any one of claims 1 to 9, characterized in that: In the height direction of the battery pack, the housing includes a first housing and a second housing that are stacked; The power distribution unit body includes a first portion located in the first housing and a second portion located in the second housing; The first shell is provided with a first electrical connector, the second shell is provided with a second electrical connector, and the first electrical connector and the second electrical connector are used to electrically connect the first part and the second part.

17. A battery pack, characterized in that: Comprising a battery cell module, a box body and a power distribution unit according to any one of claims 1-16; The battery cell module and the shell are both arranged inside the box; The battery pack is used to be electrically connected to an external charging system or a device body of an electric device.

18. The battery pack according to claim 17, characterized in that: There are multiple battery cell modules, and the operating voltage of each battery cell module is 400V.

19. An electrical equipment, characterized in that: It comprises a device body and a battery pack according to claim 17 or 18, wherein the battery pack is installed on the device body and is used to supply power to the device body.

20. The electrical equipment according to claim 19, characterized in that: The electrical equipment is a vehicle, and a body structure of the vehicle is a part of the box body of the battery pack.

Images