Vehicle power battery pack device and control system thereof

Abstract

The invention discloses a vehicle power battery pack device and a control system thereof, and relates to the technical field of batteries, a total battery pack is composed of small battery packs, the small battery packs are composed of battery modules, and cylindrical battery cells are arranged in the battery modules; the battery module comprises a battery box, a porous baffle plate and a battery connecting piece; a battery cell accommodating cavity is formed in the battery box, supporting ribs are formed in the battery cell accommodating cavity, flow guide channels are formed among the supporting ribs, the tail ends of the flow guide channels surround to form battery cell mounting positions, and the cylindrical battery cells are embedded in the battery cell mounting positions; the cathodes of the cylindrical battery cells are connected based on one battery connecting piece, and the anodes are connected based on the other battery connecting piece; a first through hole and a second through hole are formed in the porous baffle, the battery connecting piece is exposed out of the first through hole, and the second through hole is communicated with the flow guide channel; the total battery pack is communicated with the flow guide channel along the series connection direction of the small battery packs. The battery box with the flow guide channel is used for accommodating the cylindrical battery cell, so that air flow is facilitated, and heat dissipation of the cylindrical battery cell is facilitated.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a vehicle power battery pack device and a control system thereof. Background Art

[0002] Automotive power battery packs are core energy storage devices that provide power for electric vehicles (such as electric cars, electric bicycles, electric motorcycles, etc.). They are usually composed of multiple battery modules, and the battery modules integrate cylindrical cells to achieve voltage and capacity requirements.

[0003] Currently, in the design of existing automotive power battery packs, cylindrical cells are usually arranged in a dense stacking manner, which makes the gaps between the cylindrical cells very narrow, resulting in restricted air flow and affecting the heat dissipation of the cylindrical cells. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art. The present invention provides a vehicle power battery pack device and a control system thereof. The vehicle power battery pack device uses a battery box with a guide channel to accommodate cylindrical battery cells, which facilitates air flow and is beneficial to heat dissipation of the cylindrical battery cells.

[0005] The present invention provides a vehicle power battery pack device, comprising a battery pack and a battery control module, wherein the battery control module is electrically connected to the battery pack; the battery pack is composed of a plurality of battery packs connected in series, each of which is composed of a plurality of battery modules connected in parallel, and each of which is provided with a plurality of cylindrical cells connected in parallel;

[0006] Any of the battery modules comprises a battery box with openings at both ends, a porous baffle fixed at the openings at both ends of the battery box, and a battery connector embedded in the porous baffle;

[0007] The battery box is divided into a plurality of battery cell accommodating cavities, and a plurality of support ribs are protruding from any of the battery cell accommodating cavities. A flow guide channel is formed between the bodies of the plurality of support ribs. The ends of the plurality of support ribs are distributed around the geometric center circumference of the corresponding battery cell accommodating cavity to form battery cell installation positions. The plurality of cylindrical battery cells are embedded one by one in the battery cell installation positions of the corresponding battery cell accommodating cavity.

[0008] The negative electrodes of the plurality of cylindrical battery cells are connected based on one of the battery connectors, and the positive electrodes of the plurality of cylindrical battery cells are connected based on another of the battery connectors;

[0009] The porous baffle is provided with a plurality of first through holes and a plurality of second through holes, wherein the plurality of first through holes expose the battery connectors, and the plurality of second through holes are connected to the diversion channel;

[0010] The battery pack is connected to the flow guide channel along the direction in which the battery packs are connected in series.

[0011] Specifically, the battery box is a square structural shell, which is composed of a first square tube column shell and a second square tube column shell that are symmetrically arranged. The first square tube column shell and the second square tube column shell are fixedly connected based on a first assembly ear; the square structural shell and the porous baffle are fixedly connected based on a second assembly ear.

[0012] Specifically, any of the battery connectors includes a plurality of battery connectors, which are connected in series based on battery connector lines, and battery fuses are provided on the battery connector lines between adjacent battery connectors. Any of the battery connectors contacts the electrode end of the corresponding cylindrical battery cell, and the plurality of battery connectors are correspondingly embedded in the plurality of first through holes.

[0013] Specifically, a wiring groove is provided on a side of the porous baffle plate that contacts the battery box, and an end opening of the wiring groove is exposed at a side edge of the porous baffle plate.

[0014] Specifically, the battery box is a box body made of an insulating flame-retardant material, and the porous baffle is a baffle made of an insulating flame-retardant material.

[0015] Specifically, a positive bus is led out from the positive terminal of the battery pack, a main fuse and an intelligent relay are arranged in series on the positive bus, and the intelligent relay is electrically connected to the battery control module;

[0016] A temperature monitoring sensor is provided in any of the battery modules, and the temperature monitoring sensor is electrically connected to the battery control module;

[0017] Any of the battery packs is provided with a current monitoring circuit and a voltage monitoring circuit, and both the current monitoring circuit and the voltage monitoring circuit are electrically connected to the battery control module.

[0018] Specifically, the vehicle power battery pack device further includes a fan module and a temperature control module, and the fan module and the temperature control module are both electrically connected to the battery control module;

[0019] The fan module is used to provide a flow of air to the guide channel of the battery pack, and the temperature control module is used to heat or cool the flow of air.

[0020] Specifically, the vehicle power battery pack device also includes a charging circuit actuator and a discharging circuit actuator. The charging circuit actuator is electrically connected to the battery control module and the battery pack, and the discharging circuit actuator is electrically connected to the battery control module and the battery pack.

[0021] Specifically, the vehicle power battery pack device further includes a pre-charging circuit relay, which is electrically connected to the battery control module and the battery pack.

[0022] The present invention also provides a control system for a vehicle power battery pack device, wherein the control system runs in a battery control module and is used to control the battery pack.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] In the automotive power battery pack device of the present invention, a battery box of the battery module is divided into a plurality of cell accommodating cavities, a plurality of support ribs are protruding from the cell accommodating cavities, and a guide channel is formed between the bodies of the support ribs. The second through holes of the porous baffles at the openings at both ends of the battery box are connected to the guide channel, so that air can flow in the guide channel; the ends of the support ribs surround to form a cell mounting position, and the cylindrical cell is embedded in the cell mounting position, that is, each cylindrical cell is surrounded by a guide channel, which facilitates air flow along the surface of the cylindrical cell, thereby facilitating heat dissipation of the cylindrical cell;

[0025] Moreover, the battery pack is connected to the guide channel along the direction of series connection of the battery packs, which can form a coherent heat dissipation channel, avoid heat accumulation in the battery pack, and is also beneficial to the heat dissipation of the cylindrical battery cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 2 is a schematic diagram of the three-dimensional structure of a vehicle power battery pack device according to an embodiment of the present invention;

[0028] Figure 2 1 is a schematic diagram of the three-dimensional structure of a battery pack according to an embodiment of the present invention;

[0029] Figure 3 1 is a schematic diagram of the three-dimensional structure of a battery module in an embodiment of the present invention;

[0030] Figure 4 1 is a schematic diagram of a first exploded structure of a battery module according to an embodiment of the present invention;

[0031] Figure 5 2 is a schematic diagram of a second exploded structure of a battery module according to an embodiment of the present invention;

[0032] Figure 6is a schematic diagram of the three-dimensional structure of a battery connector in an embodiment of the present invention;

[0033] Figure 7 Schematic diagram of the inner surface structure of the porous baffle in an embodiment of the present invention;

[0034] Figure 8 Schematic diagram of the circuit structure of a battery pack in an embodiment of the present invention;

[0035] Figure 9 Schematic diagram of the operation of the control system in an embodiment of the present invention.

[0036] In the accompanying drawings, 1. battery pack; 2. battery control module; 10. battery pack; 20. positive bus; 21. main fuse; 22. intelligent relay; 100. battery module; 110. battery box; 111. first square tube column shell; 112. second square tube column shell; 113. first assembly ear; 114. second assembly ear; 120. porous baffle; 121. first through hole; 122. second through hole; 123. wiring groove; 130. battery connector; 131. battery connector; 132. battery connecting wire; 133. battery fuse; 141. support rib; 142. diversion channel; 143. battery cell installation position; 150. cylindrical battery cell; 160. temperature monitoring sensor; 170. current monitoring circuit; 180. voltage monitoring circuit. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0038] The present invention provides a vehicle power battery pack device, Figure 1 The figure shows a schematic diagram of the three-dimensional structure of a vehicle power battery pack device according to an embodiment of the present invention. The vehicle power battery pack device includes a battery pack 1 and a battery control module 2. The battery control module 2 is electrically connected to the battery pack 1. Figure 2 shows a schematic diagram of the three-dimensional structure of a battery pack in an embodiment of the present invention, Figure 3 The figure shows a schematic diagram of the three-dimensional structure of a battery module in an embodiment of the present invention. The battery pack 1 is composed of a plurality of battery packs 10 connected in series. Each of the battery packs 10 is composed of a plurality of battery modules 100 connected in parallel. Each of the battery modules 100 is provided with a plurality of cylindrical battery cells 150 connected in parallel.

[0039] Figure 4shows a first exploded structural diagram of a battery module according to an embodiment of the present invention, Figure 5 FIG2 shows a second exploded structural diagram of a battery module according to an embodiment of the present invention. The battery module 100 includes a battery box 110 with openings at both ends, a porous baffle 120 fixed to the openings at both ends of the battery box 110, and a battery connector 130 embedded in the porous baffle 120.

[0040] The battery case 110 is divided into a plurality of cell accommodating cavities. A plurality of support ribs 141 are protrudingly formed in any of the cell accommodating cavities. A flow guide channel 142 is formed between the bodies of the plurality of support ribs 141. The ends of the plurality of support ribs 141 are distributed around the geometric center circumference of the corresponding cell accommodating cavity to form a cell installation position 143. The plurality of cylindrical battery cells 150 are embedded one by one in the cell installation position 143 of the corresponding cell accommodating cavity.

[0041] The negative electrodes of the plurality of cylindrical battery cells 150 are connected based on one of the battery connectors 130 , and the positive electrodes of the plurality of cylindrical battery cells 150 are connected based on another of the battery connectors 130 ;

[0042] The porous baffle 120 is provided with a plurality of first through holes 121 and a plurality of second through holes 122 . The plurality of first through holes 121 expose the battery connector 130 , and the plurality of second through holes 122 communicate with the guide channel 142 .

[0043] The battery pack 1 is connected to the guide channel 142 along the direction in which the battery packs 10 are connected in series.

[0044] In the automotive power battery pack device of the present invention, a plurality of cell accommodating cavities are formed in the battery box 110 of the battery module 100. A plurality of support ribs 141 are protrudingly formed in the cell accommodating cavities. A guide channel 142 is formed between the bodies of the support ribs 141. The second through holes 122 of the porous baffle 120 at the openings at both ends of the battery box 110 communicate with the guide channel 142, allowing air to flow through the guide channel 142. The ends of the support ribs 141 surround and form a cell mounting position 143, and the cylindrical cell 150 is embedded in the cell mounting position 143. That is, each cylindrical cell 150 is surrounded by a guide channel 142, which facilitates air flow along the surface of the cylindrical cell 150 and facilitates heat dissipation of the cylindrical cell 150.

[0045] Moreover, the battery pack 1 is connected to the guide channel 142 along the direction of series connection of the battery packs 10, which can form a coherent heat dissipation channel, thereby avoiding heat accumulation in the battery pack 1 and facilitating heat dissipation of the cylindrical battery cells 150.

[0046] In addition, the vehicle power battery pack device of the present invention can be applied to electric vehicles and electric bicycles by controlling the number of parallel battery modules 100 and the number of series battery packs 10, and has wide practicality.

[0047] In some specific embodiments, see Figure 4 and Figure 5 The battery case 110 is a square-shaped housing composed of a symmetrically arranged first square tube column housing 111 and a second square tube column housing 112. The first square tube column housing 111 and the second square tube column housing 112 are fixedly connected by a first assembly tab 113; the square-shaped housing and the porous baffle 120 are fixedly connected by a second assembly tab 114. The square-shaped housing makes the battery module 100 easy to stack, making it convenient for users to manufacture battery packs 10 and battery packs 1.

[0048] In some specific embodiments, Figure 6 Schematic diagram of the three-dimensional structure of the battery connector in an embodiment of the present invention is shown. Any of the battery connectors 130 includes a plurality of battery connecting pieces 131. The plurality of battery connecting pieces 131 are connected in series based on battery connecting lines 132. A battery fuse 133 is provided on the battery connecting lines 132 between adjacent battery connecting pieces 131. Figure 4 and Figure 5 Any of the battery connecting pieces 131 contacts the electrode end of the corresponding cylindrical battery cell 150, and the plurality of battery connecting pieces 131 are correspondingly embedded in the plurality of first through holes 121. When the current exceeds the set value, the battery fuse 133 will quickly melt, automatically shutting off the circuit to prevent overloads and short circuits, thereby effectively protecting the cylindrical battery cell 150, battery module 100, battery pack 10, and battery pack 1.

[0049] In some specific embodiments, Figure 7 A schematic diagram of the inner surface structure of the porous baffle in an embodiment of the present invention is shown. A wiring groove 123 is provided on the side of the porous baffle 120 that contacts the battery box 110. The end opening of the wiring groove 123 is exposed on the side of the porous baffle 120, which is convenient for arranging various connecting wires.

[0050] In some specific embodiments, the battery box 110 is made of an insulating flame-retardant material, and the porous baffle 120 is made of an insulating flame-retardant material, which can effectively isolate the battery modules 100 and ensure the safety of the battery pack 1. Specifically, the insulating flame-retardant material can be polycarbonate, polyphenylene sulfide, or phenolic resin.

[0051] In some specific embodiments, see Figure 1A positive bus 20 is led out from the positive terminal of the battery pack 1, a main fuse 21 and an intelligent relay 22 are arranged in series on the positive bus 20, and the intelligent relay 22 is electrically connected to the battery control module 2; Figure 8 A schematic diagram of the circuit structure of the battery pack in an embodiment of the present invention is shown. A temperature monitoring sensor 160 is provided in any of the battery modules 100, and the temperature monitoring sensor 160 is electrically connected to the battery control module 2; a current monitoring circuit 170 and a voltage monitoring circuit 180 are provided in any of the battery packs 10, and the current monitoring circuit 170 and the voltage monitoring circuit 180 are both electrically connected to the battery control module 2.

[0052] When the current of the positive bus 20 exceeds the set value, the main fuse 21 will quickly blow, automatically cutting off the circuit to prevent circuit overload, short circuit, etc., thereby effectively protecting the battery pack 1; when the battery control module 2 detects that the temperature value, current value or voltage value is not within the normal working range, it can issue an instruction to control the intelligent relay 22 to cut off the circuit to ensure the safety of the battery pack 1.

[0053] Specifically, in the same battery pack 10 , the temperature monitoring sensors 160 in different battery modules 100 are scattered, ensuring that the detected temperature data can represent the temperature information of the entire battery pack 10 .

[0054] In some specific embodiments, the automotive power battery pack device further includes a fan module and a temperature control module, both of which are electrically connected to the battery control module 2. The fan module is used to provide airflow to the flow channel 142 of the battery pack 1, and the temperature control module is used to heat or cool the airflow. If the temperature of the battery pack 1 is too low, the battery control module 2 will issue instructions to control the fan module and the temperature control module to blow hot air into the flow channel 142 to accelerate the temperature increase of the cylindrical battery cells 150. If the temperature of the battery pack 1 is too high, the battery control module 2 will issue instructions to control the fan module and the temperature control module to blow cold air into the flow channel 142 to accelerate the temperature decrease of the cylindrical battery cells 150.

[0055] In some specific embodiments, the automotive power battery pack device further includes a charging circuit actuator and a discharging circuit actuator. The charging circuit actuator is electrically connected to the battery control module 2 and the battery pack 1, while the discharging circuit actuator is electrically connected to the battery control module 2 and the battery pack 1. The battery control module 2 can control the charging and discharging operations and charging and discharging power of the battery pack 1 through the charging and discharging circuit actuators. Furthermore, the charging and discharging circuit actuators physically separate the charging and discharging circuits, avoiding the traditional shared relay and improving safety.

[0056] In some specific embodiments, the automotive power battery pack device further includes a pre-charging relay electrically connected to the battery control module 2 and the battery pack 1. When the battery pack 1 is powered on or charged, the battery control module 2 controls the pre-charging relay to close first, creating a low-current path that allows the external power source or load to slowly approach the voltage of the battery pack 1. This balances the voltage between the battery pack 1 and the external power source or load, avoids surge currents caused by sudden voltage changes, and effectively protects the circuit and battery pack 1.

[0057] In the automotive power battery pack device of the present invention, each cylindrical battery cell 150 is surrounded by a guide channel 142 to facilitate air flow along the surface of the cylindrical battery cell 150, which is beneficial to the heat dissipation of the cylindrical battery cell 150; the battery pack 1 is connected to the guide channel 142 along the direction of series connection of the battery packs 10, which can form a coherent heat dissipation channel, thereby avoiding heat accumulation in the battery pack 1 and facilitating the heat dissipation of the cylindrical battery cell 150; in conjunction with the fan module and the temperature control module, rapid heat dissipation or rapid heating of the cylindrical battery cell 150 can also be achieved.

[0058] Moreover, the square structure of the shell makes it easy to stack the battery modules 100. By controlling the number of parallel battery modules 100 and the number of series battery packs 10, it can be applied to electric vehicles and electric bicycles, etc., and has wide practicality. The battery box 110 and the porous baffle 120 use insulating flame-retardant materials, which can effectively isolate each battery module 100 and ensure the safety of the battery pack 1.

[0059] In addition, a battery fuse 133 is provided in the battery connector 130 of each battery module 100, and a main fuse 21 and an intelligent relay 22 are provided on the positive bus 20 of the battery pack 1, forming multiple insurances, thereby effectively ensuring the safe operation of the battery pack 1.

[0060] The present invention also provides a control system for a vehicle power battery pack device, wherein the control system runs in a battery control module 2 and is used to control the battery pack 1 . Figure 9 The working diagram of the control system in the embodiment of the present invention is shown. The working process of the control system is as follows:

[0061] Collecting temperature data, current data, and voltage data of each battery pack 10;

[0062] Preprocess the collected temperature data, current data, and voltage data to filter out noise and outliers to improve data quality;

[0063] Determine whether the collected temperature data, current data, and voltage data are within the normal range; if not, issue instructions to control the corresponding modules in the intelligent relay 22, pre-charging circuit relay, charging circuit actuator, discharge circuit actuator, fan module, and temperature control module, so that the cylindrical battery cell 150, battery module 100, battery pack 10, and battery pack 1 operate within the normal temperature, current, and voltage range;

[0064] Specifically, if the voltage data and current data exceed the normal range, in the case of charging, the control system will control the charging circuit actuator to reduce the charging power; in the case of discharging, the control system will control the discharging circuit actuator to reduce the discharging power.

[0065] Furthermore, if the temperature data exceeds the normal range, when the temperature is low, the control system will send instructions to control the fan module and the temperature control module to blow hot air into the air guide channel 142 to accelerate the increase in the temperature of the battery pack 10; when the temperature is high, the control system will send instructions to control the fan module and the temperature control module to blow cold air into the air guide channel 142 to accelerate the decrease in the temperature of the battery pack 10.

[0066] In some specific embodiments, once the voltage, current or temperature of the battery pack 1, battery pack 10, battery module 100 and cylindrical battery cell 150 is abnormal, the control system will display corresponding fault information on the corresponding display terminal; when the situation is serious, the control system will also issue an early warning prompt.

[0067] The control system of the automotive power battery pack device of the present invention monitors the temperature data, current data and voltage data of each battery pack 10, and controls the intelligent relay 22, pre-charging circuit relay, charging circuit actuator, discharge circuit actuator, fan module and temperature control module based on this, thereby realizing precise management of the battery pack 1 and effectively ensuring the safety of the battery pack 1.

[0068] The above is a detailed introduction to a vehicle power battery pack device and a control system thereof provided in an embodiment of the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A vehicle power battery pack device, characterized in that: The vehicle power battery pack device includes a battery pack and a battery control module, wherein the battery control module is electrically connected to the battery pack; the battery pack is composed of a plurality of battery packs connected in series, and any of the battery packs is composed of a plurality of battery modules connected in parallel, and any of the battery modules is provided with a plurality of cylindrical cells connected in parallel; Any of the battery modules comprises a battery box with openings at both ends, a porous baffle fixed at the openings at both ends of the battery box, and a battery connector embedded in the porous baffle; The battery box is divided into a plurality of battery cell accommodating cavities, and a plurality of support ribs are protruding from any of the battery cell accommodating cavities. A flow guide channel is formed between the bodies of the plurality of support ribs. The ends of the plurality of support ribs are distributed around the geometric center circumference of the corresponding battery cell accommodating cavity to form battery cell installation positions. The plurality of cylindrical battery cells are embedded one by one in the battery cell installation positions of the corresponding battery cell accommodating cavity. The negative electrodes of the plurality of cylindrical battery cells are connected based on one of the battery connectors, and the positive electrodes of the plurality of cylindrical battery cells are connected based on another of the battery connectors; The porous baffle is provided with a plurality of first through holes and a plurality of second through holes, wherein the plurality of first through holes expose the battery connectors, and the plurality of second through holes are connected to the diversion channel; The battery pack is connected to the flow guide channel along the direction in which the battery packs are connected in series.

2. The vehicle power battery pack device according to claim 1, characterized in that: The battery box is a square structural shell, which is composed of a first square tube column shell and a second square tube column shell arranged symmetrically. The first square tube column shell and the second square tube column shell are fixedly connected based on a first assembly ear; the square structural shell and the porous baffle are fixedly connected based on a second assembly ear.

3. The vehicle power battery pack device according to claim 1, characterized in that: Any of the battery connectors includes a plurality of battery connecting plates, which are connected in series based on battery connecting lines. A battery fuse is provided on the battery connecting lines between adjacent battery connecting plates. Any of the battery connecting plates contacts the electrode end of the corresponding cylindrical battery cell, and the plurality of battery connecting plates are correspondingly embedded in the plurality of first through holes.

4. The vehicle power battery pack device according to claim 1, characterized in that: A wiring groove is provided on the side of the porous baffle contacting the battery box, and the end opening of the wiring groove is exposed on the side of the porous baffle.

5. The vehicle power battery pack device according to claim 1, characterized in that: The battery box is made of an insulating flame-retardant material, and the porous baffle is made of an insulating flame-retardant material.

6. The vehicle power battery pack device according to claim 1, characterized in that: A positive bus is led out from the positive terminal of the battery pack, a main fuse and an intelligent relay are connected in series on the positive bus, and the intelligent relay is electrically connected to the battery control module; A temperature monitoring sensor is provided in any of the battery modules, and the temperature monitoring sensor is electrically connected to the battery control module; Any of the battery packs is provided with a current monitoring circuit and a voltage monitoring circuit, and both the current monitoring circuit and the voltage monitoring circuit are electrically connected to the battery control module.

7. The vehicle power battery pack device according to claim 1, characterized in that: The vehicle power battery pack device further includes a fan module and a temperature control module, both of which are electrically connected to the battery control module; The fan module is used to provide a flow of air to the guide channel of the battery pack, and the temperature control module is used to heat or cool the flow of air.

8. The vehicle power battery pack device according to claim 1, characterized in that: The vehicle power battery pack device also includes a charging circuit actuator and a discharging circuit actuator. The charging circuit actuator is electrically connected to the battery control module and the battery pack, and the discharging circuit actuator is electrically connected to the battery control module and the battery pack.

9. The vehicle power battery pack device according to claim 1, characterized in that: The vehicle power battery pack device further includes a pre-charging circuit relay, which is electrically connected to the battery control module and the battery pack.

10. A control system for a vehicle power battery pack device according to any one of claims 1 to 9, characterized in that: The control system runs in the battery control module and is used to control the battery pack.

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