Modularized battery assembly, power driving system and oil-to-electricity automobile

Abstract

The utility model provides a modularization battery assembly, a power driving system and an oil-to-electricity automobile, the modularization battery assembly comprises a support, a battery module and a fixing assembly, the support is arranged on an automobile body; the battery module comprises a plurality of battery boxes which are electrically connected end to end in sequence, and the plurality of battery boxes are arranged on the bracket along the length direction and / or the width direction of the battery boxes; the fixing assembly is arranged between the multiple battery boxes and the vehicle body, located on the side, away from the support, of the battery module and used for fixing the battery boxes and the vehicle body. According to the battery assembly, the plurality of battery boxes are arranged on the bracket along the length and / or width direction, so that the space of the bracket can be fully utilized, the energy density of the battery module is improved, and the endurance mileage is increased without greatly increasing the size of a vehicle body; according to the modular design, the number and layout of the battery boxes can be flexibly adjusted, various requirements are met, the battery modules can be integrally mounted and dismounted, and only fixing assemblies need to be operated during battery replacement or maintenance, so that the maintenance efficiency is greatly improved, and the maintenance cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle conversion technology, and in particular to a modular battery module, a power drive system, and an electric vehicle converted from gasoline. Background Technology

[0002] Against the backdrop of increasingly prominent environmental protection demands and accelerated energy transition, the development of traditional fuel vehicles is limited due to problems such as environmental pollution caused by exhaust emissions and the depletion of fossil fuels. At the same time, electric vehicles, with their advantages of zero emissions, low noise, and high energy efficiency, have become the development trend of the automotive industry. The "oil-to-electric" vehicle has emerged, which is a modification of traditional fuel vehicles, replacing the fuel power system with an electric power system.

[0003] A battery pack compatible bracket for converted electric vehicles, with announcement number CN222432043U, includes a housing. Inside the housing, there is a battery fixing mechanism. The battery fixing mechanism includes two fixing brackets located inside the housing. Two push rods are fixedly connected to the opposite side of each of the two fixing brackets. The opposite ends of the two sets of push rods penetrate the housing and extend to the outside of the housing. Push plates are fixedly connected to the opposite ends of the two sets of push rods. Threaded rings are fixedly embedded on the opposite side of each of the two push plates. Threaded rods are rotatably connected to the left and right sides of the housing. The two threaded rods are threadedly connected to the two threaded rings respectively.

[0004] In existing electric vehicles converted from gasoline vehicles, the battery layout fails to make full use of the bracket space, resulting in low energy density of battery modules. It is difficult to accommodate more battery packs within the limited vehicle space, thus limiting the vehicle's driving range. Furthermore, the batteries lack modular design, making it impossible to flexibly adjust the number and layout of batteries according to different vehicle body requirements and energy requirements, which makes it difficult to meet diverse market demands. Utility Model Content

[0005] In view of this, this utility model proposes a modular battery pack, a power drive system, and a gasoline-to-electric vehicle, which can make full use of the bracket space, improve the energy density of the battery module, and increase the driving range without significantly increasing the vehicle size; moreover, the battery box adopts a modular design to meet diverse market demands.

[0006] The technical solution of this utility model is implemented as follows: Firstly, this utility model provides a modular battery assembly, including a bracket, a battery module, and a fixing component, wherein...

[0007] The bracket is mounted on the vehicle body;

[0008] The battery module includes multiple battery boxes that are electrically connected end to end, and the multiple battery boxes are arranged on the bracket along their length and / or width.

[0009] The fixing assembly is arranged between the plurality of battery boxes and the vehicle body and on the side of the battery module away from the support, and is used for fixing the battery boxes and the vehicle body.

[0010] On the basis of the above technical scheme, preferably, the support comprises a bracket, at least two supporting members and a loading plate, wherein,

[0011] The bracket is arranged on the vehicle body and is arranged in parallel along the driving direction of the vehicle body;

[0012] The at least two supporting members are arranged on the bracket and are arranged in parallel at intervals, and the cross-sectional shape of the supporting member is arranged in the shape of an isosceles trapezoid;

[0013] The loading plate is arranged between the at least two supporting members and on the side away from the bracket, and is used for carrying the battery module.

[0014] On the basis of the above technical scheme, preferably, the support further comprises a plurality of reinforcing members, wherein the loading plate is arranged in a hollow manner and has a cross-sectional shape in the shape of a broken line, the plurality of reinforcing members are arranged on both sides of the corners of the loading plate and are arranged at equal intervals along the width direction of the support, and the reinforcing members are used for reinforcing the carrying capacity of the loading plate.

[0015] On the basis of the above technical scheme, preferably, the loading plate comprises a first parallel section, a connecting section and a second parallel section, wherein,

[0016] The first parallel section is fixed between the sides of the at least two supporting members away from the bracket, and is used for mounting the battery boxes arranged in the width direction;

[0017] The connecting section is fixed perpendicularly on the first parallel section and is arranged on the side facing the bracket, and the plurality of reinforcing members are fixed between the first parallel section and the connecting section;

[0018] The second parallel section is fixed on the side of the connecting section away from the first parallel section and is perpendicular to the connecting section, and is used for mounting the battery boxes arranged in the length direction.

[0019] On the basis of the above technical scheme, preferably, the fixing assembly comprises a plurality of angle braces and at least two first fixing members, wherein,

[0020] The plurality of angle braces are fixed by bolts on the corners of the adjacent two battery boxes, and are used for fixing the battery boxes arranged in the width direction;

[0021] The at least two first fixing members are respectively fixed on the side faces of the most distal two battery boxes arranged in the length direction and facing away from each other, and the at least two first fixing members are respectively fixed on the side faces of the most distal two battery boxes arranged in the width direction and facing away from each other, and are used for fixing the battery module.

[0022] On the basis of the above technical scheme, preferably, the fixing assembly further comprises at least two second fixing members and a load bearing rod, wherein,

[0023] One end of the at least two second fixing members is arranged on the side face opposite to the farthest two side battery boxes arranged in the width direction, and the other end is fixedly connected with the load bearing rod;

[0024] The load bearing rod is arranged in the power cabin of the vehicle body and is located on the side of the battery module away from the support, and is used for fixing the position of the battery module.

[0025] On the basis of the above technical scheme, preferably, the side of each battery box away from the support is provided with a plurality of lifting ring members, and the lifting ring members are used for hoisting the battery box into the power cabin of the vehicle body.

[0026] In a second aspect, the utility model also provides a kind of power drive system, including modularization battery assembly, still including power distribution unit, control module, inverter, charging module and drive module, wherein,

[0027] The high-voltage connection end of the battery module is electrically connected with one end of the high-voltage connection end of the power distribution unit, and the other end of the high-voltage connection end of the power distribution unit is electrically connected with one end of the high-voltage connection end of the inverter, and the power distribution unit is used for charging and discharging control of the battery module;

[0028] The other end of the high-voltage connection end of the inverter is electrically connected with drive module and charging module respectively, for converting current to drive module power supply and charging battery module;

[0029] The power distribution unit has main BMS battery management system, each battery box has sub BMS battery management system, and the sub BMS battery control system of each battery box is connected with the main BMS battery control system communication, and power distribution unit, charging module and drive module are connected with control module communication, for monitoring system output signal.

[0030] On the basis of the above technical scheme, preferably, the power distribution unit includes MSD insurance, pre-charge resistor, pre-charge relay, main positive relay, charging relay, shunt and main negative relay, wherein,

[0031] The first and the last of the plurality of battery boxes are sequentially and electrically connected to form a battery module, the positive output end of the battery module is electrically connected with one end of an MSD fuse, the other end of the MSD fuse is respectively electrically connected with a pre-charging resistor, one end of the contact of a main positive relay and one end of the contact of a charging relay, the other end of the contact of the pre-charging resistor is electrically connected with one end of the contact of a pre-charging relay, the other end of the contact of the pre-charging relay is electrically connected with the other end of the contact of the main positive relay and the main positive output end, and the other end of the contact of the charging relay is electrically connected with the charging positive input end; the negative output end of the battery module is electrically connected with a shunt, and the other end of the shunt is electrically connected with one end of the contact of a main negative relay, and the other end of the contact of the main negative relay is respectively electrically connected with the main negative output end and the charging negative input end.

[0032] In a third aspect, the utility model also provides a kind of oil changes electric vehicle, including power drive system.

[0033] The modular battery assembly, power drive system and oil changes electric vehicle of the utility model have the following beneficial effects relative to the prior art:

[0034] (1) by being arranged on the support in length and / or width direction multiple battery boxes, can make full use of support space, improve the energy density of battery module, increase the endurance mileage under not substantially increasing the size of vehicle body;Modular design can flexibly adjust the number and layout of battery box, satisfy various needs, and battery module can be integrally installed and removed, and when replacing battery or maintenance, operation fixed assembly can be carried out, substantially improve maintenance efficiency and reduce maintenance cost;

[0035] (2) by being respectively installed on different paragraphs of carrier plate different arrangement direction battery box, space on support can be reasonably utilized, avoid the problem of space waste caused by single battery box arrangement mode, so that more battery boxes can be accommodated in limited space, improve the energy density of battery module, and further improve the endurance capability of vehicle and other equipment;

[0036] (3) by the lifting ring piece arranged on battery box, hoisting equipment can quickly and accurately lift battery box and place it into the power cabin of vehicle body, improve installation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will briefly introduce the drawings needed to be used in embodiment or prior art description, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0038] Figure 1 It is the perspective view of the modular battery assembly of the utility model;

[0039] Figure 2 It is a perspective view of the support of the modular battery assembly of the utility model;

[0040] Figure 3 It is another perspective view of the support of the modular battery assembly of the utility model;

[0041] Figure 4 It is a schematic view of the connection between the battery module and the power distribution unit of the power drive system of the utility model;

[0042] Figure 5 It is a principle block diagram of the power drive system of the utility model;

[0043] Figure 6 It is a wiring circuit diagram of the power distribution unit and the battery module of the power drive system of the utility model;

[0044] Figure 7 It is an installation schematic view of the modular battery assembly of the oil-to-electricity automobile of the utility model;

[0045] Figure 8 It is another perspective installation schematic view of the modular battery assembly of the oil-to-electricity automobile of the utility model. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the utility model will be clearly and completely described in combination with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0047] As shown in Figures 1-3 The utility model discloses a kind of modular battery assembly, including support 1, battery module 2 and fixed assembly 3, wherein, support 1 is arranged on vehicle body;Battery module 2 includes a plurality of head-to-tail electrically connected battery box 21, and a plurality of battery box 21 is arranged on support 1 along its length direction and / or width direction;Fixed assembly 3 is arranged between a plurality of battery box 21 and vehicle body, and located at the side of battery module 2 away from support 1, for fixing battery box 21 with vehicle body.

[0048] It should be noted that the plurality of battery boxes 21 are arranged on the support 1 along the length direction and / or the width direction, which can make full use of the space provided by the support 1, so that the battery module 2 can achieve a high energy density in a limited vehicle body space, and more battery boxes 21 can be accommodated in the electric vehicle without significantly increasing the size of the vehicle body, thereby increasing the cruising range of the vehicle; and since the modular design is adopted, the number and layout of the battery boxes 21 in the battery module 2 can be flexibly adjusted according to different vehicle body requirements and energy requirements to meet diversified market demands, and at the same time, the modular design enables the battery module 2 to be installed and disassembled as a whole; when the battery needs to be replaced or maintained, the battery module 2 can be removed from the support 1 by operating the fixing assembly 3, without the need for complex operation of the individual battery boxes 21, thereby greatly improving the maintenance efficiency and reducing the maintenance cost.

[0049] The support 1 in the embodiment includes a bracket 11, at least two support members 12 and a carrier plate 13, wherein the bracket 11 is arranged on the vehicle body and is arranged in parallel along the driving direction of the vehicle body; the at least two support members 12 are arranged on the bracket 11 and are arranged in parallel at intervals, and the cross-sectional shape of the support member 12 is arranged in the shape of an isosceles trapezoid; and the carrier plate 13 is arranged between the at least two support members 12 and is arranged on the side away from the bracket 11, for carrying the battery module 2.

[0050] It should be noted that the bracket 11 is fixed on the cross beam of the vehicle body, which provides a stable foundation for the entire support 1, can effectively transmit the weight of the battery module 2 to the vehicle body, and ensures that the support 1 will not displace or deform due to uneven stress during vehicle driving, and the cross-sectional shape of the support member 12 is arranged in the shape of an isosceles trapezoid, which can more evenly disperse the force to the bracket 11 when bearing the pressure, thereby avoiding local stress concentration and improving the carrying capacity and service life of the support member 12.

[0051] The support 1 in the embodiment further includes a plurality of reinforcing members 14, wherein the carrier plate 13 is arranged in a hollow manner and has a cross-sectional shape in the shape of a broken line, and the plurality of reinforcing members 14 are arranged on both sides of the corners of the carrier plate 13 and are arranged at equal intervals along the width direction of the support 1, for reinforcing the carrying capacity of the carrier plate 13.

[0052] It should be noted that the hollow design of the carrier plate 13 can reduce its weight under the premise of ensuring certain bearing capacity, which helps to reduce the weight of the entire battery assembly, improve the energy efficiency of the vehicle, and the arrangement of the reinforcing piece 14 can effectively resist deformation and damage caused by the weight of the battery module 2 and various forces generated during vehicle driving, improve the overall structural strength of the carrier plate 13, and the plurality of reinforcing pieces 14 are arranged at equal intervals along the width direction of the bracket 1, which can effectively strengthen the carrier plate 13 at different positions, avoiding the situation of local over-strength or under-strength, and ensuring the installation stability of the battery module 2.

[0053] The carrier plate 13 in the embodiment includes a first parallel section 131, a connecting section 132, and a second parallel section 133, wherein the first parallel section 131 is fixed between at least two support pieces 12 away from the bracket 11, for mounting the battery boxes 21 arranged along the width direction; the connecting section 132 is fixed vertically on the first parallel section 131 and is arranged towards the side of the bracket 11, and the plurality of reinforcing pieces 14 are fixed between the first parallel section 131 and the connecting section 132; the second parallel section 133 is fixed on the side of the connecting section 132 away from the first parallel section 131 and is perpendicular to the connecting section 132, for mounting the battery boxes 21 arranged along the length direction.

[0054] It should be noted that the segmented design of the carrier plate 13 can flexibly adapt to battery boxes 21 arranged in different directions; the first parallel section 131 is used to mount battery boxes 21 arranged along the width direction, and the second parallel section 133 is used to mount battery boxes 21 arranged along the length direction, so that the bracket 1 can be adjusted according to the specific layout requirements of the battery module 2, improving the versatility and applicability of the bracket 1, and meeting the installation requirements of battery modules of various specifications and arrangement modes.

[0055] In the embodiment, by mounting battery boxes 21 arranged in different directions on different sections of the carrier plate 13, the space on the bracket 1 can be more reasonably utilized, avoiding the problem of space waste caused by single arrangement mode of the battery boxes 21, so that more battery boxes 21 can be accommodated in a limited space, improving the energy density of the battery module 2, and further improving the endurance of the vehicle and other equipment.

[0056] The fixing assembly 3 in the embodiment includes a plurality of angle braces 31 and at least two first fixing pieces 32, wherein the plurality of angle braces 31 are fixed by bolts at each corner of adjacent two battery boxes 21, for fixing the battery boxes 21 arranged along the width direction; the at least two first fixing pieces 32 are respectively fixed on the side faces of the most distant two battery boxes 21 arranged along the length direction and opposite to each other, and the at least two first fixing pieces 32 are respectively fixed on the side faces of the most distant two battery boxes 21 arranged along the width direction and opposite to each other, for fixing the battery module 2.

[0057] It should be noted that the plurality of angle supports 31 are fixed at the corners of each side of the adjacent two battery boxes 21, and can constrain the battery boxes 21 arranged in the width direction from multiple angles, effectively prevent the relative displacement of the battery boxes 21 in the horizontal direction and the vertical direction, and ensure the connection stability and integrity between the battery boxes 21. At least two first fixing members 32 are respectively fixed on the side face opposite to the farthest two side battery boxes 21 arranged in the length direction and the side face opposite to the farthest two side battery boxes 21 arranged in the width direction, which can fix the battery module 2 from multiple directions, and further enhance the stability of the battery module 2 on the vehicle body, preventing it from loosening or falling off due to factors such as vibration and impact during vehicle driving.

[0058] In the embodiment, the setting of the angle support 31 and the first fixing member 32 not only plays a role in fixing the battery box 21, but also enhances the overall structural strength of the battery module 2, and can connect each battery box 21 into a whole to jointly bear various forces and vibrations during vehicle driving, thereby improving the anti-deformation ability and reliability of the battery module 2.

[0059] The fixing assembly 3 in the embodiment further comprises at least two second fixing members 33 and a load-bearing rod 34. One end of each of the at least two second fixing members 33 is arranged on the side face opposite to the farthest two side battery boxes 21 arranged in the width direction, and the other end is fixedly connected with the load-bearing rod 34. The load-bearing rod 34 is arranged across the power compartment of the vehicle body and located on the side of the battery module 2 away from the support 1, and is used for fixing the position of the battery module 2.

[0060] It should be noted that one end of each of the at least two second fixing members 33 is arranged on the side face opposite to the farthest two side battery boxes 21 arranged in the width direction, and the other end is fixedly connected with the load-bearing rod 34. This makes the battery module 2 have additional fixing support in the width direction, further limits the displacement of the battery module 2 in the horizontal direction, enhances the overall fixing stability of the battery module 2, and the load-bearing rod 34 is arranged across the power compartment of the vehicle body, thereby providing a stable support basis for the second fixing member 33, so that the second fixing member 33 can more effectively transmit the force of the battery module 2 to the vehicle body, and ensure the reliable fixing of the fixing assembly 3 to the battery module 2.

[0061] In the embodiment, each battery box 21 away from the support 1 is provided with a plurality of lifting ring members 4, which are used for hoisting the battery box 21 into the power compartment of the vehicle body.

[0062] It should be noted that the plurality of lifting ring members 4 provide a clear lifting point for the lifting equipment. When hoisting the battery box 21 into the power compartment of the vehicle body, the hook of the lifting equipment can be directly hung on the lifting ring member 4, which is simple and convenient to operate, and can quickly and accurately lift the battery box 21 and place it into the power compartment of the vehicle body, thereby improving the installation efficiency.

[0063] As Figures 3-6 shown, the second aspect, the utility model still provides a kind of power drive system, including modular battery module, still including distribution unit 5, control module 6, inverter 7, charging module 8 and drive module 9, wherein, the high voltage connection end of battery module 2 is electrically connected with the one end of the high voltage connection end of distribution unit 5, the other end of the high voltage connection end of distribution unit 5 is electrically connected with the one end of the high voltage connection end of inverter 7, distribution unit 5 is used to charge-discharge control to battery module 2;The other end of the high voltage connection end of inverter 7 is electrically connected with drive module 9 and charging module 8 respectively, for converting current to drive module 9 power supply and charge battery module 2;Distribution unit 5 has main BMS battery management system, each battery box 21 all has sub BMS battery management system, the sub BMS battery control system of each battery box 21 is connected with main BMS battery control system communication, and distribution unit 5, charging module 8 and drive module 9 are all connected with control module 6 communication, for monitoring system output signal.

[0064] Specifically, drive module 9 is three-phase motor, the low voltage connection end of distribution unit 5 is electrically connected with other low voltage system in vehicle and control module 6 respectively, for low voltage power supply.

[0065] It needs to be explained that, modular battery module is as the energy storage unit of system, provides electric energy for entire power drive system, the high voltage connection end of battery module 2 is electrically connected with the one end of the high voltage connection end of distribution unit 5, realizes the transmission of electric energy.The sub BMS battery management system of each battery box 21 is connected with the main BMS battery management system of distribution unit 5 communication, to facilitate main BMS to carry out unified management and monitoring to each battery box 21;Distribution unit 5 accurately controls the charge-discharge process of battery module 2, ensures the safe, efficient use of battery, distribution unit 5 has main BMS battery management system, is connected with the sub BMS battery management system of each battery box 21 communication, obtains the state information of each battery box 21 in real time, such as voltage, current, temperature etc., and adjusts charge-discharge strategy according to these information, distributes the electric energy provided by battery module 2 to inverter 7, to provide suitable electric energy for drive module 9 and charging module 8, and distribution unit 5 is connected with control module 6 communication, transmits battery state and charge-discharge control etc. Information to control module 6;Control module 6 is as the control center of system, receives the output signal of distribution unit 5, charging module 8 and drive module 9, monitors and manages entire power drive system;According to the information received, coordinate the work of each component, ensure the stable operation of system;Inverter 7 converts the direct current provided by distribution unit 5 into alternating current, to meet the power supply demand of drive module 9 and charge battery module 2, and converts the alternating current generated when three-phase motor is decelerated into direct current to charge battery module 2;Drive module 9 converts the alternating current provided by inverter 7 into mechanical energy, drives vehicle etc. Equipment runs.

[0066] The working process is as follows: the control module 6 sends a starting instruction, the power distribution unit 5 determines whether the state of the battery module 2 is suitable for starting according to the information of the main BMS and each sub-BMS, if the state is normal, the power distribution unit 5 allows the battery module 2 to supply power to the inverter 7, the inverter 7 converts the direct current into alternating current to provide power for the driving module 9, and the driving module 9 drives the vehicle to start; the control module 6 continuously monitors the output signals of the power distribution unit 5, the charging module 8 and the driving module 9, and adjusts the working parameters of each component according to the driving state of the vehicle and the state of the battery; the power distribution unit 5 reasonably controls the discharge current of the battery module 2 according to the instruction of the main BMS, to ensure the safe use of the battery; when the vehicle needs to be charged, the control module 6 sends a charging instruction, the charging module 8 obtains power through the inverter 7 to charge the battery module 2; the power distribution unit 5 and the main BMS monitor the charging process to ensure that the charging current, voltage and other parameters are within the safe range.

[0067] It can be understood that the modular battery assembly facilitates the maintenance, replacement and upgrading of the battery, improves the flexibility and scalability of the system, and the communication connection of the main BMS and the sub-BMS realizes the fine management of the battery module and improves the use efficiency and safety of the battery.

[0068] The power distribution unit 5 in the embodiment includes an MSD fuse 51, a pre-charging resistor 52, a pre-charging relay 53, a main positive relay 54, a charging relay 55, a shunt 56 and a main negative relay 57, wherein the heads and tails of the plurality of battery boxes 21 are sequentially and electrically connected to form the battery module 2, the positive output end of the battery module 2 is electrically connected to one end of the MSD fuse 51, the other end of the MSD fuse 51 is electrically connected to the pre-charging resistor 52, the contact one end of the main positive relay 54 and the contact one end of the charging relay 55, the other end of the pre-charging resistor 52 is electrically connected to the contact one end of the pre-charging relay 53, the other end of the contact of the pre-charging relay 53 is electrically connected to the other end of the contact of the main positive relay 54 and the positive output end, the other end of the contact of the charging relay 55 is electrically connected to the positive input end of the charging, the negative output end of the battery module 2 is electrically connected to the shunt 56, the other end of the shunt 56 is electrically connected to the contact one end of the main negative relay 57, and the other end of the contact of the main negative relay 57 is electrically connected to the main negative output end and the negative input end of the charging.

[0069] The working process is as follows: when the system starts, the control module 6 sends a pre-charging instruction, the pre-charging relay 53 is closed, and the main positive relay 54 and the charging relay 55 are kept open. The positive electrode of the battery module 2 supplies power to the MSD fuse 51, the pre-charging resistor 52 and the pre-charging relay 53, which slowly charges the subsequent capacitors and other elements, and the shunt 56 monitors the output current of the battery module 2 in real time and feeds back the current signal to the control module 6.

[0070] When the capacitor is charged to a certain extent, the control module 6 issues an instruction, the pre-charge relay 53 is disconnected, the main positive relay 54 is closed, at this time, the positive electrode power of the battery module 2 is transmitted to the main positive output through the MSD fuse 51 and the main positive relay 54, and the components such as the inverter 7 are powered; the main negative relay 57 is always in a closed state, ensuring that the negative electrode of the battery module 2 is in communication with the main negative output and the charging negative input;

[0071] When the vehicle needs to be charged, the control module 6 issues a charging instruction, the charging relay 55 is closed, the positive electrode of the charging power source is connected with the positive electrode of the battery module 2 through the charging positive input, the charging relay 55 and the negative electrode of the charging power source is connected with the negative electrode of the battery module 2 through the charging negative input and the main negative relay 57, the charging of the battery module 2 is realized, and the shunt 56 continues to monitor the charging current and feeds back the current information to the control module 6, so that the control module 6 adjusts the charging parameters.

[0072] As shown in Figures 7-8 The utility model discloses a kind of oil changes electric vehicle, including power drive system.

[0073] The above is only the preferred embodiment of the utility model, and is not used to limit the utility model, any modification, equivalent replacement, improvement etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A modular battery assembly, characterized in that, It includes a bracket (1), a battery module (2), and a fixing component (3), wherein, The bracket (1) is installed on the vehicle body; The battery module (2) includes multiple battery boxes (21) that are electrically connected end to end, and the multiple battery boxes (21) are arranged on the bracket (1) along their length and / or width directions; The fixing component (3) is set between the multiple battery boxes (21) and the vehicle body, and is located on the side of the battery module (2) away from the bracket (1), for fixing the battery box (21) to the vehicle body.

2. The modular battery assembly as described in claim 1, characterized in that: The bracket (1) includes a bracket (11), at least two support members (12), and a carrier plate (13), wherein, The bracket (11) is installed on the vehicle body and is installed parallel to the vehicle body in the direction of travel; At least two support members (12) are provided on the bracket (11), and at least two support members (12) are arranged in parallel at intervals, and the cross-sectional shape of the support member (12) is an isosceles trapezoid. The carrier plate (13) is disposed between at least two supports (12) and located on the side away from the bracket (11) for carrying the battery module (2).

3. The modular battery assembly as described in claim 2, characterized in that: The bracket (1) also includes multiple reinforcing members (14), wherein the carrier plate (13) is hollowed out and has a broken cross-section. Multiple reinforcing members (14) are arranged on both sides of the corner of the carrier plate (13) and are evenly spaced along the width direction of the bracket (1) to enhance the load-bearing capacity of the carrier plate (13).

4. The modular battery assembly as described in claim 3, characterized in that: The carrier plate (13) includes a first parallel segment (131), a connecting segment (132), and a second parallel segment (133), wherein, The first parallel segment (131) is fixed between at least two supports (12) on the side away from the bracket (11) for mounting the battery box (21) arranged in the width direction. The connecting section (132) is vertically fixed on the first parallel section (131) and is arranged on the side facing the bracket (11). Multiple reinforcing members (14) are fixed between the first parallel section (131) and the connecting section (132). The second parallel segment (133) is fixed on the side of the connecting segment (132) away from the first parallel segment (131) and perpendicular to the connecting segment (132), and is used to install the battery box (21) arranged along the length direction.

5. The modular battery assembly as described in claim 1, characterized in that: The fixing component (3) includes multiple corner braces (31) and at least two first fasteners (32), wherein, Multiple corner braces (31) are fixed to the corners of two adjacent battery boxes (21) by bolts to fix the battery boxes (21) arranged along the width direction. At least two first fasteners (32) are respectively fixed on the opposite side of the farthest two battery boxes (21) arranged along the length direction, and at least two first fasteners (32) are on the opposite side of the farthest two battery boxes (21) arranged along the width direction, for fixing the battery module (2).

6. The modular battery assembly as described in claim 5, characterized in that: The fixing component (3) also includes at least two second fixing members (33) and a load-bearing rod (34), wherein, At least two second fasteners (33) have one end located on the opposite side of the two battery boxes (21) arranged along the width direction, and the other end is fixedly connected to the load-bearing rod (34). The load-bearing rod (34) is installed across the power compartment of the vehicle body and is located on the side of the battery module (2) away from the bracket (1) to fix the position of the battery module (2).

7. The modular battery assembly as described in claim 1, characterized in that: Each battery box (21) is provided with multiple lifting rings (4) on the side away from the bracket (1). The lifting rings (4) are used to lift the battery box (21) into the vehicle's power compartment.

8. A power drive system, characterized in that: The modular battery assembly, comprising any one of claims 1-7, further comprises a power distribution unit (5), a control module (6), an inverter (7), a charging module (8), and a drive module (9), wherein, The high voltage connection terminal of the battery module (2) is electrically connected to one end of the high voltage connection terminal of the power distribution unit (5), and the other end of the high voltage connection terminal of the power distribution unit (5) is electrically connected to one end of the high voltage connection terminal of the inverter (7). The power distribution unit (5) is used to control the charging and discharging of the battery module (2). The other end of the high voltage connection terminal of the inverter (7) is electrically connected to the drive module (9) and the charging module (8) respectively, and is used to convert the current to power the drive module (9) and charge the battery module (2); The power distribution unit (5) has a main BMS battery management system, and each battery box (21) has a sub-BMS battery management system. The sub-BMS battery control system of each battery box (21) is connected to the main BMS battery control system. The power distribution unit (5), the charging module (8) and the drive module (9) are all connected to the control module (6) to monitor the system output signals.

9. The power drive system as described in claim 8, characterized in that: The power distribution unit (5) includes an MSD fuse (51), a pre-charge resistor (52), a pre-charge relay (53), a main positive relay (54), a charging relay (55), a shunt (56), and a main negative relay (57), wherein, Multiple battery boxes (21) are electrically connected end to end to form a battery module (2). The positive output terminal of the battery module (2) is electrically connected to one end of the MSD fuse (51). The other end of the MSD fuse (51) is electrically connected to one contact of the pre-charge resistor (52), one contact of the main positive relay (54), and one contact of the charging relay (55). The other end of the pre-charge resistor (52) is electrically connected to one contact of the pre-charge relay (53). The other end of the contact of the main positive relay (54) is electrically connected to the other end of the contact of the main positive relay (54) and electrically connected to the main positive output terminal. The other end of the contact of the charging relay (55) is electrically connected to the charging positive input terminal. The negative output terminal of the battery module (2) is electrically connected to the shunt (56). The other end of the shunt (56) is electrically connected to one end of the contact of the main negative relay (57). The other end of the contact of the main negative relay (57) is electrically connected to the main negative output terminal and the charging negative input terminal respectively.

10. A gasoline-to-electric vehicle, characterized in that: Includes the power drive system as described in any one of claims 8-9.

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