Power system, battery module and vehicle

Abstract

The invention discloses a power system, a battery module and a vehicle, the power system and a passenger compartment of the vehicle are arranged in a staggered mode in the horizontal direction, the power system comprises a motor and the battery module, the battery module comprises at least one battery monomer, the battery monomer is arranged around the peripheral face of the motor, and the multiple battery monomers are sequentially distributed in the axial direction of the motor. The traditional battery pack can be at least partially separated from the bottom of the automobile and integrated into the power system in the mode that the battery module is arranged on the outer side of the motor in a sleeving mode and integrated. The power system integrated with the battery module is staggered from the passenger compartment in the horizontal direction, so that the space occupied by a traditional battery pack in the height direction of the passenger compartment can be reduced or avoided.

Description

Technical Field

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

[0002] The motor drive system and battery system of traditional electric vehicles are arranged separately. The battery pack of the battery system is arranged below the passenger compartment, while the motor is arranged at the bottom of the front or rear compartment of the vehicle. As the range of electric vehicles continues to increase, the size of the battery pack in the height direction of the vehicle continues to increase, which will further squeeze the space of the passenger compartment. In order to balance the space of the passenger compartment, the height and styling design of the body will conflict with the layout of the whole vehicle, which brings constraints to the styling design of the whole vehicle. These will affect the user's driving comfort.

[0003] In view of this, there is an urgent need to provide a method to reduce or avoid the battery pack occupying the space in the height direction of the passenger compartment. Summary of the invention

[0004] The present invention provides a new technical solution for a power system, a battery module and a vehicle. By improving the structure of the power system, it is possible to reduce or avoid the situation where a traditional battery system occupies space in the height direction of a passenger compartment.

[0005] In one aspect of the present invention, a power system is provided, which is staggered with a passenger compartment of a vehicle in a horizontal direction, and includes a motor and a battery module. The battery module includes at least one battery cell, and the battery cell is arranged around the outer circumference of the motor. A plurality of the battery cells are distributed in sequence along the axial direction of the motor.

[0006] By adopting the method in the embodiment of the present invention, the battery module is sheathed and integrated on the outside of the motor, so that the traditional battery pack can be at least partially separated from the bottom of the car and integrated into the power system. By staggering the power system with integrated battery modules with the passenger compartment in the horizontal direction, the disadvantage of the traditional battery pack occupying and squeezing the passenger compartment can be reduced or avoided.

[0007] In addition, when the energy density of the battery module of the present application is large enough, it can directly replace the traditional battery pack at the bottom of the car. At the same time, by mounting the battery module on the outside of the motor, the noise generated by the high-frequency rotation of the motor can be reduced to play a role in buffering and vibration isolation.

[0008] In another aspect of the present invention, a battery module is provided. The battery module is used for the power system. The battery module includes at least one battery cell. The battery cell is arranged around the outer circumference of the motor. A plurality of the battery cells can be distributed in sequence along the axial direction of the motor.

[0009] In a third aspect of the present invention, there is provided a vehicle comprising a subframe;

[0010] The insurance component comprises a support part, both ends of which are connected to the sub-frame and can slide relative to the sub-frame, and the middle part of the support part is suspended;

[0011] The power system is connected to the middle part of the support part, the support part has a support position and a bending position, the support part can be bent along the height direction of the vehicle to switch between the support position and the bending position, and in the support position, the support part supports the power system at a first height;

[0012] In the bent position, under the action of the gravity of the power system, the two ends of the support part slide along the sub-frame, and the support part protrudes from the sub-frame toward the direction close to the ground and bends to drive the power system to a second height;

[0013] When the power system is at the first height, the distance between the power system and the ground is greater than the distance between the power system and the ground when the power system is at the second height.

[0014] Other features and advantages of the present specification will become apparent from the following detailed description of exemplary embodiments of the present specification with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the specification and, together with the description, serve to explain the principles of the specification.

[0016] Figure 1 is a partial structural schematic diagram of a power system in one embodiment of the present invention;

[0017] Figure 2 is a schematic structural diagram of a battery module of a power system in an embodiment of the present invention;

[0018] Figure 3 is along Figure 2 Sectional view along line AA;

[0019] Figure 4 is one of the axial cross-sectional views of a power system in another embodiment of the present invention;

[0020] Figure 5 is one of the radial cross-sectional views of the power system in the third embodiment of the present invention;

[0021] Figure 6 is the second axial cross-sectional view of the power system in the fourth embodiment of the present invention;

[0022] Figure 7 is the second radial cross-sectional view of the power system in the fifth embodiment of the present invention;

[0023] Figure 8 It is a partial structural schematic diagram of the insurance component in the present invention;

[0024] Fig. 9 is along Figure 8 Sectional view along line AA;

[0025] Fig.10 It is a schematic diagram of the safety component in the present invention being in a supporting position.

[0026] Description of reference numerals:

[0027] 1. Power system; 11. Protective shell; 12. Airbag; 111. Accommodation space;

[0028] 2. Motor; 21. Stator; 22. Rotor; 23. Output shaft; 24. Vibration isolation glue;

[0029] 3. Battery module; 31. Housing; 321. Pole assembly; 33. Solid-state battery cell; 34. Cooling element; 35. Insulation glue;

[0030] 4. Supporting part; 41. First section; 42. Second section; 44. First slide groove; 45. Mounting member; 46. Stop member; 47. Second slide groove;

[0031] 51. First mounting plate. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0033] In an embodiment of the present invention, a power system 1 of an electric vehicle is provided, and the power system 1 is staggered with the passenger compartment of the vehicle in the height direction of the vehicle. For example, the power system 1 is integrated into the subframe, and the power system 1 can also be placed in the front cabin of the vehicle, the rear end of the vehicle, or arranged near the wheels to be staggered with the passenger compartment in the horizontal direction to avoid occupying the space of the passenger compartment.

[0034] Specifically, if Figure 1 , Figure 4 and Figure 6 As shown, the power system 1 includes a motor 2 and a battery module 3. The motor 2 includes a stator 21, a rotor 22 and an output shaft 23, and the output shaft 23 is used to connect to the wheels of the vehicle. The stator 21 is arranged outside the rotor 22. The stator 21 is a cylindrical structure. At least one battery module 3 is sleeved on the outer circumference of the stator 21, which can be as shown in FIG. Figure 1As shown in the figure, a plurality of battery modules 3 are sleeved on the outer circumference of the stator 21, and it is also possible to Figure 4 As shown, only one battery module 3 is mounted outside the stator 21. Figure 1 , Figure 2 and Figure 3 It can be seen that the battery module 3 is annular, and the inner circle radius of the battery module 3 is matched with the outer diameter of the stator 21. A plurality of battery modules 3 are arranged in sequence along the axial direction of the stator 21.

[0035] Alternatively, if Figure 4 and Figure 6 As shown, a vibration isolation glue 24 is provided at the position where the stator 21 and the battery module 3 are in contact with each other, so as to reduce the influence of the vibration of the stator 21 on the battery module 3 .

[0036] In addition, those skilled in the art can adjust the number of battery modules 3 according to the cruising range of the vehicle and the power of the motor 2, and connect multiple battery modules 3 in series or in parallel.

[0037] By adopting the method in the embodiment of the present invention, the battery module 3 is integrated into the power system 1 by sleeve-mounting and integrating the battery module 3 on the outside of the motor 2. By staggering the power system 1 with the integrated battery module 3 with the passenger compartment in the horizontal direction, the disadvantage of the battery module occupying and squeezing the passenger compartment in the background technology can be reduced or avoided.

[0038] In addition, when the energy density of the battery module 3 of the present application is large enough, it can directly replace the traditional battery pack at the bottom of the car. At the same time, by mounting the battery module 3 on the outside of the motor 2, the noise generated by the high-frequency rotation of the motor 2 can be reduced to play a role in buffering and vibration isolation.

[0039] In some specific embodiments, see Figure 1 , Figure 2 , Figure 3 and Figure 6 Each battery module 3 includes a shell 31, which is annular. The shell 31 forms a receiving cavity. A laminated battery cell or a solid battery cell 33 is arranged in the receiving cavity.

[0040] For example, see Figure 4 and Figure 5 The battery module 3 adopts a laminated cell, which includes a pole piece assembly 321. The pole piece assembly 321 includes a stacked anode sheet, a cathode sheet, and a diaphragm. The pole piece assembly 321 is wound around the inner wall of the inner circle of the shell 31 along the circumference of the shell 31. The thickness of the laminated cell is adapted to the axial height of the shell 31.

[0041] Alternatively, see Figure 5A cooling member 34 is further provided between each layer of the pole piece assembly 321 after winding, and the cooling member 34 includes a cooling tube. For example, the cooling tubes are arranged in a serpentine shape. The coolant in the cooling tubes can be shared with the coolant of the motor 2. Of course, the cooling member 34 can also be in other forms, such as the cooling member 34 is a flexible cooling plate, etc., so as to achieve cooling of the battery module 3.

[0042] In another example, see Figure 7 The battery module 3 uses solid-state cells 33, which are arranged in a surrounding manner in the housing 31 and stacked in an array. Specifically, a plurality of groups of stacked solid-state cells 33 are arranged around the circumference of the housing 31. A cooling member 34 is provided between each adjacent group of solid-state cells 33 to cool the battery module 3.

[0043] In another example, see Figure 6 , multiple groups of solid-state batteries 33 can also be Figure 6 As shown, the solid-state battery cells 33 are stacked and distributed along the axial direction of the housing 31, and the stacking method of the solid-state battery cells 33 is not specifically limited here. Figure 6 In the embodiment, a cooling member 34 is provided between two adjacent groups of solid-state battery cells 33 distributed along the axial direction. Each solid-state battery cell 33 is bonded with an insulating adhesive 35.

[0044] In another example, several battery modules 3 with solid-state cells 33 may be separately provided outside the stator 21, several battery modules 3 with laminated cells may be separately provided, or battery modules 3 with solid-state cells 33 and battery modules 3 with laminated cells may be provided at the same time. The battery modules 3 are provided with interfaces, and the interfaces of each battery module 3 are adapted to each other. Thus, the power of the power system 1 can be flexibly adjusted.

[0045] In some embodiments, Figure 4 and Figure 6 As shown, the power system 1 further includes a protective shell 11 , in which the motor 2 and the battery module 3 are disposed, and the protective shell 11 is adapted to the space in which the power system 1 is arranged.

[0046] After the battery module 3 is sleeved on the stator 21, a protective shell 11 is used on the outside of the battery module 3 to protect the motor 2 and the battery module 3. The shape of the protective shell 11 is designed according to the space in which it is arranged. The cross-section of the protective shell 11 in the radial direction of the motor 2 can be a triangle, a rectangle, a polygon, or other irregular shapes, so as to be compatible with the space in which the power system 1 is installed.

[0047] Optionally, the protective shell 11 is an integrated structure formed by die-casting, and the protective shell 11 is a contoured structure, so that it can adapt to the space where the vehicle power system 1 is installed. At the same time, the protective shell 11 is also equipped with a motor controller (not shown in the figure), a reducer (not shown in the figure) and other multi-in-one components, thereby further improving the integration of the whole vehicle.

[0048] In one example, at least a portion of the side wall of the protective shell 11 is provided with a receiving space 111, for example, the side wall of the protective shell 11 is a double-layer structure, and the double-layer structure surrounds the receiving space 111. The airbag 12 is arranged in the receiving space 111. Thus, the airbag 12 can explode to the outside to protect the power system 1 in the event of a violent collision.

[0049] In the above embodiment, the protective shell 11 is integrated with the vehicle body floor, thereby improving the structural strength of the power system 1. Of course, in other embodiments of the present application, the protective shell 11 may not be integrated with the vehicle body floor, and when the vehicle collides, the power system 1 can be displaced relative to the vehicle body to avoid damage.

[0050] In traditional designs, since the battery system and the electric drive system are independent and separately set up, high-voltage wiring harnesses and cooling water pipes are needed to connect the battery system and the electric drive system. In this way, there will be wiring harness losses during the energy transmission process. Data shows that the efficiency loss of high-voltage wiring harnesses reaches 0.3%-1%.

[0051] In the present invention, after the battery module 3 and the motor 2 are integrated, the high-voltage wiring harness and the plug connector are arranged at both ends of the protective shell 11, so that the wiring harness length and the number of plug connectors can be reduced exponentially, thereby reducing the wiring harness loss during energy transmission.

[0052] In an embodiment of the present invention, a vehicle is further provided, the vehicle comprising a subframe, a safety assembly and the above-mentioned power system 1, wherein the safety assembly comprises a support portion 4. The protective shell 11 of the power system 1 is provided with a connecting piece (not shown in the figure), and the support portion 4 is connected to the connecting piece in a one-to-one correspondence. The support portion 4 is arranged on the subframe, and the power system 1 is connected to the subframe through the support portion 4.

[0053] Specifically, see Figure 8 and Fig.10 The two ends of the support part 4 are connected to the subframe and can slide relative to the subframe, and the middle part of the support part 4 is suspended. The power system 1 is connected to the middle part of the support part 4. The support part 4 has a supporting position and a bending position, and the support part 4 can be bent along the height direction of the vehicle to switch between the supporting position and the bending position.

[0054] In the supporting position, the supporting part 4 supports the power system 1 at a first height. In the bending position, under the gravity of the power system 1, the two ends of the supporting part 4 slide along the sub-frame, and the supporting part 4 protrudes and bends from the sub-frame toward the ground to drive the power system 1 to a second height.

[0055] When the power system 1 is at the first height, the distance between the power system 1 and the ground is greater than the distance between the power system 1 and the ground when the power system 1 is at the second height.

[0056] In this way, when the vehicle collides, the support portion 4 can be bent from the subframe toward the ground, thereby sinking the power system 1 away from the subframe to prevent the power system 1 from being subjected to impact force.

[0057] In addition, it is also possible to avoid the battery module in the power system 1 from being damaged and exploding.

[0058] In a specific embodiment, the support portion 4 includes a first section 41 and a second section 42 that are hinged to each other. The first section 41 and the second section 42 are hinged at one end close to each other so as to be able to rotate relative to each other. The first section 41 and the second section 42 are connected to the sub-frame at one end away from each other.

[0059] In the support position, such as Fig.10 As shown, the first section 41 and the second section 42 are approximately horizontal and do not bend relative to each other. When the support portion 4 is in the bent position, under the action of the gravity of the power system 1 itself, the first section 41 and the second section 42 bend and protrude toward the bottom of the vehicle.

[0060] In one example, a dissolvable layer (not shown) is provided at the position where the first section 41 and the second section 42 are hinged, which is used to support the first section 41 and the second section 42 to prevent the first section 41 and the second section 42 from rotating relative to each other. The dissolvable layer can be dissolved under high temperature, and the hinge opens freely. At this time, the support part 4 can no longer support the power system 1, but bends under the action of the power system 1.

[0061] The soluble layer includes a high-strength composite fiber material and a heating element for heating the composite fiber material. The heating element is, for example, a resistance wire or a voltage transformer.

[0062] After receiving the collision signal of the vehicle, the resistance wire generates heat to dissolve the composite fiber material, so that the first section 41 and the second section 42 lose the support of the fiber material. At this time, the power system 1 can drive the first section 41 and the second section 42 to protrude and bend toward the bottom of the vehicle.

[0063] By adopting such a method, when the vehicle is hit head-on or sideways, the power system 1 integrated with the battery module 3 can be moved toward the bottom of the vehicle as a whole through the support portion 4 to avoid damage to the power system 1 caused by the impact.

[0064] Optionally, the support portion 4 can only be bent in one direction toward the bottom of the vehicle. The one-way bending structure means that the first section 41 and the second section 42 can only be bent in the direction of the bottom of the vehicle, and cannot be bent in the opposite direction. In this way, the overall structure of the support portion 4 can maintain a certain range of motion within an appropriate space, and when it is impossible to avoid a collision, the support portion 4 can retain two options: reverse resistance and positive yielding.

[0065] In one embodiment, in order to increase the distance that the power system 1 moves further toward the bottom of the vehicle, the power system 1 is slidably connected to one of the first section 41 or the second section 42 .

[0066] like Figure 8 As shown, a first slide groove 44 is provided on the first section 41, and the first slide groove 44 has a certain depth along the thickness direction of the first section 41, and extends from the first section 41 toward the direction close to the second section 42. The first slide groove 44 is provided with a mounting member 45 that slidably cooperates with it, and the mounting member 45 is used to form a connection with a connecting member provided on the protective shell 11 of the power system 1.

[0067] When the vehicle collides, the first section 41 and the second section 42 bend and protrude toward the bottom of the vehicle. At the same time, the first section 41 and the second section 42 will tilt in the vertical direction toward each other, so that the power system 1 connected to the first section 41 will slide further toward the bottom of the vehicle along the first slide groove 44 in the inclined direction.

[0068] Further, see Fig. 9 A stopper 46 is also provided in the first slide groove 44. The stopper 46 is a component for limiting the position of the mounting member 45 in the sliding direction. The stopper 46 is, for example, a magnetic device, and the mounting member 45 is a material that can be attracted by the magnetic device. When the vehicle is normal, the magnetic device attracts and fixes the mounting member 45 to prevent the power system 1 from sliding. When the vehicle is hit, the magnetic device is powered off, so that the magnetic force disappears, and the mounting member 45 can slide freely along the first slide groove 44.

[0069] Of course, the stopper 46 may also be other stopper structures. For example, a retractable stopper is provided at the bottom of the first slide groove 44 , and the stopper and the mounting member 45 form a stopper. When the vehicle collides, the stopper retracts to release the stopper from the mounting member 45 .

[0070] In one embodiment, the subframe is further provided with a first mounting plate 51 and a second mounting plate, and the subframe can be connected to the first mounting plate 51 and the second mounting plate by welding. The first section 41 and the second section 42 are connected to the subframe through the first mounting plate 51 and the second mounting plate, and at the same time, the first section 41 and the second section 42 are slidably connected to the first mounting plate 51 and the second mounting plate. For example, the first mounting plate 51 and the second mounting plate are respectively provided with a second slide groove 47, and the first section 41 and the second section 42 are respectively provided with a slider structure, and a block structure that can be opened and closed is provided in the second slide groove 47, and the block structure is used to limit the slider structure in the second slide groove 47 to avoid the slider structure from sliding in the slide groove. When the vehicle is driving normally, the block structure is in a closed state and cooperates with the slider structure stopper. When the vehicle collides, the block structure is in an open state, so that the slider structure can be released so that the slider structure can slide along the second slide groove 47. By providing the first mounting plate 51 and the second mounting plate, the structure of the subframe can be avoided from being damaged.

[0071] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A power system, characterized in that: The power system is staggered with the passenger compartment of the vehicle in the horizontal direction. The power system includes a motor and a battery module. The battery module includes at least one battery cell. The battery cell is arranged around the outer circumference of the motor. A plurality of the battery cells are distributed in sequence along the axial direction of the motor.

2. The power system according to claim 1, characterized in that: Each of the battery cells comprises a shell, the shell is in a ring structure, a battery core is contained in the shell, and the shell is sleeved on the outside of the motor.

3. The power system according to claim 2, characterized in that: A cooling element is also provided in the battery core; The battery cell comprises a pole piece assembly, which comprises a stacked anode sheet, a cathode sheet and a diaphragm, the pole piece assembly is wound around the inner wall of the inner ring of the shell, and the cooling element is arranged between two adjacent layers of the pole piece assembly along the radial direction of the battery cell; or The battery cells are solid-state battery cells, the housing is provided with a plurality of groups of the solid-state battery cells stacked together, and the cooling element is disposed between each adjacent group of the solid-state battery cells.

4. The power system according to claim 1, characterized in that: Vibration isolation glue is arranged at the position where the motor is in contact with the inner ring of the shell.

5. The power system according to claim 1, characterized in that: It comprises a plurality of battery modules, each of which is provided with an interface for connecting with each other, and the interfaces of the battery modules can be adapted to each other.

6. The power system according to any one of claims 1 to 5, characterized in that: The power system further includes a protective shell, in which the motor and the battery module are both disposed, and the protective shell is adapted to a space in which the power system is arranged.

7. The power system according to claim 6, characterized in that: At least a portion of the side wall of the protective shell is configured with a receiving space, and an airbag is arranged in the receiving space.

8. A battery module, characterized in that: The battery module is used in a power system. The battery module includes at least one battery cell. The battery cell is arranged around the outer circumference of the motor. A plurality of the battery cells can be distributed in sequence along the axial direction of the motor.

9. The battery module according to claim 8, characterized in that: Each of the battery cells comprises a shell, the shell is in a ring structure, a battery core is contained in the shell, and the shell is sleeved on the outside of the motor.

10. The battery module according to claim 9, characterized in that: A cooling element is also provided in the battery core; The battery cell comprises a pole piece assembly, which comprises a stacked anode sheet, a cathode sheet and a diaphragm, the pole piece assembly is wound around the inner wall of the inner ring of the annular shell, and the cooling element is arranged between two adjacent layers of the pole piece assembly along the radial direction of the battery cell; or The housing is provided with a plurality of groups of the solid-state battery cells stacked in a stack, and the cooling element is arranged between each adjacent group of the solid-state battery cells.

11. A vehicle, characterized in that: include: Subframe; The insurance component comprises a support part, both ends of which are connected to the sub-frame and can slide relative to the sub-frame, and the middle part of the support part is suspended; The power system according to any one of claims 1 to 7, wherein the power system is connected to the middle portion of the support portion, the support portion has a support position and a bending position, the support portion can be bent along the height direction of the vehicle to switch between the support position and the bending position, and in the support position, the support portion supports the power system at a first height; In the bent position, under the action of the gravity of the power system, the two ends of the support part slide along the sub-frame, and the support part protrudes from the sub-frame toward the direction close to the ground and bends to drive the power system to a second height; When the power system is at the first height, the distance between the power system and the ground is greater than the distance between the power system and the ground when the power system is at the second height.

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