Battery pack assembly, battery pack component, and electric vehicle

Abstract

The present invention discloses a battery pack assembly, a battery pack component, and an electric vehicle. The battery pack assembly includes: a battery pack, which is configured to be installed in a battery fixing seat of an automobile, and the battery pack is capable of moving in the length direction of the battery pack and / or in the thickness direction of the battery pack within the battery fixing seat; a liquid cooling plug, which is installed on the battery pack, and the liquid cooling plug is configured to be inserted into a heat dissipation system of the automobile and communicate with the heat dissipation system, and the insertion direction of the liquid cooling plug is the same as the moving direction of the battery pack. The battery pack component includes a battery fixing seat and the battery pack assembly as described above. The electric vehicle includes the battery pack component as described above. The present invention can balance the temperature of the battery pack, improve the full capacity of the battery pack, and directly improve performance indicators such as the limited use environment of the battery pack in the electric vehicle, the vehicle power performance, and the battery pack life.

Description

Technical Field

[0001] The present invention relates to a battery pack assembly, a battery pack component and an electric vehicle. Background Art

[0002] There are mainly two ways to obtain energy for electric vehicles: charging and battery swapping. Since the battery swapping method can achieve rapid replenishment of electric energy, reduce the waiting time of customers, and improve the utilization rate of battery swapping stations. In addition, the battery can be centrally charged at night, realizing "peak shaving and energy storage" of the power load. At the same time, the comprehensive utilization efficiency of power equipment is improved, and the service life of the battery is extended, which has high popularization value and economic significance.

[0003] Since the battery pack needs to be frequently replaced, currently, the battery packs used in battery-swapping electric vehicles usually adopt the natural cooling method, that is, the heat generated by the battery is transferred to the outer shell of the battery pack through the battery case to achieve heat exchange and dissipation with the outside world; the battery pack needs to be heated by an external device (heating mold) and transferred to the battery in a low-temperature environment to ensure the normal operating temperature of the battery pack. However, as the specific energy of the battery gradually increases and the battery power increases, the battery heat generation increases, and the charge and discharge capacity of the battery decreases, directly affecting technical indicators such as battery performance and life. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defects in the prior art that the heat generation of the battery pack increases, the charge and discharge capacity of the battery decreases, and directly affect the battery performance, life and other defects, and to provide a battery pack assembly, a battery pack component and an electric vehicle.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] A battery pack assembly, characterized in that it includes:

[0007] A battery pack, which is used to be installed in the battery fixing seat of the vehicle, and the battery pack can move along the length direction and / or the thickness direction of the battery pack in the battery fixing seat;

[0008] A liquid cooling plug-in, which is installed on the battery pack, and the liquid cooling plug-in is used to be inserted into the heat dissipation system of the vehicle and communicate with the heat dissipation system, and the insertion direction of the liquid cooling plug-in is the same as the moving direction of the battery pack.

[0009] In this solution, adopting the above structural form, the battery pack is cooled by the liquid cooling plug-in, which can balance the temperature of the battery pack, improve the full capacity of the battery pack, and directly improve the service life of the battery pack. At the same time, it is convenient for plugging and meets the frequent replacement.

[0010] Preferably, the liquid cooling plug-in includes at least one heat dissipation pipe disposed within the battery pack, and both ends of the heat dissipation pipe are exposed on the outer surface of the battery pack and are used for communicating with the heat dissipation system.

[0011] In this solution, adopting the above structural form, the heat dissipation pipe can achieve internal circulation cooling of the battery pack, effectively dissipate heat from the battery pack, and improve the performance and service life of the battery pack.

[0012] Preferably, at least one first guiding portion is provided on the side wall of the battery pack, and the first guiding portion extends and protrudes along the insertion direction of the liquid cooling plug-in;

[0013] And / or, the first guiding portion is recessed inward along the insertion direction of the liquid cooling plug-in.

[0014] In this solution, adopting the above structural form, the first guiding portion plays a role of guiding and positioning, improves the insertion accuracy between the battery pack assembly and the heat dissipation system, greatly enhances the connection stability of the liquid cooling plug-in, and effectively avoids leakage.

[0015] Preferably, the battery pack assembly further includes an electrical connector, the electrical connector includes a pole mounting seat and a conductive pole, the pole mounting seat is connected to the battery pack, an installation hole is provided in the pole mounting seat, the conductive pole passes through the installation hole, and at least one limiting portion is provided on the outer wall surface of the conductive pole, and the limiting portion is used to limit the inward movement of the conductive pole relative to the pole mounting seat along the axis direction of the installation hole.

[0016] In this solution, adopting the above structural form, the limiting portion abuts against the pole mounting seat and limits the inward movement of the conductive pole in the axis direction within the installation hole, improves the connection reliability between the conductive pole and the pole mounting seat, and further improves the connection reliability of the electrical connector.

[0017] Preferably, the axis direction of the installation hole is the same as the insertion direction of the liquid cooling plug-in.

[0018] In this solution, adopting the above structural form, the limiting portion can effectively limit the movement of the conductive pole within the pole mounting seat during the plugging process, effectively avoid the offset and dislocation phenomenon of the conductive pole during the plugging process, and improve the electrical connection reliability of the electrical connector during the plugging process.

[0019] Preferably, the limiting portion protrudes outward along the radial direction of the installation hole, and the limiting portion abuts against the inner wall surface of the installation hole.

[0020] In this solution, adopting the above structural form, the structure is simple and convenient for processing and manufacturing.

[0021] Preferably, a second guiding portion is provided on a side of the terminal mount facing away from the battery pack, and the second guiding portion protrudes along an insertion direction of the liquid cooling plug-in member;

[0022] and / or, the second guiding portion is recessed inward along the insertion direction of the liquid cooling plug-in member.

[0023] In this solution, adopting the above structural form, the second guiding portion plays a role of guiding and positioning, improving the connection accuracy of the electrical connector and the stable reliability of the electrical connection of the electrical connector.

[0024] Preferably, the battery pack assembly further includes a plurality of guiding and limiting members, and the plurality of guiding and limiting members are respectively connected to two side walls of the battery pack in the length direction of the battery pack, and the guiding and limiting members are arranged to abut against inner wall surfaces of two side walls of the battery fixing seat in the length direction of the battery fixing seat, so as to clamp the battery pack in the battery fixing seat, and the length direction of the battery fixing seat is the same as the length direction of the battery pack.

[0025] In this solution, adopting the above structural form, effectively reduces the wear between the battery pack and the battery fixing seat, and improves the service life of the battery pack.

[0026] Preferably, the battery pack assembly further includes a plurality of locking shafts, and the plurality of locking shafts are respectively connected to two side walls of the battery pack in the length direction of the battery pack, and the battery pack is detachably connected to the battery fixing seat through the plurality of locking shafts.

[0027] In this solution, adopting the above structural form, the installation and disassembly are convenient, and the structure is simple.

[0028] A battery pack assembly, characterized in that it includes a battery fixing seat and the battery pack assembly as described above, and the battery pack assembly is detachably connected to the battery fixing seat.

[0029] An electric vehicle, characterized in that it includes the battery pack assembly as described above.

[0030] In this solution, adopting the above structural form, by communicating the liquid cooling plug-in member with the heat dissipation system of the electric vehicle, the temperature of the battery pack can be balanced, the full capacity of the battery pack can be improved, and the performance indexes such as the use environment limitation of the battery pack in the electric vehicle, the vehicle power performance, and the battery pack life can be directly improved.

[0031] On the basis of conforming to the common knowledge in the art, the above preferred conditions can be combined arbitrarily to obtain various preferred examples of the present invention.

[0032] The positive and progressive effects of the present invention are as follows:

[0033] The battery pack assembly, battery pack component and electric vehicle of the present invention are connected to the heat dissipation system through a liquid cooling plug, which can balance the temperature of the battery pack, improve the full capacity of the battery pack, and directly improve the performance indicators such as the limited use environment of the battery pack in the electric vehicle, the vehicle power performance, and the battery pack life. At the same time, it is easy to plug in and meet frequent replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic structural diagram of the battery pack component according to Embodiment 1 of the present invention.

[0035] Figure 2 It is a schematic structural diagram of the battery pack assembly of the battery pack component according to Embodiment 1 of the present invention.

[0036] Figure 3 It is a schematic structural diagram of the liquid cooling plug of the battery pack assembly of the battery pack component according to Embodiment 1 of the present invention.

[0037] Figure 4 It is a schematic internal structural diagram of the electrical connector of the battery pack assembly of the battery pack component according to Embodiment 1 of the present invention.

[0038] Figure 5 It is a schematic structural diagram of the battery pack component according to Embodiment 2 of the present invention.

[0039] Figure 6 It is a schematic structural diagram of the battery pack assembly of the battery pack component according to Embodiment 2 of the present invention.

[0040] DESCRIPTION OF THE REFERENCE NUMERALS:

[0041] Battery pack 1

[0042] Liquid cooling plug 2

[0043] Heat dissipation pipe 21

[0044] Mounting plate 22

[0045] First guiding portion 23

[0046] Electrical connector 3

[0047] Pole column mounting seat 31

[0048] Conductive pole column 32

[0049] Limiting portion 321

[0050] Second guiding portion 33

[0051] Guiding and limiting member 4

[0052] Locking shaft 5

[0053] Battery pack assembly 10

[0054] Battery fixing seat 20

[0055] Heat dissipation system 30 Specific implementation manner

[0056] The present invention will be more clearly and completely described below by way of examples in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the examples hereby.

[0057] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0058] Example 1

[0059] As Figure 1 , Figure 2 , Figure 3 and Figure 4 shown, the battery pack assembly of this example includes a battery pack assembly 10 and a battery fixing seat 20. The battery pack assembly 10 is detachably connected to the battery fixing seat 20. The battery pack assembly 10 includes a battery pack 1 and a liquid cooling plug 2. The battery pack 1 is used to be installed in the battery fixing seat 20. The battery pack 1 is detachably connected within the battery fixing seat 20, and the battery pack 1 can move along the length direction of the battery pack 1 within the battery fixing seat 20. The liquid cooling plug 2 is installed on the battery pack 1, and the liquid cooling plug 2 is used to be inserted into an external heat dissipation system 30 and communicate with the heat dissipation system 30. The insertion direction of the liquid cooling plug 2 is the same as the moving direction of the battery pack 1.

[0060] When the battery pack 1 moves along the length direction of the battery pack 1 within the battery fixing seat 20, the insertion direction of the liquid cooling plug 2 is the same as the moving direction of the battery pack 1, so that the liquid cooling plug 2 can move along the direction close to or away from the heat dissipation system 30, and achieve insertion or disconnection with the external heat dissipation system 30. The heat dissipation system 30 can be installed and fixed on the battery fixing seat 20. When the liquid cooling plug 2 communicates with the heat dissipation system 30, the cooling water provided by the external heat dissipation system 30 will enter the battery pack 1 through the liquid cooling plug 2, which can balance the temperature of the battery pack 1, improve the full capacity of the battery pack 1, and directly improve the service life of the battery pack 1. At the same time, it is convenient for plugging and meets the requirement of frequent replacement.

[0061] The liquid cooling plug-in 2 may include at least one heat dissipation pipe 21 disposed within the battery pack 1. Both ends of the heat dissipation pipe 21 are exposed on the outer surface of the battery pack 1 and are used to communicate with the heat dissipation system 30. The heat dissipation pipes 21 distributed within the battery pack 1 can effectively dissipate the heat generated within the battery pack 1, thereby better balancing the temperature of the battery pack 1 and improving the performance and service life of the battery pack 1. At the same time, both ends of the heat dissipation pipe 21 are exposed on the outer surface of the battery pack 1, facilitating the connection of both ends of the heat dissipation pipe 21 to the heat dissipation system 30. Among them, the insertion port at one end of the heat dissipation pipe 21 is used to convey the cooling water provided by the heat dissipation system 30, and the insertion port at the other end of the heat dissipation pipe 21 is used to discharge the cooling water provided by the heat dissipation system 30, enabling the cooling water provided by the external heat dissipation system 30 to achieve circulating cooling of the battery pack 1 through the heat dissipation pipe 21, effectively dissipating the heat of the battery pack 1, and improving the performance and service life of the battery pack 1. Among them, the liquid cooling plug-in 2 includes a mounting plate 22, and the mounting plate 22 is located on the outer surface of the battery pack 1 and is connected to the heat dissipation pipe 21.

[0062] At least one first guiding portion 23 is provided on the side wall of the battery pack 1, and the first guiding portion 23 can extend and protrude along the insertion direction of the liquid cooling plug-in 2. During the insertion process of the battery pack assembly 10 and the heat dissipation system 30, the battery pack 1 moves along the insertion direction of the liquid cooling plug-in 2, such that the first guiding portion 23 is inserted into the battery fixing seat 20. The first guiding portion 23 plays a guiding and positioning role, improving the insertion accuracy between the battery pack assembly 10 and the heat dissipation system 30, greatly enhancing the connection stability of the liquid cooling plug-in 2, and effectively avoiding leakage. Among them, the first guiding portion 23 can be connected to the mounting plate 22. Of course, in this embodiment, the first guiding portion 23 can also be recessed inward along the insertion direction of the liquid cooling plug-in 2.

[0063] The battery pack assembly 10 may further include an electrical connector 3. The electrical connector 3 includes a pole mounting seat 31 and a conductive pole 32. The pole mounting seat 31 is connected to the battery pack 1. The pole mounting seat 31 is provided with a mounting hole, and the conductive pole 32 passes through the mounting hole. At least one limiting portion 321 is provided on the outer wall surface of the conductive pole 32, and the limiting portion 321 is used to limit the inward movement of the conductive pole 32 relative to the pole mounting seat 31 along the axis direction of the mounting hole. The limiting portion 321 abuts against the pole mounting seat 31 and limits the inward movement of the conductive pole 32 in the axis direction within the mounting hole, improving the connection reliability between the conductive pole 32 and the pole mounting seat 31, and further improving the connection reliability of the electrical connector 3.

[0064] The limiting portion 321 can protrude outward along the radial direction of the mounting hole, and the limiting portion 321 abuts against the inner wall surface of the mounting hole. The structure of the protruding limiting portion 321 is not limited. The structure of the limiting portion 321 can be in a ring shape, barbed shape, etc., with a simple structure and convenient processing and manufacturing.

[0065] The axial direction of the mounting hole is the same as the insertion direction of the liquid cooling plug 2. During the insertion process of the liquid cooling plug 2, the limiting portion 321 can effectively limit the movement of the conductive electrode post 32 within the pole mounting seat 31 during the insertion process, effectively avoiding the phenomenon of offset and dislocation of the conductive electrode post 32 during the insertion process, and improving the reliability of electrical connection during the insertion process of the electrical connector 3.

[0066] On the side of the pole mounting seat 31 facing away from the battery pack 1, there is a second guiding portion 33, and the second guiding portion 33 can extend and protrude along the insertion direction of the liquid cooling plug 2. The electrical connector 3 is inserted into the battery fixing seat 20 through the second guiding portion 33 and electrically connected to the connector on the battery fixing seat 20. The second guiding portion 33 plays a role of guiding and positioning, improving the connection accuracy of the electrical connector 3 and the stable reliability of the electrical connection of the electrical connector 3. Of course, the second guiding portion 33 can also be recessed inward along the insertion direction of the liquid cooling plug 2.

[0067] The battery pack assembly 10 can also include a plurality of guiding and limiting members 4. The plurality of guiding and limiting members 4 are respectively connected to the two side walls of the battery pack 1 in the length direction of the battery pack 1, and the guiding and limiting members 4 are arranged to abut against the inner wall surfaces of the two side walls of the battery fixing seat 20 in the length direction of the battery fixing seat 20, so as to clamp the battery pack 1 within the battery fixing seat 20. The length direction of the battery fixing seat 20 is the same as the length direction of the battery pack 1. The guiding and limiting members 4 play a guiding role during the installation process of the battery pack assembly 10. After the battery pack assembly 10 is installed, both sides of the battery pack assembly 10 abut against the inside of the battery fixing seat 20 through the plurality of guiding and limiting members 4, so that both sides of the battery pack assembly 10 have a certain acting force on the battery fixing seat 20 in the width direction, effectively reducing the wear between the battery pack 1 and the battery fixing seat 20 and improving the service life of the battery pack 1.

[0068] The battery pack assembly 10 can also include a plurality of locking shafts 5. The plurality of locking shafts 5 are respectively connected to the two side walls of the battery pack 1 in the length direction of the battery pack 1. The battery pack 1 is detachably connected to the battery fixing seat 20 through the plurality of locking shafts 5. When the liquid cooling plug 2 is inserted into the heat dissipation system 30, the liquid cooling plug 2 will move in the direction close to the heat dissipation system 30, and the battery pack 1 will also move in the insertion direction of the liquid cooling plug 2. The battery pack 1 will drive the plurality of locking shafts 5 to move, and the locking shafts 5 will be inserted into the locking grooves on the inner wall surface of the battery fixing seat 20, so as to realize the connection and fixation between the battery pack assembly 10 and the battery fixing seat 20. On the contrary, the battery pack assembly 10 and the battery fixing seat 20 can be disassembled, so that the battery pack assembly 10 and the battery fixing seat 20 can be detachably connected, which is convenient for installation and disassembly and has a simple structure.

[0069] The present invention also discloses an electric vehicle, which includes the battery pack assembly as described above. The battery pack 1 is used to be installed in the battery fixing seat 20 of the electric vehicle, and the liquid cooling plug 2 is used to be inserted into the heat dissipation system 30 of the electric vehicle and communicate with the heat dissipation system 30. By communicating the liquid cooling plug 2 with the heat dissipation system 30, the temperature of the battery pack 1 can be balanced, the full capacity of the battery pack 1 can be improved, and the performance indicators such as the limited use environment of the battery pack 1, the vehicle power performance, and the service life in the electric vehicle can be directly improved. At the same time, it is convenient for plugging and meets the requirement of frequent replacement.

[0070] Embodiment 2

[0071] As Figure 5 and Figure 6 shown, the same parts of the battery pack assembly in this embodiment as those in Embodiment 1 will not be repeated, and only the differences will be described. In this embodiment, the heat dissipation system 30 is not installed on the battery fixing seat 20. Instead, the heat dissipation system 30 is installed on the chassis of the vehicle. The battery pack 1 is used to be installed in the battery fixing seat 20 of the vehicle, and the battery pack 1 can move along the thickness direction of the battery pack 1 in the battery fixing seat 20. The liquid cooling plug 2 is installed on the top of the battery pack 1. By moving the battery pack 1 upward along the thickness direction of the battery pack 1, the liquid cooling plug 2 is communicated with the heat dissipation system 30; by moving the battery pack 1 downward along the thickness direction of the battery pack 1, the connection between the liquid cooling plug 2 and the heat dissipation system 30 is disconnected.

[0072] Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that this is only for illustration purposes. The protection scope of the present invention is defined by the appended claims. Without departing from the principles and essence of the present invention, those skilled in the art can make various changes or modifications to these embodiments, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A battery pack assembly, characterized in that, It includes: A battery pack, which is used to be installed in a battery fixing seat of an automobile, and the battery pack can move along the length direction and / or the thickness direction of the battery pack in the battery fixing seat; A liquid cooling plug-in, which is installed on the battery pack, and the liquid cooling plug-in is used to be inserted into the heat dissipation system of the automobile and communicate with the heat dissipation system, and the insertion direction of the liquid cooling plug-in is the same as the moving direction of the battery pack; The battery pack assembly further includes a plurality of guiding and limiting members, and the plurality of guiding and limiting members are respectively connected to the two side walls of the battery pack located in the length direction of the battery pack, and the guiding and limiting members are arranged to abut against the inner wall surfaces of the two side walls of the battery fixing seat located in the length direction of the battery fixing seat, so as to clamp the battery pack in the battery fixing seat, and the length direction of the battery fixing seat is the same as the length direction of the battery pack; The battery pack assembly further includes a plurality of locking shafts, and the plurality of locking shafts are respectively connected to the two side walls of the battery pack located in the length direction of the battery pack, and the battery pack is detachably connected to the battery fixing seat through the plurality of locking shafts.

2. The battery pack assembly according to claim 1, wherein, The liquid cooling plug-in includes at least one heat dissipation pipe arranged in the battery pack, and both ends of the heat dissipation pipe are exposed on the outer surface of the battery pack and are used to communicate with the heat dissipation system.

3. The battery pack assembly according to claim 1, wherein, At least one first guiding portion is provided on the side wall of the battery pack, and the first guiding portion extends and protrudes along the insertion direction of the liquid cooling plug-in; And / or, the first guiding portion is recessed inward along the insertion direction of the liquid cooling plug-in.

4. The battery pack assembly according to claim 1, wherein, The battery pack assembly further includes an electrical connector, and the electrical connector includes a pole mounting seat and a conducting electrode post. The pole mounting seat is connected to the battery pack. An installation hole is provided in the pole mounting seat. The conducting electrode post passes through the installation hole. At least one limiting portion is provided on the outer wall surface of the conducting electrode post, and the limiting portion is used to limit the inward movement of the conducting electrode post relative to the pole mounting seat along the axial direction of the installation hole.

5. The battery pack assembly according to claim 4, wherein The axial direction of the installation hole is the same as the insertion direction of the liquid cooling plug-in.

6. The battery pack assembly according to claim 4, wherein The limiting portion protrudes outward along the radial direction of the installation hole, and the limiting portion abuts against the inner wall surface of the installation hole.

7. The battery pack assembly according to claim 4, characterized in that, A second guiding portion is provided on the side of the pole mounting seat facing away from the battery pack, and the second guiding portion extends and protrudes along the insertion direction of the liquid cooling plug-in; And / or, the second guiding portion is recessed inward along the insertion direction of the liquid cooling plug-in.

8. A battery pack assembly, characterized in that, It includes a battery fixing seat and the battery pack assembly according to any one of claims 1-7, and the battery pack assembly is detachably connected to the battery fixing seat.

9. An electric vehicle, characterized in that, It includes the battery pack assembly according to claim 8.

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