WO2025223153A1 - 动力电池包 - Google Patents

动力电池包

Info

Publication number
WO2025223153A1
WO2025223153A1 PCT/CN2025/085906 CN2025085906W WO2025223153A1 WO 2025223153 A1 WO2025223153 A1 WO 2025223153A1 CN 2025085906 W CN2025085906 W CN 2025085906W WO 2025223153 A1 WO2025223153 A1 WO 2025223153A1
Authority
WO
WIPO (PCT)
Prior art keywords
plate portion
liquid cooling
battery pack
side plate
battery cell
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2025/085906
Other languages
English (en)
French (fr)
Inventor
吴洋
杨丹
吴宝
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hefei Gotion High Tech Power Energy Co Ltd
Original Assignee
Hefei Gotion High Tech Power Energy Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hefei Gotion High Tech Power Energy Co Ltd filed Critical Hefei Gotion High Tech Power Energy Co Ltd
Publication of WO2025223153A1 publication Critical patent/WO2025223153A1/zh
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/615—Heating or keeping warm
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/655—Solid structures for heat exchange or heat conduction
    • H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • This application relates to the field of battery pack technology, and more particularly to a power battery pack.
  • Liquid cooling systems are an indispensable functional module in the development of power battery packs.
  • This application provides a power battery pack with strong temperature regulation capability, good fast charging performance, and easy disassembly.
  • This application provides a power battery pack, including:
  • each cell group includes multiple cells, and the cells are arranged sequentially along the plane of the cells, and the cell groups are arranged sequentially along the thickness of the cells;
  • Each liquid cooling plate extends along the extension direction of the battery cell assembly, with each liquid cooling plate corresponding to at least one battery cell assembly.
  • the liquid cooling plate includes a connected side plate and a bottom plate.
  • the side plate is attached to the side surface of the battery cell assembly, and the bottom plate is attached to the bottom end surface of the battery cell assembly.
  • the side plate serves as at least a cooling section, and the bottom plate serves as at least a heating section.
  • the base plate includes a left plate and a right plate, and the side plate is connected between the left plate and the right plate.
  • the two side plates of the side plate are respectively attached to the side surfaces of the two adjacent cell groups, and the left and right plates are respectively attached to the bottom surfaces of the two adjacent cell groups.
  • the side plate is connected to one side of the base plate, one side surface of the side plate is attached to the side surface of a battery cell assembly, and the base plate is attached to the bottom end surface of a battery cell assembly.
  • the interior of the side plate is not connected to the interior of the bottom plate, with the side plate serving as a cooling section and the bottom plate serving as a heating section.
  • a heating element is provided inside the base plate.
  • the heating elements installed in each base plate are electrically connected to an external power source.
  • the interior of the side plate portion is connected to the interior of the bottom plate portion, and the side plate portion and the bottom plate portion together serve as a cooling portion or a heating portion.
  • the side plate is provided with an inlet and an outlet, which are located at opposite ends of the side plate in the extending direction.
  • the power battery pack further includes:
  • the liquid inlet pipe and liquid outlet pipe are respectively located on both sides of the extension direction of each cell group; the liquid inlet of each side plate is connected to the liquid inlet pipe, and the liquid outlet of each side plate is connected to the liquid outlet pipe.
  • both the side plate and the bottom plate are bonded to the battery cell assembly.
  • the power battery pack provided in this application includes multiple cell groups and multiple liquid cooling plates.
  • Each cell group includes multiple cells, which are arranged sequentially along their own planar direction and along the thickness direction of the cells.
  • Each liquid cooling plate extends along the extension direction of the cell group, and each liquid cooling plate corresponds to at least one cell group to cool the cell group.
  • the liquid cooling plate has connected side plates and a bottom plate, with the side plates fitting against the side surfaces of the cell groups and the bottom plates fitting against the bottom surfaces of the cell groups. Furthermore, the side plates serve at least as cooling units to cool the cell groups, and the bottom plates serve at least as heating units to heat the cell groups.
  • the liquid cooling plate can both cool and heat the cell groups, and the large contact area between the side plates and the cell groups results in good cooling performance, enhancing the temperature regulation capability of the power battery pack and improving its fast-charging performance. Furthermore, the battery cells and liquid cooling plates are easy to disassemble, facilitating the maintenance and replacement of the power battery pack.
  • FIG. 1 is a schematic diagram of the power battery pack provided in an embodiment of this application.
  • Figure 2 is an exploded view of the power battery pack in Figure 1;
  • FIG. 3 is a schematic diagram of the battery module assembly provided in an embodiment of this application.
  • FIG. 4 is a schematic diagram of the battery cell module provided in an embodiment of this application.
  • Figure 5 is an exploded view of the battery cell module in Figure 4.
  • FIG. 6 is a schematic diagram of the structure of the liquid cooling plate provided in an embodiment of this application.
  • Figure 7 is an internal cross-sectional view of the liquid cooling plate provided in an embodiment of this application.
  • 10-Power battery pack 10a - Battery cell module assembly; 10b - Battery cell module; 100 - Housing; 200 - Battery cell assembly; 300 - Liquid cooling plate; 400 - Liquid inlet pipe; 500 - Liquid outlet pipe; 110-Main casing; 210-Battery cell; 310-Side plate; 320-Bottom plate; 410-Inlet manifold; 420- Inlet branch pipe; 510 - Outlet main pipe; 520 - Outlet branch pipe; 311-Inlet; 312-Outlet; 313-Disassembly structure; 314-Baffle; 321-Left plate; 322- Right plate part; 3201 - Heating element.
  • power battery packs typically employ bottom liquid cooling to dissipate heat from the battery cells.
  • a liquid cooling plate is placed at the bottom of the battery module (a module formed by packaging multiple battery cells) or unpackaged battery cells to cool the bottom of the cells, thereby dissipating heat from the cells.
  • a power battery pack which includes multiple cell groups and multiple liquid cooling plates.
  • Each cell group includes multiple cells, and the cells in each cell group are arranged sequentially along their own planar direction, and the cell groups are arranged sequentially along the thickness direction of the cells.
  • Each liquid cooling plate extends along the extension direction of the cell group, and each liquid cooling plate corresponds to at least one cell group to cool the cell group.
  • the liquid cooling plate has connected side plates and bottom plates, with the side plates fitting against the side surfaces of the cell groups and the bottom plates fitting against the bottom surfaces of the cell groups. Furthermore, the side plates at least serve as cooling sections for cooling the cell groups, and the bottom plates at least serve as heating sections for heating the cell groups.
  • the liquid cooling plates can both cool and heat the cell groups, and the large contact area between the side plates and the cell groups results in good cooling performance, enhancing the temperature regulation capability of the power battery pack and improving its fast-charging performance. Furthermore, the battery cells and liquid cooling plates are easy to disassemble, facilitating the maintenance and replacement of the power battery pack.
  • Figure 1 is a schematic diagram of the power battery pack provided in an embodiment of this application.
  • Figure 2 is an exploded view of the power battery pack in Figure 1.
  • Figure 3 is a schematic diagram of the cell module assembly provided in an embodiment of this application.
  • this application embodiment provides a power battery pack 10, which can be applied in new energy vehicles, such as pure electric vehicles or hybrid vehicles.
  • the power battery pack 10 can also be applied in other fields such as solar/wind power energy storage systems, power grid/electric power supply systems, base station battery power supplies, and electric robots.
  • the power battery pack 10 includes a housing 100, a number of battery cells 210 and a number of liquid cooling plates 300.
  • the housing 100 is the basic support structure of the power battery pack 10.
  • the number of battery cells 210 and the number of liquid cooling plates 300 are all arranged inside the housing 100 to assemble the power battery pack 10 as a whole.
  • These battery cells 210 are the core components of the power battery pack 10, and are used to charge and discharge the power battery pack 10.
  • the charging process of the battery cell 210 converts electrical energy into chemical energy for energy storage.
  • the discharging process of the battery cell 210 converts chemical energy into electrical energy to provide current to electrical devices.
  • the plurality of battery cells 210 can be respectively attached to the plurality of liquid cooling plates 300, and heat exchange can be carried out between the liquid cooling plates 300 and the battery cells 210.
  • the plurality of liquid cooling plates 300 are used to cool or heat the plurality of battery cells 210 to maintain the battery cells 210 at a suitable operating temperature. In turn, the working performance of the battery cells 210 is guaranteed, and the stability and reliability of the power battery pack 10 are guaranteed.
  • the power battery pack 10 in Figures 1 and 2 only shows a portion of the structure of the housing 100 in order to demonstrate the internal structure of the power battery pack 10.
  • the figures show the main housing 110 of the housing 100.
  • the housing 100 may also include a cover (not shown in the figures), which covers the opening at the top of the main housing 110.
  • the cover and the main housing 110 together form the housing 100.
  • the cover and the main housing 110 together form a sealed receiving cavity, within which the plurality of battery cells 210 and the plurality of liquid cooling plates 300 are disposed.
  • the plurality of battery cells 210 are arranged in a battery cell group 200 within the housing 100.
  • the housing 100 may contain multiple battery cell groups 200 arranged sequentially, each group comprising a plurality of sequentially arranged battery cells 210.
  • Multiple liquid cooling plates 300 are correspondingly disposed to the multiple battery cell groups 200, extending along the extending direction of the battery cell groups 200.
  • Each liquid cooling plate 300 corresponds to at least one battery cell group 200, allowing for cooling or heating of the multiple battery cell groups 200 through the liquid cooling plates 300.
  • Each cell assembly 200 is connected to a corresponding liquid cooling plate 300, and each liquid cooling plate 300 and the cell assembly 200 connected thereto form a whole.
  • the whole module consisting of a liquid cooling plate 300 and the cell assembly 200 connected thereto is defined as cell module 10b.
  • the whole consisting of all cell assemblies 200 and the liquid cooling plates 300, or the whole consisting of the sequentially arranged cell modules 10b, is defined as cell module assembly 10a.
  • each battery cell 210 in the battery cell module assembly 10a can be erected inside the housing 100, or in other words, each battery cell group 200 can be erected inside the housing 100.
  • each battery cell group 200 can be perpendicular to the inner bottom wall of the housing 100.
  • each battery cell 210 can be arranged sequentially along its own planar direction.
  • Each battery cell group 200 can be arranged sequentially along the thickness direction of the battery cell 210.
  • the battery cells 210 By vertically erecting the battery cells 210 within the housing 100 and arranging them in a cell group 200, the battery cells 210 are arranged in an array within the housing 100. This results in a smaller overall space occupied by the battery cells 210 and a higher density of arrangement, which helps to reduce the volume of the power battery pack 10, increase its capacity, and improve its fast-charging performance.
  • each battery cell group 200 when the battery cell 210 is vertically erected inside the housing 100, the arrangement direction of each battery cell group 200 (the X direction in the figure) can correspond to the thickness direction of the battery cell 210, or in other words, each battery cell group 200 is arranged sequentially along the thickness direction of the battery cell 210.
  • each battery cell 210 can be arranged along its own length direction (the Y direction shown in the figure), or in other words, the battery cell group 200 can extend along the length direction of the battery cell 210.
  • the height direction of the battery cell group 200 (the Z direction shown in the figure) is the height direction of a single battery cell 210, and the height direction of the battery cell group 200 can also be considered as the width direction of the battery cell 210.
  • the cell group 200 can maintain a relatively small height. In this way, while ensuring a high cell module 10b with a large arrangement density and a large capacity, the small height of the cell module 10b reduces the height of the power battery pack 10, which is beneficial for making the power battery pack 10 thinner and lighter.
  • the power battery pack 10 may further include an inlet pipe 400 and an outlet pipe 500.
  • Each liquid cooling plate 300 is provided with an inlet 311 and an outlet 312.
  • the inlet 311 and outlet 312 on the liquid cooling plate 300 are both connected to the interior of the liquid cooling plate 300, and the inlet 311 of each liquid cooling plate 300 is connected to the inlet pipe 400, and the outlet 312 of each liquid cooling plate 300 is connected to the outlet pipe 500.
  • Liquid enters the liquid cooling plate 300 from the inlet pipe 400 through the inlet 311 on the liquid cooling plate 300, circulates within the liquid cooling plate 300, and then flows out through the outlet 312 of the liquid cooling plate 300 to the outlet pipe 500, and is finally discharged from the outlet pipe 500.
  • the liquid inlet pipe 400 may include a main liquid inlet pipe 410 and multiple branch liquid inlet pipes 420.
  • Each branch liquid inlet pipe 420 is connected to the main liquid inlet pipe 410 and is connected to the liquid inlet port 311 of each liquid cooling plate 300.
  • Each liquid cooling plate 300 is connected to the main liquid inlet pipe 410 through a corresponding branch liquid inlet pipe 420.
  • the liquid outlet pipe 500 may include a main liquid outlet pipe 510 and multiple branch liquid outlet pipes 520.
  • Each branch liquid outlet pipe 520 is connected to the main liquid outlet pipe 510 and is connected to the liquid outlet port 312 of each liquid cooling plate 300.
  • Each liquid cooling plate 300 is connected to the main liquid outlet pipe 510 through a corresponding branch liquid outlet pipe 520.
  • the liquid inlet pipe 400 has its inlet branch pipes 420 detachably connected to the liquid inlet ports 311 on each liquid cooling plate 300
  • the liquid outlet pipe 500 has its outlet branch pipes 520 detachably connected to the liquid outlet ports 312 on each liquid cooling plate 300.
  • the liquid inlet branch pipes 420 of the liquid inlet pipe 400 can be connected to the liquid inlet ports 311 on each liquid cooling plate 300 via quick connectors
  • the liquid outlet branch pipes 520 of the liquid outlet pipe 500 can be connected to the liquid outlet ports 312 on each liquid cooling plate 300 via quick connectors.
  • liquid inlet pipes 400 and 500 can be quickly and non-destructively disassembled from the liquid cooling plate 300 without disassembling the cell assembly 200 or the liquid cooling plate 300, which facilitates the assembly and disassembly of the power battery pack 10 and reduces the maintenance and replacement costs of the power battery pack 10.
  • Figure 4 is a schematic diagram of the battery cell module provided in an embodiment of this application.
  • Figure 5 is an exploded view of the battery cell module in Figure 4.
  • Figure 6 is a schematic diagram of the liquid cooling plate provided in an embodiment of this application.
  • At least one end of the liquid cooling plate 300 can extend beyond the end of the cell assembly 200 along the extending direction of the cell assembly 200.
  • the portion of the liquid cooling plate 300 (in the extending direction of the cell assembly 200) extending beyond the cell assembly 200 is defined as the protruding end of the liquid cooling plate 300.
  • the liquid inlet 311 and outlet 312 on the liquid cooling plate 300 can be located at the extended end of the liquid cooling plate 300.
  • the extended end of the liquid cooling plate 300 will not be obstructed by the cell assembly 200, leaving sufficient space for the liquid inlet 311 and outlet 312.
  • the extended end of the liquid cooling plate 300 is outside the end of the cell assembly 200 in the extending direction, there is no need to design a protruding portion for the liquid cooling plate 300 to accommodate the liquid inlet 311 and outlet 312 in the height direction of the cell assembly 200. This results in a smaller overall height and a more regular structure for the cell module 10b, simplifying the structural design of the housing 100 and facilitating the miniaturization of the power battery pack 10.
  • the two ends of the liquid cooling plate 300 can extend beyond the two ends of the cell assembly 200 in the extending direction of the cell assembly 200.
  • both ends of the liquid cooling plate 300 in the length direction are extending ends.
  • the liquid inlet 311 can be located at one extending end of the liquid cooling plate 300
  • the liquid outlet 312 can be located at the other extending end of the liquid cooling plate 300.
  • the liquid inlet pipe 400 and the liquid outlet pipe 500 can be respectively located on both sides of the extending direction of each cell assembly 200; in other words, the liquid inlet pipe 400 and the liquid outlet pipe 500 are located on opposite sides of the cell module assembly 10a.
  • the liquid inlet pipe 400 corresponds to and communicates with the liquid inlet 311 of each liquid cooling plate 300
  • the liquid outlet pipe 500 corresponds to and communicates with the liquid outlet 312 of each liquid cooling plate 300.
  • the liquid enters from one end of the liquid cooling plate 300, flows from that end to the other end, and exits from the other end.
  • the liquid flow path design within the liquid cooling plate 300 is reasonable, ensuring the balance of liquid pressure and flow rate.
  • the inlet pipe 400 and outlet pipe 500 are located on opposite sides of the cell module assembly 10a, resulting in a more rational layout and better symmetry within the housing 100, which is beneficial for improving the balance and reliability of the power battery pack 10.
  • the liquid cooling plate 300 may extend beyond the end of the cell assembly 200 at only one end in the extending direction of the cell assembly 200.
  • one end of the liquid cooling plate 300 in the longitudinal direction is the extended end, and both the liquid inlet 311 and the liquid outlet 312 can be located at this end of the liquid cooling plate 300.
  • the liquid inlet pipe 400 and the liquid outlet pipe 500 may be located on the same side in the extending direction of the cell assembly 200; in other words, the liquid inlet pipe 400 and the liquid outlet pipe 500 are located on the same side of the cell module assembly 10a.
  • the liquid cooling plate 300 includes a side plate portion 310 and a bottom plate portion 320, which are connected together.
  • the side plate portion 310 and the bottom plate portion 320 can be an integrally formed structure; in other words, the main structure of the liquid cooling plate 300 can be an integrally formed part.
  • the side plate portion 310 and the bottom plate portion 320 can be formed separately, and the two can be connected by welding, bonding, or locking components such as bolts or screws.
  • the side plate portion 310 of the liquid cooling plate 300 is attached to the side surface of the battery cell assembly 200, which is the surface of the battery cell assembly 200 facing (or away from) the adjacent battery cell assembly 200.
  • the side plate portion 310 of the liquid cooling plate 300 is attached to the surface of the battery cell assembly 200 facing (or away from) the adjacent battery cell assembly 200.
  • the bottom plate portion 320 of the liquid cooling plate 300 can be located between the bottom end face of the battery cell assembly 200 and the inner bottom wall of the housing 100, and the bottom plate portion 320 of the liquid cooling plate 300 is attached to the bottom end face of the battery cell assembly 200.
  • both the side plate portion 310 and the bottom plate portion 320 of the liquid cooling plate 300 can be bonded to the cell assembly 200. That is, the side surface of the cell assembly 200 can be bonded to the side plate portion 310 of the liquid cooling plate 300, and the bottom end face of the cell assembly 200 can be bonded to the bottom plate portion 320 of the liquid cooling plate 300, thereby achieving the connection between the cell assembly 200 and the liquid cooling plate 300, connecting the liquid cooling plate 300 and the corresponding cell assembly 200 together to form the cell module 10b.
  • the side plate portion 310 of the liquid cooling plate 300 serves at least as a cooling portion
  • the bottom plate portion 320 of the liquid cooling plate 300 serves at least as a heating portion.
  • the side plate portion 310 of the liquid cooling plate 300 is used at least to cool each cell 210 in the cell assembly 200 to reduce the temperature of the cell 210.
  • the bottom plate portion 320 of the liquid cooling plate 300 is used at least to heat each cell 210 in the cell assembly 200 to increase the temperature of the cell 210.
  • the battery cell 210 can be cooled by at least the side plate portion 310 of the liquid cooling plate 300 to reduce the temperature of the battery cell 210, enhance the heat dissipation performance of the battery cell 210, and ensure the stability and reliability of the battery cell 210's operating performance.
  • the battery cell 210 can be heated by at least the bottom plate portion 320 of the liquid cooling plate 300 to raise the temperature of the battery cell 210, so that the battery cell 210 operates at a suitable temperature and ensures that the battery cell 210 can achieve fast charging function.
  • each cell 210 in the cell assembly 200 is erected inside the housing 100, the side surface of the cell 210 has the largest surface area. Therefore, by using the side plate portion 310 of the liquid cooling plate 300 as at least a cooling portion, the contact area between the side plate portion 310 of the liquid cooling plate 300 and the side surface of the cell 210 is large, resulting in high heat exchange efficiency and good effect. This can effectively enhance the heat dissipation performance of the cell 210, reduce the temperature of the cell 210, ensure the working performance of the cell 210, and improve the stability and reliability of the fast charging performance of the power battery pack 10.
  • the problems faced by cell 210 under low-temperature conditions are relatively minor, as the required temperature rise for cell 210 under low-temperature conditions is less significant.
  • the heat generated by the bottom plate portion 320 is transferred to the bottom surface of cell 210, thereby raising the temperature of cell 210 and maintaining it at a suitable operating temperature to ensure the fast-charging performance of the power battery pack 10.
  • the heat generated by the heating element acts on the adhesive layer between the battery cell assembly 200 and the liquid cooling plate 300, easily melting the adhesive layer and reducing the bonding force between the battery cell assembly 200 and the liquid cooling plate 300.
  • This facilitates the disassembly of the battery cell assembly 200 and the liquid cooling plate 300. In other words, it facilitates the disassembly of a single battery cell module 10b and the disassembly of the telecommunications module assembly.
  • the adhesive layer between the side surface of the battery cell assembly 200 and the side plate portion 310 of the liquid cooling plate 300 is subjected to shear force.
  • This shear force facilitates the separation of the side surface of the battery cell assembly 200 from the side plate portion 310 of the liquid cooling plate 300. Therefore, when only the bottom plate portion 320 of the liquid cooling plate 300 serves as a heating element, the battery cell assembly 200 can be easily removed from the liquid cooling plate 300.
  • both the bottom plate portion 320 and the side plate portion 310 of the liquid cooling plate 300 serve as heating elements, the battery cell assembly 200 can be removed from the liquid cooling plate 300 even more easily.
  • a disassembly structure 313 can be provided on the liquid cooling plate 300.
  • the disassembly structure 313 is, for example, provided on the side plate portion 310 of the liquid cooling plate 300.
  • the disassembly section is a structure on the liquid cooling plate 300 used for lifting or skidding operations, allowing the liquid cooling plate 300 to be lifted using the disassembly structure 313, thereby separating the liquid cooling plate 300 from the battery cell assembly 200.
  • the disassembly structure 313 can be a disassembly hole provided on the side plate portion 310 of the liquid cooling plate 300, through which lifting or skidding tools can be inserted to apply force to the liquid cooling plate 300.
  • the liquid inlet 311 and the liquid outlet 312 on the liquid cooling plate 300 can be provided on the side plate portion 310, so that coolant can enter through the liquid inlet 311 on the side plate portion 310 and flow out through the liquid outlet 312 on the side plate portion 310.
  • coolant can flow at least within the side plate portion 310 of the liquid cooling plate 300 to realize the function of the side plate portion 310 as a cooling section, and the coolant within the side plate portion 310 carries away the heat of the battery cell 210.
  • the liquid inlet pipe 400 and liquid outlet pipe 500 located on opposite sides of the cell assembly 200 can extend beyond both ends of the cell assembly 200 in the length direction.
  • the liquid inlet 311 and liquid outlet 312 can be respectively provided at the extended ends of both ends of the side plate portion 310.
  • the liquid inlet 311 on the side plate portion 310 of each liquid cooling plate 300 is connected to the liquid inlet pipe 400, and the liquid outlet 312 on the side plate portion 310 of each liquid cooling plate 300 is connected to the liquid outlet pipe 500.
  • a liquid cooling plate 300 can simultaneously cool or heat two adjacent battery cell groups 200.
  • the base plate portion 320 of the liquid cooling plate 300 can be designed with a larger width, and the side plate portion 310 of the liquid cooling plate 300 can be connected to the middle portion of the base plate portion 320.
  • the base plate portion 320 of the liquid cooling plate 300 may include a left plate portion 321 and a right plate portion 322, and the side plate portion 310 can be connected between the left plate portion 321 and the right plate portion 322.
  • the liquid cooling plate 300 can have an inverted "T" shaped structure.
  • the two adjacent cell groups 200 corresponding to the liquid cooling plate 300 are located on both sides of the side plate portion 310 of the liquid cooling plate 300.
  • the two adjacent cell groups 200 are respectively attached to the two side plate surfaces of the side plate portion 310 of the liquid cooling plate 300, specifically, the opposite side surfaces of the two cell groups 200 are respectively attached to the two side plate surfaces of the side plate portion 310.
  • the bottom end surface of one cell group 200 is attached to the left plate portion 321 of the bottom plate portion 320 of the liquid cooling plate 300, and the bottom end surface of the other cell group 200 is attached to the right plate portion 322 of the bottom plate portion 320 of the liquid cooling plate 300.
  • each liquid cooling plate 300 only requires a single side plate 310, resulting in a smaller volume and reducing the space occupied by all liquid cooling plates 300 in the cell module assembly 10a. This, in turn, reduces the overall volume of the cell module assembly 10a, facilitating the miniaturization design of the power battery pack 10.
  • the side plate portion 310 of the liquid cooling plate 300 is sandwiched between two adjacent cell groups 200, for the entire cell module assembly 10a, two cell groups 200 are provided between the side plate portions 310 of two adjacent liquid cooling plates 300 (see Figure 3).
  • the layout of the cell module assembly 10a is more rational, facilitating the connection between the inlet pipe 400 (or outlet pipe 500) and the inlet port 311 (or outlet port 312) on each liquid cooling plate 300.
  • the liquid cooling plate 300 and the battery cell assembly 200 can be arranged in a one-to-one correspondence, with one liquid cooling plate 300 used to cool or heat one battery cell assembly 200.
  • the bottom plate portion 320 of the liquid cooling plate 300 can be designed with a smaller width, which can match the width of the bottom end face of the battery cell assembly 200.
  • the side plate portion 310 of the liquid cooling plate 300 can be connected to one side of the bottom plate portion 320, or in other words, the bottom plate portion 320 of the liquid cooling plate 300 can be connected to one side of the side plate portion 310, and the liquid cooling plate 300 can have a positive (or negative) "L" shaped structure.
  • the cell assembly 200 corresponding to the liquid cooling plate 300 is located on one side of the side plate portion 310 of the liquid cooling plate 300, and the cell assembly 200 is located on the side of the bottom plate portion 320 of the liquid cooling plate 300.
  • the side surface of the cell assembly 200 is attached to the side plate portion 310 of the liquid cooling plate 300, and the bottom end surface of the cell assembly 200 is attached to the bottom plate portion 320 of the liquid cooling plate 300.
  • the liquid cooling plate 300 and the corresponding cell assembly 200 together form the cell module 10b.
  • a liquid cooling plate 300 is used to cool or heat a cell assembly 200. Sufficient heat exchange between the liquid cooling plate 300 and the cell assembly 200 improves the heat exchange efficiency, thereby increasing the heat dissipation (or heating) efficiency of the cell assembly 200 and enhancing its performance. Furthermore, the one-to-one assembly relationship between the liquid cooling plate 300 and the cell assembly 200 facilitates the assembly and disassembly of the cell module 10b, improving its efficiency.
  • FIG 7 is an internal cross-sectional view of the liquid cooling plate provided in an embodiment of this application.
  • the interior of the side plate portion 310 and the interior of the bottom plate portion 320 of the liquid cooling plate 300 may not be connected.
  • the liquid cooling plate 300 forms a liquid cooling cavity only in its side plate portion 310, and the coolant flows only in the side plate portion 310 of the liquid cooling plate 300.
  • a heating element 3201 can be provided in the bottom plate portion 320 of the liquid cooling plate 300. That is, the side plate portion 310 of the liquid cooling plate 300 serves as the cooling section, while the bottom plate portion 320 of the liquid cooling plate 300 serves as the heating section.
  • the side plate portion 310 of the liquid cooling plate 300 may be provided with multiple partitions 314 at intervals along the height direction of the side plate portion 310. This creates multiple small cavities within the side plate portion 310 along its height direction, which are sequentially connected. This prevents the coolant from flowing only through the bottom of the side plate portion 310 due to gravity, allowing the coolant to flow evenly across all areas along the height direction of the side plate portion 310. This ensures effective heat dissipation for the battery cell assembly 200 by the side plate portion 310 of the liquid cooling plate 300, improves the temperature uniformity of the battery cell assembly 200, and guarantees the reliability and stability of the battery cell assembly 200's operation.
  • the power battery pack 10 When the power battery pack 10 is operating normally, it supplies power internally to provide current to the heating elements 3201 installed in the base plate 320 of each liquid cooling plate 300.
  • the current to the heating elements 3201 in the base plate 320 of each liquid cooling plate 300 can be independently controlled to independently control the heating temperature of each liquid cooling plate 300.
  • the heating temperature of each liquid cooling plate 300 can be controlled according to the heat required by each cell module 10b to meet the temperature requirements of each cell module 10b.
  • the cell module 10b When the power battery pack 10 is removed, the cell module 10b is moved out of the housing 100, and the liquid cooling plate 300 separates from the inner bottom wall of the main housing 110. At this time, an external power supply can be used to power each liquid cooling plate 300 so that each liquid cooling plate 300 can normally heat each cell group 200.
  • the heating element 3201 provided in the bottom plate portion 320 of each liquid cooling plate 300 can be electrically connected to an external power supply so that each liquid cooling plate 300 can perform heating independently.
  • the left plate portion 321 and the right plate portion 322 of a single liquid cooling plate 300 can be electrically connected to a common external power supply, and the left plate portion 321 and the right plate portion 322 of a single liquid cooling plate 300 can maintain the same heating temperature.
  • the left plate portion 321 and the right plate portion 322 of a single liquid cooling plate 300 can also be electrically connected to an external power supply separately, allowing for individual control of the heating temperature of the left plate portion 321 and the right plate portion 322 of a single liquid cooling plate 300.
  • the heating element 3201 provided in the bottom plate portion 320 of the liquid cooling plate 300 can be a heating wire or a PTC (positive temperature coefficient) heater.
  • the interior of the side plate portion 310 and the interior of the bottom plate portion 320 of the liquid cooling plate 300 can be interconnected.
  • the side plate portion 310 and the bottom plate portion 320 of the liquid cooling plate 300 together form a liquid cavity, and the liquid can circulate within the side plate portion 310 and the bottom plate portion 320.
  • the side plate portion 310 and the bottom plate portion 320 of the liquid cooling plate 300 can jointly serve as a cooling section or a heating section, utilizing the heat exchange between the liquid and the battery cell assembly 200 to cool or heat the battery cell assembly 200.
  • the side plate portion 310 and the bottom plate portion 320 of the liquid cooling plate 300 simultaneously serve as cooling sections, and a coolant with a lower temperature flows within the liquid cooling plate 300.
  • the side plate portion 310 and the bottom plate portion 320 of the liquid cooling plate 300 simultaneously serve as heating sections, and a heating liquid with a higher temperature flows within the liquid cooling plate 300.
  • coolant can be introduced into the side plate portion 310 of the liquid cooling plate 300 through the inlet 311. After circulating within the side plate portion 310 and the bottom plate portion 320, the coolant flows out through the outlet 312 on the side plate portion 310 to cool the battery cell assembly 200.
  • heating fluid can be introduced into the side plate portion 310 through the inlet 311. After circulating within the side plate portion 310 and the bottom plate portion 320, the heating fluid flows out through the outlet 312 on the side plate portion 310 to heat the battery cell assembly 200.

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Abstract

本申请提供一种动力电池包，涉及电池包技术领域。动力电池包包括：多个电芯组，每个电芯组包括多个电芯、且各电芯沿电芯的平面方向依次排列，各电芯组沿电芯的厚度方向依次排列；多个液冷板，沿电芯组的延伸方向延伸，每个液冷板至少对应一个电芯组；其中，液冷板包括相连的侧板部和底板部，侧板部与电芯组的侧表面贴合，底板部与电芯组的底端面贴合；侧板部至少作为冷却部，底板部至少作为加热部。本申请的动力电池包的温度调节能力强，快充性能好，且拆解方便。

Description

动力电池包
本申请要求于2024年04月23日提交中国专利局、申请号为202410496749.3、申请名称为“动力电池包”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及电池包技术领域，尤其涉及一种动力电池包。
背景技术
在动力电池包的开发过程中，液冷系统是不可或缺的功能模块。
当前，动力电池包对快充性能要求越来越高，采用传统的底部液冷方式，已无法解决快充带来的散热问题。同时，在低温工况下，电芯的充电性能也会受到影响，无法实现快充。另外，随着无模组结构的应用，电芯和箱体之间越来越多的采用粘接方式连接，由此带来的拆解问题也越来越突出。
发明内容
本申请提供一种动力电池包，动力电池包的温度调节能力强，快充性能好，且拆解方便。
本申请提供一种动力电池包，包括：
多个电芯组，每个电芯组包括多个电芯、且各电芯沿电芯的平面方向依次排列，各电芯组沿电芯的厚度方向依次排列；
多个液冷板，沿电芯组的延伸方向延伸，每个液冷板至少对应一个电芯组；
其中，液冷板包括相连的侧板部和底板部，侧板部与电芯组的侧表面贴合，底板部与电芯组的底端面贴合；侧板部至少作为冷却部，底板部至少作为加热部。
在一种可能的实施方式中，底板部包括左板部和右板部，侧板部连接在左板部和右板部之间；
侧板部的两侧板面分别与相邻两个电芯组的侧表面贴合，左板部和右板部分别与相邻两个电芯组的底端面贴合。
在一种可能的实施方式中，侧板部连接在底板部的一侧，侧板部的一侧板面与一个电芯组的侧表面贴合，底板部与一个电芯组的底端面贴合。
在一种可能的实施方式中，侧板部的内部与底板部的内部不连通，侧板部作为冷却部，底板部作为加热部。
在一种可能的实施方式中，底板部内设置有加热件。
在一种可能的实施方式中，当液冷板与动力电池包的箱体分离时，各底板部内设置的加热件分别与外接电源电连接。
在一种可能的实施方式中，侧板部的内部与底板部的内部连通，侧板部和底板部共同作为冷却部或加热部。
在一种可能的实施方式中，侧板部设置有进液口和出液口，进液口和出液口分别位于侧板部的延伸方向的两端。
在一种可能的实施方式中，动力电池包还包括：
进液管和出液管，进液管和出液管分别设置在各电芯组的延伸方向的两侧；各侧板部的进液口均与进液管连通，各侧板部的出液口均与出液管连通。
在一种可能的实施方式中，侧板部及底板部均与电芯组粘接。
本申请提供的动力电池包，动力电池包包括多个电芯组和多个液冷板。每个电芯组包括多个电芯，电芯组中的各电芯沿自身平面方向依次排列，且各电芯组沿电芯的厚度方向依次排列。各液冷板沿电芯组的延伸方向延伸，且每个液冷板至少对应一个电芯组，以通过液冷板对电芯组进行冷却。其中，液冷板通过设置相连的侧板部和底板部，使侧板部与电芯组的侧表面贴合，底板部与电芯组的底端面贴合。并且，侧板部至少作为冷却部对电芯组进行冷却，底板部至少作为加热部对电芯组进行加热。这样，液冷板可以实现对电芯组进行冷却和加热，且液冷板的侧板部与电芯组的接触面积大，对电芯组的冷却效果好，可以增强动力电池包的温度调节能力，提升动力电池包的快充性能。并且，电芯组和液冷板拆解方便，便于动力电池包的维修更换。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作以简单介绍，显而易见地，下面描述中的附图是本申请的一些实施例。对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例提供的动力电池包的结构示意图；
图2为图1中的动力电池包的分解结构图；
图3为本申请实施例提供的电芯模块总成的结构示意图；
图4为本申请实施例提供的电芯模块的结构示意图；
图5为图4中的电芯模块的分解结构图；
图6为本申请实施例提供的液冷板的结构示意图；
图7为本申请实施例提供的液冷板的内部剖视图。
附图标记说明：
10-动力电池包；
10a-电芯模块总成；10b-电芯模块；
100-箱体；200-电芯组；300-液冷板；400-进液管；500-出液管；
110-主壳体；210-电芯；310-侧板部；320-底板部；410-进液总管；420-
进液支管；510-出液总管；520-出液支管；
311-进液口；312-出液口；313-拆解结构；314-隔板；321-左板部；322-
右板部；
3201-加热件。
具体实施方式
正如背景技术中所述，相关技术中，动力电池包通常采用底部液冷的方式，对电芯进行散热。具体的，是在电池模组(多个电芯封装形成的模组)或无封装的电芯的底部设置液冷板，通过对电芯的底部进行冷却，以对电芯进行散热。
然而，随着动力电池包的技术发展及用户的需求提高，动力电池包对快充性能要求越来越高。采用传统的底部液冷方式，对电芯的冷却速度较慢、冷却效果较差，无法满足快充对电芯的散热需求。同时，当动力电池包工作在低温工况下时，电芯的温度较低，会影响电芯的充电性能，导致动力电池包无法实现快充功能。
另外，随着无模组结构(区别于电池模组，各电芯直接安装在箱体内)的应用，电芯和箱体之间越来越多的采用粘接方式连接。相关技术中的液冷方式，也不便于电芯的拆解。
有鉴于此，本申请实施例提供一种动力电池包，动力电池包包括多个电芯组和多个液冷板。每个电芯组包括多个电芯，电芯组中的各电芯沿自身平面方向依次排列，且各电芯组沿电芯的厚度方向依次排列。各液冷板沿电芯组的延伸方向延伸，且每个液冷板至少对应一个电芯组，以通过液冷板对电芯组进行冷却。其中，液冷板通过设置相连的侧板部和底板部，使侧板部与电芯组的侧表面贴合，底板部与电芯组的底端面贴合。并且，侧板部至少作为冷却部对电芯组进行冷却，底板部至少作为加热部对电芯组进行加热。这样，液冷板可以实现对电芯组进行冷却和加热，且液冷板的侧板部与电芯组的接触面积大，对电芯组的冷却效果好，可以增强动力电池包的温度调节能力，提升动力电池包的快充性能。并且，电芯组和液冷板拆解方便，便于动力电池包的维修更换。
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
图1为本申请实施例提供的动力电池包的结构示意图。图2为图1中的动力电池包的分解结构图。图3为本申请实施例提供的电芯模块总成的结构示意图。
参照图1和图2所示，本申请实施例提供一种动力电池包10，动力电池包10可以应用在新能源汽车中，例如，动力电池包10应用在纯电动汽车或混动汽车中。或者，动力电池包10也可以应用在太阳能/风能电能储能系统、电网/电力电源系统、基站电池电源、电动机器人等其他领域中。
具体的，动力电池包10包括箱体100、若干电芯210及多个液冷板300，箱体100为动力电池包10的基础支撑结构，该若干电芯210和该多个液冷板300均设置在箱体100内，以组装成为动力电池包10整体。
该若干电芯210为动力电池包10的核心部件，电芯210用于实现动力电池包10的充放电。电芯210的充电过程是将电能转化为化学能，以将能量进行储存。电芯210的放电过程是将化学能转化为电能，以向用电设备提供电流。
该若干电芯210可以分别与该多个液冷板300贴合，液冷板300可以和电芯210之间进行热交换。该多个液冷板300用于对该若干电芯210进行冷却或加热，以将电芯210维持在适宜的工作温度下。进而，保证电芯210的工作性能，保证动力电池包10的稳定性和可靠性。
可以理解的是，图1和图2中的动力电池包10，为了展示动力电池包10的内部结构，而仅示出了箱体100的部分结构。例如，图中示出了箱体100的主壳体110，箱体100还可以包括箱盖(图中未示出)，箱盖盖设在主壳体110顶部的开口上，箱盖与主壳体110共同组成箱体100。箱盖和主壳体110共同围成密封的容纳腔，该若干电芯210及该多个液冷板300设置在容纳腔内。
参照图2或图3所示，该若干电芯210以电芯组200的方式排列在箱体100内。或者说，箱体100内可以设置有多个电芯组200，该多个电芯组200依次排列，每个电芯组200包括依次排列的多个电芯210。该多个液冷板300与该多个电芯组200对应设置，液冷板300可以沿电芯组200的延伸方向延伸，每个液冷板300至少对应一个电芯组200，以通过该多个液冷板300对该多个电芯组200进行冷却或加热。
各电芯组200与对应的液冷板300相连接，每个液冷板300和与之连接的电芯组200连接形成整体。为便于说明，本实施例将一个液冷板300和与之连接的电芯组200构成的整体模块，定义为电芯模块10b。将所有电芯组200和所述液冷板300组成的整体，或者说，将依次排列的各电芯模块10b组成的整体，定义为电芯模块总成10a。
其中，电芯模块总成10a中的各电芯210可以立设在箱体100内，或者说，各电芯组200可以立设在箱体100内。例如，各电芯组200可以垂直于箱体100的内底壁。每个电芯组200中，各电芯210可以沿电芯210自身的平面方向依次排列。各电芯组200可以沿电芯210自身的厚度方向依次排列。
通过将电芯210垂直立设在箱体100内，且将该若干电芯210以电芯组200的方式排列，该若干电芯210呈阵列式架构排列在箱体100内。这样，该若干电芯210整体占据的空间较小，且该若干电芯210的排布密度较大，有利于减小动力电池包10的体积，增大动力电池包10的容量，提升动力电池包10的快充性能。
示例性的，参照图3所示，当电芯210垂直立设在箱体100内时，各电芯组200的排列方向(图中的X方向)可以对应电芯210的厚度方向，或者说，各电芯组200沿电芯210的厚度方向依次排列。每个电芯组200中，各电芯210可以沿自身的长度方向(图中所示的Y方向)排列，或者说，电芯组200可以沿着电芯210的长度方向延伸。电芯组200的高度方向(图中所示的Z方向)即为单个电芯210的高度方向，电芯组200的高度方向也可以认为是电芯210的宽度方向。
通过将每个电芯组200中的各电芯210沿电芯210自身的长度方向排布，电芯组200的高度方向对应电芯210的宽度方向，可以使电芯组200维持较小高度。这样，在保证电芯模块10b具有较大排布密度、电芯模块10b的容量较大的基础上，电芯模块10b的高度较小，可降低动力电池包10的高度，有利于动力电池包10的轻薄化。
参照图2所示，动力电池包10还可以包括进液管400和出液管500，各液冷板300上均设置有进液口311和出液口312。液冷板300上的进液口311和出液口312均与液冷板300的内部连通，且各液冷板300的进液口311均与进液管400连通，各液冷板300的出液口312均与出液管500连通。液体从进液管400经液冷板300上的进液口311进入液冷板300内，在液冷板300内循环后，再经液冷板300的出液口312流出至出液管500，最终由出液管500排出。
示例性的，进液管400可以包括进液总管410和多个进液支管420，各进液支管420均连接在进液总管410上，各进液支管420与各液冷板300的进液口311连通，各液冷板300通过对应进液支管420与进液总管410连通。与进液管400类似的，出液管500可以包括出液总管510和多个出液支管520，各出液支管520均连接在出液总管510上，各出液支管520与各液冷板300的出液口312连通，各液冷板300通过对应出液支管520与出液总管510连通。
其中，进液管400的各进液支管420与各液冷板300上的进液口311可拆卸连接，出液管500的各出液支管520与液冷板300上的出液口312可拆卸连接。例如，进液管400的各进液支管420与各液冷板300上的进液口311通过快速接头连接，出液管500的各出液支管520与各液冷板300上的出液口312通过快速接头连接。这样，可以在不拆解电芯组200或液冷板300的情况下，实现进液管400及出液管500与液冷板300的快速、无损拆解，便于动力电池包10的组装与拆卸，降低动力电池包10的维修更换成本。
图4为本申请实施例提供的电芯模块的结构示意图。图5为图4中的电芯模块的分解结构图。图6为本申请实施例提供的液冷板的结构示意图。
参照图4和图5所示，对于单个电芯模块10b而言，为了便于液冷板300与进液管400和出液管500连接，沿电芯组200的延伸方向，液冷板300的至少一端可以伸出电芯组200的端部之外。为便于说明，本实施例将液冷板300(在电芯组200的延伸方向上)伸出至电芯组200之外的部分，定义为液冷板300的伸出端。
液冷板300上的进液口311和出液口312，可以设置在液冷板300的伸出端。液冷板300的伸出端不会被电芯组200遮挡，可以留出足够的空间来设置进液口311和出液口312。并且，由于液冷板300的伸出端在电芯组200的延伸方向的端部之外，在电芯组200的高度方向上，无需为液冷板300设计凸出部分来设置进液口311和出液口312。这样，电芯模块10b的整体高度较小，且结构更加规则，可以使箱体100的结构设计更加简单，有利于动力电池包10的小型化。
结合图4和图5所示，在一些示例中，在电芯组200的延伸方向上，液冷板300的两端可以分别伸出电芯组200的两端之外。此时，液冷板300的长度方向的两端均为伸出端，可以将进液口311设置在液冷板300的一端伸出端，将出液口312设置在液冷板300的另一端伸出端。与之相应的，可以将进液管400和出液管500分别设置在各电芯组200的延伸方向的两侧，换言之，进液管400和出液管500分别位于电芯模块总成10a的相对两侧。进液管400与各液冷板300的进液口311对应并连通，出液管500与各液冷板300的出液口312对应并连通。
如此设置，液体由液冷板300的一端进入，由液冷板300的该端流动至液冷板300的另一端，并从液冷板300的另一端流出。液冷板300内的液体流路设计合理，可保证液体的压力和流速的均衡性。并且，进液管400和出液管500分别位于电芯模块总成10a的相对两侧，箱体100内的布局更加合理，对称性更好，有利于提升动力电池包10的平衡性和可靠性。
当然，在另一些示例中，在电芯组200的延伸方向上，液冷板300可以仅有一端伸出至电芯组200的端部之外。此时，液冷板300的长度方向的一端为伸出端，进液口311和出液口312均可以设置在液冷板300的该端。与之相应的，进液管400和出液管500可以位于电芯组200的延伸方向的同一侧，换言之，进液管400和出液管500位于电芯模块总成10a的同一侧。
参照图5和图6所示，本实施例中，液冷板300包括侧板部310和底板部320，侧板部310和底板部320相连接。示例性的，侧板部310和底板部320可以为一体成型结构，换言之，液冷板300的主体结构可以为一体成型件。或者，侧板部310和底板部320可以分别单独成型，且两者通过焊接、粘接或螺栓、螺钉等锁紧件连接。
其中，液冷板300的侧板部310与电芯组200的侧表面贴合，电芯组200的侧表面即为电芯组200面向(或背向)相邻电芯组200的表面。换言之，液冷板300的侧板部310与电芯组200朝向(或背向)相邻电芯组200的表面贴合。液冷板300的底板部320可以位于电芯组200的底端面与箱体100的内底壁之间，且液冷板300的底板部320与电芯组200的底端面贴合。
至于液冷板300与电芯组200的连接，液冷板300的侧板部310及底板部320均可以与电芯组200粘接。也就是说，电芯组200的侧表面可以与液冷板300的侧板部310粘接，电芯组200的底端面可以与液冷板300的底板部320粘接，以实现电芯组200与液冷板300的连接，将液冷板300和与之对应的电芯组200连接在一起，共同组成电芯模块10b。
本实施例中，液冷板300的侧板部310至少作为冷却部，液冷板300的底板部320至少作为加热部。换言之，液冷板300的侧板部310至少用于冷却电芯组200中的各电芯210，以降低电芯210的温度。液冷板300的底板部320至少用于加热电芯组200中的各电芯210，以升高电芯210的温度。
在动力电池包10的工作过程中，当电芯210的功率较高、发热量较大时，可以至少利用液冷板300的侧板部310对电芯210进行冷却，以降低电芯210的温度，增强电芯210的散热性能，保证电芯210工作性能的稳定性和可靠性。当电芯210工作在低温工况下时，可以至少利用液冷板300的底板部320队电芯210进行加热，以升高电芯210的温度，使电芯210工作在适宜温度下，确保电芯210可实现快充功能。
由于电芯组200中的各电芯210均立设在箱体100内，电芯210的侧表面为其表面积最大的表面。因而，通过将液冷板300的侧板部310至少作为冷却部，液冷板300的侧板部310与电芯210的侧表面之间的接触面积大，热交换效率高、效果好，可以有效增强电芯210的散热性能，降低电芯210的温度，保证电芯210的工作性能，提升动力电池包10的快充性能的稳定性和可靠性。
而相较于电芯210的温度过高带来的严峻考验，电芯210在低温工况下面临的问题较为轻微，电芯210在低温工况下时对温度升高幅度的要求较小。对此，通过将液冷板300的底板部320至少作为加热部，液冷板300的底板部320产生的热量由电芯210的底端面传递给电芯210，以升高电芯210的温度，使电芯210维持在适宜工作温度下，保证动力电池包10的快充性能。
另外，当电芯组200采用粘接方式与液冷板300连接时，通过将液冷板300的底板部320至少作为加热部，加热部产生的热量作用于电芯组200与液冷板300之间的胶层，容易使胶层熔化，减小电芯组200与液冷板300之间的粘结力。从而，易于电芯组200与液冷板300之间的拆解。或者说，便于单个电芯模块10b的拆解，便于电信模块总成的拆解。
其中，分离电芯组200的侧表面从液冷板300的侧板部310分离时，电芯组200的侧表面与液冷板300的侧板部310之间的胶层受到剪切力，剪切力的作用使得电芯组200的侧表面容易与液冷板300的侧板部310分离。因此，当液冷板300仅有底板部320作为加热部时，电芯组200也能较容易地从液冷板300上拆解下来。当然，若液冷板300的底板部320和侧板部310同时作为加热部，则电芯组200可更轻松地从液冷板300上拆解下来。
另外，为了便于液冷板300和电芯组200的分离，参照图5或图6，液冷板300上还可以预留有拆解结构313，拆解结构313例如设置在液冷板300的侧板部310上。拆解部为液冷板300上用于供吊装操作或撬装操作的结构，以利用拆解结构313提拉液冷板300，实现液冷板300与电芯组200的分离。例如，拆解结构313可以为液冷板300的侧板部310上设置的拆解孔，吊装工具或撬装工具可以穿设在拆解孔内，以对液冷板300施加作用力。
继续参照图5或图6，由于液冷板300的侧板部310至少作为冷却部，因此，液冷板300上的进液口311和出液口312可以设置在侧板部310上，以使冷却液可由侧板部310上的进液口311进入，并从侧板部310上的出液口312流出。这样，冷却液至少可在液冷板300的侧板部310内流动，以实现侧板部310作为冷却部的功能，通过侧板部310内的冷却液带走电芯210的热量。
以进液管400和出液管500分别位于电芯组200的相对两侧为例，液冷板300中至少侧板部310的长度方向的两端可以伸出至电芯组200的两端之外，进液口311和出液口312可以分别设置在侧板部310两端的伸出端。各液冷板300的侧板部310上的进液口311均与进液管400连通，各液冷板300的侧板部310上的出液口312均与出液管500连通。
参照图6所示，在一些实施方式中，一个液冷板300可以实现同时对相邻两个电芯组200冷却或加热。对此，可以对液冷板300的底板部320设计较大的宽度，液冷板300的侧板部310可以连接在底板部320的中间部位。具体的，液冷板300的底板部320可以包括左板部321和右板部322，侧板部310可以连接在左板部321和右板部322之间，液冷板300可以呈倒“T”型结构。
此时，与液冷板300对应的相邻两个电芯组200，分别位于液冷板300的侧板部310的两侧，该相邻两个电芯组200分别与液冷板300的侧板部310的两侧板面贴合，具体是该两个电芯组200相对的侧表面分别贴合在侧板部310的两侧板面。同时，该相邻两个电芯组200中，一个电芯组200的底端面贴合在液冷板300底板部320中的左板部321上，另一电芯组200的底端面贴合在液冷板300底板部320中的右板部322上。
通过一个液冷板300同时对相邻两个电芯组200冷却或加热，提高了液冷板300的利用率，可以减少电芯模块总成10a中设置的液冷板300的数量，降低电芯模块总成10a的生产成本。并且，单个液冷板300仅需设计一个侧板部310，液冷板300的体积较小，可以减小电芯模块总成10a中所有液冷板300占据的空间。进而，减小电芯模块总成10a的体积，有利于动力电池包10的小型化设计。
另外，由于液冷板300的侧板部310夹设在相邻两个电芯组200之间，对于整个电芯模块总成10a而言，相邻两个液冷板300的侧板部310之间设有两个电芯组200(参见图3所示)。这样，每相邻两个液冷板300的侧板部310的伸出端之间的空间较大，便于将进液管400(或出液管500)的进液支管420(或出液支管520)容置在该空间内。从而，电芯模块总成10a的布局更合理，便于进液管400(或出液管500)与各液冷板300上的进液口311(或出液口312)的连接。
在另一些实施方式中，液冷板300与电芯组200可以一一对应设置，一个液冷板300用于为一个电芯组200冷却或加热。对此，可以对液冷板300的底板部320设计较小的宽度，底板部320的宽度可以与电芯组200的底端面的宽度相匹配。具体的，液冷板300的侧板部310可以连接在底板部320的一侧，或者说，液冷板300的底板部320连接在侧板部310的单侧，液冷板300可以呈正(或反)“L”型结构。
此时，与液冷板300对应的电芯组200，位于液冷板300的侧板部310的一侧，且该电芯组200位于液冷板300的底板部320所在的一侧。电芯组200的侧表面贴合在液冷板300的侧板部310上，电芯组200的底端面贴合在液冷板300的底板部320上，液冷板300和对应的电芯组200共同组成电芯模块10b。
通过一个液冷板300为一个电芯组200冷却或加热，液冷板300与电芯组200之间充分热交换，可以提升液冷板300与电芯组200之间的热交换效率，提高电芯组200的散热效率(或加热效率)，提升电芯组200的工作性能。并且，由于液冷板300与电芯组200为一对一的组装关系，便于电芯模块10b的组装与拆卸，可以提升电芯模块10b的装拆效率。
图7为本申请实施例提供的液冷板的内部剖视图。参照图7所示，至于液冷板300的加热部的设计方式，作为一种实施方式，液冷板300的侧板部310的内部和底板部320的内部可以不连通。此时，液冷板300仅在其侧板部310内形成液冷腔，冷却液仅在液冷板300的侧板部310内流动。而液冷板300的底板部320内则可以设置加热件3201。也就是说，液冷板300的侧板部310作为冷却部，而液冷板300的底板部320则作为加热部。
其中，液冷板300的侧板部310的内部可以间隔设置有多个隔板314，该多个隔板314可以沿侧板部310的高度方向间隔设置。此时，沿液冷板300的侧板部310的高度方向，侧板部310内分隔出多个小腔体，该多个小腔体可以依次连通。这样，可以防止冷却液受重力影响而仅流过侧板部310的底部，可以使冷却液均匀的流过侧板部310高度方向的各区域。以保证液冷板300的侧板部310对电芯组200的散热效果，提高电芯组200的温度均匀性，保证电芯组200工作的可靠性和稳定性。
当动力电池包10正常工作时，动力电池包10内部正常供电，以为各液冷板300底板部320内设置的加热件3201提供电流。示例性的，可以对各液冷板300底板部320的加热件3201的电流进行独立控制，以独立控制各液冷板300的加热温度。进而，可以根据各电芯模块10b所需的热量，控制各液冷板300的加热温度，以满足各电芯模块10b的温度需求。
当拆除动力电池包10时，电芯模块10b从箱体100内移出，液冷板300与主壳体110的内底壁分离。此时，可以通过外接电源，为各液冷板300供电，以使各液冷板300可以正常为各电芯组200加热。示例性的，各液冷板300底板部320内设置的加热件3201可以分别与外接电源电连接，以使各液冷板300独立进行加热工作。
继续参照图7，当液冷板300的侧板部310连接在底板部320中间、底板部320包括左板部321和右板部322时，左板部321和右板部322内可以分别设置有加热件3201。其中，当液冷板300与箱体100分离时，单个液冷板300的左板部321和右板部322可以共同电连接一个外接电源，单个液冷板300的左板部321和右板部322可以保持相同加热温度。或者，单个液冷板300的左板部321和右板部322也可以分别与外接电源电连接，可以实现对单个液冷板300的左板部321和右板部322的加热温度进行单独控制。
示例性的，液冷板300的底板部320内设置的加热件3201可以为加热丝或PTC(positive temperature coefficient，正温度系数)加热器。
作为另一种实施方式，液冷板300的侧板部310的内部和底板部320的内部可以相互连通。此时，液冷板300的侧板部310和底板部320共同形成一个液体腔，液体可在侧板部310和底板部320内循环流动。换言之，液冷板300的侧板部310和底板部320可以共同作为冷却部或加热部，利用液体与电芯组200的热交换，对电芯组200进行冷却或加热。
当需要对电芯组200进行冷却时，液冷板300的侧板部310和底板部320同时作为冷却部，液冷板300内流动的是温度较低的冷却液。当需要对电芯组200进行加热时，液冷板300的侧板部310和底板部320同时作为加热部，液冷板300内流动的是温度较高的加热液。
具体的，当需要对电芯组200进行冷却时，可以利用液冷板300的侧板部310上的进液口311，向侧板部310内送入冷却液，冷却液在侧板部310和底板部320内流动循环后，再从侧板部310上的出液口312流出，以对电芯组200进行冷却。当需要对电芯组200进行加热时，可以利用液冷板300的侧板部310上的进液口311，向侧板部310内送入加热液，加热液在侧板部310和底板部320内流动循环后，再从侧板部310上的出液口312流出，以对电芯组200进行加热。
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。
最后应说明的是：以上各实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述各实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的范围。

Claims (10)

  1. 一种动力电池包，其特征在于，包括：
    多个电芯组，每个所述电芯组包括多个电芯、且各所述电芯沿所述电芯的平面方向依次排列，各所述电芯组沿所述电芯的厚度方向依次排列；
    多个液冷板，沿所述电芯组的延伸方向延伸，每个所述液冷板至少对应一个所述电芯组；
    其中，所述液冷板包括相连的侧板部和底板部，所述侧板部与所述电芯组的侧表面贴合，所述底板部与所述电芯组的底端面贴合；所述侧板部至少作为冷却部，所述底板部至少作为加热部。
  2. 根据权利要求1所述的动力电池包，其特征在于，所述底板部包括左板部和右板部，所述侧板部连接在所述左板部和所述右板部之间；
    所述侧板部的两侧板面分别与相邻两个所述电芯组的侧表面贴合，所述左板部和所述右板部分别与相邻两个所述电芯组的底端面贴合。
  3. 根据权利要求1所述的动力电池包，其特征在于，所述侧板部连接在所述底板部的一侧，所述侧板部的一侧板面与一个所述电芯组的侧表面贴合，所述底板部与一个所述电芯组的底端面贴合。
  4. 根据权利要求1-3任一项所述的动力电池包，其特征在于，所述侧板部的内部与所述底板部的内部不连通，所述侧板部作为所述冷却部，所述底板部作为所述加热部。
  5. 根据权利要求4所述的动力电池包，其特征在于，所述底板部内设置有加热件。
  6. 根据权利要求5所述的动力电池包，其特征在于，当所述液冷板与所述动力电池包的箱体分离时，各所述底板部内设置的所述加热件分别与外接电源电连接。
  7. 根据权利要求1-3任一项所述的动力电池包，其特征在于，所述侧板部的内部与所述底板部的内部连通，所述侧板部和所述底板部共同作为所述冷却部或所述加热部。
  8. 根据权利要求1-3任一项所述的动力电池包，其特征在于，所述侧板部设置有进液口和出液口，所述进液口和所述出液口分别位于所述侧板部的延伸方向的两端。
  9. 根据权利要求8所述的动力电池包，其特征在于，还包括：
    进液管和出液管，所述进液管和所述出液管分别设置在各所述电芯组的延伸方向的两侧；各所述侧板部的所述进液口均与所述进液管连通，各所述侧板部的所述出液口均与所述出液管连通。
  10. 根据权利要求1-3任一项所述的动力电池包，其特征在于，所述侧板部及所述底板部均与所述电芯组粘接。
PCT/CN2025/085906 2024-04-23 2025-03-28 动力电池包 Pending WO2025223153A1 (zh)

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CN208208922U (zh) * 2017-12-29 2018-12-07 开沃新能源汽车集团有限公司 一种可对动力电池冷却和加热的装置
CN217589135U (zh) * 2022-05-30 2022-10-14 广州智源动力科技有限责任公司 动力电池模组及电池温控系统
CN219223074U (zh) * 2023-04-04 2023-06-20 国兴(东莞)新能源科技有限公司 带换热功能的电池载具
CN116487772A (zh) * 2023-06-21 2023-07-25 厦门海辰储能科技股份有限公司 一种液冷板和电池模组
CN118472463A (zh) * 2024-04-23 2024-08-09 合肥国轩高科动力能源有限公司 动力电池包

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CN208208922U (zh) * 2017-12-29 2018-12-07 开沃新能源汽车集团有限公司 一种可对动力电池冷却和加热的装置
CN217589135U (zh) * 2022-05-30 2022-10-14 广州智源动力科技有限责任公司 动力电池模组及电池温控系统
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