Battery pack and battery system

Abstract

The application provides a battery box assembly, a battery pack and a battery system, the battery box assembly is used for accommodating an electric core stack, and the battery box assembly comprises a box, a fixing beam assembly and a heat exchange plate assembly, wherein the fixing beam assembly and the heat exchange plate assembly are connected with the box and jointly enclose a plurality of subspaces for accommodating at least one group of electric core groups; the heat exchange plate assembly is provided with a heat exchange channel structure, and the fixing beam assembly is provided with a transmission channel structure, the transmission channel structure has a first connecting outlet and a first connecting inlet which respectively communicate with an inlet and an outlet of the heat exchange channel structure, and a total inlet and a total outlet which are used for respectively communicating with an outlet and an inlet of a fluid supply source. The embodiment of the application not only solves the problem that the battery system in the prior art has a large temperature difference, but also can realize integration of the box and the heat transfer structure, improve space utilization, and save material and process costs.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and more specifically, to a battery housing assembly, a battery pack, and a battery system. Background Technology

[0002] The space utilization rate of a battery system is crucial to its volumetric energy density, and how to efficiently utilize the internal space of the system has become a challenge in the structural design of battery systems. Traditional heat transfer components consist of water pipes, water nozzles, flow channels, and heat transfer plates. The heat transfer system has too many components, occupying a large amount of internal space.

[0003] Specifically, traditional heat transfer designs typically involve multiple water pipes arranged within the battery system, connected to heat transfer plates placed on the sides of the cell modules via adapters and water pipes to form a heat transfer loop. However, this heat transfer structure requires additional heat transfer components (such as water pipes, adapters, and flow channels), resulting in low space utilization, high material and process costs, and a significant risk of leakage. Another heat transfer design places a single heat transfer plate at the bottom of the housing for bottom surface heat dissipation. However, due to the overly simplistic heat dissipation surface distribution, the heat dissipation efficiency is limited, and it creates a large internal temperature difference, resulting in a cold bottom and a hot top in the battery system. Summary of the Invention

[0004] This invention aims to solve at least one of the technical problems existing in the prior art, and proposes a battery housing assembly, battery pack and battery system, which can not only improve the uniformity of temperature distribution and solve the problem of large temperature difference in the battery system in the prior art, but also eliminate the need for additional heat transfer components (such as water pipes, adapters, flow channels, etc.) in the heat transfer design of traditional battery systems. This can realize the integration of the housing and heat transfer structure, improve space utilization and save material and process costs.

[0005] To achieve the above objectives, this disclosure provides a battery housing assembly for accommodating a battery cell stack, the battery cell stack comprising multiple battery cell groups, each battery cell group being composed of multiple stacked battery cells; the battery housing assembly includes: a housing, a fixing beam assembly, and a heat exchange plate assembly, wherein the fixing beam assembly and the heat exchange plate assembly are both connected to the housing and together form multiple sub-spaces for accommodating at least one battery cell group;

[0006] The heat exchange plate assembly is provided with a heat exchange channel structure, and the fixed beam assembly is provided with a transmission channel structure. The transmission channel structure has a first connecting outlet and a first connecting inlet that are respectively connected to the inlet and outlet of the heat exchange channel structure, and a total inlet and a total outlet that are respectively connected to the outlet and inlet of the fluid supply source.

[0007] Optionally, the fixing beam assembly includes a first fixing beam, a second fixing beam, a third fixing beam, and a fourth fixing beam, wherein the first fixing beam and the second fixing beam both extend in a first direction and are opposite to each other in a second direction; the first direction and the second direction are perpendicular to each other and both are parallel to the plane of the housing used to place the battery cell assembly;

[0008] The third fixed beam and the fourth fixed beam are both located between the first fixed beam and the second fixed beam, and are both connected to both of them; the third fixed beam and the fourth fixed beam extend in the second direction and are opposite to each other in the first direction.

[0009] Optionally, the heat exchange plate assembly includes a plurality of first heat exchange plates, all of which are located between the first fixed beam and the second fixed beam and are connected to both; the plurality of first heat exchange plates extend in the second direction and are spaced apart in the first direction.

[0010] Each pair of adjacent first heat exchange plates, together with the first fixed beam and the second fixed beam, forms the subspace.

[0011] Optionally, the heat exchange channel structure includes a heat exchange channel disposed in each of the first heat exchange plates;

[0012] The transmission channel structure includes mutually isolated inflow and outflow channels disposed in each of the first and second fixed beams, and a total inflow and total outflow channel respectively disposed in the third and fourth fixed beams; wherein,

[0013] Each of the inflow channels has a first transmission inlet and multiple first connection outlets. The first transmission inlet is connected to the outlet of the total inflow channel. The multiple first connection outlets are connected one-to-one with the inlets of the heat exchange channels in the multiple first heat exchange plates. The inlet of the total inflow channel is the total inlet.

[0014] Each of the outflow channels has a first transmission outlet and multiple first connection inlets, the first transmission outlet being connected to the inlet of the total outflow channel; the multiple first connection inlets being connected one-to-one with the outlets of the heat exchange channels in the multiple first heat exchange plates; the outlet of the total outflow channel is the total outlet.

[0015] Optionally, the inlet and outlet of the heat exchange channel are at different heights in a third direction; the third direction is perpendicular to the plane of the housing used to house the battery pack.

[0016] The inflow channel and the outflow channel disposed in each of the first fixed beam and the second fixed beam are arranged at intervals in the third direction, the first connecting outlet of the inflow channel is connected to the inlet of the corresponding heat exchange channel at the same height; the first connecting inlet of the outflow channel is connected to the outlet of the corresponding heat exchange channel at the same height.

[0017] The total inflow channel and the total outflow channel are at different heights in the third direction, and the total inlet is connected to the first transmission outlet at the same height; the total outlet is connected to the first transmission inlet at the same height.

[0018] Optionally, in each of two adjacent first heat exchange plates, the inlet and outlet of the heat exchange channel in one of the first heat exchange plates are located on different sides from the inlet and outlet of the heat exchange channel in the other first heat exchange plate.

[0019] Optionally, a first gap is provided in each of the first fixed beam and the second fixed beam, located between the inflow channel and the outflow channel.

[0020] Optionally, the inflow channel and the outflow channel provided in each of the first fixed beam and the second fixed beam are both straight channels that pass through the fixed beam; the first gap is a straight hole that passes through the fixed beam.

[0021] Optionally, both the third fixed beam and the fourth fixed beam are provided with a second gap, wherein the second gap in the third fixed beam and the total inflow channel are spaced apart in the third direction; and the second gap in the fourth fixed beam and the total outflow channel are spaced apart in the third direction.

[0022] The arrangement order of the second isolation section and the main inflow channel in the third direction is the opposite of the arrangement order of the second isolation section and the main outflow channel in the third direction.

[0023] Optionally, the main inflow channel and the main outflow channel are both straight channels that pass through the third fixed beam and the fourth fixed beam, respectively; the second gap is a straight through hole that passes through the third fixed beam or the fourth fixed beam in which it is located.

[0024] Optionally, the third fixing beam and the fourth fixing beam are respectively located on both sides of the battery cell assembly in one of the subspaces;

[0025] The number of battery cell groups in the subspace where the third fixed beam and the fourth fixed beam are located is less than the number of battery cell groups in other subspaces, so as to reserve clearance space for the main entrance and the main exit.

[0026] Optionally, the fixed beam assembly further includes a fifth fixed beam, which extends in the first direction and is located between and connected to the third and fourth fixed beams; the fifth fixed beam is used to separate the total inlet and the total outlet from the cell assembly in the subspace.

[0027] Optionally, the heat exchange plate assembly further includes two second heat exchange plates, each having the heat exchange channel. The two second heat exchange plates are located in the space enclosed by the second fixed beam, the third fixed beam, the fourth fixed beam, and the fifth fixed beam, and are respectively disposed on both sides of the battery cell assembly in the space.

[0028] Optionally, the main outflow channel further has a second connection inlet, and the outflow channel in the second fixed beam further has a second transmission outlet; the second connection inlet is connected to the outlet of the heat exchange channel in one of the second heat exchange plates; the second transmission outlet is connected to the inlet of the heat exchange channel in the second heat exchange plate.

[0029] The main inflow channel also has a second connecting outlet, and the inflow channel in the second fixed beam also has a second transmission inlet; the second connecting outlet is connected to the inlet of the heat exchange channel in another second heat exchange plate; the second transmission inlet is connected to the outlet of the heat exchange channel in the second heat exchange plate.

[0030] Optionally, the end faces of the first heat exchange plate that are opposite to the first fixed beam and the second fixed beam are respectively provided with mating bosses, which are corresponding to the inlet and outlet of the heat exchange channel. The mating bosses are inserted into the corresponding first connection outlet or first connection inlet and are sealed to the inner wall of the first connection outlet or first connection inlet.

[0031] Optionally, a first heat-insulating recess is provided on the surface of the first heat exchange plate opposite to the plane of the housing used to place the battery cell assembly.

[0032] Optionally, on each of the two sides of the first heat exchange plate in the first direction, a boss is provided at the edge of the side adjacent to the plane of the housing used to place the battery cell assembly. The boss has an inclined surface, which forms an angle with the plane of the housing used to place the battery cell assembly. The inclined surface and the plane of the housing used to place the battery cell assembly are welded together by solder.

[0033] Optionally, at least one of the first, second, third, and fourth fixing beams has a second heat-insulating recess on the surface of the housing opposite to the plane for placing the battery cell assembly.

[0034] Optionally, the heat exchange channel includes a plurality of straight channels extending along the second direction, and two connecting cavities located on both sides of the plurality of straight channels in the second direction. The connecting cavities are connected to an adjacent end of the plurality of straight channels, and the two connecting cavities are respectively provided with an inlet and an outlet of the heat exchange channel.

[0035] Optionally, at least one of the first heat exchange plates is provided with a plurality of exhaust holes extending along its thickness direction, and the plurality of exhaust holes are isolated from the heat exchange channel.

[0036] Optionally, both the second heat exchange plate and the adjacent first heat exchange plate are provided with a plurality of exhaust holes extending along their thickness direction, and the plurality of exhaust holes are isolated from the heat exchange channel.

[0037] The exhaust holes on the second heat exchange plate and the exhaust holes on the adjacent first heat exchange plate are staggered.

[0038] Optionally, an impact-resistant plate is provided on the side of the first heat exchange plate having the vent holes that is away from the battery cell assembly, and the impact-resistant plate has vent slits at the positions corresponding to each of the vent holes.

[0039] Optionally, the exhaust slit is configured to increase its opening area through deformation under air pressure when gas is discharged.

[0040] Optionally, a snap-fit ​​member is provided on the side of the first heat exchange plate having the exhaust hole that is away from the battery cell assembly. The snap-fit ​​member has a slot, and the edge of the shock-resistant plate is disposed in the slot.

[0041] Optionally, an exhaust gap is provided between the two opposite sides of each of the two adjacent first heat exchange plates, and between the two opposite sides of the first heat exchange plate and the housing.

[0042] As another technical solution, the present invention also provides a battery pack, including a cell stack and a battery housing assembly for accommodating the cell stack, wherein the battery housing assembly adopts the battery housing assembly provided by the present invention.

[0043] Optionally, the battery cell groups in each subspace are multiple groups and arranged in a row along the second direction; the positive and negative electrode tabs of the battery cell are located on both sides of the battery cell in the second direction;

[0044] The cell stack also includes multiple series components, each of which is disposed in a corresponding subspace to realize the series connection of multiple sets of cells in the corresponding subspace.

[0045] Optionally, each of the series components includes at least one first integrated board and two end components, wherein each first integrated board is correspondingly disposed between each of two adjacent groups of the battery cells, and a first busbar is disposed on the first integrated board for connecting two batteries of the same layer in the corresponding two adjacent groups of the battery cells in series.

[0046] The two end assemblies are respectively located on both sides of the multiple sets of battery cells arranged in a row in the second direction. Each end assembly includes a second integrated board and an end plate. The second integrated board is provided with a second busbar for connecting two adjacent battery cells of different layers adjacent to the second busbar in series. The end plate is located on the side of the second integrated board away from the battery cells and is connected to the second integrated board. The side of the end plate facing away from the second integrated board is provided with a fixing structure. The fixing structure is detachably connected to the first fixing beam or the second fixing beam adjacent to it.

[0047] Optionally, the first integrated board is provided with a plurality of through holes spaced apart along a third direction, the third direction being perpendicular to the plane of the housing used to place the battery cell assembly; the through holes penetrate the first integrated board along the second direction;

[0048] The first busbar includes multiple U-shaped bends, each U-shaped bend passing through each of the through holes in a corresponding manner. The two bends of each U-shaped bend are stacked on the two adjacent sides of the first integrated plate and the corresponding two adjacent groups of battery cells, and are electrically connected to the two battery cell tabs on the same layer.

[0049] Optionally, a fireproof plate is also provided between each of the second integrated boards and the end plate. The fireproof plate has two protective flanges on both sides in the first direction. The protective flanges are at an angle to the fireproof plate and are used to cover the gap between the second integrated board and the adjacent battery cell assembly.

[0050] Optionally, the fixing structure includes a mounting boss, a heat insulation component, and fasteners, wherein the heat insulation component is stacked on the adjacent first fixing beam or second fixing beam, the mounting boss is stacked on the heat insulation component, and the fasteners pass through the mounting boss and the heat insulation component in sequence and are threadedly connected to the first fixing beam or the second fixing beam.

[0051] Optionally, the cell stack further includes at least one series component, each of the series components being disposed corresponding to two adjacent end assemblies in the first direction and located on the side of the second integrated board near the cell assembly, for electrically connecting the second busbar in the two adjacent end assemblies;

[0052] Each of the two end assemblies has a receiving groove on its second integrated plate for accommodating a portion of the serial component.

[0053] Optionally, the cell stack further includes at least one insulating protective sleeve, which is fitted onto the series component and located between the second integrated plates in the two end assemblies.

[0054] Optionally, the second integrated board is further provided with an electrode lead-out embedded therein, the electrode lead-out being electrically connected to the second busbar, and the electrode lead-out having an electrode terminal protruding from the surface of the second integrated board away from the battery cell assembly.

[0055] The second integrated plate has a protrusion that covers a portion of the electrode terminal.

[0056] Optionally, the battery housing assembly further includes a cell pressure plate assembly, which is located on the side of the heat exchange plate assembly away from the housing and is detachably connected to the heat exchange plate assembly to limit the expansion of the cell.

[0057] Optionally, the battery housing assembly adopts the battery housing assembly provided by the present invention;

[0058] Each of the first heat exchange plates has a plurality of threaded holes evenly distributed along the second direction on the surface opposite to the cell pressure plate assembly, and the threaded holes are spaced apart from the heat exchange channels.

[0059] The battery housing assembly also includes a plurality of fixing screws, each of which passes through the cell pressure plate assembly and is threadedly connected to each of the threaded holes.

[0060] Optionally, the cell pressure plate assembly includes a first pressure plate and a second pressure plate stacked sequentially in a direction away from the first heat exchange plate, wherein the first pressure plate is a flat plate; and the second pressure plate is provided with a concave-convex structure to enhance the overall strength of the cell pressure plate assembly.

[0061] Optionally, the concave-convex structure includes a plurality of first recesses corresponding to the regions where the plurality of battery cell groups are located, wherein the first recesses are recessed relative to the second pressure plate in a direction closer to the first pressure plate.

[0062] As another technical solution, the present invention also provides a battery system, including a battery pack and a battery management module for regulating the battery pack, wherein the battery pack adopts the battery pack provided by the present invention.

[0063] The present invention has the following beneficial effects:

[0064] The battery housing assembly provided by this invention utilizes a fixed beam assembly and a heat exchange plate assembly, both connected to the housing, to form multiple sub-spaces for accommodating at least one set of battery cells. This divides the battery cells into several units for isolation, protection, and heat exchange (achieving heating, insulation, or cooling). Furthermore, by incorporating a heat exchange channel structure in the heat exchange plate assembly and a transmission channel structure in the fixed beam assembly, and connecting the heat exchange channel structure to a fluid supply source, a complete heat exchange loop can be formed within the housing. This enables the circulating flow of the heat exchange fluid and allows the heat exchange loop to be embedded within the housing, forming multiple branches. This effectively increases the heat transfer area of ​​the battery cell stack, thereby improving thermal management efficiency and temperature distribution uniformity, and solving the problem of large temperature differences in existing battery systems. Furthermore, by incorporating the fixed beam assembly as part of the heat exchange loop, both increased enclosure strength and heat transfer can be achieved. This eliminates the need for additional liquid cooling components (such as water pipes, adapters, and flow channels) in traditional battery system liquid cooling designs, enabling integration of the enclosure and heat transfer structure, improving space utilization, and saving material and process costs. Additionally, the battery enclosure assembly provided by this invention allows for direct installation of individual cell groups; that is, the cell stack can adopt an integrated, non-modular design. This eliminates the need for traditional modular components (such as cell supports, side plates, and base plates). Compared to traditional MTP battery systems, this improves system space utilization and assembly efficiency, reduces weight, and significantly increases the energy density of the entire battery system.

[0065] The battery pack provided by this invention, by employing the aforementioned battery housing assembly, not only improves the uniformity of temperature distribution and solves the problem of large temperature differences in existing battery systems, but also eliminates the need for additional heat transfer components (such as water pipes, adapters, flow channels, etc.) in traditional battery system heat transfer designs. This allows for the integration of the housing and heat transfer structure, improving space utilization and saving material and process costs. Furthermore, the battery pack provided by this invention allows for an integrated, non-modular design of the cell stack, eliminating the need for traditional modular components (such as cell supports, side plates, base plates, etc.). Compared to traditional MTP battery systems, this improves system space utilization and assembly efficiency, reduces weight, and significantly increases the energy density of the entire battery system.

[0066] The battery system provided by this invention, by employing the aforementioned battery pack, not only improves the uniformity of temperature distribution, solving the problem of large temperature differences in existing battery systems, but also eliminates the need for additional heat transfer components (such as water pipes, adapters, flow channels, etc.) in traditional battery system heat transfer designs. This allows for the integration of the housing and heat transfer structure, improving space utilization and saving material and process costs. Furthermore, the battery system provided by this invention allows for an integrated, modular design of the cell stack, eliminating the need for traditionally designed module components (such as cell supports, side plates, base plates, etc.). Compared to traditional MTP battery systems, this improves system space utilization and assembly efficiency, reduces weight, and significantly increases the energy density of the entire battery system. Attached Figure Description

[0067] Figure 1 This is a structural diagram of the battery housing assembly provided in an embodiment of the present invention after the battery cell stack is installed;

[0068] Figure 2 This is an exploded view of the battery housing assembly provided in an embodiment of the present invention after the battery cell stack has been installed;

[0069] Figure 3A This is an exploded view of the battery housing assembly provided in an embodiment of the present invention;

[0070] Figure 3B This is a top view of the battery housing assembly provided in an embodiment of the present invention;

[0071] Figure 4A This is an exploded view of the structure of the first heat exchange plate and the impact-resistant plate with vent holes used in an embodiment of the present invention;

[0072] Figure 4B This is a partial structural diagram of two adjacent first heat exchange plates with exhaust holes used in an embodiment of the present invention;

[0073] Figure 5 This is a structural diagram of the first heat exchange plate without exhaust vents used in an embodiment of the present invention;

[0074] Figure 6 This is a cross-sectional view of the first heat exchange plate without exhaust vents used in an embodiment of the present invention.

[0075] Figure 7 This is a structural diagram of the snap-fit ​​component on the first heat exchange plate with vent holes used in an embodiment of the present invention;

[0076] Figure 8 This is a structural diagram of the third fixed beam used in an embodiment of the present invention;

[0077] Figure 9 This is a structural diagram of the fourth fixed beam used in an embodiment of the present invention;

[0078] Figure 10 This is a diagram of the end structure of the fourth fixed beam used in an embodiment of the present invention;

[0079] Figure 11 This is a structural diagram of the first fixed beam used in an embodiment of the present invention;

[0080] Figure 12 This is a structural diagram of the battery cell stack used in an embodiment of the present invention;

[0081] Figure 13 This is a structural diagram of the battery cell used in an embodiment of the present invention;

[0082] Figure 14 This is an exploded structural diagram of the first integrated board and the end assembly used in an embodiment of the present invention;

[0083] Figure 15 This is an exploded structural diagram of the end component used in an embodiment of the present invention;

[0084] Figure 16A This is a partial structural diagram of the battery housing assembly provided in an embodiment of the present invention after the battery cell stack is installed;

[0085] Figure 16B for Figure 16A Enlarged view of region I in the image;

[0086] Figure 17A This is a structural diagram of the series components used in an embodiment of the present invention;

[0087] Figure 17B This is a partial structural diagram of two adjacent end components used in an embodiment of the present invention;

[0088] Figure 18A This is a structural diagram of the second integrated board used in an embodiment of the present invention;

[0089] Figure 18B This is a structural diagram of the electrode lead-out component used in an embodiment of the present invention;

[0090] Figure 19 This is an exploded structural diagram of the cell pressure plate assembly used in an embodiment of the present invention. Detailed Implementation

[0091] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0092] The shapes and sizes of the components in the accompanying drawings do not reflect actual proportions and are intended only to facilitate understanding of the embodiments of the present invention.

[0093] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an,” “a,” or “the,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “including,” “comprising,” or “containing,” and similar terms mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. The terms “connected,” “linked,” or similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” and “right,” etc., are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0094] This disclosure is not limited to the embodiments shown in the accompanying drawings, but includes modifications to the configuration based on the manufacturing process. Therefore, the areas illustrated in the drawings are schematic, and the shapes of the areas shown illustrate specific shapes of the areas of an element, but are not intended to be limiting.

[0095] Please refer to the following: Figures 1 to 16B This invention provides a battery housing assembly 100 for accommodating a battery cell stack 2, so as to... Figure 12 Taking the shown cell stack 2 as an example, the cell stack 2 includes multiple sets of cell groups 21, which are arranged in a row in the Y direction and have multiple rows in the X direction. Figure 13Taking the dual-headed battery cell as an example, each battery cell group 21 is composed of multiple battery cells 211 stacked together, for example along... Figure 13 The cells are stacked in the Z direction, with the positive electrode tab 211a and negative electrode tab 211b of each cell 211 located on both sides of the cell 211 in the Y direction. Optionally, a heat sink 212 is also provided at the bottom of the cell 211 to improve the heat dissipation efficiency of the cell 211. Optionally, the above-mentioned cell stack 2 can adopt an integrated, non-modular design, directly installing each group of cells 21 in the battery box. This eliminates the need for traditionally designed module components (such as cell brackets, side plates, bottom plates, etc.). Compared with traditional MTP battery systems, it can improve system space utilization and assembly efficiency, reduce weight, and thus significantly improve the energy density of the entire battery system.

[0096] Specifically, the battery housing assembly 100 includes: a housing 1, a fixing beam assembly 4, and a heat exchange plate assembly 3, wherein, as shown in the figure... Figure 3A and Figure 3B As shown, the housing 1 includes, for example, a base plate 11 and a plane disposed on the base plate 11 for placing the battery cell assembly 21 (i.e., Figure 3A A frame 12 is provided on the upward-facing surface of the base plate 11. The frame 12 surrounds the edge of the base plate 11, and the space enclosed by the frame 12 and the base plate 11 is used to accommodate the aforementioned cell stack 2, fixing beam assembly 4, and heat exchange plate assembly 3. The battery housing assembly 100 also includes a top cover 6 for closing the space enclosed by the frame 12 and the base plate 11. Optionally, the frame 12 is welded to the base plate 11, for example, using FSW (Friction Stir Welding) process. Optionally, the frame 12 is formed by welding multiple side plates, and the multiple side plates can be welded together using a welding process such as CMT (Cold Metal Transfer).

[0097] Both the fixed beam assembly 4 and the heat exchange plate assembly 3 are connected to the housing 1, for example, by means such as CMT welding. The fixed beam assembly 4 and the heat exchange plate assembly 3 together form multiple subspaces A for accommodating at least one set of battery cell groups 21, such as... Figure 2 As shown, each subspace A can accommodate multiple sets of battery cells 21 arranged in a row along the Y direction. However, the embodiments of the present invention are not limited to this. In practical applications, each subspace can contain one or more sets of battery cells, and the arrangement of the battery cells in each subspace is not limited to this. Figure 2 As shown, the number and arrangement of cell groups in different subspaces can be the same or different.

[0098] The heat exchange plate assembly 3 includes a heat exchange channel structure, and the fixed beam assembly 4 includes a transmission channel structure. The transmission channel structure has a first connecting outlet and a first connecting inlet, respectively connected to the inlet and outlet of the heat exchange channel structure, and a total inlet and a total outlet, respectively connected to the outlet and inlet of a fluid supply source. The heat exchange fluid flowing from the outlet of the fluid supply source (not shown in the figure) can flow into the transmission channel structure via the total inlet, then sequentially flow into the heat exchange channel structure via the first connecting outlet and the inlet of the heat exchange channel structure, then sequentially flow into the transmission channel structure via the outlet and the first connecting inlet of the heat exchange channel structure, and finally return to the fluid supply source from the total outlet and the inlet of the fluid supply source. Thus, a complete heat exchange loop can be formed in the housing 1, realizing the circulating flow of the heat exchange fluid. When the heat exchange fluid serves a cooling function, it is, for example, a cooling liquid (e.g., cooling water) or a cooling gas; when it serves a heating or heat preservation function, it is, for example, a heated liquid or gas.

[0099] By utilizing the fixed beam assembly 4 and the heat exchange plate assembly 3, both connected to the housing 1 and forming multiple subspaces A for accommodating at least one set of battery cells, the battery cell assembly 21 can be divided into several units for isolation, protection, and heat exchange (achieving heating, insulation, or cooling). Simultaneously, by providing a heat exchange channel structure in the heat exchange plate assembly 3 and a transmission channel structure in the fixed beam assembly 4, and by connecting the heat exchange channel structure to the fluid supply source, a complete heat exchange loop can be formed within the housing, enabling the circulation of the heat exchange fluid. Furthermore, the heat exchange loop can be embedded within the housing and form multiple branches, effectively increasing the heat transfer area of ​​the battery cell stack 2. This makes it easier to improve thermal management efficiency and temperature distribution uniformity, solving the problem of large temperature differences in existing battery systems. Furthermore, by incorporating the fixed beam assembly 4 as part of the heat exchange loop, both the strength of the housing and heat transfer can be increased. This eliminates the need for additional heat transfer components (such as water pipes, adapters, flow channels, etc.) in traditional battery system heat transfer designs, thereby achieving integration of the housing and heat transfer structure, improving space utilization, and saving material and process costs. Additionally, the battery housing assembly provided in this embodiment allows for direct installation of individual cell groups; that is, the cell stack can adopt an integrated, non-modular design. This eliminates the need for traditional modular components (such as cell supports, side plates, base plates, etc.). Compared to traditional MTP battery systems, this improves system space utilization and assembly efficiency, reduces weight, and significantly increases the energy density of the entire battery system.

[0100] In some alternative embodiments, such as Figure 3A and Figure 3BAs shown, the fixed beam assembly 4 includes a first fixed beam 41, a second fixed beam 42, a third fixed beam 43, and a fourth fixed beam 44. These four fixed beams are, for example, elongated strips. The first fixed beam 41 and the second fixed beam 42 are both in the first direction (i.e., Figure 3A and Figure 3B Extending in the X direction (in the middle), and in the second direction (i.e., Figure 3A and Figure 3B The first and second directions are opposite to each other in the Y direction; the first and second directions are perpendicular to each other and both are perpendicular to the plane of the housing 1 used to place the battery cell assembly (i.e., Figure 3A The surfaces of the bottom plate 11 facing upwards are parallel to each other; the third fixed beam 43 and the fourth fixed beam 44 are both located between the first fixed beam 41 and the second fixed beam 42, and are both connected to both of them. Adjacent fixed beams can be connected by means such as CMT welding; the third fixed beam 43 and the fourth fixed beam 44 are both in the second direction (i.e., Figure 3A and Figure 3B Extending in the Y direction, and in the first direction (i.e., Figure 3A and Figure 3B The first fixed beam 41, the second fixed beam 42, the third fixed beam 43, and the fourth fixed beam 44 are opposite to each other in the X direction. The above-mentioned first fixed beam 41, second fixed beam 42, third fixed beam 43, and fourth fixed beam 44 can form a "well"-shaped structure, which can simultaneously serve as a reinforcing structural component and part of the heat exchange circuit. In practical applications, the first fixed beam 41 can be welded to the base plate 11 and the frame 12 first; then, the heat exchange plate assembly 3, the third fixed beam 43, and the fourth fixed beam 44 are assembled and welded together in sequence. After the heat exchange plate assembly 3, the third fixed beam 43, and the fourth fixed beam 44 are reliably connected, the second fixed beam 42 is then welded to the base plate 11 and the frame 12, thus completing the assembly and welding of the heat exchange plate assembly 3, the fixed beam assembly 4, and the housing 1.

[0101] In some alternative embodiments, such as Figure 3A and Figure 3B As shown, the heat exchange plate assembly 3 includes a plurality of first heat exchange plates 31, and at least one of the first heat exchange plates 31a has an exhaust port (described in detail below), such as Figure 4A As shown; the remaining first heat exchange plates 31b do not have exhaust vents, as... Figure 5 As shown; multiple first heat exchange plates 31 are located between the first fixed beam 41 and the second fixed beam 42, and are connected to both of them, for example, using a welding process such as CMT (Cold Metal Transfer). The multiple first heat exchange plates 31 are, for example, elongated strips, and are all located in the second direction (i.e., Figure 3A and Figure 3B Extending in the Y direction, and in the first direction (i.e., Figure 3A and Figure 3BThe first heat exchange plates 31 are arranged at intervals along the X direction (in the image); each pair of adjacent first heat exchange plates 31, together with the first fixed beam 41 and the second fixed beam 42, forms a subspace A. By forming subspace A with each pair of adjacent first heat exchange plates 31, together with the first fixed beam 41 and the second fixed beam 42, the cell assembly 21 can be divided into several units for isolation, protection, and heat exchange (achieving heating, insulation, or cooling), thereby improving the uniformity of temperature distribution and solving the problem of large temperature differences in existing battery systems. In addition, the isolation and protection function of the first heat exchange plates 31 can also prevent the high-temperature gases and ejected materials from igniting adjacent cell assemblies in the event of thermal runaway of the cell stack, that is, it protects the cells in the subspace A it encloses and prevents the spread of thermal runaway. Optionally, in the two adjacent first heat exchange plates constituting the same subspace A, one first heat exchange plate 31a has an exhaust port, and the other first heat exchange plate 31b does not have an exhaust port.

[0102] Optionally, the surface of the first heat exchange plate 31 is parallel to the plane of the housing 1 used to place the battery cell assembly (i.e., Figure 3A The surfaces of the bottom plate 11 facing upwards are perpendicular to each other, that is, the surface of the first heat exchange plate 31 is parallel to the Z direction.

[0103] Taking a dual-ended battery cell (i.e., the two tabs of the battery cell are located on both sides of the battery cell) as an example, the extension direction of the tabs of the battery cell 211 is parallel to the extension direction of the first heat exchange plate 31 mentioned above, i.e., the second direction. When there are multiple battery cell groups 21 in the same subspace A, the multiple battery cell groups 21 are arranged in a row along the second direction. In this case, the two first heat exchange plates 31 corresponding to each subspace A can cool, heat or keep warm each row of battery cell groups 21. On this basis, the first fixing beam 41 and the second fixing beam 42 can be used to fix the two ends of each row of battery cell groups 21 in the subspace A, and at the same time have the function of heat transfer, thereby effectively increasing the heat transfer area of ​​the battery cell stack 2, thereby making it easier to improve the thermal management efficiency, improve the temperature distribution uniformity, and solve the problem of large temperature difference in the battery system in the prior art.

[0104] In some alternative embodiments, such as Figure 6 As shown, the above-mentioned heat exchange channel structure includes heat exchange channels 34 disposed in each first heat exchange plate 31; as Figures 8 to 11 As shown, the transmission channel structure includes mutually isolated inflow channels 411 and 421 disposed in each of the first fixed beam 41 and the second fixed beam 42, and a total inflow channel 431 and a total outflow channel 441 disposed in the third fixed beam 43 and the fourth fixed beam 44, respectively; wherein, as Figure 11As shown, each inflow channel 411 has a first transmission inlet 411a and multiple first connection outlets 411b. The first transmission inlet 411a is connected to the outlet 431b of the total inflow channel 431. The multiple first connection outlets 411b are connected one-to-one with the inlets 34a of the heat exchange channels 34 in the multiple first heat exchange plates 31. The inlet of the total inflow channel 431 is the total inlet 431a. Each outflow channel 421 has a first transmission outlet 412a and multiple first connection inlets 412b. The first transmission outlet 412a is connected to the inlet 441b of the total outflow channel 441. The multiple first connection inlets 412b are connected one-to-one with the outlets 34b of the heat exchange channels 34 in the multiple first heat exchange plates 31. The outlet of the total outflow channel 441 is the total outlet 441a.

[0105] The heat exchange fluid flowing out of the outlet of the fluid supply source can flow into the total inlet channel 431 in the third fixed beam 43 via the total inlet (i.e., the inlet of the total inlet channel 431) 431a; then sequentially flow into the inlet channel 411 via the outlet 431b of the total inlet channel 431 and the first transmission inlet 411a of the inlet channel 411 in each of the first fixed beam 41 and the second fixed beam 42; then sequentially flow into the respective heat exchangers via the respective first connection outlets 411b of the inlet channel 411 and the inlet 34a of the corresponding respective heat exchange channels 34 in the respective first heat exchange plates 31. The fluid flows into the outlet channel 34 sequentially via the outlet 34b of each heat exchange channel 34 and the first connecting inlet 412b corresponding to each outlet 34b in each of the first fixed beam 41 and the second fixed beam 42. Then, it flows into the total outlet channel 441 sequentially via the first transmission outlet 412a of the outlet channel 421 and the inlet 441b of the total outlet channel 441 in the fourth fixed beam 44. Finally, it returns to the fluid supply source sequentially via the total outlet (i.e., the outlet of the total outlet channel 441) 441a and the inlet of the fluid supply source. Thus, a complete heat exchange loop can be formed in the first to fourth fixed beams and the plurality of first heat exchange plates 31, realizing the circulating flow of the heat exchange fluid.

[0106] In some alternative embodiments, such as Figure 6 As shown, the inlet 34a and outlet 34b of the heat exchange channel 34 are at different heights in a third direction (i.e., the Z direction); this third direction (i.e., the Z direction) is different from the plane of the housing 1 used to place the battery cell assembly (i.e., Figure 3AThe surfaces of the bottom plate 11 facing upwards are perpendicular to each other, meaning that the inlet 34a and outlet 34b of the heat exchange channel 34 are arranged in different layers. The inflow channel 411 and outlet channel 421 in each of the first fixed beam 41 and the second fixed beam 42 are arranged at intervals in the third direction. The first connecting outlet 411b of the inflow channel 411 is connected to the corresponding inlet 34a of the heat exchange channel 34 at the same height; the first connecting inlet 412b of the outlet channel 421 is connected to the corresponding outlet 34b of the heat exchange channel 34 at the same height; as... Figure 8 and Figure 9 As shown, the main inflow channel 431 and the main outflow channel 441 are at different heights in the third direction, and the main inlet 431a is connected to the first transmission outlet 412a at the same height; the main outlet 441a is connected to the first transmission inlet 411a at the same height. Thus, the inflow channel 411 and the outflow channel 421 are arranged in different layers, and their heights correspond to the inlet 34a and outlet 34b of the heat exchange channel 34, respectively. Optionally, the inlet 34a of the heat exchange channel 34 can be higher than or lower than the outlet 34b.

[0107] In some optional embodiments, in each pair of adjacent first heat exchange plates 31, the inlet 34a and outlet 34b of the heat exchange channel 34 in one first heat exchange plate 31 are located on different sides from the inlet 34a and outlet 34b of the heat exchange channel 34 in the other first heat exchange plate 31. This allows the fluid to flow in opposite directions in each pair of adjacent first heat exchange plates 31, i.e., the fluid flow direction is approximately "S"-shaped along the arrangement direction of the multiple first heat exchange plates 31, thus achieving a better heat exchange effect.

[0108] In some alternative embodiments, such as Figure 11 As shown, a first gap 413 is provided in each of the first fixed beam 41 and the second fixed beam 42, and is located between the inflow channel 411 and the outflow channel 421. By means of the first gap 413, the heat exchange between the inflow channel 411 and the outflow channel 421 can be reduced, thereby avoiding the impact on the heat exchange efficiency.

[0109] In some optional embodiments, the inflow channel 411 and the outflow channel 421 in each of the first fixed beam 41 and the second fixed beam 42 are both straight channels penetrating the fixed beam along the X direction; the first gap 413 is a straight through hole penetrating the fixed beam along the X direction. Thus, the aforementioned straight channels and through holes can be fabricated in the first and second fixed beams using an aluminum extrusion molding process, resulting in a simple channel structure and processing technology, and low cost.

[0110] In some alternative embodiments, such as Figure 8 and Figure 9 As shown, the third fixed beam 43 and the fourth fixed beam 44 are respectively provided with second gaps (433, 443). The second gap 433 in the third fixed beam 43 is spaced apart from the main inflow channel 431 in the third direction (i.e., the Z direction); the second gap 443 in the fourth fixed beam 44 is spaced apart from the main outflow channel 441 in the third direction. With the help of the second gaps (433, 443), the heat exchange between the inflow channel 411 and the outflow channel 421 can be reduced, thereby avoiding the impact on the heat exchange efficiency. The arrangement order of the second gaps 433 and the main inflow channel 431 in the third direction is the opposite of the arrangement order of the second gaps 443 and the main outflow channel 441 in the third direction, so as to correspond to the heights of the corresponding outlets and inlets of the inflow channel 411 and the outflow channel 421 in each of the first fixed beam 41 and the second fixed beam 42.

[0111] Similarly, since the inlet 34a and outlet 34b of the heat exchange channels 34 in each of the two adjacent first heat exchange plates 31 are located on different sides, the arrangement order of the inflow and outflow channels in the first fixed beam 41 in the third direction needs to be reversed compared to the arrangement order of the inflow and outflow channels in the second fixed beam 42 in the third direction. This is to ensure that the heights of the corresponding outlets and inlets of the inflow and outflow channels in the first and second fixed beams 42 correspond to the heights of the inlet and outlet of the heat exchange channels 34 in each of the first heat exchange plates 31. Of course, in practical applications, the inlets of the heat exchange channels in each of the two adjacent first heat exchange plates can also be located on the same side, and the outlets of the heat exchange channels in each of the two adjacent first heat exchange plates can also be located on the same side, with the inlet and outlet heights of the inflow and outflow channels in the first and second fixed beams adjusted accordingly.

[0112] In some alternative embodiments, such as Figure 8 and Figure 9 As shown, the main inflow channel 431 and the main outflow channel 441 are both straight channels that pass through the third fixed beam and the fourth fixed beam respectively along the Y direction; the second gap (433, 443) are straight through holes that pass through the third fixed beam 43 or the fourth fixed beam 44 respectively along the Y direction. In this way, the above-mentioned straight channels and straight through holes can be fabricated in the third fixed beam 43 or the fourth fixed beam 44 using an aluminum extrusion molding process. The channel structure and processing technology are simple and the cost is low.

[0113] In some alternative embodiments, such as Figure 3AAs shown, the third fixed beam 43 or the fourth fixed beam 44 are located on both sides of the battery cell group in one of the subspaces A; the number of battery cell groups 21 in the subspace A where the third fixed beam 43 or the fourth fixed beam 44 is located is less than the number of battery cell groups 21 in other subspaces, so as to reserve clearance space for the total entrance 431a and the total exit 441a, that is, Figure 2 Space B in the example. Figure 12 As shown, the cell stack 2 has 5 rows of cell groups in the X direction. The middle row has two cell groups 21, and the other rows have three cell groups 21. The middle row has one less cell group than the other rows. The space occupied by the missing cell group is the aforementioned clearance space, i.e. Figure 2 Space B in the middle.

[0114] In some alternative embodiments, such as Figure 3A As shown, the fixed beam assembly 4 also includes a fifth fixed beam 45, which extends in the first direction (i.e., the X direction) and is located between and connected to the third fixed beam 43 and the fourth fixed beam 44, for example, using a welding process such as CMT (Cold Metal Transfer). The fifth fixed beam 45 serves to separate the total inlet 431a and the total outlet 441a from the cell assembly in one of the subspaces. This allows the total inlet 431a and the total outlet 441a to be separately located in a separate space (i.e., Figure 2 In space B), it is convenient to connect to the corresponding pipeline of the fluid supply source. At the same time, this separate space can also be used to set the total positive / negative electrode lead-out structure of the cell stack 2.

[0115] In some alternative embodiments, such as Figure 3A As shown, the heat exchange plate assembly 3 also includes two second heat exchange plates 32, each containing a heat exchange channel 34, which has the same structure as the heat exchange channel in the first heat exchange plate 31. The two second heat exchange plates 32 are located within the space enclosed by the second fixed beam 42, the third fixed beam 43, the fourth fixed beam 44, and the fifth fixed beam 45, and are respectively positioned on both sides of the battery cell assembly 21 within this space. The two second heat exchange plates 32 are used to exchange heat with the battery cell assembly 21 located in the subspace corresponding to the fifth fixed beam 45. Furthermore, an exhaust gap exists between the two second heat exchange plates 32 and the adjacent first heat exchange plate 31, allowing high-temperature gas to flow along the exhaust gap in the event of thermal runaway. The width of this exhaust gap is, for example, greater than or equal to 5 mm, preferably greater than or equal to 5 mm, and less than or equal to 50 mm, for example, 20 mm, 25 mm, 30 mm, etc.

[0116] It should be noted that the embodiments of the present invention do not impose any particular restrictions on the setting method, layout and quantity of the above-mentioned avoidance space.

[0117] In some alternative embodiments, such as Figure 9 As shown, the main outflow channel 441 also has a second connection inlet 441c, such as Figure 11 As shown, the outflow channel in the second fixed beam 42 also has a second transmission outlet (not shown in the figure); the second connection inlet 441c is connected to the outlet of the heat exchange channel 34 in one of the second heat exchange plates 32; the aforementioned second transmission outlet is connected to the inlet of the heat exchange channel 34 in the second heat exchange plate 32; as Figure 8 As shown, the main inflow channel 431 also has a second connecting outlet 431c, and the inflow channel in the second fixed beam 42 also has a second transmission inlet (not shown in the figure); the second connecting outlet 431c is connected to the inlet of the heat exchange channel 34 in another second heat exchange plate 32; the second transmission inlet is connected to the outlet of the heat exchange channel 34 in the second heat exchange plate 32.

[0118] The fluid in the outflow channel of the second fixed beam 42 flows into the heat exchange channel 34 sequentially through the second transmission outlet and the inlet of the heat exchange channel 34 in one of the second heat exchange plates 32; then it flows into the total outflow channel 441 sequentially through the outlet of the heat exchange channel 34 and the second connecting inlet 441c of the corresponding total outflow channel 441. The fluid in the total inflow channel 431 of the third fixed beam 43 flows into the heat exchange channel 34 sequentially through its second connecting outlet 431c and the inlet of the heat exchange channel 34 in another second heat exchange plate 32; then it flows into the inflow channel sequentially through the outlet of the heat exchange channel 34 and the second transmission inlet of the corresponding inflow channel in the second fixed beam 42, and then flows to the heat exchange channels 34 in each of the first heat exchange plates 31. Thus, the heat exchange channels 34 in the two second heat exchange plates 32 can be connected into the heat exchange circuit.

[0119] In some alternative embodiments, such as Figure 10As shown, a mating boss 44a is provided on the end face of the fourth fixed beam 44 opposite to the second fixed beam 42, and at a position corresponding to the first transmission outlet 412a of the outflow channel of the second fixed beam 42. This mating boss 44a is annular and surrounds the inlet 441b of the main outflow channel 441. The mating boss 44a is inserted into the corresponding first transmission outlet 412a and is sealed to the inner wall of the first transmission outlet 412a. Specifically, solder can be applied to the outer circumferential surface of the mating boss 44a, and brazing can be used to weld and fix the outer circumferential surface of the mating boss 44a to the inner wall of the first transmission outlet 412a. This connection method can achieve both the positioning of the fourth fixed beam 44 and the second fixed beam 42, and the sealing connection between the corresponding inlet and outlet. Similarly, optionally, the end faces of the first heat exchange plate 31 opposite to the first fixed beam 41 and the second fixed beam 42 are respectively provided with mating bosses corresponding to the inlet and outlet of the heat exchange channel 34. These mating bosses have a structure similar to the aforementioned mating boss 44a, and are inserted into the corresponding first connection outlet or first connection inlet, sealingly connecting with the inner wall of the first connection outlet or first connection inlet. This connection method can both position the respective first heat exchange plates and achieve a sealed connection between the corresponding inlet and outlet. It should be noted that the aforementioned first to fourth fixed beams, and at least one of the first and second heat exchange plates, can be sealed to the corresponding inlet or outlet via the aforementioned mating bosses, or other connection methods can be used; the present invention does not impose any particular limitations on this.

[0120] In some alternative embodiments, such as Figure 6 As shown, the first heat exchange plate 31 and the plane of the housing 1 used to place the battery cell assembly (i.e., Figure 3A The surface opposite to the upper surface of the midsole plate 11 (i.e., Figure 6 A first heat-insulating recess 314 is provided on the downward-facing surface of the first heat exchange plate 31b. The first heat-insulating recess 314 reduces the contact area between the first heat exchange plate 31b and the housing 1, thereby preventing any impact on heat exchange efficiency. Optionally, the first heat-insulating recess 314 can be composed of multiple protrusions 314a provided on the surfaces of the first heat exchange plate 31 adjacent to the housing 1. Optionally, the second heat exchange plate 32 can also be provided with the first heat-insulating recess 314.

[0121] In some alternative embodiments, such as Figure 10 As shown, the fourth fixed beam 44 has two sides (i.e., the surface of the strip plate) in the first direction, each side of which is perpendicular to the plane of the housing 1 used to place the battery cell assembly 21 (i.e., Figure 3AA boss 444 is provided at the edge adjacent to the upward-facing surface of the bottom plate 11. The boss 444 has a slope, which is adjacent to the plane of the housing 1 used to place the battery cell assembly (i.e., Figure 3A The surface of the bottom plate 11 facing upwards forms an angle with the inclined surface of the box 1 used to place the battery cell assembly (i.e., Figure 3A The fourth fixing beam 44 and the housing 1 (i.e., the bottom plate 11) are welded together using solder. This achieves both welding and fixing of the fourth fixing beam 44 to the housing 1 (i.e., the bottom plate 11) and reduces the contact area between the fourth fixing beam 44 and the housing 1 (i.e., the bottom plate 11), thus preventing any impact on heat exchange efficiency. Similarly, on each of the two sides of the first heat exchange plate 31 in the first direction (i.e., the surface of the strip plate), a boss is provided at the edge adjacent to the plane of the housing used to place the battery cell assembly 21. This boss has the same structure as the aforementioned boss 444, having a slope that is adjacent to the plane of the housing 1 used to place the battery cell assembly (i.e., the bottom plate 11). Figure 3A The surface of the bottom plate 11 facing upwards forms an angle with the inclined surface of the box 1 used to place the battery cell assembly (i.e., Figure 3A The first heat exchange plate 31 and the housing 1 are welded together using solder. This achieves both welding and fixing of the first heat exchange plate 31 to the housing 1 and reduces the contact area between the first heat exchange plate 31 and the housing 1, thus preventing any impact on heat exchange efficiency. Optionally, the second heat exchange plate 32 can be welded and fixed to the housing in the same way as the first heat exchange plate 31. It should be noted that the first to fourth fixing beams, and at least one of the first and second heat exchange plates, can be connected to the plane of the housing 1 used for placing the battery cell assembly (i.e., ...) via the aforementioned boss 444. Figure 3A Welding of the top surface of the bottom plate 11.

[0122] In some alternative embodiments, such as Figure 10 As shown, the fourth fixed beam 44 and the plane of the housing 1 used to place the battery cell assembly (i.e., Figure 3A A second heat-insulating recess 442 is provided on the surface opposite to the upward-facing surface of the bottom plate 11. The second heat-insulating recess 442 reduces the contact area between the fourth fixing beam 44 and the housing 1, thereby preventing the heat exchange efficiency from being affected. It should be noted that at least one of the first, second, third, and fourth fixing beams may have the aforementioned second heat-insulating recess 442 provided on the surface of the housing opposite the plane used to house the battery cell assembly.

[0123] In some alternative embodiments, such as Figure 6As shown, the heat exchange channel 34 includes multiple straight channels 341 extending along a second direction (i.e., the Y direction), and two connecting cavities 342 located on both sides of the multiple straight channels 341 in the second direction. Each connecting cavity 342 communicates with an adjacent end of one of the multiple straight channels 341, and each connecting cavity 342 is respectively provided with an inlet 34a and an outlet 34b of the heat exchange channel 34. This arrangement allows the heat exchange channels 34 to be evenly distributed within the first heat exchange plate 31, thereby improving heat exchange efficiency. Of course, in practical applications, the heat exchange channel can also adopt any other structure, and this embodiment of the invention does not impose any particular limitations on this.

[0124] In some alternative embodiments, such as Figure 4A As shown, at least one first heat exchange plate 31a is provided with a plurality of vent holes 311 extending along its thickness direction, and the plurality of vent holes 311 are isolated from the heat exchange channel 34. With the help of the vent holes, high-temperature gases and ejected materials can be discharged in a timely manner in the event of thermal runaway of the cell stack 2. The aforementioned vent holes 311 are located in the solid portion of the first heat exchange plate 31a without the heat exchange channel 34, thus avoiding the heat exchange channel 34 and ensuring the sealing of the heat exchange channel 34. Optionally, the plurality of vent holes 311 are evenly distributed on the surface of the first heat exchange plate 31a. Optionally, at least one second heat exchange plate 32 may also be provided with a plurality of vent holes 311 extending along its thickness direction. Further optionally, one second heat exchange plate 32 has vent holes 311, and the other second heat exchange plate 32 does not have vent holes 311.

[0125] In some alternative embodiments, such as Figure 4B As shown, the vent holes 311 on the second heat exchange plate 32 and the vent holes 311 on the adjacent first heat exchange plate 31a are staggered. This ensures that in the event of thermal runaway in the cell stack 2, the high-temperature gases and ejected materials discharged from the vent holes 311 on the second heat exchange plate 32 or the first heat exchange plate 31a will not directly spray onto adjacent cell groups from the opposite vent holes 311, thereby reducing the risk of igniting adjacent cell groups and preventing the spread of thermal runaway. Of course, in practical applications, depending on the layout of the heat exchange plates, there may also be two first heat exchange plates 31a arranged side-by-side with the aforementioned vent gap. In this case, the vent holes 311 on the two side-by-side first heat exchange plates 31a are staggered.

[0126] In some alternative embodiments, such as Figure 4AAs shown, an impact-resistant plate 33 is provided on the side of the first heat exchange plate 31a facing away from the battery cell assembly 21, which has an exhaust port 311. This impact-resistant plate 33 is made of a high-temperature resistant material, such as mica or high-temperature resistant silicone foam (capable of withstanding temperatures >600℃ for 5 minutes without spontaneous combustion, sheet material). The number of impact-resistant plates 33 corresponding to each first heat exchange plate 31a can be one or more, for example... Figure 4A The number of impact-resistant plates 33 corresponding to each first heat exchange plate 31a is three, and each impact-resistant plate 33 is provided with an exhaust slit 331 at the position of each exhaust hole 311. With the help of the exhaust slit 331, high-temperature gases and ejected materials can be discharged in a timely manner in the event of thermal runaway in the cell stack 2. Simultaneously, it can prevent high-temperature gases and ejected materials discharged from the opposite first heat exchange plate 31a from igniting adjacent cell groups, thereby preventing the spread of thermal runaway. Optionally, the width of the exhaust slit 331 is relatively small, so as to effectively prevent the spread of thermal runaway while promptly discharging high-temperature gases and ejected materials.

[0127] Preferably, the exhaust slit 331 is configured to increase its opening area through deformation under gas pressure when gas is being discharged. For example, the exhaust slit 331 is cross-shaped. This type of slit deforms (the corners of the cross curl up) under gas pressure, thereby increasing the opening area and making it easier to discharge high-temperature gas and ejected materials. Of course, in practical applications, the exhaust slit can also adopt other arbitrary shapes, such as a straight line, a zigzag line, or a wave shape. This embodiment of the invention does not have any particular limitations on this.

[0128] In some alternative embodiments, such as Figure 4A and Figure 7 As shown, a snap-fit ​​member 312 is provided on the side of the first heat exchange plate 31a, which has an exhaust hole 311, facing away from the battery cell assembly 21. This snap-fit ​​member 312 has a slot 312a, and the edge of the shock-absorbing plate 33 is disposed in the slot 312a. This allows for the installation and fixation of the shock-absorbing plate 33. When there are multiple shock-absorbing plates 33 corresponding to each first heat exchange plate 31a, the aforementioned snap-fit ​​member 312 is provided between each pair of adjacent shock-absorbing plates 33, and on the outer sides of the two outermost shock-absorbing plates 33 in the Y direction. The snap-fit ​​member 312 located between each pair of adjacent shock-absorbing plates 33 has two slots 312a.

[0129] In some optional embodiments, exhaust gaps are provided between the two opposing sides of each pair of adjacent first heat exchange plates 31, and between the two opposing sides of the first heat exchange plate 31 and the housing 1 (i.e., the frame 12), for example, as Figure 16BAs shown, an exhaust gap 121a is provided between the two opposing sides of the first heat exchange plate 31 and the frame 12. Optionally, a positioning protrusion 121 can be provided on the side of the frame 12 to isolate the exhaust gap 121a between the two opposing sides of the first heat exchange plate 31 and the frame 12. With the help of the exhaust gap, high-temperature gas can flow along the exhaust gap in the event of thermal runaway. The width of the exhaust gap is, for example, greater than or equal to 5 mm, preferably greater than or equal to 5 mm and less than or equal to 50 mm, for example, 20 mm, 25 mm, 30 mm, etc.

[0130] As another technical solution, embodiments of the present invention also provide a battery pack, such as... Figure 2 As shown, it includes a cell stack 2 and a battery housing assembly for accommodating the cell stack 2. The battery housing assembly 100 adopts the battery housing assembly 100 described above provided in the embodiments of the present invention.

[0131] In some alternative embodiments, the cell groups 21 in each subspace A are multiple groups and arranged in a row along the second direction, for example, using... Figure 12 The arrangement method; such as Figure 13 As shown, the positive electrode tab 211a and the negative electrode tab 211b of the battery cell 211 are located on both sides of the battery cell 211 in the second direction (i.e., the Y direction); the battery cell stack 2 also includes multiple series components, each of which is correspondingly arranged in each subspace A to realize the series connection of multiple battery cell groups 21 in the corresponding subspace A. Of course, in practical applications, the embodiments of the present invention are also applicable to single-ended battery cells (i.e., the positive electrode tab and the negative electrode tab of the battery cell are located on the same side of the battery cell).

[0132] In some alternative embodiments, such as Figure 14 As shown, each series assembly includes at least one first integrated board 221 and two end assemblies 22. The first integrated board 221 is made of an insulating material, such as plastic. Each first integrated board 221 is correspondingly disposed between each pair of adjacent cell groups 21, and a first busbar 222 is provided on the first integrated board 221 for connecting two cells 211 of the same layer in the corresponding pair of adjacent cell groups 21 in series.

[0133] The two end components 22 are located on both sides of the multiple sets of cells 21 arranged in a row in the second direction (i.e., the Y direction), as shown below. Figure 15As shown, each end assembly 22 may include a second integrated plate 223 and an end plate 225. The second integrated plate 223 is provided with a second busbar 224 for connecting two adjacent (i.e., adjacent in the Z direction) cells 211 of different layers adjacent to the second busbar 224 in series. The end plate 225 is located on the side of the second integrated plate 223 away from the cell group 21 and is connected to the second integrated plate 223 for fixing and protection. A fixing structure is provided on the side of the end plate 225 away from the second integrated plate 223. This fixing structure is detachably connected to the adjacent first fixing beam 41 or second fixing beam 42. With this configuration, the two ends of multiple cell groups 21 arranged in a row can be detachably connected to the first fixing beam 41 and the second fixing beam 42 respectively through the above-mentioned fixing structure. That is, the installation and fixing of multiple cell groups 21 arranged in a row can be achieved by means of the first fixing beam 41 and the second fixing beam 42, thereby improving the stability of fixing the cell groups 21. Furthermore, by integrating the first busbar 222 into the first integrated board 221, both series connection between two adjacent battery cell groups 21 and insulation between them can be achieved through the first integrated board 221. Similarly, by integrating the second busbar 224 into the second integrated board 223, both electrical connection between the second busbar 224 and its adjacent battery cell group 21 can be achieved, and insulation between the end plate 225 and the battery cell group 21 can be achieved through the second integrated board 223.

[0134] In some alternative embodiments, such as Figure 14 As shown, the first integrated board 221 has multiple through holes spaced apart along a third direction (i.e., the Z direction), which are parallel to the plane of the housing 1 used to place the battery cell assembly (i.e., Figure 3A The surfaces of the bottom plate 11 facing upwards are perpendicular to each other; the through hole extends through the first integrated plate 221 along the second direction (i.e., the Y direction); the first busbar 222 includes multiple U-shaped bends, each U-shaped bend passing through a corresponding through hole, and the two bent portions of each U-shaped bend are stacked on the two adjacent sides of the first integrated plate 221 and the corresponding two adjacent sets of battery cells 21, and are electrically connected to the two battery cell tabs of the same layer. The above-mentioned U-shaped bends can be formed by inserting conductive sheets into the corresponding through holes and then bending both ends to form a U-shaped structure. This structure has a simple installation method and low processing and material costs. The U-shaped bends are made of copper sheets, for example.

[0135] In some alternative embodiments, such as Figure 15As shown, a fireproof plate 226 is also provided between each second integrated plate 223 and the end plate 225. The fireproof plate 226 has a main body 226a located between each second integrated plate 223 and the end plate 225. Two protective flanges 226b are respectively provided on both sides of the main body 226a in a first direction (i.e., the X direction). The protective flanges 226b form an angle with the main body 226a of the fireproof plate 226, preferably 90°. The protective flanges 226b are used to cover the gap between the second integrated plate 223 and the adjacent cell assembly 21. With the help of the two protective flanges 226b, the weak part of the connection between the cell tab and the busbar can be protected, preventing high-temperature gases and ejected materials from entering the weak part and posing a potential hazard. The fireproof plate 226 is, for example, a mica board, or it can also be made of other heat-insulating materials with high temperature resistance and a certain strength. Optionally, the two protective flanges 226b are integrally formed with the main body 226a.

[0136] In some alternative embodiments, such as Figure 15 and Figure 16B As shown, the aforementioned fixing structure includes a mounting boss 225a, a heat insulation component 228, and a fastener 227. The heat insulation component 228 is stacked on the adjacent first fixing beam 41 or second fixing beam 42, the mounting boss 225a is stacked on the heat insulation component 228, and the fastener 227 passes through the mounting boss 225a and the heat insulation component 228 in sequence, and is threadedly connected to the first fixing beam 41 or second fixing beam 42. The heat insulation component 228 blocks heat exchange between the first and second fixing beams and the mounting boss 225a, thereby preventing the first and second fixing beams from being affected by the temperature of the battery cell stack. Optionally, the heat insulation component 228 can be made of FR4 (glass fiber epoxy resin) board, which has high strength and can provide heat insulation while preventing the fastener 227 from being crushed during tightening, thus avoiding heat insulation failure. Of course, in practical applications, the heat insulation component 228 can also be made of other heat insulation materials with high strength. Optionally, such as... Figure 16A As shown, each end component can be equipped with two fixing structures to further improve the stability of the fixed battery cell assembly.

[0137] In some alternative embodiments, such as Figure 17A and Figure 17B As shown, the cell stack 2 also includes at least one series component 23, each series component 23 being adjacent to two end components 22 in a first direction (i.e., the X direction). Figure 17BThe left-hand end assembly only shows the second integrated board 223; the right-hand end assembly only shows the second busbar 224. The busbar 224 is correspondingly positioned on the side of the second integrated board 223 closest to the cell assembly 21, and is used to electrically connect the second busbars 224 in two adjacent end assemblies 22. Each of the two adjacent end assemblies 22 has a receiving groove on its second integrated board 223 for accommodating a portion of the series component 23. Figure 17B The portion 223b corresponding to the series component 23 is provided with the receiving groove. By using the receiving groove on the second integrated plate 223 to cover a portion of the series component 23, the series component 23 can be insulated, preventing electrical conduction between it and the end plate 225.

[0138] In some alternative embodiments, such as Figure 17A and Figure 17B As shown, the cell stack 2 also includes at least one insulating protective sleeve 24, which is sleeved on the series component 23 and located between the second integrated plates 223 in the two end assemblies 22. The insulating protective sleeve 24, sleeved on the series component 23, provides insulation for the series component 23, preventing electrical conduction between it and the end plate 225. The insulating protective sleeve 24 also covers the exposed portion of the series component 23 located between the second integrated plates 223 in the two end assemblies 22, which is not covered by the aforementioned receiving groove of the second integrated plates 223, thereby further preventing electrical conduction between the series component 23 and the end plate 225.

[0139] In some alternative embodiments, such as Figure 18A and Figure 18B The second integrated board 223 also has an electrode lead-out member 229 nested therein. The electrode lead-out member 229 is electrically connected to the second busbar 224, and the electrode lead-out member 229 has an electrode terminal 229a protruding from the surface of the second integrated board 223 away from the cell assembly 21. The second integrated board 223 has a protrusion 223a covering a portion of the electrode terminal 229a. By integrating the electrode lead-out member 229 onto the second integrated board 223, the second integrated board 223 can insulate the electrode lead-out member 229. At the same time, the electrode lead-out member 229 can be led out by having an electrode terminal 229a protruding from the surface of the second integrated board 223 away from the cell assembly 21.

[0140] In some alternative embodiments, such as Figure 1 and Figure 2 As shown, the battery housing assembly also includes a cell pressure plate assembly 5, which is located on the side of the heat exchange plate assembly 3 away from the housing 1, that is, on the side of the cell stack 2 away from the housing 1, and is detachably connected to the heat exchange plate assembly 3 to limit the expansion of the cells in the cell stack 2.

[0141] In some alternative embodiments, such as Figure 4A and Figure 5 As shown, each of the first heat exchange plates 31 has a plurality of threaded holes 313 evenly distributed along the second direction (i.e., the Y direction) on its surface opposite to the cell pressure plate assembly 5. The threaded holes 313 are spaced apart from the heat exchange channels 34. The battery housing assembly 100 also includes a plurality of fixing screws (not shown in the figure), each fixing screw passing through the cell pressure plate assembly 5 and threadedly connected to each threaded hole 313. The threaded holes 313 are provided in the solid portion of the first heat exchange plate 31 where the heat exchange channels 34 are not provided, so as to avoid the heat exchange channels 34. Optionally, the threaded holes 313 may also be provided on the second heat exchange plate 32 and fixedly connected to the cell pressure plate assembly 5 by fixing screws.

[0142] In some alternative embodiments, such as Figure 19 As shown, the cell pressure plate assembly 5 includes a first pressure plate 5a and a second pressure plate 5b stacked sequentially in a direction away from the first heat exchange plate 31. The two can be fixedly connected by welding. The first pressure plate 5a is a flat plate; the second pressure plate 5b has a concave-convex structure to enhance the overall strength of the cell pressure plate assembly 5. By making the first pressure plate 5a a flat plate, the surfaces of the other cell stacks 2 that mate with it can be flat, ensuring that the accommodating space of the cell stacks 2 is not affected. At the same time, by using the second pressure plate 5b with the concave structure, the overall strength of the cell pressure plate assembly 5 can be enhanced, thereby effectively limiting the expansion of the cell.

[0143] Optional, such as Figure 19 As shown, the above-mentioned concave-convex structure includes a plurality of first recesses 51 corresponding to the areas where multiple sets of battery cells are located. The first recesses 51 are oriented relative to the second pressure plate 5b toward the first pressure plate 5a. Figure 19 The recesses (facing downwards) effectively limit the expansion of the battery cell. More preferably, each of the first recesses 51 can be further formed to bulge away from the first pressure plate 5a relative to the bottom surface of the first recess 51. Figure 19 Two protrusions 53 (facing upwards) further enhance the overall strength of the cell pressure plate assembly 5. Optionally, a buffer pad 52 is provided on the side of the second pressure plate 5b opposite to the first pressure plate 5a, corresponding to each of the first recesses 51. Figure 1 As shown, the buffer pad 52 is located between the upper cover 6 and the second pressure plate 5b, and is used to buffer between the two, thereby protecting the battery cell group corresponding to each buffer pad 52.

[0144] The battery pack provided in this embodiment of the invention, by employing the battery housing assembly described above, not only improves the uniformity of temperature distribution and solves the problem of large temperature differences in existing battery systems, but also eliminates the need for additional heat transfer components (such as water pipes, adapters, flow channels, etc.) in traditional battery system heat transfer designs. This allows for the integration of the housing and heat transfer structure, improving space utilization and saving material and process costs. Furthermore, the battery pack provided in this embodiment of the invention allows for an integrated, non-modular design of the cell stack, eliminating the need for traditionally designed modular components (such as cell supports, side plates, bottom plates, etc.). Compared to traditional MTP battery systems, this improves system space utilization and assembly efficiency, reduces weight, and significantly increases the energy density of the entire battery system.

[0145] As another technical solution, embodiments of the present invention also provide a battery system, including a battery pack and a battery management module for regulating the battery pack, wherein the battery pack adopts the battery pack described above in embodiments of the present invention.

[0146] The battery system provided in this embodiment of the invention, by employing the battery pack described above, not only improves the uniformity of temperature distribution and solves the problem of large temperature differences in existing battery systems, but also eliminates the need for additional heat transfer components (such as water pipes, adapters, flow channels, etc.) in traditional battery system heat transfer designs. This allows for the integration of the housing and heat transfer structure, improving space utilization and saving material and process costs. Furthermore, the battery system provided in this embodiment of the invention allows for an integrated, non-modular design of the cell stack, eliminating the need for traditionally designed module components (such as cell supports, side plates, base plates, etc.). Compared to traditional MTP battery systems, this improves system space utilization and assembly efficiency, reduces weight, and significantly increases the energy density of the entire battery system.

[0147] It should be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A battery housing assembly for accommodating a battery cell stack, the battery cell stack comprising multiple sets of battery cell groups, each set of battery cell groups being composed of multiple stacked battery cells; characterized in that, The battery housing assembly includes: a housing, a fixed beam assembly, and a heat exchange plate assembly, wherein the fixed beam assembly and the heat exchange plate assembly are both connected to the housing and together form a plurality of sub-spaces for accommodating at least one set of the battery cells; The heat exchange plate assembly is provided with a heat exchange channel structure, and the fixed beam assembly is provided with a transmission channel structure. The transmission channel structure has a first connecting outlet and a first connecting inlet that are respectively connected to the inlet and outlet of the heat exchange channel structure, and a total inlet and a total outlet that are respectively connected to the outlet and inlet of the fluid supply source. The fixed beam assembly includes a first fixed beam, a second fixed beam, a third fixed beam, and a fourth fixed beam, wherein the first fixed beam and the second fixed beam both extend in a first direction and are opposite to each other in a second direction; the first direction and the second direction are perpendicular to each other and both are parallel to the plane of the housing used to place the battery cell assembly; The third and fourth fixed beams are both located between the first and second fixed beams and are connected to both of them; the third and fourth fixed beams extend in the second direction and are opposite to each other in the first direction; the heat exchange plate assembly includes a plurality of first heat exchange plates, which are all located between the first and second fixed beams and are connected to both of them; the plurality of first heat exchange plates extend in the second direction and are spaced apart in the first direction; Each pair of adjacent first heat exchange plates, together with the first fixed beam and the second fixed beam, forms the subspace; the heat exchange channel structure includes a heat exchange channel disposed in each of the first heat exchange plates; The transmission channel structure includes mutually isolated inflow and outflow channels disposed in each of the first and second fixed beams, and a total inflow and total outflow channel respectively disposed in the third and fourth fixed beams; wherein, Each of the inflow channels has a first transmission inlet and multiple first connection outlets. The first transmission inlet is connected to the outlet of the total inflow channel. The multiple first connection outlets are connected one-to-one with the inlets of the heat exchange channels in the multiple first heat exchange plates. The inlet of the total inflow channel is the total inlet. Each of the outflow channels has a first transmission outlet and multiple first connection inlets, the first transmission outlet being connected to the inlet of the total outflow channel; the multiple first connection inlets being connected one-to-one with the outlets of the heat exchange channels in the multiple first heat exchange plates; the outlet of the total outflow channel is the total outlet.

2. The battery housing assembly according to claim 1, characterized in that, The inlet and outlet of the heat exchange channel are at different heights in a third direction; the third direction is perpendicular to the plane of the housing used to house the battery pack. The inflow channel and the outflow channel disposed in each of the first fixed beam and the second fixed beam are arranged at intervals in the third direction, the first connecting outlet of the inflow channel is connected to the inlet of the corresponding heat exchange channel at the same height; the first connecting inlet of the outflow channel is connected to the outlet of the corresponding heat exchange channel at the same height. The total inflow channel and the total outflow channel are at different heights in the third direction, and the total inlet is connected to the first transmission outlet at the same height; the total outlet is connected to the first transmission inlet at the same height.

3. The battery housing assembly according to claim 2, characterized in that, In each of two adjacent first heat exchange plates, the inlet and outlet of the heat exchange channel in one of the first heat exchange plates are located on different sides from the inlet and outlet of the heat exchange channel in the other first heat exchange plate.

4. The battery housing assembly according to claim 2, characterized in that, Each of the first fixed beam and the second fixed beam has a first gap provided between the inflow channel and the outflow channel.

5. The battery housing assembly according to claim 4, characterized in that, The inflow channel and the outflow channel provided in each of the first fixed beam and the second fixed beam are both straight channels that pass through the fixed beam; the first gap is a straight hole that passes through the fixed beam.

6. The battery housing assembly according to claim 2, characterized in that, Both the third fixed beam and the fourth fixed beam are provided with a second gap. The second gap in the third fixed beam and the main inflow channel are spaced apart on the third side upward. The second gap in the fourth fixed beam and the main outflow channel are spaced apart on the third side upward. The arrangement order of the second isolation section and the main inflow channel in the third direction is the opposite of the arrangement order of the second isolation section and the main outflow channel in the third direction.

7. The battery housing assembly according to claim 6, characterized in that, The main inflow channel and the main outflow channel are both straight channels that pass through the third fixed beam and the fourth fixed beam, respectively; the second gap is a straight through hole that passes through the third fixed beam or the fourth fixed beam in which it is located.

8. The battery housing assembly according to claim 1, characterized in that, The third fixed beam and the fourth fixed beam are respectively located on both sides of the battery cell assembly in one of the subspaces; The number of battery cell groups in the subspace where the third fixed beam and the fourth fixed beam are located is less than the number of battery cell groups in other subspaces, so as to reserve clearance space for the main entrance and the main exit.

9. The battery housing assembly according to claim 8, characterized in that, The fixed beam assembly further includes a fifth fixed beam, which extends in the first direction and is located between and connected to the third and fourth fixed beams. The fifth fixed beam is used to separate the main inlet and the main outlet from the cell assembly in the subspace.

10. The battery housing assembly according to claim 9, characterized in that, The heat exchange plate assembly further includes two second heat exchange plates, each having a heat exchange channel. The two second heat exchange plates are located in the space enclosed by the second fixed beam, the third fixed beam, the fourth fixed beam, and the fifth fixed beam, and are respectively disposed on both sides of the battery cell assembly in the space.

11. The battery housing assembly according to claim 10, characterized in that, The main outflow channel also has a second connection inlet, and the outflow channel in the second fixed beam also has a second transmission outlet; the second connection inlet is connected to the outlet of the heat exchange channel in one of the second heat exchange plates; the second transmission outlet is connected to the inlet of the heat exchange channel in the second heat exchange plate; The main inflow channel also has a second connecting outlet, and the inflow channel in the second fixed beam also has a second transmission inlet; the second connecting outlet is connected to the inlet of the heat exchange channel in another second heat exchange plate; the second transmission inlet is connected to the outlet of the heat exchange channel in the second heat exchange plate.

12. The battery housing assembly according to claim 1, characterized in that, On the end faces of the first heat exchange plate that are opposite to the first fixed beam and the second fixed beam, and corresponding to the inlet and outlet of the heat exchange channel, there are mating bosses. The mating bosses are inserted into the corresponding first connection outlet or first connection inlet and are sealed to the inner wall of the first connection outlet or first connection inlet.

13. The battery housing assembly according to claim 1, characterized in that, A first heat-insulating recess is provided on the surface of the first heat exchange plate opposite to the plane of the housing used to place the battery cell assembly.

14. The battery housing assembly according to claim 1, characterized in that, On the two sides of the first heat exchange plate in the first direction, each side has a boss at the edge adjacent to the plane of the housing used to place the battery cell assembly. The boss has an inclined surface, which forms an angle with the plane of the housing used to place the battery cell assembly. The inclined surface and the plane of the housing used to place the battery cell assembly are welded together by solder.

15. The battery housing assembly according to claim 1, characterized in that, At least one of the first fixed beam, the second fixed beam, the third fixed beam, and the fourth fixed beam has a second heat-insulating recess on its surface opposite to the plane of the housing used to place the battery cell assembly.

16. The battery housing assembly according to claim 1, characterized in that, The heat exchange channel includes a plurality of straight channels extending along the second direction, and two connecting cavities located on both sides of the plurality of straight channels in the second direction. The connecting cavities are connected to an adjacent end of the plurality of straight channels, and the two connecting cavities are respectively provided with an inlet and an outlet of the heat exchange channel.

17. The battery housing assembly according to claim 1, characterized in that, At least one of the first heat exchange plates is provided with a plurality of exhaust holes extending along its thickness direction, and the plurality of exhaust holes are isolated from the heat exchange channel.

18. The battery housing assembly according to claim 10, characterized in that, Both the second heat exchange plate and the adjacent first heat exchange plate are provided with a plurality of exhaust holes extending along their thickness direction, and the plurality of exhaust holes are isolated from the heat exchange channel. The exhaust holes on the second heat exchange plate and the exhaust holes on the adjacent first heat exchange plate are staggered.

19. The battery housing assembly according to claim 17, characterized in that, An impact-resistant plate is provided on the side of the first heat exchange plate with the vent holes that is away from the battery cell assembly. The impact-resistant plate has vent openings at the positions corresponding to each of the vent holes.

20. The battery housing assembly according to claim 19, characterized in that, The exhaust slit is designed to increase its opening area through deformation under air pressure when gas is being discharged.

21. The battery housing assembly according to claim 19, characterized in that, A snap-fit ​​element is provided on the side of the first heat exchange plate with the exhaust hole that is away from the battery cell assembly. The snap-fit ​​element has a slot, and the edge of the shock-resistant plate is disposed in the slot.

22. The battery housing assembly according to claim 1, characterized in that, An exhaust gap is provided between the two opposing sides of each pair of adjacent first heat exchange plates, and between the two opposing sides of the first heat exchange plate and the housing.

23. A battery pack, comprising a cell stack and a battery housing assembly for housing the cell stack, characterized in that, The battery housing assembly is the battery housing assembly described in any one of claims 1-22.

24. The battery pack according to claim 23, characterized in that, The battery cell groups in each subspace are multiple groups and arranged in a row along the second direction; the positive and negative electrode tabs of the battery cell are located on both sides of the battery cell in the second direction; The cell stack also includes multiple series components, each of which is disposed in a corresponding subspace to realize the series connection of multiple sets of cells in the corresponding subspace.

25. The battery pack according to claim 24, characterized in that, Each of the series components includes at least one first integrated board and two end components, wherein each first integrated board is correspondingly disposed between each of two adjacent groups of the battery cells, and a first busbar is disposed on the first integrated board for connecting two batteries of the same layer in the corresponding two adjacent groups of the battery cells in series. The two end assemblies are respectively located on both sides of the multiple sets of battery cells arranged in a row in the second direction. Each end assembly includes a second integrated board and an end plate. The second integrated board is provided with a second busbar for connecting two adjacent battery cells of different layers adjacent to the second busbar in series. The end plate is located on the side of the second integrated board away from the battery cells and is connected to the second integrated board. The side of the end plate facing away from the second integrated board is provided with a fixing structure. The fixing structure is detachably connected to the first fixing beam or the second fixing beam adjacent to it.

26. The battery pack according to claim 25, characterized in that, The first integrated board has a plurality of through holes spaced apart along a third direction, the third direction being perpendicular to the plane of the housing used to place the battery cell assembly; the through holes penetrate the first integrated board along the second direction. The first busbar includes multiple U-shaped bends, each U-shaped bend passing through each of the through holes in a corresponding manner. The two bends of each U-shaped bend are stacked on the two adjacent sides of the first integrated plate and the corresponding two adjacent groups of battery cells, and are electrically connected to the two battery cell tabs on the same layer.

27. The battery pack according to claim 25, characterized in that, A fireproof plate is also provided between each of the second integrated boards and the end plate. The fireproof plate has two protective flanges on both sides in the first direction. The protective flanges are at an angle to the fireproof plate and are used to block the gap between the second integrated board and the adjacent battery cell assembly.

28. The battery pack according to claim 25, characterized in that, The fixing structure includes a mounting boss, a heat insulation component, and fasteners. The heat insulation component is stacked on the adjacent first fixing beam or second fixing beam, the mounting boss is stacked on the heat insulation component, and the fasteners pass through the mounting boss and the heat insulation component in sequence and are threadedly connected to the first fixing beam or the second fixing beam.

29. The battery pack according to claim 25, characterized in that, The cell stack also includes at least one series component, each of the series components being disposed corresponding to two adjacent end assemblies in the first direction and located on the side of the second integrated board near the cell assembly, for electrically connecting the second busbar in the two adjacent end assemblies; Each of the two end assemblies has a receiving groove on its second integrated plate for accommodating a portion of the serial component.

30. The battery pack according to claim 29, characterized in that, The cell stack also includes at least one insulating protective sleeve, which is fitted onto the series component and located between the second integrated plates in the two end assemblies.

31. The battery pack according to claim 25, characterized in that, The second integrated board is also provided with an electrode lead-out member nested therein. The electrode lead-out member is electrically connected to the second busbar, and the electrode lead-out member has an electrode terminal protruding from the surface of the second integrated board away from the cell assembly. The second integrated plate has a protrusion that covers a portion of the electrode terminal.

32. The battery pack according to claim 23, characterized in that, The battery housing assembly also includes a cell pressure plate assembly, which is located on the side of the heat exchange plate assembly away from the housing and is detachably connected to the heat exchange plate assembly to limit the expansion of the cell.

33. The battery pack according to claim 32, characterized in that, The battery housing assembly adopts the battery housing assembly according to claim 3; Each of the first heat exchange plates has a plurality of threaded holes evenly distributed along the second direction on the surface opposite to the cell pressure plate assembly, and the threaded holes are spaced apart from the heat exchange channels. The battery housing assembly also includes a plurality of fixing screws, each of which passes through the cell pressure plate assembly and is threadedly connected to each of the threaded holes.

34. The battery pack according to claim 32, characterized in that, The cell pressure plate assembly includes a first pressure plate and a second pressure plate stacked sequentially in a direction away from the first heat exchange plate, wherein the first pressure plate is a flat plate; the second pressure plate is provided with a concave-convex structure to enhance the overall strength of the cell pressure plate assembly.

35. The battery pack according to claim 34, characterized in that, The concave-convex structure includes a plurality of first recesses corresponding to the regions where the multiple sets of battery cells are located, and the first recesses are recessed relative to the second pressure plate in a direction closer to the first pressure plate.

36. A battery system comprising a battery pack and a battery management module for regulating the battery pack, characterized in that, The battery pack is the battery pack described in any one of claims 23-35.

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