Battery module and battery pack

Abstract

Embodiments of the present disclosure relate to a battery module and a battery pack. The battery module comprises a frame, a plurality of bare cells, a sealing assembly, and a cooling assembly. The frame is provided with an accommodating space. The plurality of bare cells are arranged in the accommodating space. The sealing assembly is connected to the frame and seals the accommodating space. The cooling assembly comprises a liquid inlet pipe, a liquid inlet connector, and a liquid outlet connector, wherein the liquid inlet connector and the liquid outlet connector are both arranged on the outer side of the frame and located on the same side of the frame, the liquid inlet pipe is arranged in the accommodating space, one end of the liquid inlet pipe is connected to the liquid inlet connector, and the other end of the liquid inlet pipe extends to the side of the accommodating space away from the liquid inlet connector. According to the battery module and the battery pack, the problem of being difficult to meet the requirement of thermal management required by the battery can be mitigated.

Description

Battery module and battery pack

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to Chinese patent application number 202311630704.2, filed with the Chinese Patent Office on December 1, 2023, entitled “A Battery Module and Battery Pack,” the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to the field of battery technology, and in particular to a battery module and a battery pack. Background Art

[0004] With the advancement of technology, the concept of new energy is becoming increasingly widespread, and the application of new energy batteries is also becoming increasingly common. In existing technologies, lithium batteries generate a large amount of heat during use due to the need to output electrical energy, which causes the battery temperature to rise. However, excessively high lithium battery temperatures can easily lead to lithium battery failure, necessitating temperature management of lithium batteries.

[0005] The inventors found in their research that current lithium battery products all have fast charging requirements, and traditional lithium batteries have at least the following disadvantages: when the fast charging rate reaches 4C or above, the battery body and conductors generate severe heat, and air cooling and indirect liquid cooling can no longer meet the thermal management requirements. Summary of the Invention

[0006] The present disclosure provides a battery module that can improve the technical problem that the thermal management requirements required for batteries in the prior art are difficult to meet.

[0007] The present disclosure also provides a battery pack, which can improve the technical problem that the thermal management requirements required by batteries in the prior art are difficult to meet.

[0008] The embodiments of the present disclosure may be implemented as follows:

[0009] An embodiment of the present disclosure provides a battery module, comprising:

[0010] A frame body having a receiving space therein;

[0011] A plurality of bare battery cells are arranged in the accommodation space;

[0012] a sealing assembly connected to the frame and sealing the accommodation space; and

[0013] The cooling assembly includes a liquid inlet pipe, a liquid inlet joint and a liquid outlet joint; the liquid inlet joint and the liquid outlet joint are both arranged on the outside of the frame and on the same side of the frame; the liquid inlet pipe is arranged inside the accommodating space, and one end of the liquid inlet pipe is connected to the liquid inlet joint, and the other end extends to a side of the accommodating space away from the liquid inlet joint; the liquid inlet pipe is open at one end away from the liquid inlet joint.

[0014] Optionally, the liquid outlet connector is provided at the top of the outer side wall of the frame.

[0015] Optionally, the cooling component further includes an expansion pot, which is arranged at the outlet end of the liquid outlet joint and is used for discharging the heat exchange medium.

[0016] Optionally, the bare battery core is a cylindrical battery core, and the liquid inlet pipe is corrugated to avoid the bare battery core.

[0017] Optionally, a plurality of positioning grooves are opened at the bottom of the frame body, a first sealing gasket is provided in each positioning groove, a plurality of bare cells are respectively arranged in the plurality of positioning grooves, and the bare cells press the first sealing gasket.

[0018] Optionally, a receiving groove is further provided on the bottom wall of the positioning groove, the first sealing gasket is arranged inside the receiving groove, and a portion of the first sealing gasket is exposed from the receiving groove.

[0019] Optionally, an avoidance hole is provided on the bottom wall of the positioning groove, the first sealing gasket is annular, and the avoidance hole corresponds to the middle of the first sealing gasket; an explosion-proof valve is provided at the bottom of the bare battery cell, and the explosion-proof valve is exposed from the avoidance hole.

[0020] Optionally, the sealing assembly includes a wiring harness plate, a conductive bus and an output pole; the conductive bus is integrated inside the wiring harness plate; the conductive bus has an electrical connection portion electrically connected to the bare battery cell, and a avoidance groove is provided on the wiring harness plate to expose the electrical connection portion from the avoidance groove, and the electrical connection portion is welded to the pole of the bare battery cell; the conductive bus is electrically connected to the output pole, and the output pole is provided on one side of the wiring harness plate for outputting electrical energy.

[0021] Optionally, a plurality of positioning structures are provided on a side of the wiring harness plate close to the bare battery cell, the positioning structures forming a limiting groove, and the top of the bare battery cell is installed in the limiting groove.

[0022] Optionally, the battery module further includes a second sealing gasket, which is pressed between the sealing assembly and the frame.

[0023] An embodiment of the present disclosure further provides a battery pack, which includes the above-mentioned battery module and has all the functions of the battery module.

[0024] Compared with the existing technology, the advantages of the embodiments of the present disclosure include, for example:

[0025] During the operation of the battery, the heat exchange medium is introduced through the liquid inlet joint, and the heat exchange medium can be introduced from the liquid inlet pipe into the interior of the storage space, so that multiple bare cells are immersed in the heat exchange medium, so as to directly perform thermal management on the bare cells, which can improve the thermal management efficiency of the bare cells, thereby meeting the thermal management requirements of high-heat-generating battery modules. Among them, since the liquid inlet pipe extends from one side of the liquid inlet joint to the side of the storage space away from the liquid inlet joint, and the liquid outlet joint and the liquid inlet joint are arranged on the same side of the outside of the frame, the heat exchange medium needs to be discharged from the side of the storage space away from the liquid outlet joint after being introduced through the liquid inlet pipe, which can avoid the heat exchange medium being discharged from the liquid outlet joint as soon as it enters the storage space. At the same time, it can also allow the heat exchange medium to fully exchange heat with the bare cells, thereby improving the heat exchange efficiency and further improving the thermal management capability, which can further improve the technical problem that the thermal management requirements required for batteries in the existing technology are difficult to meet.

[0026] Furthermore, an expansion pot is provided on the liquid outlet joint. When the pressure of the heat exchange medium increases too much, the expansion of the expansion pot can provide a buffer for the heat exchange medium, thereby preventing the frame from being damaged due to increased pressure caused by excessive pressure of the heat exchange medium, and also reducing the risk of sealing failure.

[0027] In addition, by integrating the conductive bar inside the wiring harness board, the conductive bar and the wiring harness board form a whole, which is more convenient for sealing the accommodation space and can easily achieve hot spot separation. In the event of thermal runaway, the material ejected from the explosion-proof valve in the bare battery cell is isolated from the pole of the bare battery cell, which can improve the safety of the battery module and battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without any creative work.

[0029] FIG1 is a schematic structural diagram of a battery module provided in an embodiment of the present application;

[0030] FIG2 is a schematic diagram of an exploded structure of a battery module provided in an embodiment of the present application;

[0031] FIG3 is an enlarged structural diagram of point A in FIG2 ;

[0032] FIG4 is an enlarged structural diagram of point B in FIG2 ;

[0033] FIG5 is a schematic structural diagram of a sealing assembly provided in an embodiment of the present application;

[0034] FIG6 is an enlarged structural diagram of point C in FIG5 .

[0035] Icons: 10-battery module; 100-frame; 101-accommodating space; 110-positioning groove; 111-first sealing gasket; 112-avoidance hole; 200-bare battery cell; 210-pole; 300-sealing assembly; 310-wiring harness plate; 311-avoidance groove; 320-conductive bar; 321-electrical connection part; 3211-through hole; 322-negative electrode connection part; 330-output pole; 340-positioning structure; 341-limiting groove; 400-cooling assembly; 410-liquid inlet connector; 411-liquid inlet pipe; 420-liquid outlet connector; 421-expansion pot; 500-second sealing gasket. DETAILED DESCRIPTION

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are only some of the embodiments of the present disclosure, but not all of them. Generally, the components of the embodiments of the present disclosure described and shown in the drawings herein can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present disclosure provided in the accompanying drawings is not intended to limit the scope of the present disclosure as claimed, but merely represents selected embodiments of the present disclosure. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present disclosure without creative effort shall fall within the scope of protection of the present disclosure.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0039] In the description of the present disclosure, it should be noted that if the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the invented product is usually placed when used. It is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure.

[0040] In addition, the terms "first", "second", "third", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0041] Furthermore, the use of terms such as "horizontal," "vertical," and "overhanging" does not necessarily imply that the component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0042] It should also be noted that, in the description of this disclosure, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this disclosure based on the specific circumstances.

[0043] It should be noted that, in the absence of conflict, the features in the embodiments of the present disclosure may be combined with each other.

[0044] The following describes a specific embodiment of the battery module provided according to the embodiment of the present disclosure.

[0045] FIG1 is a schematic diagram of the overall structure of a specific embodiment of a battery module provided in an embodiment of the present disclosure.

[0046] As shown in Figure 1, an embodiment of the present application provides a battery module 10 for storing electrical energy and, when connected to an electrical device, delivering electrical energy to the device. The battery module 10 provided in this embodiment can address the technical issue of existing technologies that require thermal management for batteries.

[0047] FIG2 is a schematic diagram of an exploded structure of a specific embodiment of a battery module provided in an embodiment of the present disclosure.

[0048] As shown in Figure 2, the battery module 10 includes a frame 100, a plurality of bare cells 200, a sealing assembly 300 and a cooling assembly 400. A storage space 101 is provided in the frame 100. A plurality of bare cells 200 are arranged in the storage space 101. The sealing assembly 300 is connected to the frame 100 and closes the storage space 101. The cooling assembly 400 includes a liquid inlet pipe 411, a liquid inlet connector 410 and a liquid outlet connector 420; the liquid inlet connector 410 and the liquid outlet connector 420 are both provided on the outside of the frame 100 and on the same side of the frame 100; the liquid inlet pipe 411 is provided inside the storage space 101, and one end of the liquid inlet pipe 411 is connected to the liquid inlet connector 410, and the other end extends to the side of the storage space 101 away from the liquid inlet connector 410; the end of the liquid inlet pipe 411 away from the liquid inlet connector 410 is open.

[0049] As described above, during the operation of the battery, the heat exchange medium is introduced through the liquid inlet connector 410, and the heat exchange medium can be introduced into the interior of the accommodating space 101 from the liquid inlet pipe 411, so that multiple bare cells 200 are immersed in the heat exchange medium to directly perform thermal management on the bare cells 200, which can improve the thermal management efficiency of the bare cells 200, thereby meeting the thermal management requirements of the high-heat-generating battery module 10. Among them, since the liquid inlet pipe 411 extends from one side of the liquid inlet connector 410 to the side of the accommodating space 101 away from the liquid inlet connector 410, and opens at one end of the liquid inlet pipe 411 away from the liquid inlet connector 410, and the liquid outlet connector 420 and the liquid inlet connector 410 are arranged on the same side of the outside of the frame 100, the heat exchange medium needs to be discharged from the side of the accommodating space 101 away from the liquid outlet connector 420 after being introduced through the liquid inlet pipe 411, which can avoid the heat exchange medium being discharged from the liquid outlet connector 420 as soon as it enters the accommodating space 101. At the same time, it can also enable the heat exchange medium to fully exchange heat with the bare battery cell 200, thereby improving the heat exchange efficiency and further improving the thermal management capability, which can further improve the technical problem that the thermal management requirements required for the battery in the existing technology are difficult to meet.

[0050] It is worth noting that when the heat exchange medium is liquid, after the heat exchange medium is introduced into the storage space 101 from the liquid inlet pipe 411, it is collected in the storage space 101 until the liquid level of the heat exchange medium in the storage space 101 reaches the opening of the liquid outlet joint 420 located on the frame 100, and then is discharged from the liquid outlet joint 420. Since the liquid inlet pipe 411 extends to the side of the storage space 101 away from the liquid outlet joint 420, the heat exchange medium needs to flow from the side away from the liquid outlet joint 420 through the storage space 101 to the liquid outlet joint 420 and then be discharged, which can make the heat exchange medium fully contact with the bare battery cell 200, thereby achieving the purpose of improving the heat exchange efficiency. In addition, in this embodiment, the liquid inlet pipe 411 and the liquid inlet joint 410 are interconnected to form a channel structure passing through the peripheral wall of the frame 100, and a sealing structure is provided between the channel structure and the peripheral wall of the frame 100 to achieve sealing between the channel structure and the peripheral wall of the frame 100. The sealing structure may be a sealing rubber ring or a sealing coating provided between the channel structure and the peripheral wall of the frame 100 .

[0051] Optionally, the liquid outlet connector 420 is disposed at the top of the outer wall of the frame 100. When the battery module 10 is normally assembled and placed, the sealing assembly 300 is disposed at the top of the battery module 10, and the liquid outlet connector 420 is disposed at the top of the outer wall of the frame 100. This means that the liquid outlet connector 420 is disposed on the side of the outer wall of the frame 100 close to the sealing assembly 300. This allows the liquid level of the heat exchange medium in the accommodating space 101 to be higher, thereby allowing the heat exchange medium in the accommodating space 101 to submerge the multiple bare battery cells 200, thereby providing efficient heat exchange to the multiple bare battery cells 200.

[0052] It should be understood that in other embodiments of the present application, the location of the liquid outlet connector 420 may be adjusted according to actual conditions, thereby adjusting the liquid level of the heat exchange medium in the accommodating space 101 .

[0053] In addition, in this embodiment, the cooling component 400 also includes an expansion pot 421, which is arranged at the outlet end of the liquid outlet joint 420 and is used to discharge the heat exchange medium. In general, the expansion pot 421 is in a compressed state, and the internal space of the expansion pot 421 is relatively small. After the pressure of the heat exchange medium in the accommodating space 101 increases, the volume of the expansion pot 421 can be increased to absorb the impact force caused by the increase in the pressure of the heat exchange medium due to the increase in pressure, which plays a buffering role, is conducive to reducing the impact force on each seal of the accommodating space 101, preventing the frame 100 from being damaged due to the increase in pressure caused by the excessive pressure of the heat exchange medium, and can also reduce the risk of sealing failure.

[0054] Optionally, the bare cell 200 is a cylindrical cell, and the liquid inlet tube 411 is corrugated to avoid the bare cell 200. In this embodiment, multiple bare cells 200 are arranged to form multiple rows, and the bare cells 200 in two adjacent rows are staggered, which can increase the number of bare cells 200 arranged in the accommodation space 101. Based on this, the liquid inlet tube 411 is configured as a corrugated shape, which facilitates the liquid inlet tube 411 to pass through the gap between two adjacent rows of bare cells 200 and facilitates the arrangement of the liquid inlet tube 411.

[0055] FIG3 is an enlarged schematic diagram of point A in FIG2 .

[0056] 2 and 3 , in order to facilitate the installation of the bare cell 200 in the accommodating space 101, a plurality of positioning grooves 110 are provided at the bottom of the frame 100. A first sealing gasket 111 is provided in each positioning groove 110. The plurality of bare cells 200 are respectively arranged in the plurality of positioning grooves 110, and the bare cells 200 press the first sealing gasket 111. By providing a plurality of positioning grooves 110 at the bottom of the frame 100, the plurality of bare cells 200 can be provided with an installation positioning function, thereby improving the assembly efficiency and assembly accuracy of the plurality of bare cells 200. Providing the first sealing gasket 111 in the positioning groove 110 can improve the sealing performance between the bottom of the bare cell 200 and the bottom wall of the positioning groove 110.

[0057] In addition, in order to facilitate the arrangement of the first sealing gasket 111, a receiving groove (not shown) is further provided on the bottom wall of the positioning groove 110, and the first sealing gasket 111 is provided inside the receiving groove, and part of the first sealing gasket 111 is exposed from the receiving groove. Among them, the receiving groove is a ring-shaped groove body provided on the bottom wall of the positioning groove 110. When the first sealing gasket 111 is provided inside the receiving groove, the first sealing gasket 111 can be provided with a limiting and positioning function through the receiving groove to ensure the stability of the first sealing gasket 111. Exposing part of the first sealing gasket 111 to the receiving groove can facilitate the bare cell 200 to compress the first sealing gasket 111 when the bare cell 200 is installed in the positioning groove 110, ensuring stable contact between the first sealing gasket 111 and the bare cell 200, thereby improving the sealing effect. It is worth noting that the thickness of the first sealing gasket 111 provided inside the positioning groove 110 can be adjusted by adjusting the depth of the receiving groove, and then the sealing effect can be adjusted conveniently by adjusting the thickness of the first sealing gasket 111.

[0058] Furthermore, an escape hole 112 is provided on the bottom wall of the positioning groove 110. The first sealing gasket 111 is annular, and the escape hole 112 corresponds to the middle of the first sealing gasket 111. An explosion-proof valve is provided at the bottom of the bare cell 200, and the explosion-proof valve is exposed from the escape hole 112. The opening of the escape hole 112 facilitates the ejection of high-temperature materials out of the frame 100 when the bare cell 200 experiences thermal runaway, thereby preventing the formation of thermal runaway within the frame 100 and causing heat diffusion. The provision of the first sealing gasket 111 can precisely seal the bottom of the bare cell 200 and the area around the escape hole 112, preventing the heat exchange medium in the accommodating space 101 from leaking out of the escape hole 112.

[0059] In addition, the battery module 10 further includes a second sealing gasket 500, which is pressed between the sealing assembly 300 and the frame 100. The second sealing gasket 500 can improve the sealing performance between the sealing assembly 300 and the frame 100 and prevent the heat exchange medium from leaking.

[0060] FIG4 is an enlarged schematic diagram of point B in FIG2 .

[0061] 2 and 4 , the sealing assembly 300 includes a wiring harness plate 310, a conductive bar 320 and an output pole 330; the conductive bar 320 is integrated inside the wiring harness plate 310; the conductive bar 320 has an electrical connection portion 321 electrically connected to the bare battery cell 200, and a relief groove 311 is provided on the wiring harness plate 310 to expose the electrical connection portion 321 from the relief groove 311, and the electrical connection portion 321 is welded to the pole 210 of the bare battery cell 200; the conductive bar 320 is electrically connected to the output pole 330, and the output pole 330 is provided on one side of the wiring harness plate 310 for outputting electrical energy.

[0062] The conductive bar 320 and the wiring harness plate 310 can be arranged by embedding the conductive bar 320 into the wiring harness plate 310 through insert injection molding. In other words, the conductive bar 320 is placed in a mold, and injection molding material is injected into the mold so that the wiring harness plate 310 wraps around the conductive bar 320, thereby embedding the conductive bar 320 into the wiring harness plate 310. The output poles 330 are then arranged at both ends of the wiring harness plate 310 in the longitudinal direction.

[0063] By integrating the conductive bar 320 into the interior of the wiring harness plate 310, the conductive bar 320 and the wiring harness plate 310 form a whole, which is more convenient for sealing the accommodation space 101, and can easily achieve hot spot separation. In the event of thermal runaway, the material ejected from the explosion-proof valve in the bare cell 200 is isolated from the pole 210 of the bare cell 200, which can improve the safety of the battery module 10 and the battery pack.

[0064] FIG5 is a schematic structural diagram of a specific embodiment of a sealing assembly provided in an embodiment of the present disclosure.

[0065] FIG6 is an enlarged schematic diagram of point C in FIG5 .

[0066] 5 and 6 , when the sealing assembly 300 is assembled on the frame 100, the electrical connection portion 321 on the conductive bar 320 corresponds to the pole 210 of the bare cell 200, and the electrical connection portion 321 is provided with a through hole 3211 for exposing the pole 210 of the bare cell 200. After the sealing assembly 300 is installed on the frame 100, the pole 210 is welded to the electrical connection portion 321 by laser welding. At the same time, after the welding is completed, the through hole 3211 can be sealed by welding the pole 210 and the electrical connection portion 321, thereby achieving a seal at the pole 210 of the bare cell 200. This can eliminate the need for a separate sealing structure process, thereby reducing assembly costs. In addition, another negative electrode connection portion 322 is provided on the conductive bar 320 near the electrical connection portion 321. After assembly is completed, the negative electrode connection portion 322 contacts the negative electrode of the bare cell 200 to achieve electrical connection.

[0067] Optionally, in this embodiment, a plurality of positioning structures 340 are provided on a side of the wiring harness plate 310 proximate to the bare cells 200. The positioning structures 340 enclose a limiting groove 341, into which the top of the bare cells 200 is inserted. It is worth noting that the positioning structures 340 are provided as insulating structures, which not only provide positioning for the corresponding bare cells 200 but also achieve insulation isolation between adjacent bare cells 200.

[0068] Based on the battery module 10 provided above, this embodiment further provides a battery pack (not shown), which utilizes the battery module 10. Based on this, the battery provided in this embodiment can also improve the technical problem that the thermal management requirements required by batteries in the prior art are difficult to meet.

[0069] It is worth noting that a plurality of battery modules 10 can be provided in the battery pack, and any two adjacent battery modules 10 can be electrically connected to the bar through the output pole 330, so that the plurality of battery modules 10 can perform power management in a unified manner.

[0070] To sum up, during the operation of the battery, the heat exchange medium is introduced through the liquid inlet connector 410, and the heat exchange medium can be introduced into the accommodating space 101 from the liquid inlet pipe 411, so that multiple bare cells 200 are immersed in the heat exchange medium to directly perform thermal management on the bare cells 200, which can improve the thermal management efficiency of the bare cells 200, thereby meeting the thermal management requirements of the high-heat-generating battery module 10. Among them, since the liquid inlet pipe 411 extends from one side of the liquid inlet connector 410 to the side of the storage space 101 away from the liquid inlet connector 410, and the liquid outlet connector 420 and the liquid inlet connector 410 are arranged on the same side of the outside of the frame 100, the heat exchange medium needs to be discharged from the side of the storage space 101 away from the liquid outlet connector 420 after being introduced through the liquid inlet pipe 411. This can avoid the heat exchange medium being discharged from the liquid outlet connector 420 as soon as it enters the storage space 101. At the same time, it can also allow the heat exchange medium to fully exchange heat with the bare battery cell 200, thereby improving the heat exchange efficiency and thus improving the thermal management capability, which can further improve the technical problem that the thermal management requirements of the battery required by the prior art are difficult to meet. Furthermore, an expansion pot 421 is provided on the liquid outlet connector 420. When the pressure of the heat exchange medium increases too much, the expansion pot 421 can provide a buffer for the heat exchange medium through the expansion of the expansion pot 421, thereby preventing the frame 100 from being damaged due to the increase in pressure of the heat exchange medium due to excessive pressure, and can also reduce the risk of sealing failure. In addition, by integrating the conductive bar 320 into the interior of the wiring harness plate 310, the conductive bar 320 and the wiring harness plate 310 form a whole, which is more convenient for sealing the accommodation space 101, and can easily achieve hot spot separation. In the event of thermal runaway, the material ejected from the explosion-proof valve in the bare cell 200 is isolated from the pole 210 of the bare cell 200, which can improve the safety of the battery module 10 and the battery pack.

[0071] In some embodiments:

[0072] Please refer to Figure 1: Figure 1 shows a schematic structural diagram of a battery module 10 from an external perspective, wherein the battery module 10 includes a frame 100, a sealing assembly 300 disposed on the top of the frame 100, and a cooling assembly 400 extending from the frame 100. In addition, the battery module 100 also includes a bare battery cell 200 (because the bare battery cell 200 is located inside the frame 100, Figure 1 is an external perspective of the battery module 10, thus obscuring the bare battery cell 200).

[0073] Please refer to Figure 2: The battery module 10 shown in Figure 2 includes a frame 100, bare cells 200, a sealing assembly 300, and a cooling assembly 400. The frame 100 defines a storage space 101. Multiple bare cells 200 can be arranged in the storage space 101, each with a terminal 210. The sealing assembly 300 is connected to the top of the frame 100 and seals the storage space 101, thereby shielding the bare cells 200. The sealing assembly 300 also includes an output terminal 330, which is used to output electrical energy. The cooling assembly 400 includes a liquid inlet pipe 411, a liquid inlet connector 410, and a liquid outlet connector 420. The liquid inlet connector 410 and the liquid outlet connector 420 are both located outside the frame 100 and on the same side of the frame 100. The liquid inlet pipe 411 is located inside the accommodating space 101, with one end of the liquid inlet pipe 411 connected to the liquid inlet connector 410 and the other end extending to the side of the accommodating space 101 away from the liquid inlet connector 410. The end of the liquid inlet pipe 411 away from the liquid inlet connector 410 is open. In addition, an expansion pot 421 is provided at the outlet end of the liquid outlet connector 420. The expansion pot 421 is used to discharge the heat exchange medium. Specifically, the expansion pot 421 can provide impact buffering to prevent the frame 100 from being damaged by increased pressure due to excessive pressure of the heat exchange medium, and can also reduce the risk of seal failure.

[0074] Please refer to Figure 3: In the partially enlarged structure of the battery module 10 shown in Figure 3, the battery module 10 also includes a second sealing gasket 500, which is used to be pressed between the sealing component 300 and the frame 100, and can improve the sealing performance between the sealing component 300 and the frame 100 to prevent leakage of the heat exchange medium.

[0075] Please refer to Figure 4 : FIG4 shows an enlarged partial structure of the battery module 10. The sealing assembly 300 includes a wiring harness plate 310 and a conductive bar 320. The conductive bar 320 is integrated within the wiring harness plate 310. The conductive bar 320 has an electrical connection portion 321 for electrically connecting to the bare battery cell 200. The wiring harness plate 310 is provided with an escape groove 311 to expose the electrical connection portion 321 from the escape groove 311. The electrical connection portion 321 is used for welding to the electrode 210 of the bare battery cell 200. The conductive bar 320 is used to electrically connect to the output electrode 330. The conductive bar 320 and the wiring harness plate 310 can be arranged by embedding the conductive bar 320 into the wiring harness plate 310 through insert injection molding. In other words, the conductive bar 320 is placed in a mold, and injection molding material is injected into the mold so that the wiring harness plate 310 wraps around the conductive bar 320 to form the conductive bar 320, thereby embedding the conductive bar 320 into the wiring harness plate 310. Then, the output poles 330 are arranged at both ends of the wiring harness plate 310 in the length direction.

[0076] Please refer to FIG. 5 : FIG. 5 shows a sealing assembly 300 , which is substantially in the shape of a plate and is used for being installed on the top of the frame 100 .

[0077] Please refer to Figure 6: In the partially enlarged structural schematic diagram of the sealing assembly 300 shown in Figure 6, another negative electrode connection portion 322 is protruding downwardly on the conductive bar 320 near the electrical connection portion 321. After assembly is completed, the negative electrode connection portion 322 is used to contact the negative electrode of the bare cell 200 to achieve electrical connection. A plurality of positioning structures 340 are provided on the side of the wiring harness plate 310 close to the bare cell 200. The positioning structures 340 form a limiting groove 341, and the top of the bare cell 200 is installed in the limiting groove 341. It is worth noting that the positioning structure 340 is provided with an insulating structure, which can not only provide positioning for the corresponding bare cell 200, but also achieve insulation isolation between adjacent bare cells 200.

[0078] The above description is merely a specific embodiment of the present disclosure, but the scope of protection of the present disclosure is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this disclosure should be included in the scope of protection of the present disclosure. Therefore, the scope of protection of the present disclosure should be based on the scope of protection of the claims. Industrial Applicability

[0079] In summary, the present disclosure provides a battery module and a battery pack with high heat exchange efficiency, high thermal management capability, and high safety.

Claims

1. A battery module, characterized in that: include: A frame body having a receiving space therein; A plurality of bare cells are arranged in the accommodation space; A sealing assembly, connected to the frame and sealing the accommodation space; as well as, The cooling assembly includes a liquid inlet pipe, a liquid inlet joint and a liquid outlet joint; the liquid inlet joint and the liquid outlet joint are both arranged outside the frame and located on the same side of the frame; the liquid inlet pipe is arranged inside the accommodating space, and one end of the liquid inlet pipe is connected to the liquid inlet joint, and the other end extends to a side of the accommodating space away from the liquid inlet joint.

2. The battery module according to claim 1, characterized in that: The liquid outlet joint is arranged on the top of the outer side wall of the frame body.

3. The battery module according to claim 1, characterized in that: The cooling component also includes an expansion pot, which is arranged at the outlet end of the liquid outlet joint and is used for outlet of the heat exchange medium.

4. The battery module according to any one of claims 1 to 3, characterized in that: A plurality of positioning grooves are provided at the bottom of the frame body, a first sealing gasket is provided in each of the positioning grooves, a plurality of bare cells are respectively arranged in the plurality of positioning grooves, and the bare cells press the first sealing gasket.

5. The battery module according to claim 4, characterized in that: A receiving groove is also formed on the bottom wall of the positioning groove, the first sealing gasket is arranged inside the receiving groove, and a part of the first sealing gasket is exposed from the receiving groove.

6. The battery module according to claim 4, characterized in that: An avoidance hole is provided on the bottom wall of the positioning groove, the first sealing gasket is annular, and the avoidance hole corresponds to the middle part of the first sealing gasket; an explosion-proof valve is provided at the bottom of the bare battery cell, and the explosion-proof valve is exposed from the avoidance hole.

7. The battery module according to any one of claims 1 to 3, characterized in that: The sealing assembly includes a wiring harness plate, a conductive bar and an output pole; the conductive bar is integrated inside the wiring harness plate; the conductive bar has an electrical connection portion electrically connected to the bare battery cell, and a avoidance groove is provided on the wiring harness plate to allow the electrical connection portion to be exposed from the avoidance groove, and the electrical connection portion is welded and connected to the pole of the bare battery cell; the conductive bar is electrically connected to the output pole, and the output pole is provided on one side of the wiring harness plate for outputting electrical energy.

8. The battery module according to claim 7, characterized in that: A plurality of positioning structures are arranged on one side of the wiring harness plate close to the bare battery cell. The positioning structures form a limiting groove, and the top of the bare battery cell is inserted into the limiting groove.

9. The battery module according to any one of claims 1 to 3, characterized in that: The battery module further includes a second sealing gasket, which is pressed between the sealing assembly and the frame.

10. A battery pack, characterized in that: Comprising a battery module as described in any one of claims 1-9.

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