Pouch battery module and battery pack

Abstract

The embodiment of the present application provides a soft package battery module and a battery pack, the soft package battery module comprises a frame body, a connecting support and a battery cell assembly; wherein the battery cell assembly comprises a plurality of battery cell units which are stacked in sequence and are connected by bonding between two adjacent battery cell units; the battery cell unit comprises a heat conduction plate and a soft package battery cell bonded on the heat conduction plate, the heat conduction plate is a flat plate structure, one end of the heat conduction plate is connected with the connecting support, and the other end of the heat conduction plate is connected with the frame body; the frame body surrounds the battery cell assembly and forms two oppositely arranged open ports, one of the open ports is provided with a support for supporting the battery cell assembly; the connecting support is arranged at the other open port and is used for closing the open port, and the connecting support is connected with the frame body. Without setting a buckle structure on the heat conduction plate, the structure of the heat conduction plate is relatively simple, the processing difficulty is relatively small, and the manufacturing cost is relatively low.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and in particular to a soft-pack battery module and battery pack. Background Technology

[0002] In existing pouch cell modules, multiple heat-conducting plates are typically used. Each pair of adjacent heat-conducting plates is usually connected by clips to form a fixed space for securing a single pouch cell. After assembling multiple pouch cells into a pouch cell assembly, two side plates are used to fix it to both sides of the assembly, and two end plates are used to fix it to both ends. However, the structure of the heat-conducting plates is complex, difficult to process, and has high manufacturing costs. Summary of the Invention

[0003] In view of the above problems, embodiments of the present invention are proposed to provide a soft-pack battery module and battery pack that overcomes or at least partially solves the above problems.

[0004] To address the aforementioned problems, in a first aspect, embodiments of the present invention disclose a pouch battery module, comprising: a frame, a connecting support, and a battery cell assembly; wherein...

[0005] The battery cell assembly includes multiple battery cell units stacked sequentially, and adjacent battery cell units are bonded together.

[0006] The battery cell unit includes a heat-conducting plate and a soft-pack battery cell bonded to the heat-conducting plate. The heat-conducting plate has a flat plate structure. One end of the heat-conducting plate is connected to the connecting support, and the other end of the heat-conducting plate is connected to the frame.

[0007] The frame surrounds the battery cell assembly and forms two oppositely arranged square openings, one of which is provided with a support member that supports part of the battery cell assembly;

[0008] The connecting support is located at another of the openings and is used to close the opening; the connecting support is fixedly connected to the frame.

[0009] Optionally, the connecting support is provided with at least two spaced limiting members on the side facing the heat-conducting plate, and a first gap for placing the soft-pack battery cell is formed between each pair of adjacent limiting members.

[0010] The limiting member has a limiting groove for embedding the heat-conducting plate on the side opposite to the heat-conducting plate.

[0011] Optionally, the width of the limiting groove is greater than the thickness of the heat-conducting plate.

[0012] Optionally, the number of connecting supports is at least two; at least two connecting supports are arranged at intervals along the length direction of the frame.

[0013] A second gap is formed between two adjacent connecting supports to accommodate the pouch cell.

[0014] Optionally, the pouch cell includes: a first tab led out from the positive electrode and a second tab led out from the negative electrode;

[0015] The support body is provided with corresponding through holes for inserting the first electrode lug and the second electrode lug.

[0016] Optionally, the frame includes two side plates and two end plates arranged opposite to each other, the two end plates being respectively disposed between the two side plates, and the two side plates and the two end plates surrounding the battery cell assembly;

[0017] The side plate is fixedly connected to the support member.

[0018] Optionally, the two side plates include a first side plate and a second side plate, and the support member includes a first support member and a second support member; the first support member extends along the bottom of the first side plate to the second side plate, and the second support member extends along the bottom of the second side plate to the first side plate.

[0019] Optionally, the first support member and the first side plate are integrally formed, and the second support member and the second side plate are integrally formed.

[0020] Optionally, the top of the side plate is provided with a third folded edge, which is opposite to the support member;

[0021] The connecting support is provided with a limiting part at the position opposite to the third folded edge. The limiting part includes a first limiting surface and a second limiting surface. The first limiting surface is opposite to the third folded edge, and the second limiting surface extends away from the heat-conducting plate along the first limiting surface.

[0022] The third folded edge is connected to the first limiting surface and the second limiting surface, respectively.

[0023] Optionally, the connecting support includes a support body and two connecting plates, the two connecting plates being perpendicularly connected to both ends of the support body;

[0024] The two connecting plates are respectively connected to the two side walls opposite to the frame.

[0025] Optionally, the other end of the heat-conducting plate protrudes from the end of the soft-pack battery cell away from the connecting support.

[0026] Secondly, embodiments of the present invention also disclose a battery pack, including the aforementioned soft-pack battery module.

[0027] Optionally, the battery pack includes a base plate;

[0028] The cell assembly of the soft-pack battery module is fixed to the base plate by thermally conductive adhesive.

[0029] Optionally, the base plate includes a water-cooled plate and a water-cooled channel formed by the water-cooled plate;

[0030] The battery cell assembly is fixed to the water-cooling plate by the thermally conductive adhesive.

[0031] The embodiments of the present invention have the following advantages:

[0032] In this embodiment of the invention, multiple battery cells are stacked sequentially to form a battery cell assembly, and the frame surrounds the battery cell assembly, allowing the frame to horizontally limit the movement of the multiple battery cells. The connecting support is connected to the frame, one end of the heat-conducting plate is connected to the connecting support, and the other end of the heat-conducting plate is connected to the frame. Thus, under the combined action of the connecting support and the frame, the multiple battery cells can also be vertically limited, making the structure of the soft-pack battery module more stable. The soft-pack battery cells can be fixed to the heat-conducting plate by adhesive bonding. The heat-conducting plate has a flat structure, eliminating the need for clips, making the structure of the heat-conducting plate simpler, easier to process, and lower in manufacturing cost. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the disassembled structure of a soft-pack battery module according to the present invention;

[0034] Figure 2 This is a schematic diagram of the structure of a soft-pack battery module according to the present invention;

[0035] Figure 3 This is a schematic diagram of the structure of a heat-conducting plate according to the present invention;

[0036] Figure 4 This is a schematic diagram of the structure of a connecting support according to the present invention;

[0037] Figure 5 This is a schematic diagram of another connecting support structure of the present invention;

[0038] Figure 6 This is a schematic diagram of the structure of a frame according to the present invention;

[0039] Figure 7 This is a partial cross-sectional structural diagram of a soft-pack battery module according to the present invention;

[0040] Figure 8 This is a partial cross-sectional structural diagram of another soft-pack battery module of the present invention;

[0041] Figure 9 This is a partial cross-sectional structural diagram of another soft-pack battery module of the present invention;

[0042] Figure 10 This is a schematic diagram of the structure of a pouch cell according to the present invention.

[0043] Figure label:

[0044] 1-Frame, 11-Side plate, 111-First folded edge, 113-Third folded edge, 12-End plate, 2-Connecting support, 21-Support body, 211-Through hole, 212-Limiting part, 2121-First limiting surface, 2122-Second limiting surface, 22-Connecting plate, 23-Limiting component, 231-Limiting groove, 232-Allowing hole, 300-Cell assembly, 3-Cell unit, 31-Soft-pack cell, 311-First tab, 312-Second tab, 32-Heat-conducting plate, 41-Insulation layer, 42-Buffer layer, 43-Buffer insulation layer, 5-Base plate, 6-Protective cover, 7-Flexible circuit board, 8-Protective bracket, 9-Battery information acquisition board. Detailed Implementation

[0045] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] The terms "first" and "second" in the specification and claims of this invention may explicitly or implicitly include one or more of those features. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0047] In the description of this invention, it should be understood that the terms "length", "width", "thickness", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0048] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0049] One of the core concepts of this invention is to provide a soft-pack battery module.

[0050] Reference Figure 1 The diagram shows a split structure schematic of a soft-pack battery module according to the present invention. Figure 2 The diagram shows a structural schematic of a soft-pack battery module according to the present invention. Figure 1 and 2 As shown, the soft-pack battery module may specifically include: a frame 1, a connecting support 2, and a cell assembly 300; wherein, the cell assembly 300 includes a plurality of sequentially stacked cell units 3, and adjacent cell units 3 can be bonded together; the cell unit 3 may include a heat-conducting plate 32 and a soft-pack cell 31 bonded to the heat-conducting plate 32, such as Figure 3 As shown, the heat-conducting plate 32 can be a flat plate structure. One end of the heat-conducting plate 32 can be connected to the connecting support 2, and the other end of the heat-conducting plate 32 can be connected to the frame 1. The frame 1 can surround the battery cell assembly 300 and can form two open openings that are arranged opposite to each other. One of the open openings can be provided with a support member that supports part of the battery cell assembly 300. The connecting support 2 is located at the other open opening and is used to close the open opening. The connecting support 2 is fixedly connected to the frame 1.

[0051] In this embodiment of the invention, multiple battery cell units 3 are stacked sequentially to form a battery cell assembly 300, and the frame 1 can surround the battery cell assembly 300, so that the frame 1 can limit the multiple battery cell units 3 in the horizontal plane. The connecting support 2 is fixedly connected to the frame 1, one end of the heat-conducting plate 32 is connected to the connecting support 2, and the other end of the heat-conducting plate 32 is connected to the frame 1. In this way, under the joint action of the connecting support 2 and the frame 1, the multiple battery cell units 3 can also be limited in the vertical direction, making the structure of the soft-pack battery module more stable. Among them, the soft-pack battery cell 31 can be fixed to the heat-conducting plate 32 by adhesive bonding. The heat-conducting plate 32 has a flat structure, and there is no need to set a buckle structure on the heat-conducting plate 32, making the structure of the heat-conducting plate 32 simpler, the processing difficulty less, and the manufacturing cost lower.

[0052] Specifically, multiple battery cell units 3 are stacked sequentially to form a battery cell assembly 300, and then a frame 1 can surround the battery cell assembly 300. In this way, the frame 1 can limit the multiple battery cell units 3 in both the length and width directions of the frame 1, such as... Figure 2 As shown, the length direction of frame 1 can be the X-axis direction, and the width direction of frame 1 can be the Y-axis direction.

[0053] Furthermore, adjacent battery cell units 3 can be bonded together. Within each battery cell unit 3, the pouch cell 31 and the heat-conducting plate 32 can be bonded together; specifically, the pouch cell 31 and the heat-conducting plate 32 can be fixed together using thermally conductive adhesive. This ensures a tight fit between the pouch cell 31 and the heat-conducting plate 32 for pouch cells 31 of different thicknesses. Consequently, when pressure is applied to the pouch cell 31 along the length of the frame 1, each pouch cell 31 experiences the same force, effectively guaranteeing the pouch battery module has excellent performance.

[0054] Specifically, each battery cell unit 3 may include one or two pouch cells 31. One pouch cell 31 may be bonded to one side of the heat-conducting plate 32, and two pouch cells 31 may be bonded to both sides of the heat-conducting plate 32 respectively.

[0055] Specifically, such as Figure 2 As shown, along Figure 2 The arrows in the diagram indicate the direction from the top to the bottom of frame 1. Frame 1 can have an opening at both the top and bottom, which can reduce the cost of using frame 1. A support member can be located at the bottom of frame 1 to support at least a portion of the battery cell assembly 300, and both ends of the connecting support 2 can be fixedly connected to the opposite side walls of frame 1. The connecting support 2 can be located at the top of frame 1 and used to close the opening at the top of frame 1.

[0056] Specifically, the connecting support 2 is fixedly connected to the frame 1, and one end of the heat-conducting plate 32 can pass through the opening and connect to the connecting support 2, while the other end of the heat-conducting plate 32 is connected to the frame 1. In this way, the connecting support 2 and the frame 1 can limit the movement of multiple battery cell units 3 along the height direction of the frame 1. Figure 2 As shown, the height direction of frame 1 can be the Z-axis direction.

[0057] Furthermore, the connecting support 2 can be bonded to the frame 1 with structural adhesive, or it can be bolted to the frame 1 with bolts. This embodiment of the invention does not specifically limit this.

[0058] Specifically, the heat-conducting plate 32 can be a metal plate with thermal conductivity, such as an aluminum plate or a copper plate. The soft-pack cell 31 can be a battery in which a polymer shell is wrapped around a liquid lithium-ion battery, and the structure is packaged with an aluminum-plastic film.

[0059] Specifically, the side of the battery cell unit 3 can be fixed to the inner wall of the frame 1 by structural adhesive, that is, the side of the heat-conducting plate 32 can be fixed to the inner wall of the frame 1 by structural adhesive, and / or, the side of the soft-pack battery cell 31 can be fixed to the inner wall of the frame 1 by structural adhesive.

[0060] In this embodiment of the invention, an insulating film may be covered on the outside of the heat-conducting plate 32 to isolate two adjacent soft-pack battery cells 31 and prevent short circuits in the battery cell unit 3. Figure 7 As shown, an insulating layer 41 can also be provided between two adjacent cell units 3 to isolate the two adjacent soft-pack cells 31 and prevent short circuits in the soft-pack battery module.

[0061] Specifically, multiple battery cell units 3 can be arranged sequentially along the length of the frame 1, thus realizing the arrangement of the soft-pack battery cell 31, heat-conducting plate 32, soft-pack battery cell 31, insulating layer 41, soft-pack battery cell 31, heat-conducting plate 32, and soft-pack battery cell 31.

[0062] In this embodiment of the invention, multiple battery cell units 3 are arranged sequentially along the length of the frame 1, and the soft-pack battery cell 31 and the heat-conducting plate 32 can also be arranged alternately.

[0063] like Figure 9 As shown, a buffer insulation layer 43 can be used instead of the insulation layer 41 between two adjacent cell units 3. The buffer insulation layer 43 can be an integrally formed structure. In this way, the buffer insulation layer 43 can not only isolate two adjacent soft-pack cells 31 to avoid short circuit in the soft-pack battery module, but also absorb the expansion force of the soft-pack cells 31.

[0064] like Figure 8 As shown, a buffer layer 42 and an insulating layer 41 can be simultaneously provided between two adjacent cell units 3. In this way, the buffer layer 42 can absorb the expansion force of the soft-pack cell 31, and the insulating layer 41 can isolate two adjacent soft-pack cells 31 to avoid short circuits in the soft-pack battery module.

[0065] Optionally, the connecting support 2 may include a support body 21 and two connecting plates 22. The two connecting plates 22 may be vertically connected to both ends of the support body 21 respectively. The two connecting plates 22 may be connected to the two side walls opposite to the frame 1 respectively.

[0066] In this embodiment of the invention, the two connecting plates 22 are respectively connected to the opposite side walls of the frame 1, thereby fixing the connecting support 2 to the frame 1. Moreover, since both ends of the connecting support 2 are connected to the opposite side walls of the frame 1 through the two connecting plates 22, both ends of the connecting support 2 are subjected to force, which can improve the stability of the fixing between the connecting support 2 and the frame 1.

[0067] Specifically, the connecting plate 22 can be fixedly connected to the frame 1 by adhesive or bolts.

[0068] Specifically, the connecting support 2 can be a plastic structural component, and the connecting plate 22 and the support body 21 can be an injection-molded integrated structure.

[0069] like Figure 4 and 5 As shown, the connecting support 2 may be provided with at least two spaced limiting members 23 on the side facing the heat conduction plate 32, and a first gap for placing the soft-pack battery cell 31 may be formed between each two adjacent limiting members 23; the limiting member 23 may be provided with a limiting groove 231 for embedding the heat conduction plate 32 on the side facing the heat conduction plate 32.

[0070] In this embodiment of the invention, at least two limiting members 23 are provided on the connecting support 2, and at least two heat-conducting plates 32 can be embedded therecorrespondingly, which can prevent the connecting support 2 from deflecting in the height direction of the frame 1 and facilitate the installation of the connecting support 2.

[0071] Specifically, the limiting member 23 can be provided on the support body 21 of the connecting support 2.

[0072] Optionally, the width of the limiting groove 231 can be greater than the thickness of the heat-conducting plate 32.

[0073] In this embodiment of the invention, the width of the limiting groove 231 is greater than the thickness of the heat-conducting plate 32. In this way, by adjusting the position of the heat-conducting plate 32 in the limiting groove 231, it can accommodate soft-pack battery cells 31 of different thicknesses.

[0074] Specifically, two adjacent heat-conducting plates 32 can be embedded in two adjacent limiting grooves 231. By adjusting the position of the heat-conducting plates 32 in the limiting grooves 231, the first gap between the two adjacent heat-conducting plates 32 can be adjusted. The first gap can be adapted to the thickness of the soft-pack battery cell 31 between the two heat-conducting plates 32.

[0075] Optionally, the number of connecting supports 2 can be at least two; at least two connecting supports 2 can be arranged sequentially at intervals along the length direction of the frame 1; wherein, a second gap for accommodating the soft-pack battery cell 31 can be formed between two adjacent connecting supports 2.

[0076] In this embodiment of the invention, the number of connecting supports 2 is at least two, and there is a second gap between two adjacent connecting supports 2 to accommodate the pouch cell 31. Thus, by adjusting the distance between two adjacent connecting supports 2, pouch cells 31 of different thicknesses can be accommodated.

[0077] Specifically, adjusting the distance between two adjacent connecting supports 2 can adjust the distance between two adjacent limiting grooves 231, thereby adjusting the first gap between two adjacent heat-conducting plates 32.

[0078] Specifically, the number of connecting supports 2 can be two, three, eight or more, depending on actual needs.

[0079] like Figure 1 As shown, there are multiple connecting supports 2, and each connecting support 2 can be provided with two limiting members 23, so that it can cooperate with two adjacent heat conduction plates 32. Other situations can be set accordingly.

[0080] like Figure 10 As shown, the soft-pack battery cell 31 may include a first tab 311 led out from the positive electrode and a second tab 312 led out from the negative electrode; the support body 21 may be provided with corresponding through holes 211 for passing through the first tab 311 and the second tab 312.

[0081] In this embodiment of the invention, the first tab 311 and the second tab 312 of the soft-pack battery cell 31 can pass through the through hole 211 to facilitate the connection between multiple battery cell units 3.

[0082] In one embodiment of the invention, a through hole 211 may simultaneously pass through one first electrode tab 311 and one second electrode tab 312, or simultaneously pass through two first electrode tabs 311, or simultaneously pass through two second electrode tabs 312. A through hole 211 may also pass through only one first electrode tab 311 or one second electrode tab 312.

[0083] Specifically, in two adjacent pouch cells 31, the first tab 311 of one pouch cell 31 and the second tab 312 of the other pouch cell 31 can pass through the same through hole 211, so as to achieve a series connection between the two adjacent pouch cells 31. Alternatively, in two adjacent pouch cells 31, the first tab 311 of one pouch cell 31 and the first tab 311 of the other pouch cell 31 can pass through the same through hole 211, so as to achieve a parallel connection between the two adjacent pouch cells 31.

[0084] Specifically, in two adjacent pouch cells 31, the first tab 311 of one pouch cell 31 and the second tab 312 of the other pouch cell 31 can be connected by welding. During the welding process, the welding fixture can easily put pressure on the first tab 311 of one pouch cell 31 and the second tab 312 of the other pouch cell 31, while the support body 21 can provide effective support.

[0085] like Figure 5 As shown, the support body 21 may include a support surface 213 so that the first electrode 311 and the second electrode 312 can be bent and welded together on the support surface 213 after passing through the through hole 211.

[0086] Specifically, the pouch battery module may further include a flexible circuit board 7, which may be disposed on the side of the connecting support 2 away from the frame 1; the first tab 311 and the second tab 312 of the pouch cell 31 may both be electrically connected to the flexible circuit board 7. Figure 5 As shown, the limiting member 23 may be provided with a clearance hole 232 so that the first tab 311 and the second tab 312 of the soft-pack battery cell 31 can pass through the clearance hole 232 and connect to the flexible circuit board 7.

[0087] Specifically, the support body 21 can be provided with through holes 211 at both ends along its length direction, and the length direction of the flexible circuit board 7 can be perpendicular to the length direction of the support body 21; the flexible circuit board 7 can be connected to the support surface 213 of the support body 21, and the through holes 211 can be arranged on both sides of the flexible circuit board 7.

[0088] Furthermore, such as Figure 1 As shown, the soft-pack battery module may also include a protective bracket 8; the protective bracket 8 may be connected to the frame 1 to enclose the connecting support 2 and multiple battery cell units 3 inside the frame 1 to protect the connecting support 2 and the battery cell units 3.

[0089] Specifically, the soft-pack battery module may further include a protective cover 6 and a battery information acquisition board 9. The protective bracket 8 may have a through hole. The battery information acquisition board 9 may be located on the side of the protective bracket 8 away from the connecting support 2. The battery information acquisition board 9 may be connected to the flexible circuit board 7 through a connector, which may pass through the through hole. The protective cover 6 and the protective bracket 8 may be fastened together to form a cavity for accommodating the battery information acquisition board 9. The protective cover 6 may be used to protect the battery information acquisition board 9.

[0090] Specifically, both the protective bracket 8 and the protective cover 6 can be plastic structural components.

[0091] Optionally, the frame 1 may include two side plates 11 and two end plates 12 arranged opposite to each other. The two end plates 12 may be respectively disposed between the two side plates 11. The two side plates 11 and the two end plates 12 may surround the cell assembly 300. The side plates 11 may be fixedly connected to the support member.

[0092] In this embodiment of the invention, two side plates 11 can be disposed on both sides of the battery cell assembly 300, and two end plates 12 can be disposed at both ends of the battery cell assembly 300, so as to surround the battery cell assembly 300.

[0093] Specifically, the side plate 11 may be provided with a first folded edge 111 and a second folded edge 112 at both ends along the length of the frame 1, and the first folded edge 111 and the second folded edge 112 may be opposite to each other; the side of the first folded edge 111 facing the second folded edge 112 is fixedly connected to one of the end plates 12, and the side of the second folded edge 112 facing the first folded edge 111 is fixedly connected to the other end plate 12.

[0094] Specifically, the assembly process of the pouch battery module may include the following steps:

[0095] Step 1: Attach the soft-pack battery cell 31 to the side of the heat-conducting plate 32 to form the soft-pack unit 3.

[0096] Step 2: Stack multiple battery cell units 3 sequentially to form a battery cell assembly 300.

[0097] Step 3: Use two end plates 12 to surround the cell assembly 300 from both ends.

[0098] Step 4: Connect the limiting groove 231 on the limiting member 23 of the connecting support 2 to the heat conduction plate 32.

[0099] Step 5: Use two side plates 11 to surround the battery cell assembly 300 from both sides, and fix the side of the battery cell unit 3 to the inner wall of the side plate 11. Fix the connecting plates 22 at both ends of the connecting support 2 to the inner wall of the side plate 11. Fix the first folded edge 111 and the second folded edge 112 of the side plate 11 to the two end plates 12 respectively.

[0100] In this embodiment of the invention, the side of the first folded edge 111 facing the second folded edge 112 is fixedly connected to one of the end plates 12, and the side of the second folded edge 112 facing the first folded edge 111 is fixedly connected to the other end plate 12, so that the side plate 11 can be fixedly connected to the two end plates 12 respectively.

[0101] like Figure 6As shown, the first folded edge 111 can be bent toward the adjacent end plate 12, and the second folded edge 112 can be bent toward the adjacent end plate 12. Both the first folded edge 111 and the second folded edge 112 can be bent 90° along the side plate 11, and the bending directions of the first folded edge 111 and the second folded edge 112 can be the same.

[0102] Specifically, the first folded edge 111 can be connected to the adjacent end plate 12 by various methods such as screw connection, riveting, and welding to achieve a fixed connection between the first folded edge 111 and the end plate 12. The second folded edge 112 can be connected to the adjacent end plate 12 by various methods such as screw connection, riveting, and welding to achieve a fixed connection between the second folded edge 112 and the end plate 12.

[0103] Specifically, multiple battery cell units 3 can be arranged within the accommodating space formed by the side plates 11 and the end plates 12. In this way, the two end plates 12 can limit the multiple battery cell units 3 in the X-axis direction, and the two side plates 11 can limit the multiple battery cell units 3 in the Y-axis direction.

[0104] Specifically, the side plate 11 and the end plate 12 can surround the circumference of the cell unit 3, which can effectively resist the expansion force of the soft-pack cell 31 and ensure the structural reliability of the soft-pack battery module.

[0105] Specifically, the support member can be fixedly connected to the side plate 11 so that the support member can support at least part of the cell assembly.

[0106] In one embodiment of the present invention, the support member may also be fixedly connected to the end plate 12, or the support member may be integrally formed with the end plate 12. The present invention does not specifically limit this.

[0107] Specifically, the support member can extend along one end plate 12 to the other end plate 12, and the two end plates 12 can be connected to the two support members respectively. The two support members are spaced apart to form an open opening at the bottom of the frame 1.

[0108] Optionally, the two side plates 11 include a first side plate and a second side plate, and the support members include a first support member and a second support member; the first support member can extend along the bottom of the first side plate to the second side plate, and the second support member can extend along the bottom of the second side plate to the first side plate.

[0109] In this embodiment of the invention, a first support member extends from the bottom of the first side plate to the second side plate to facilitate support of at least a portion of the battery cell assembly 300; a second support member extends from the bottom of the second side plate to the first side plate to facilitate support of at least a portion of the battery cell assembly 300. The first and second support members can support the battery cell assembly 300 from both sides, which can improve the stability of the fixation between the frame 1 and the battery cell assembly 300.

[0110] Specifically, the spacing between the first support member and the second support member can form an open opening at the bottom of the frame 1, which can further reduce the cost of the frame 1.

[0111] Specifically, the first support member and the first side plate can be integrally formed, or they can be fixed together by bonding or bolting. The second support member and the second side plate can also be integrally formed, or they can be fixed together by bonding or bolting.

[0112] Optionally, the first support member and the first side plate can be integrally formed, and the second support member and the second side plate can be integrally formed.

[0113] In this embodiment of the invention, the first support member and the first side plate are integrally formed, which can improve the stability of the connection between the first support member and the first side plate. The second support member and the second side plate are integrally formed, which can improve the stability of the connection between the second support member and the second side plate.

[0114] Optionally, the top of the side plate 11 may be provided with a third folded edge 113, which may be opposite to the support member; the connecting support 2 may be provided with a limiting part 212 at the position opposite to the third folded edge 113, and the limiting part 212 may include: a first limiting surface 2121 and a second limiting surface 2122, the first limiting surface 2121 may be opposite to the third folded edge 113, and the second limiting surface 2122 may extend away from the heat-conducting plate along the first limiting surface 2121; the third folded edge 113 may be connected to the first limiting surface 2121 and the second limiting surface 2122 respectively.

[0115] In this embodiment of the invention, the third folded edge 113 is connected to the first limiting surface 2121 and the second limiting surface 2122 respectively, which can further ensure that the heat-conducting plate 32 is limited in the height direction of the frame 1.

[0116] Specifically, the third folded edge 113 connects to the first limiting surface 2121, enabling the connection support 2 and the frame 1 to be fixed in the Z-axis direction. The third folded edge 113 connects to the second limiting surface 2122, enabling the connection support 2 and the frame 1 to be fixed in the X-axis direction. The first limiting surface 2121 and the second limiting surface 2122 are arranged perpendicularly, allowing the limiting part 212 to form an "L"-shaped structure, such as... Figure 5 As shown, the limiting part 212 can be an "L"-shaped stepped structure.

[0117] Specifically, the limiting part 212 can be provided at both ends of the connecting support 2 along the width direction of the frame 1. By limiting the connection between the limiting part 212 and the third folded edge 113, the convenience and stability of fixing the connecting support 2 to the side plate 11 can be improved.

[0118] Optionally, the other end of the heat-conducting plate 32 may protrude from the end of the soft-pack battery cell 31 away from the connecting support 2.

[0119] In this embodiment of the invention, the other end of the heat-conducting plate 32 protrudes from the end of the soft-pack battery cell 31 away from the connecting support 2, which can reduce the risk of the heat-conducting plate 32 puncturing the battery cell casing.

[0120] Specifically, the other end of the heat-conducting plate 32 can be the bottom of the heat-conducting plate 32, the end of the soft-pack battery cell 31 away from the connecting support 2 can be the bottom of the soft-pack battery cell 31, and the length of the bottom of the heat-conducting plate 32 protruding from the bottom of the soft-pack battery cell 31 can be 0-5 mm.

[0121] The soft-pack battery module described in this embodiment of the invention has at least the following advantages:

[0122] In this embodiment of the invention, multiple battery cells are stacked sequentially to form a battery cell assembly, and the frame surrounds the battery cell assembly, allowing the frame to horizontally limit the movement of the multiple battery cells. The connecting support is connected to the frame, one end of the heat-conducting plate is connected to the connecting support, and the other end of the heat-conducting plate is connected to the frame. Thus, under the combined action of the connecting support and the frame, the multiple battery cells can also be vertically limited, making the structure of the soft-pack battery module more stable. The soft-pack battery cells can be fixed to the heat-conducting plate by adhesive bonding. The heat-conducting plate has a flat structure, eliminating the need for clips, making the structure of the heat-conducting plate simpler, easier to process, and lower in manufacturing cost.

[0123] Secondly, embodiments of the present invention also disclose a battery pack, which may include the above-mentioned soft-pack battery module.

[0124] Optionally, the battery pack may include a base plate 5; the cell assembly 300 of the pouch battery module may be fixed to the base plate 5 with thermally conductive adhesive.

[0125] In this embodiment of the invention, the cell assembly 300 of the soft-pack battery module can be fixed to the base plate 5 by thermally conductive adhesive, so that the cell assembly 300 can transfer heat to the base plate 5 through the thermally conductive adhesive for heat dissipation.

[0126] Optionally, the base plate 5 may include a water-cooled plate and a water-cooled channel formed by the water-cooled plate; the battery cell assembly 300 may be fixed to the water-cooled plate by thermally conductive adhesive.

[0127] In this embodiment of the invention, the heat generated by the battery cell assembly 300 can be transferred to the water-cooling plate through the thermally conductive adhesive, and then cooled by the coolant in the water-cooling channel, which can effectively dissipate heat from the battery cell assembly 300.

[0128] Specifically, the base plate 5 can be set at the bottom of the frame 1 of the soft-pack battery module. The cell assembly 300 can include multiple cell units 3. Each cell unit 3 includes a heat-conducting plate 32 and a soft-pack cell 31. Both the heat-conducting plate 32 and the soft-pack cell 31 can be fixed to the water-cooling plate by thermally conductive adhesive.

[0129] Furthermore, the pouch cell 31 can transfer heat to the heat-conducting plate 32, which can then transfer the heat to the water-cooling plate via thermally conductive adhesive, where it is cooled by the coolant in the water-cooling channel. Alternatively, the pouch cell 31 can directly transfer heat to the water-cooling plate via thermally conductive adhesive, where it is cooled by the coolant in the water-cooling channel.

[0130] Specifically, the bottom of the heat-conducting plate 32 protrudes from the bottom of the soft-pack battery cell 31, which can increase the contact area between the heat-conducting plate 32 and the thermally conductive adhesive, and further improve the heat dissipation capacity of the soft-pack battery cell 31.

[0131] The battery pack described in the embodiments of the present invention has at least the following advantages:

[0132] In this embodiment of the invention, multiple battery cells are stacked sequentially to form a battery cell assembly, and the frame surrounds the battery cell assembly, allowing the frame to horizontally limit the movement of the multiple battery cells. The connecting support is connected to the frame, one end of the heat-conducting plate is connected to the connecting support, and the other end of the heat-conducting plate is connected to the frame. Thus, under the combined action of the connecting support and the frame, the multiple battery cells can also be vertically limited, making the structure of the soft-pack battery module more stable. The soft-pack battery cells can be fixed to the heat-conducting plate by adhesive bonding. The heat-conducting plate has a flat structure, eliminating the need for clips, making the structure of the heat-conducting plate simpler, easier to process, and lower in manufacturing cost.

[0133] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0134] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of the present invention.

[0135] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0136] The above provides a detailed description of a soft-pack battery module and battery pack provided by the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A soft-pack battery module, characterized in that, include: The frame, connecting brackets, and battery cell assembly; among them, The battery cell assembly includes multiple battery cell units stacked sequentially, and adjacent battery cell units are bonded together. The battery cell unit includes a heat-conducting plate and a soft-pack battery cell bonded to the heat-conducting plate. The heat-conducting plate has a flat plate structure. One end of the heat-conducting plate is connected to the connecting support, and the other end of the heat-conducting plate is connected to the frame. The frame surrounds the battery cell assembly and forms two openings that are arranged opposite to each other. One of the openings is provided with a support member that supports part of the battery cell assembly. The connecting support is located at another of the openings and is used to close the opening; the connecting support is connected to the frame. The connecting support is provided with at least two spaced limiting members on the side facing the heat-conducting plate, and a first gap for placing the soft-pack battery cell is formed between each pair of adjacent limiting members. The limiting member has a limiting groove for embedding the heat-conducting plate on the side facing the heat-conducting plate, and the size of the first gap is determined by adjusting the position of the heat-conducting plate in the limiting groove.

2. The soft-pack battery module according to claim 1, characterized in that, The width of the limiting groove is greater than the thickness of the heat-conducting plate.

3. The soft-pack battery module according to claim 1, characterized in that, The number of connecting supports is at least two; At least two of the connecting supports are arranged at intervals along the length of the frame; A second gap is formed between two adjacent connecting supports to accommodate the pouch cell.

4. The soft-pack battery module according to claim 1, characterized in that, The pouch cell includes: a first tab led out from the positive terminal and a second tab led out from the negative terminal; The connecting support is provided with corresponding through holes for the first electrode tab and the second electrode tab to pass through.

5. The soft-pack battery module according to claim 1, characterized in that, The frame includes two side plates and two end plates arranged opposite to each other, the two end plates being respectively disposed between the two side plates, and the two side plates and the two end plates surrounding the battery cell assembly; The side plate is fixedly connected to the support member.

6. The soft-pack battery module according to claim 5, characterized in that, The two side plates include a first side plate and a second side plate, and the support member includes a first support member and a second support member; The first support extends along the bottom of the first side plate toward the second side plate, and the second support extends along the bottom of the second side plate toward the first side plate.

7. The soft-pack battery module according to claim 6, characterized in that, The first support member and the first side plate are integrally formed, and the second support member and the second side plate are integrally formed.

8. The soft-pack battery module according to claim 5, characterized in that, The top of the side plate is provided with a third folded edge, which is opposite to the support member; The connecting support is provided with a limiting part at the position opposite to the third folded edge. The limiting part includes: a first limiting surface and a second limiting surface. The first limiting surface is opposite to the third folded edge, and the second limiting surface extends away from the heat-conducting plate along the first limiting surface. The third folded edge is connected to the first limiting surface and the second limiting surface, respectively.

9. The soft-pack battery module according to claim 1, characterized in that, The connecting support includes a support body and two connecting plates, which are respectively perpendicularly connected to both ends of the support body; The two connecting plates are respectively connected to the two opposite side walls of the frame.

10. The soft-pack battery module according to claim 1, characterized in that, The other end of the heat-conducting plate protrudes from the end of the soft-pack battery cell that is away from the connecting support.

11. A battery pack, characterized in that, Includes the soft-pack battery module as described in any one of claims 1-10.

12. The battery pack according to claim 11, characterized in that, The battery pack includes a base plate; The cell assembly of the soft-pack battery module is fixed to the base plate by thermally conductive adhesive.

13. The battery pack according to claim 12, characterized in that, The base plate includes a water-cooled plate and a water-cooled channel formed by the water-cooled plate; The battery cell assembly is fixed to the water-cooling plate by the thermally conductive adhesive.

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