Battery module

Abstract

The application relates to the technical field of batteries, in particular to a battery module which comprises a shell, a battery cell assembly, a first supporting assembly, a circuit board and a stop member; wherein the battery cell assembly, the first supporting assembly, the circuit board and the stop member are arranged in the shell. The application provides a battery module, a stop member is arranged at the top of the integrated body of the battery cell, the supporting member and the circuit board, so that the battery cell module can be limited, the battery cell, the supporting member and the circuit board and the like can be effectively prevented from moving along the up-down direction during use, the battery cell and electronic components thereof can be protected from being damaged, meanwhile, the insulating material on the circuit board can be prevented from being abraded and failed. In addition, two first supporting members are additionally arranged between the circuit board and the battery cell, so that the relative movement between the PCB and the battery pack is limited, and the tab is prevented from being pulled and torn. In addition, heat dissipation fins are arranged between the battery cell assemblies, so that the battery cells are cooled, and the heat dissipation fins occupy small space.

Description

Technical Field

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

[0002] Currently, lightweight power batteries are quite active in the market, mainly used in electric two-wheeled or three-wheeled vehicles. Application scenarios include electric motorcycles, electric tricycles, and smart battery swapping. Current lightweight power batteries consist of a casing and multiple battery cells, a circuit board, and a Battery Management System (BMS) module housed within the casing. The circuit board is located on top of the battery cell assembly, and the BMS module is integrated on its upper surface. To protect the BMS module, there is a gap between the casing's top cover and the BMS module. This gap creates a risk of movement between the battery cells and their top structure, potentially damaging the cells and other structures. Furthermore, movement can cause the insulating material protecting the tabs on the circuit board to come into contact with the top cover, leading to wear and failure, and potentially causing short circuits. Additionally, the circuit board and battery pack have soft contact; under certain impacts, they will experience relative displacement. Since the battery pack's mass is much greater than the PCB circuit board, the resulting acceleration can pull on the tabs soldered to the circuit board, causing damage and affecting normal battery charging and discharging. Utility Model Content

[0003] The purpose of this application is to provide a battery module that, to a certain extent, solves the technical problems existing in the prior art, such as the cell and electrical components on top of the lightweight power battery shaking, which may lead to damage to the aforementioned components, and may also cause the insulating material attached to the circuit board to protect the tabs to come into contact with the top cover and wear out, and under a certain impact, may pull on the tabs soldered to the circuit board, causing damage to the tabs.

[0004] This application provides a battery module, including: a housing, a cell assembly, a first support assembly, a circuit board, and a stop member; wherein, the cell assembly, the first support assembly, the circuit board, and the stop member are all disposed within the housing; the cell assembly includes a plurality of cells stacked sequentially along a first preset direction, and at least one end of each cell along its height direction is formed with a tab; the first support assembly includes two first support members, and the two first support members are disposed at the same end of the cell assembly where the tab is formed, and the two first support members are connected to each other;

[0005] Both of the first support members are formed with a plurality of first clearance through holes arranged sequentially along the first preset direction; the circuit board is disposed on the side of the two first support members away from the cell assembly, and the two first support members are supported between the circuit board and the cell assembly, and the electrode tab of the cell passes through the first clearance through holes and the through holes on the circuit board in sequence and bends on the circuit board.

[0006] Along the height direction of the battery cell, a stop member is provided between the end of the circuit board and the end of the housing, and the stop member is respectively disposed against the end of the circuit board and the end of the housing to press and limit the circuit board, the two first support members and the battery cell assembly.

[0007] Compared with the prior art, the beneficial effects of this application are as follows:

[0008] This application provides a battery module in which a stop member is provided on the top of the integrated body of the battery cell, support member and circuit board, thereby limiting the position of the battery cell module and effectively preventing the battery cell, support member and circuit board from moving up and down during use, protecting the battery cell and its electronic components from damage, and also preventing the problem of the insulating protective layer attached to the circuit board to protect the tabs from being worn and failing.

[0009] In addition, two first support components are added between the circuit board and the battery cell, which limits the relative movement between the PCB board and the battery pack and keeps the battery cell tabs in a taut state relative to the PCB board. This effectively avoids large relative movement between the battery cell tabs and the circuit board during battery module use, which could lead to problems such as tab tearing, and thus helps to extend the battery's lifespan.

[0010] In addition, heat sinks are inserted between the battery cell components to dissipate heat from the cells, ensuring the battery's performance and preventing accelerated aging, thus extending the battery's cycle life. Moreover, the heat sinks take up little space and do not affect the battery's capacity. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the battery module provided in an embodiment of this application;

[0013] Figure 2 An assembly diagram of the battery cell module and the stop component provided in an embodiment of this application;

[0014] Figure 3 A schematic diagram of the top structure of the battery cell module provided in an embodiment of this application;

[0015] Figure 4 Another structural schematic diagram of the top of the battery cell module provided in an embodiment of this application;

[0016] Figure 5 This is another assembly drawing of the battery cell module and the stop component provided in an embodiment of this application;

[0017] Figure 6 for Figure 5 A partially enlarged structural diagram;

[0018] Figure 7 Assembly drawings of the support members, circuit boards, and stop members provided in the embodiments of this application;

[0019] Figure 8 This is a schematic diagram of the structure of the stop member provided in the embodiments of this application;

[0020] Figure 9 This is another structural schematic diagram of the stop member provided in the embodiments of this application;

[0021] Figure 10 Another structural schematic diagram of the stop member provided in the embodiments of this application;

[0022] Figure 11 This is another structural schematic diagram of the stop member provided in the embodiments of this application.

[0023] Figure 12 Exploded views of the first and second support members provided in the embodiments of this application;

[0024] Figure 13 Assembly diagram of the first and second support members provided in the embodiments of this application;

[0025] Figure 14 A schematic diagram of the structure of a first support member provided in an embodiment of this application;

[0026] Figure 15 This is a structural schematic diagram of another first support member provided in an embodiment of this application;

[0027] Figure 16 A cross-sectional view of the first and second support members after assembly, provided for embodiments of this application;

[0028] Figure 17 This is a structural schematic diagram of the second support member provided in an embodiment of this application;

[0029] Figure 18 Another cross-sectional view of the first and second support members after assembly, provided for embodiments of this application;

[0030] Figure 19 An assembly diagram of the battery cell assembly, the first support member, the second support member, and the circuit board provided in the embodiments of this application;

[0031] Figure 20 for Figure 19 A partially enlarged structural diagram;

[0032] Figure 21 An assembly diagram of the battery cell assembly, the first support member, and the second support member provided in the embodiments of this application;

[0033] Figure 22 for Figure 21 A partially enlarged structural diagram;

[0034] Figure 23 This is a schematic diagram of the battery module provided in an embodiment of this application;

[0035] Figure 24 This is a schematic diagram of the structure of the heat sink provided in the embodiments of this application;

[0036] Figure 25 This is another schematic diagram of the structure of the heat sink provided in the embodiment of this application;

[0037] Figure 26 An assembly diagram of the battery cell and heat sink provided in an embodiment of this application;

[0038] Figure 27 This is another assembly drawing of the battery cell and heat sink provided in an embodiment of this application;

[0039] Figure 28 A cross-sectional view of the assembled battery cell and heat sink provided in an embodiment of this application;

[0040] Figure 29 for Figure 28 A partially enlarged structural diagram;

[0041] Figure 30 for Figure 28 Another enlarged schematic diagram of the structure;

[0042] Figure 31 Another assembly drawing of the battery cell and heat sink provided in an embodiment of this application;

[0043] Figure 32 Another assembly drawing of the battery cell and heat sink provided in an embodiment of this application;

[0044] Figure 33 Exploded views of the outer casing and isolation plate provided in the embodiments of this application;

[0045] Figure 34 A cross-sectional view of the assembly drawing of the outer shell and the isolation plate provided in the embodiments of this application;

[0046] Figure 35 This is a schematic diagram of the structure of the isolation plate provided in an embodiment of this application.

[0047] Figure label:

[0048] 1-Outer shell, 101-Lower shell, 102-Top cover, 2-Cell assembly, 21-Cell, 211-Electrical tab, 3-First support assembly, 31-First support member, 311-First clearance through hole, 312-First threaded hole, 313-Snap fastener, 314-Slot, 4-Second support assembly, 41-Second support member, 411-Second clearance through hole, 412-Second threaded hole, 5-Fastening member, 6-Circuit board, 7-Insulating protective layer, 8-Stop member, 81-Bottom plate, 82-Side plate, 83-Heat dissipation chamber, 84-Ventilation through hole, 85-Main clearance groove, 86-Clearing notch, 87-Auxiliary clearance groove, 9-Heat dissipation member, 91-Heat conductive part, 92-Heat dissipation part, 10-Battery management module, 11-Wire harness clip;

[0049] 12-Heat sink, 121-Body, 1211-Connecting plate, 1212-Protrusion, 1213-Recess, 122-Bending part, 1221-Side bending part, 1222-Bottom bending part, 13-Thermal conductive adhesive, 14-First flexible component, 15-Isolation plate, 151-Main body, 152-Flanged plate; a-First preset direction, b-Length direction of the battery cell, c-Height direction of the battery cell. Detailed Implementation

[0050] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this application, but not all embodiments.

[0051] The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of this application provided in the drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application.

[0052] Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0053] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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 application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0054] In the description of this application, it should be noted that, unless otherwise expressly 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0055] The following reference Figures 1 to 35 This application describes a battery module according to some embodiments.

[0056] See Figures 1 to 22 As shown, an embodiment of this application provides a battery module, including: a housing 1, a cell assembly 2, a first support assembly 3, a circuit board 6, and a stop member 8; wherein, the cell assembly 2, the first support assembly 3, the circuit board 6, and the stop member 8 are all disposed within the housing 1; the cell assembly 2 includes a plurality of cells 21 stacked sequentially along a first preset direction a, and at least one end of each cell 21 along its height direction is formed with a tab 211; the first support assembly 3 includes two first support members 31, and the two first support members 31 are disposed at the same end of the cell assembly 2 where the tab 211 is formed, and the two first support members 31 are connected to each other;

[0057] Both first support members 31 are formed with a plurality of first clearance through holes 311 arranged sequentially along the first preset direction a; the circuit board 6 is disposed on the side of the two first support members 31 away from the cell assembly 2, and the two first support members 31 are supported between the circuit board 6 and the cell assembly 2, and the tabs 211 of the cell 21 pass through the first clearance through holes 311 and through holes on the circuit board 6 in sequence and bend on the circuit board 6.

[0058] Along the height direction c of the battery cell, a stop member 8 is provided between the end of the circuit board 6 and the end of the housing 1, and the stop member 8 is respectively abutted against the end of the circuit board 6 and the end of the housing 1 to limit the circuit board 6, the two first support members 31 and the battery cell assembly 2.

[0059] As can be seen from the structure described above, this application provides a battery with a stop function. A stop member 8 is provided on the top of the integrated body of the cell 21, the first support member 31, the second support member 41 (described below), and the circuit board 6. This can limit the movement of the cell 21, the first support member 31, the second support member 41 (described below), and the circuit board 6 during use, thereby effectively preventing the cell 21, the first support member 31, the second support member 41 (described below), and the circuit board 6 from moving up and down during use, protecting the cell 21 and its electronic components from damage. At the same time, it can also prevent the insulating protective layer 7 attached to the circuit board 6 to protect the tab 211 from being worn and failing.

[0060] In addition, two first support members 31 are added between the circuit board 6 and the battery cell 21, thereby limiting the relative movement between the PCB board and the battery pack, and keeping the tabs 211 of the battery cell 21 in a taut state relative to the PCB board. This can effectively prevent large relative movement between the tabs 211 of the battery cell 21 and the circuit board 6 during the use of the battery module, which could lead to problems such as the tabs 211 tearing. This helps to extend the battery's service life.

[0061] Furthermore, preferably, along the height direction c of the battery cell, only the top end of the battery cell 21 has a tab 211, and the top tab 211 is provided with two first support members 31. Of course, it is not limited to this. Alternatively, along the height direction c of the battery cell, only the bottom end of the battery cell 21 has a tab 211, in which case the two first support members 31 are located at the bottom of the battery cell 21. Or, along the height direction c of the battery cell, both the top and bottom of the battery cell 21 have tabs 211, in which case both the top and bottom tabs 211 can be provided with two first support members 31, or two first support members 31 can be provided on either the top or bottom tabs 211, depending on the actual needs.

[0062] Furthermore, it should be noted that along the length direction b of the battery cell, the battery cell 21 is respectively formed with positive and negative tabs spaced apart, because in this application, two first support members 31 are provided together, and each of the first support members 31 is provided with a first clearance through hole 311 for clearance of the corresponding positive or negative tab.

[0063] In addition, it should be noted that: Figure 4 , Figures 19 to 22 The tab 211 in the middle is incomplete and does not include the bent structure, that is, it does not include the structure bent on the circuit board 6.

[0064] In addition, it should be noted that the height direction of the battery cell assembly 2 is the same as the height direction c of the battery cell.

[0065] Furthermore, preferably, after the tab 211 passes through the through hole on the circuit board 6 and bends onto the circuit board 6, an insulating protective layer 7 is provided on the upper part of the tab 211 to protect the tab 211, and the stop member 8 is pressed onto the insulating protective layer 7.

[0066] Furthermore, preferably, the first preset direction a is the width direction of the battery cell 21, that is, the thickness direction.

[0067] In this embodiment, preferably, as follows: Figures 24 to 32 As shown, the battery module also includes multiple heat sinks 12, which are inserted at different positions between the battery cell assemblies 2. Each heat sink 12 is in contact with the inner wall of the outer casing 1 and is used to conduct the heat generated by the battery cell 21 to the outer casing 1 for heat dissipation.

[0068] As can be seen from the structure described above, heat sinks 12 are inserted between the cell components 2 to dissipate heat from the cell 21, ensuring the working performance of the battery, without accelerating battery aging, extending the cycle life of the battery, and the heat sinks 12 occupy little space and will not affect the battery capacity.

[0069] In this embodiment, preferably, as follows: Figures 24 to 27 , Figures 31 to 32 As shown, the heat sink 12 includes a body 121 and a bent portion 122 connected to each other; wherein, the body 121 is inserted into the battery cell assembly 2, the bent portion 122 is bent relative to the body 121 and toward the side of the battery cell assembly 2 that is not provided with tabs 211, and the bent portion 122 is disposed against the inner wall of the outer casing 1.

[0070] As can be seen from the structure described above, the body 121 is attached to the large side of the battery cell 21, which can conduct a large amount of heat generated by the battery cell 21 to the bending part 122, and then conduct the heat to the outer shell 1 through the bending part 122, and finally dissipate the heat to the outside through the outer shell 1, thereby improving the cooling effect on the battery cell 21. Moreover, the bending part 122 is bent relative to the body 121 and towards the side of the battery cell assembly 2 that does not have the tabs 211, which can avoid interference with the tabs 211 and meet the assembly requirements. Of course, it is not limited to this and can be designed according to actual needs.

[0071] Furthermore, preferably, the body 121 is a rectangular plate, and the bent part 122 can also be a rectangular plate. Of course, it is not limited to this and can be selected according to actual needs.

[0072] Furthermore, preferably, the body 121 and the bending portion 122 are an integral structure. Of course, this is not the only option; other options can be selected according to actual needs.

[0073] Furthermore, preferably, along the first preset direction a, any two adjacent bends 122 do not overlap to avoid affecting heat dissipation. Of course, this is not the only option; along the first preset direction a, any two adjacent bends 122 may overlap, depending on the actual needs.

[0074] In addition, it should be noted that along the first preset direction a, any two adjacent bending portions 122 can be bent in the same direction or in opposite directions, depending on the actual needs.

[0075] In this embodiment, preferably, as follows: Figures 24 to 27 , Figure 31 and Figure 32 As shown, the bending portion 122 includes a side bending portion 1221 and a bottom bending portion 1222; wherein, the side bending portion 1221 abuts against the side wall of the outer casing 1, and the bottom bending portion 1222 abuts against the bottom wall of the outer casing 1.

[0076] As can be seen from the structure described above, this application designs a side bending portion 1221 and a bottom bending portion 1222, thereby achieving side heat dissipation and bottom heat dissipation, that is, multi-directional heat dissipation, which helps to improve the heat dissipation effect, thereby ensuring the battery's performance and improving the battery's lifespan. Moreover, no tabs 211 are provided on the side and bottom, so the aforementioned side bending portion 1221 and bottom bending portion 1222 will not interfere with the tabs 211.

[0077] It should be noted that: it is not limited to the situation where both the side bend 1221 and the bottom bend 1222 exist at the same time. It is also possible to set only the side bend 1221 or only the bottom bend 1222, depending on the actual needs.

[0078] Furthermore, preferably, there are two side-bending portions 1221, which are respectively disposed on opposite sides of the battery cell 21 along the length direction b of the battery cell.

[0079] As can be seen from the structure described above, side bending portions 1221 are provided on both the left and right sides of the battery cell 21 to increase the heat dissipation area and help improve the heat dissipation effect.

[0080] It should be noted that, not limited to the above, a bent portion 122 may also be provided only on one side of the main body 121, depending on the actual needs.

[0081] In this embodiment, preferably, as follows: Figure 24 and Figure 25As shown, the body 121 has a protrusion 1212 and a recess 1213, and the protrusion 1212 and the recess 1213 are arranged alternately along the height direction c of the battery cell. The body 121 can undergo elastic deformation under the pressure of two adjacent battery cells 21 so that the body 121 and the two battery cells 21 are tightly attached.

[0082] As can be seen from the structure described above, the heat sink 12 is provided with protrusions 1212 and recesses 1213. When the heat sink 12 is pressed by the battery cells 21 on the left and right sides, the heat sink 12 deforms, making it fit more tightly with the battery cells 21, which helps to improve the heat dissipation effect.

[0083] Further, preferably, the body 121 includes a connecting plate 1211 and a protrusion 1212 and a recess 1213 connected to the connecting plate 1211; wherein the connecting plate 1211 is disposed around the outer periphery of the protrusion 1212 and the recess 1213, and connects the protrusion 1212 and the recess 1213 together, and preferably, the connecting plate 1211, the protrusion 1212 and the recess 1213 are an integral structure.

[0084] It should be noted that the protrusion 1212 and the recess 1213 may not be provided on the main body 121, depending on the actual needs.

[0085] In this embodiment, preferably, as follows: Figure 30 As shown, thermally conductive adhesive 13 is filled between the bent portion 122 and the inner wall of the outer casing 1. In other words, in this state, the bent portion 122 and the outer casing 1 are in indirect contact.

[0086] As can be seen from the structure described above, the thermally conductive adhesive 13 serves both to fix the bent portion 122 to the outer shell 1 and to conduct heat.

[0087] It should be noted that thermally conductive adhesive 13 may not be provided between the bending part 122 and the outer shell 1. In other words, in this state, the bending part 122 and the outer shell 1 are in direct contact. The specific choice depends on the actual needs.

[0088] In this embodiment, preferably, as follows: Figure 26 , Figure 27 , Figures 30 to 32 As shown, the battery module also includes a first flexible member 14, which is disposed between the cell assembly 2 and the inner wall of the outer casing 1. The first flexible member 14 has an avoidance notch 86, and the bent portion 122 passes through the avoidance notch 86 and bends on the side of the first flexible member 14 near the inner wall of the outer casing 1.

[0089] As can be seen from the structure described above, the first flexible member 14 serves to buffer and absorb the expansion of the battery cell 21. An avoidance notch 86 is provided on the first flexible member 14 to avoid the bending part 122, so that the bending part 122 can bend after passing through the avoidance notch 86, thus avoiding interference.

[0090] Furthermore, preferably, the first flexible component 14 is foam. Of course, it is not limited to this and can be selected according to actual needs.

[0091] In this embodiment, preferably, as follows: Figures 26 to 28 As shown, along the first preset direction a, heat sinks 12 are provided between any two adjacent battery cells 21.

[0092] As can be seen from the structure described above, heat sinks 12 are installed between each pair of adjacent cells 21, which can dissipate heat from each cell 21, and thus achieve uniform heat dissipation for the entire cell assembly 2.

[0093] It should be noted that: not only along the first preset direction a as mentioned above, heat sinks 12 are provided between any two adjacent battery cells 21, but also every few battery cells 21 can be provided with a heat sink 12, or multiple heat sinks 12 can be randomly inserted into the battery cell assembly 2, with the position selected according to actual needs.

[0094] Furthermore, the number of heat sinks 12 is not limited to multiple; it can also be one, depending on the actual needs.

[0095] In this embodiment, preferably, the heat sink 12 is made of metal, that is, the heat sink 12 is a thin metal sheet. Metal has better thermal conductivity and is more suitable as the material for the heat sink 12. Of course, it is not limited to this. Other non-metallic heat dissipation materials can also be selected for the heat sink 12, depending on the actual needs.

[0096] Furthermore, preferably, the heat sink 12 is made of copper or aluminum, but of course, it is not limited to these.

[0097] In this embodiment, preferably, as follows: Figure 29 As shown, along the height direction c of the battery cell, the highest point of the top of the heat sink 12 is lower than the lowest point of the tab 211 at the top of the battery cell 21.

[0098] As can be seen from the structure described above, the highest point of the top of the heat sink 12 is lower than the lowest point of the top tab 211 of the battery cell 21. This avoids the metal heat sink 12 from being electrically connected to the tab 211, thus preventing a short circuit and making it safer and more reliable.

[0099] In this embodiment, preferably, as follows: Figures 2 to 7As shown, along the height direction c of the battery cell, the stop member 8 contacts the tab 211 of the battery cell 21; the stop member 8 has an opening facing the heat dissipation chamber 83 located away from the battery cell 21, and a vent hole 84 is formed on the side of the stop member 8 near the battery cell 21, and the vent hole 84 is connected to the heat dissipation chamber 83.

[0100] As can be seen from the structure described above, the stop member 8 forms a heat dissipation chamber 83. The heat generated at the tab 211 of the battery cell 21 during operation will enter the heat dissipation chamber 83 through the vent hole 84, and finally be dissipated to the outside through the outer shell 1. It can be seen that the aforementioned heat dissipation chamber 83 and vent hole 84 help to dissipate heat from the battery cell 21 and electronic components, ensure the performance of the battery, and help to extend the battery's lifespan. In addition, the aforementioned vent hole 84 can also reduce weight.

[0101] Furthermore, preferably, along the height direction c of the battery cell, a tab 211 is formed on the top of the battery cell 21, and no tab 211 is provided on the bottom of the battery cell 21. The circuit board 6 that cooperates with the tab 211 and the battery management module 10 that cooperates with the circuit board 6 are also integrated on the top of the battery cell 21. Therefore, the stop member 8 is set between the top of the battery cell module formed by the battery cell 21, the first support member 31, the second support member 41 (described below), the circuit board 6, and the battery management module 10 and the top of the outer shell 1, i.e., the top cover 102, to limit the battery cell 21, the first support member 31, the second support member 41 (described below), and the circuit board 6. This will be explained as an example later. In addition, since the tab 211 generates a lot of heat during operation, the aforementioned heat dissipation chamber 83 and vent hole 84 are opened on the stop member 8 to dissipate heat from the tab 211.

[0102] Of course, it is not limited to this. The tab 211 can be set only at the bottom of the cell 21. The circuit board 6 that cooperates with the tab 211 and the battery management module 10 that cooperates with the circuit board 6 are both integrated at the bottom of the cell 21. In this case, the stop member 8 is set between the bottom of the cell module and the bottom of the outer shell 1. Alternatively, the tab 211 can be set at both the top and bottom of the cell 21. In this case, the stop member 8 can be provided at both the top and bottom of the cell module. In addition, it should be noted that even if the tab 211 is set only at the top or bottom of the cell 21, the stop member 8 can be provided at both the top and bottom of the cell module. That is to say, the setting of the stop member 8 is not limited to the tab 211 and the circuit board 6. It can be selected according to the actual needs.

[0103] In this embodiment, preferably, as follows: Figure 2 , Figures 6 to 8 , Figure 10 and Figure 11As shown, the battery module also includes a heat dissipation component 9, which is fixed inside the heat dissipation chamber 83 and contacts the inner wall of the heat dissipation chamber 83 and the top or bottom of the outer casing 1. The heat dissipation component 9 is correspondingly arranged with the vent hole 84. It can be seen that the heat dissipation component 9 plays the role of quickly conducting heat to the outer casing 1, thereby accelerating heat dissipation.

[0104] Furthermore, preferably, the heat dissipation component 9 includes a heat dissipation part 92 and two heat-conducting parts 91 connected to the heat dissipation part 92; wherein, the two heat-conducting parts 91 are respectively disposed on opposite sides of the heat dissipation part 92; the heat-conducting parts 91 are connected to the inner wall of the heat dissipation chamber 83, and the heat dissipation part 92 abuts against the top or bottom of the outer shell 1.

[0105] As can be seen from the structure described above, the heat-conducting part 91 transfers the heat generated by the battery cell 21 to the heat dissipation part 92 above, and finally conducts it to the metal top cover through the heat dissipation part 92, and conducts the heat out to the outside. Moreover, the provision of two heat dissipation parts 92 in this application not only improves the efficiency of heat conduction, but also plays a role in stabilizing and supporting the heat dissipation part 92, making the overall structure of the heat dissipation component 9 more stable.

[0106] In this embodiment, preferably, the heat dissipation component 9 is made of a thermally conductive and insulating material, which ensures both insulation and thermal conductivity.

[0107] Furthermore, preferably, the heat dissipation component 9 can be made of a thermally conductive and insulating material.

[0108] In this embodiment, preferably, as follows: Figure 2 As shown, there are multiple ventilation holes 84, and along the height direction of the battery cell module, some ventilation holes 84 are set to correspond to some tabs 211. This helps to quickly dissipate the heat generated by the tabs 211 through the ventilation holes 84 into the heat dissipation chamber 83. Of course, due to the arrangement, other ventilation holes 84 are not set to correspond to the tabs 211.

[0109] It should be noted that: of course, it is not limited to this. All the ventilation holes 84 can also be set to correspond to the tabs 211. In addition, it should be noted that: the number of ventilation holes 84 is not limited to multiple, but can also be one. When the number of ventilation holes 84 is one, it can be set to correspond to the tabs 211 or not, depending on the actual needs.

[0110] In this embodiment, preferably, as follows: Figure 9 As shown, there are multiple air vents 84, which are arranged in a grid pattern.

[0111] As described above, the structure employs multiple ventilation holes 84 arranged in a grid pattern to improve the uniformity of heat dissipation. However, this is not the only option; the multiple ventilation holes 84 can be arranged arbitrarily according to actual needs. Furthermore, it should be noted that the number of ventilation holes 84 is not limited to multiple; it can also be a single hole, depending on the specific requirements.

[0112] In this embodiment, preferably, as follows: Figures 8 to 10 As shown, the stop member 8 is a box-shaped structure with its opening facing away from the battery cell 21, and the hollow part inside the box-shaped structure is a heat dissipation chamber 83.

[0113] As can be seen from the structure described above, the stop component 8 adopts a box-shaped structure, which is lightweight, which helps with lightweight design, and can also avoid excessive compression of the battery cell 21.

[0114] Furthermore, preferably, the stop member 8 includes a base plate 81 connected to each other and a plurality of side plates 82. The plurality of side plates 82 are arranged sequentially along the circumference of the base plate 81 and connected together to form a box structure. Preferably, it is an integral structure with high overall strength. Of course, it is not limited to this.

[0115] It should be noted that the stop component 8 is not limited to a box structure, but can also be other types of structures, depending on the actual needs.

[0116] In this embodiment, preferably, the heat dissipation component 9 is made of a thermally conductive and insulating material, which ensures both insulation and thermal conductivity.

[0117] Furthermore, preferably, the heat dissipation component 9 can be made of PBT material, but of course, it is not limited to this.

[0118] In this embodiment, preferably, as follows: Figure 9 As shown, the stop member 8 has a main clearance groove 85 and an auxiliary clearance groove 87 formed on the side near the cell 21. The battery module also includes a battery management module 10, which is disposed at the top or bottom of the cell 21 and located in the main clearance groove 85. The side wall of the main clearance groove 85 has a through clearance notch 86. The battery module also includes a wire harness clamp 11, which is disposed on the inner wall of the main clearance groove 85 and is used to clamp the wire harness.

[0119] As can be seen from the structure described above, a main clearance groove 85 is provided on the side of the stop member 8 near the cell module, which can then serve as a buffer for the battery management module 10. Preferably, the side wall of the main clearance groove 85 is also provided with a through clearance notch 86, which also serves to avoid components on the battery management module 10. The auxiliary clearance groove 87 is used to avoid interference with the circuit board 6 and / or other electrical components on the battery management module 10. It should be noted that the number and position of the auxiliary clearance grooves 87 can be selected according to actual needs. The wire harness clip 11 serves to hold the wire harness, preventing the wire harness from becoming tangled and effectively preventing the cable from shaking and wearing inside, thus avoiding poor insulation and other phenomena.

[0120] Furthermore, preferably, the wire harness clip 11 can be a C-shaped structure with a constricted opening. Of course, it is not limited to this and its structure can be designed according to actual needs.

[0121] In this embodiment, preferably, the stop member 8 is made of a thermally conductive and insulating material, which serves to provide insulation and heat conduction, preventing short circuits and making it safer and more reliable. Of course, it is not limited to this; the stop member 8 can also be made of metal, and an insulating layer can be provided on its outer layer, depending on the actual needs.

[0122] Furthermore, preferably, the stop member 8 is made of plastic material, such as thermally conductive PBT material.

[0123] In this embodiment, preferably, as follows: Figure 2 , Figure 3 , Figure 5 , Figure 12 , Figure 13 , Figures 19 to 22 As shown, the battery module also includes at least one second support component 4, and when there are multiple second support components 4, one of the second support components 4 is selected and installed on the first support component 3; each second support component 4 includes two second support members 41, and the two second support members 41 are disposed on the side of the two first support members 31 away from the cell assembly 2, and the two second support members 41 are connected to the corresponding two first support members 31 by fastening members 5 threaded connection;

[0124] Two second support members 41 abut against each other, and the two second support members 41 are supported between the circuit board 6 and the two first support members 31; each of the two first support members 31 has a plurality of second clearance through holes 411 arranged sequentially along the first preset direction a, and is used to lead out the tabs 211 of the battery cell 21.

[0125] As can be seen from the structure described above, in the actual assembly process, in order to facilitate the insertion of the first support member 31 and the second support member 41 into the tab 211 at the end of the battery cell 21, the thickness of both should be minimized. However, this may result in the two support members not being able to tighten the tab 211. If the second support member 41 and the corresponding first support member 31 are fastened together by the fastening member 5, the height of the second support member 41 and the first support member 31 can be adjusted so that the first support member 31 abuts against the end of the battery cell 21, the second support member 41 abuts against the circuit board 6, and the tab 211 is tightened relative to the circuit board 6. Of course, during installation, the first support member 31 can also be made to abut against the end of the battery cell 21 and kept stationary. The second support member 41 can be adjusted by the fastening member 5, such as screws or bolts, so that the tab 211 is tightened relative to the circuit board 6. The specific operation process can be selected according to actual needs.

[0126] As can be seen, the second support member 41 and the first support member 31 are detachably connected by the second fastening member 5, such as screws or bolts. This allows for adjustment of the connection positions of the first support member 31 and the second support member 41 with the fastening member 5. This satisfies the requirement that the tab 211 is in a taut state relative to the circuit board 6. It can also accommodate battery cells 21 with different tab 211 heights, i.e., it can accommodate different models of battery cells 21. Furthermore, it can avoid the problem of the tab 211 being too long (or too short) due to poor bending of the tab 211 during the manufacturing process, which would result in the distance between the PCB board and the base of the tab 211 being too large or too small.

[0127] In this embodiment, preferably, as follows: Figures 14 to 18 As shown, the first support member 31 has a first threaded hole 312, the second support member 41 has a second threaded hole 412, the fastening member 5 has an external thread, and the fastening member 5 is connected to the first threaded hole 312 and the second threaded hole 412 respectively by threads, and the connection position of the fastening member 5 with the first threaded hole 312 and the second threaded hole 412 can be adjusted.

[0128] As can be seen from the structure described above, both the first support member 31 and the second support member 41 are threadedly connected to the fastening member 5, which facilitates the adjustment of the position of the first support member 31 and the second support member 41 relative to the fastening member 5. This satisfies the requirement that the tab 211 is in a taut state relative to the circuit board 6, and can also accommodate battery cells 21 with different tab 211 heights, that is, accommodate different models of battery cells 21. Moreover, it can also avoid the problem of the tab 211 being too long (or too short) due to poor bending of the tab 211 during the manufacturing process, which would cause the distance between the PCB board and the base of the tab 211 to be too large or too small.

[0129] In this embodiment, preferably, there are multiple second support components 4, and the thickness of the second support member 41 in each second support component 4 is different along the height direction of the tab 211 of the cell 21. That is, along the height direction of the tab 211 of the cell 21, which is also the height direction c of the cell, the thickness of the second support member 41 in each group is different. It should be noted that the thickness of the two second support members 41 in each second support component 4 is the same.

[0130] As described above, the use of multiple sets of second support members 41 of different sizes allows for the adaptation of battery cells 21 with different tab heights 211, i.e., adaptability to different models of battery cells 21. It also avoids the problem of tabs 211 being too long (or too short) due to poor bending during manufacturing, which would result in an excessively large or small distance between the PCB board and the base of the tabs 211. Of course, this is not the only option; only one set of second support members 41 can be used. The design dimensions of the second support members 41 can be modified according to different usage requirements, as detailed in the specific description.

[0131] Furthermore, preferably, the two second support members 41 are separate structures, which facilitates assembly with the tab 211. Of course, it is not limited to this; the two second support members 41 can also be an integral structure, which can also meet the usage requirements.

[0132] It should be noted that in this embodiment, the first support member 31 and the second support member 41 coexist. Of course, it is not limited to this. In this embodiment, only the first support member 31 may be provided, that is, the second support member 41 does not need to be provided. The specific choice depends on the actual needs.

[0133] In this embodiment, preferably, both second support members 41 are made of plastic, which serves as insulation and protection.

[0134] Furthermore, preferably, the material of both second support members 41 can be PP or PVC. Of course, it is not limited to this and can be designed according to actual needs.

[0135] In this embodiment, preferably, as follows: Figure 14 , Figure 15 and Figure 16 As shown, the two first support members 31 are detachably connected by a snap fastener 313, or the two first support members 31 are an integral structure.

[0136] As can be seen from the structure described above, the two first support members 31 are engaged by the buckle 313 and the slot 314, which is a detachable connection method that is easy to install and disassemble. Moreover, the two first support members 31 adopt a split structure, which is convenient to assemble with the tab 211.

[0137] Furthermore, preferably, one of the two first support members 31 is formed with a buckle 313, and the other is formed with a groove 314, and the buckle 313 is engaged in the groove 314.

[0138] Furthermore, preferably, along the length direction b of the battery cell, the buckle 313 and the slot 314 are respectively formed at one end of the corresponding first support member 31 near the other first support member 31, but of course, it is not limited to this.

[0139] It should be noted that the connection method of the two first support members 31 is not limited to the above. The two can also adopt a detachable connection method such as bolts. Of course, it is not limited to this. The two first support members 31 can also be an integral structure, etc., depending on the actual needs.

[0140] In this embodiment, preferably, both first support members 31 are made of plastic, which serves as insulation and protection.

[0141] In this embodiment, preferably, as follows: Figures 33 to 35 As shown, the battery module also includes 15 isolation plates and end plates; wherein, along the first preset direction a, both ends of the cell assembly 2 are sequentially provided with end plates and 15 isolation plates, and the 15 isolation plates are disposed against the inner wall of the outer shell 1 to limit the cell assembly 2, while the end plates serve to protect the cell assembly 2.

[0142] As can be seen from the structure described above, the two isolation plates 15 on the front and rear sides of the battery cell assembly 2 can fix and constrain the battery cell assembly 2, thereby replacing the original potting method, reducing the cost of the entire product, and improving reliability.

[0143] In this embodiment, preferably, as follows: Figure 35 As shown, the isolation plate 15 includes a main body 151 and a plurality of flanges 152 connected to the main body 151; wherein, the plurality of flanges 152 are arranged sequentially along the circumference of the main body 151, and the ends of the plurality of flanges 152 away from the main body 151 are disposed against the inner sidewall of the outer casing 1.

[0144] As can be seen from the structure described above, the main board 151 cooperates with the end plate at the end of the battery cell assembly 2, resulting in a larger contact area and better positioning effect. The flange 152 abuts against the inner wall of the outer shell 1, playing a role in limiting and buffering. In this way, the main board 151 does not need to be designed to be thick, which saves materials.

[0145] Furthermore, preferably, the main body 151 and the flange 152 are an integral structure. Of course, it is not limited to this and can also be a separate structure, which can be assembled together later by welding or other connecting structures.

[0146] Furthermore, preferably, there are multiple flange plates 152, some of which are perpendicular to the main body 151, while others are L-shaped. A portion of the structure of one flange plate 152 is perpendicular to the main body 151, while another portion is parallel to the main body 151. Of course, this is not the only option; the shape of the flange plates 152 can be designed according to actual needs.

[0147] Furthermore, preferably, the connection between the flange plate 152 and the main body 151 is an arc-shaped transition connection to avoid sharp corners, but of course, it is not limited to this.

[0148] In this embodiment, preferably, the isolation plate 15 is a metal plate.

[0149] As can be seen from the structure described above, the metal isolation plate 15 has high strength and a certain buffering effect.

[0150] Furthermore, preferably, the metal isolation plate 15 can be welded to the inner wall of the outer shell 1 to fix and constrain the battery cell assembly 2, thereby replacing the original potting method, reducing the overall cost of the product, and improving reliability.

[0151] Furthermore, preferably, the end plate is made of an insulating material, such as PP material. Of course, it is not limited to this and can be selected according to actual needs.

[0152] In this embodiment, preferably, as follows: Figure 1 As shown, the outer casing 1 includes a lower casing 101 and a top cover 102. The lower casing 101 and the top cover 102 are separate structures, which facilitates the installation of components such as the battery cell assembly 2, the first support assembly 3, the circuit board 6, and the stop member 8 inside the lower casing 101. After installation, the top cover 102 can be installed at the top opening of the lower casing 101. The top cover 102 and the lower casing 101 can be connected by bolts, clips 313, or welding. Of course, the structure of the outer casing 1 is not limited to this and can be designed according to actual needs.

[0153] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery module, characterized in that, include: The device comprises a housing, a battery cell assembly, a first support assembly, a circuit board, and a stop member; wherein the battery cell assembly, the first support assembly, the circuit board, and the stop member are all disposed within the housing; the battery cell assembly includes a plurality of battery cells stacked sequentially along a first preset direction, and at least one end of each battery cell along its height direction is provided with a tab; the first support assembly includes two first support members, and the two first support members are disposed at the same end of the battery cell assembly where the tab is provided, and the two first support members are connected to each other; Both of the first support members are formed with a plurality of first clearance through holes arranged sequentially along the first preset direction; the circuit board is disposed on the side of the two first support members away from the cell assembly, and the two first support members are supported between the circuit board and the cell assembly, and the electrode tab of the cell passes through the first clearance through holes and the through holes on the circuit board in sequence and bends on the circuit board. Along the height direction of the battery cell, a stop member is provided between the end of the circuit board and the end of the housing, and the stop member is respectively disposed against the end of the circuit board and the end of the housing to limit the circuit board, the two first support members and the battery cell assembly.

2. The battery module according to claim 1, characterized in that, The battery module also includes multiple heat sinks, which are interspersed at different positions between the battery cell assemblies. Each heat sink is in contact with the inner wall of the outer casing and is used to conduct the heat generated by the battery cell to the outer casing for heat dissipation.

3. The battery module according to claim 2, characterized in that, The heat sink includes a connected body and a bent portion; wherein the body is inserted into the battery cell assembly, the bent portion is bent relative to the body and toward the side of the battery cell assembly without tabs, and the bent portion is disposed against the inner wall of the housing.

4. The battery module according to claim 3, characterized in that, The bending portion includes a side bending portion and a bottom bending portion; wherein the side bending portion abuts against the side wall of the outer casing, and the bottom bending portion abuts against the bottom wall of the outer casing; and / or The body has protrusions and recesses, and the protrusions and recesses are arranged alternately along the height direction of the battery cell. The body can undergo elastic deformation under the pressure of two adjacent battery cells so that the body and the two battery cells fit tightly together.

5. The battery module according to claim 3, characterized in that, The space between the bent portion and the inner wall of the outer casing is filled with thermally conductive adhesive; and / or The battery module further includes a first flexible member disposed between the cell assembly and the inner wall of the housing, and the first flexible member has an avoidance notch, with the bent portion passing through the avoidance notch and bending at the side of the first flexible member near the inner wall of the housing; and / or Along the height direction of the battery cell, the highest point of the top of the heat sink is lower than the lowest point of the top tab of the battery cell; and / or The heat sink is made of metal.

6. The battery module according to claim 1, characterized in that, Along the height direction of the battery cell, the stop member contacts the electrode tab of the battery cell; the stop member has an opening facing a heat dissipation chamber disposed away from the battery cell, and a vent hole is formed on the side of the stop member near the battery cell, and the vent hole is connected to the heat dissipation chamber.

7. The battery module according to claim 6, characterized in that, The battery module further includes a heat dissipation component, which is fixed in the heat dissipation chamber and contacts the inner wall of the heat dissipation chamber and the top or bottom of the outer shell respectively; the heat dissipation component is correspondingly provided with the vent hole. The heat dissipation component includes a heat dissipation part and two heat-conducting parts connected to the heat dissipation part; wherein the two heat-conducting parts are respectively disposed on opposite sides of the heat dissipation part; the heat-conducting parts are connected to the inner wall of the heat dissipation chamber, and the heat dissipation part abuts against the top or bottom of the outer shell.

8. The battery module according to claim 7, characterized in that, Along the height direction of the battery cell, the vent holes are provided at least corresponding to a portion of the tabs; and / or The stop member is a box-shaped structure with its opening facing away from the battery cell side, and the hollow interior of the box-shaped structure serves as a heat dissipation chamber; and / or The number of ventilation holes is multiple, and they are arranged in a grid pattern; and / or The heat dissipation component is made of a thermally conductive and insulating material.

9. The battery module according to claim 1, characterized in that, The stop member has a main clearance groove and an auxiliary clearance groove formed on the side near the battery cell. The battery module also includes a battery management module, which is disposed at the top or bottom of the battery cell and located within the main clearance groove. The sidewall of the main clearance groove has a through clearance notch. The battery module also includes a wire harness clamp, which is disposed on the inner wall of the main clearance groove for clamping wire harnesses; and / or The stop component is made of a thermally conductive and insulating material.

10. The battery module according to claim 1, characterized in that, The battery module further includes at least one second support component, and when there are multiple second support components, one of the second support components is selected and installed on the first support component; each second support component includes two second support members, and the two second support members are disposed on the side of the two first support members opposite to the cell assembly, and the two second support members are connected to the corresponding two first support members by fastening member threads; The two second support members abut against each other, and the two second support members are supported between the circuit board and the two first support members; Both of the first support members are formed with a plurality of second clearance through holes arranged sequentially along a first preset direction, and are used to lead out the tabs of the battery cell.

11. The battery module according to claim 10, characterized in that, The first support member has a first threaded hole, the second support member has a second threaded hole, the fastening member has an external thread, and the fastening member is threadedly connected to both the first threaded hole and the second threaded hole, and the connection position of the fastening member with the first threaded hole and the second threaded hole can be adjusted; and / or The number of the second support assemblies is multiple, and the thickness of the second support member in each second support assembly is different along the height direction of the electrode tab of the battery cell; and / or Both of the second support components are made of plastic.

12. The battery module according to claim 1, characterized in that, The two first support members are detachably connected by a snap-fit ​​mechanism, or the two first support members are an integral structure; and / or Both of the first support components are made of plastic.

13. The battery module according to any one of claims 1 to 12, characterized in that, The battery module further includes an isolation plate and an end plate; wherein, along the first preset direction, the end plate and the isolation plate are sequentially provided at both ends of the cell assembly, and the isolation plate is disposed against the inner wall of the outer shell to limit the position of the cell assembly.

14. The battery module according to claim 13, characterized in that, The isolation plate includes a main body and a plurality of flanged plates connected to the main body; wherein the plurality of flanged plates are sequentially arranged along the circumference of the main body, and the ends of the plurality of flanged plates away from the main body abut against the inner sidewall of the outer casing; and / or The isolation plate is connected to the outer shell by welding; and / or The isolation plate is a metal plate; and / or The end plate is made of insulating material.

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