Battery module

Abstract

The utility model provides a kind of battery module, relate to battery technical field, to optimize battery module inner structure to some extent, make electrical separation of electric core and BMS, reduce the security risk of battery module.The utility model provides a kind of battery module, including shell assembly, BMS module, battery assembly;Shell assembly includes main casing, BMS module and battery assembly are all arranged in main casing, BMS module includes module main body and mounting plate, module main body is installed on mounting plate, mounting plate is connected with the inner wall of main casing, and module main body and battery assembly have set interval between.

Description

Technical Field

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

[0002] With the rapid development of new energy vehicles and energy storage technologies, lithium-ion batteries are widely used as a core power source in various scenarios. The Battery Management System (BMS), as a key control unit in the battery module, undertakes important functions such as battery status monitoring, charge / discharge management, and safety protection. In existing battery module designs, the BMS is typically top-mounted, a layout that facilitates easier assembly.

[0003] Current mainstream battery modules employ a stacked structure, with multiple cells connected in series or parallel to form a battery unit. During long-term charge-discharge cycles, the insertion / deintercalation of lithium ions in the electrode materials causes gas to be generated inside the cell, accompanied by volume expansion. This phenomenon is particularly pronounced under high-temperature or high-current conditions. Although existing technologies alleviate pressure by placing buffer pads between cells or reserving expansion gaps in the module casing, when an abnormal expansion occurs in a cell, the deformation at its top is directly transmitted to the BMS mounting area. Since the BMS circuit board and its electronic components are sensitive to mechanical stress, this continuous compression can not only cause physical damage such as PCB board deformation and component desoldering, but also electrical faults such as short circuits in the sampling harness, ultimately leading to the failure of the entire battery system.

[0004] Therefore, there is an urgent need to provide a battery module to address the problems existing in the current technology to some extent. Utility Model Content

[0005] The purpose of this utility model is to provide a battery module that optimizes the internal structure of the battery module to a certain extent, so as to achieve electrical separation between the battery cell and the BMS and reduce the safety risks of the battery module.

[0006] This utility model provides a battery module, including a housing assembly, a BMS module, and a battery assembly. The housing assembly includes a main housing, and the BMS module and the battery assembly are both disposed within the main housing. The BMS module includes a module body and a mounting plate. The module body is mounted on the mounting plate, and the mounting plate is connected to the inner wall of the main housing. There is a spacing between the module body and the battery assembly.

[0007] The battery module provided by this utility model also includes a connector. An installation part is formed inside the main housing. A mating part is formed on the mounting plate corresponding to the position of the installation part. The connector passes through the mating part and the installation part to connect the mounting plate to the main housing.

[0008] Specifically, the number of mounting parts is at least three, and the docking parts are arranged in a one-to-one correspondence with the mounting parts.

[0009] The mounting plate has multiple wire-binding holes formed on its edge, and these holes penetrate the mounting plate along its thickness.

[0010] Specifically, the mounting plate has clearance holes, and the module body has connection holes corresponding to the clearance holes.

[0011] The housing assembly further includes a top cover, the main housing has an opening, the top cover is fastened to and closes the opening, forming a receiving space with the main housing for accommodating the battery assembly and the BMS module.

[0012] Specifically, the main housing has an embedded portion formed in the circumference, and the top cover is fastened to the embedded portion, so that the outer wall surface of the top cover and the outer wall surface of the main housing are on the same plane.

[0013] Furthermore, a stepped portion is formed on one side of the main housing corresponding to the BMS module, and a mating portion is formed on the top cover corresponding to the stepped portion, the mating portion forming a stepped structure on the top cover; an electrode post is integrated on the mating portion, and the electrode post and the BMS module are connected by a circuit.

[0014] Furthermore, the depth of the mating part is consistent with the height of the pole post, so that the top surface of the pole post and the upper surface of the top cover are located on the same plane.

[0015] Furthermore, the top cover is provided with a handle, which is rotatably connected to the top cover.

[0016] Compared with existing technologies, the battery module provided by this utility model has the following advantages: The battery module provided by this utility model includes a housing assembly, a BMS module, and a battery assembly. The housing assembly includes a main housing, and the BMS module and the battery assembly are both disposed inside the main housing. The BMS module includes a module body and a mounting plate. The module body is mounted on the mounting plate, and the mounting plate is connected to the inner wall of the main housing. There is a spacing between the module body and the battery assembly.

[0017] This analysis shows that the main housing, which is part of the outer casing assembly, provides a mounting base for the BMS module and battery assembly. The mounting plate allows the main body of the BMS module to be mounted on the inner wall of the main housing, creating a mounting gap between it and the battery assembly.

[0018] The physical separation between the module body and the battery assembly serves two purposes. First, it provides electrical isolation, reducing electromagnetic interference from high-current charging and discharging to the BMS signal acquisition and control circuits, thus improving system electromagnetic compatibility and signal measurement accuracy. Second, the separation also creates an effective heat dissipation channel, preventing the concentrated heat generation of the BMS module from causing thermal shock to the battery assembly. This facilitates overall thermal management, reduces the risk of thermal runaway, and enhances the long-term reliability and lifespan of the module.

[0019] Meanwhile, even if the battery components expand and deform during use, the interval can act as a buffer zone for deformation to a certain extent, reducing the direct impact of the battery components' expansion and deformation on the BMS module, thereby ensuring the overall stability of the battery module.

[0020] Furthermore, the mounting plate provides a more stable mounting foundation for the module body. Since the mounting plate in this application is connected to the main shell, it enhances the structural stability and vibration and shock resistance of the module body, making it more suitable for harsh working conditions. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in 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 utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is an exploded view of the battery module provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of the main housing in the battery module from a first-view perspective, provided as an embodiment of the present utility model. Figure 3 A schematic diagram of the BMS module in the battery module provided in this embodiment of the utility model from a second perspective; Figure 4 This is a third-view structural diagram of the BMS module in the battery module provided in an embodiment of the present invention.

[0023] In the diagram: 1-Main housing; 101-Mounting part; 102-Stepped part; 103-Embedded part; 2-BMS module; 201-Module body; 2011-Connection hole; 202-Mounting plate; 2021-Mating part; 2022-Wire binding hole; 2023-Void hole; 3-Top cover; 301-Matching part; 302-Handle part; 4-Terminal post; 5-Battery assembly. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0025] In the description of the embodiments of this application, it should be noted that the terms "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, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing the utility model 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 the utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of the embodiments of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "connect" 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 utility model based on the specific circumstances.

[0028] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0029] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” may be used herein to describe the relationship between one element and another as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also the different orientations of the device during use or operation.

[0030] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0031] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0032] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have various constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis that they can be implemented by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0033] like Figures 1-3 As shown, this utility model provides a battery module, including a housing assembly, a BMS module 2, and a battery assembly 5. The housing assembly includes a main housing 1, and the BMS module 2 and the battery assembly 5 are both disposed inside the main housing 1. The BMS module 2 includes a module body 201 and a mounting plate 202. The module body 201 is mounted on the mounting plate 202, and the mounting plate 202 is connected to the inner wall of the main housing 1. There is a spacing between the module body 201 and the battery assembly 5.

[0034] Compared with existing technologies, the battery module provided by this utility model has the following advantages: The battery module provided by this utility model can provide an installation base for the BMS module 2 and the battery assembly 5 through the main housing 1 of the outer shell assembly, and the module body 201 of the BMS module 2 can be installed on the inner wall of the main housing 1 through the mounting plate 202, forming a setting interval between it and the battery assembly 5.

[0035] The physical separation between the module body 201 and the battery component 5 serves two purposes. First, it provides electrical isolation, reducing electromagnetic interference from high-current charging and discharging to the BMS signal acquisition and control circuits, thus improving the system's electromagnetic compatibility and signal measurement accuracy. Second, the separation also creates an effective heat dissipation channel, preventing the concentrated heat generation of the BMS module 2 from causing thermal shock to the battery component 5. This facilitates overall thermal management, reduces the risk of thermal runaway, and enhances the long-term reliability and lifespan of the module.

[0036] Meanwhile, even if the battery component 5 expands and deforms during use, the interval can act as a buffer zone for deformation to a certain extent, reducing the direct impact of the expansion and deformation of the battery component 5 on the BMS module 2, thereby ensuring the stability of the overall battery module.

[0037] Furthermore, the mounting plate 202 can provide a more stable mounting foundation for the module body 201. Since the mounting plate 202 in this application is connected to the main housing 1, it can enhance the structural stability and vibration and shock resistance of the module body 201, making it more suitable for harsh working conditions.

[0038] Optionally, such as Figures 1-3 As shown, the battery module provided by this utility model also includes a connector. An installation part 101 is formed inside the main housing 1. A docking part 2021 is formed on the mounting plate 202 corresponding to the position of the installation part 101. The connector passes through the docking part 2021 and the installation part 101 to connect the mounting plate 202 with the main housing 1.

[0039] The connector in this application can be a fastener such as a rivet or bolt. Through the mounting part 101 formed inside the main housing 1 and the mating part 2021 formed by the mounting plate 202 corresponding to the mounting part 101, the fast connection between the mounting plate 202 and the main housing 1 can be achieved by using the connector.

[0040] Furthermore, in this application, the mounting portion 101 is perpendicular to the side wall of the main housing 1, and the docking portion 2021 is perpendicular to the mounting plate 202. Thus, after the docking portion 2021 docks with the mounting portion 101, a certain gap can be formed between the mounting plate 202 and the side wall of the main housing 1, and the size of this gap is the same as the size of the mounting portion 101 and the docking portion 2021.

[0041] It is understandable that the connection between the mounting plate 202 and the main housing 1 through the docking of the docking part 2021 and the mounting part 101 can avoid the impact on the module body 201 when the main housing 1 is impacted. That is, the docking part 2021 and the mounting part 101 can form a gap between the mounting plate 202 and the main housing 1. This gap can form a buffer to a certain extent. Even if the main housing 1 is impacted and dented at the position corresponding to the BMS module 2, it will not directly act on the mounting plate 202, thereby ensuring the safety and stability of the BMS module 2.

[0042] Furthermore, this interval can also reduce the problem of local overheating caused by the rapid transfer of heat from the BMS module 2 to the main housing 1, thereby ensuring the temperature balance and stability of the overall battery system to a certain extent.

[0043] Optionally, the number of mounting parts 101 in this application is at least three, and the docking parts 2021 are provided in a one-to-one correspondence with the mounting parts 101.

[0044] Preferably, such as Figures 1-3 As shown, there are three mounting parts 101 in this application, arranged in a triangular pattern. Correspondingly, there are also three docking parts 2021, so that a stable connection between the mounting plate 202 and the main housing 1 can be achieved through the three docking parts 2021 and the mounting parts 101.

[0045] It should be noted that the installation part 101 and the docking part 2021 in this application are only three, which is one preferred embodiment. Of course, two can also be used. Figure 3 For example, when there are two docking parts 2021, it is best to distribute them diagonally to ensure the stability of the connection, but uneven force distribution will still occur. Therefore, the preferred solution provided in this application uses three. The number can also be more than three, such as four, five or even more, but more mounting parts 101 and docking parts 2021 will increase manufacturing costs and assembly steps.

[0046] Optionally, such as Figure 3 As shown, the mounting plate 202 in this application has a plurality of wire-binding holes 2022 formed on its edge, and the wire-binding holes 2022 penetrate the mounting plate 202 along the thickness of the mounting plate 202.

[0047] Since the module body 201 needs to be connected to the battery pack 5 and the terminal post 4 through wires, the wire tying holes 2022 formed at the edge of the mounting plate 202 can be used to easily bundle the connecting wires, avoiding messy and disordered wires that reduce assembly efficiency and later maintenance.

[0048] Optionally, such as Figure 3 Combination Figure 4As shown, the mounting plate 202 in this application has a clearance hole 2023, and the module body 201 has a connection hole 2011 at the position corresponding to the clearance hole 2023.

[0049] In this application, the diameter of the connecting hole 2011 is smaller than the diameter of the clearance hole 2023. Since the module body 201 in this application needs to be connected to the circuit, and the installation of the circuit requires fasteners such as bolts to tighten it, it is necessary to connect the fastener to the module body 201. After one end of the fastener passes through the connecting hole 2011, it is easy to come into contact with the mounting plate 202. Once in contact, the mounting plate 202 will become electrified, causing the main housing 1 to become electrified. Therefore, this application forms a clearance hole 2023 with a larger diameter on the mounting plate 202 at the position corresponding to the connecting hole 2011. Even if the fastener passes through the connecting hole 2011 to the position of the mounting plate 202, it will not come into contact with the mounting plate 202, thereby avoiding the problem of the mounting plate 202 becoming electrified after the circuit is assembled to a certain extent.

[0050] Optionally, such as Figure 1 Combination Figure 2 As shown, the housing assembly in this application also includes a top cover 3. The main housing 1 has an opening, and the top cover 3 is fastened to and closes the opening, forming a receiving space with the main housing 1 for accommodating the battery assembly 5 and the BMS module 2.

[0051] like Figure 1 As shown, in this application, the main housing 1 has an embedded portion 103 formed in the circumferential direction, and the top cover 3 is fastened to the embedded portion 103, so that the outer wall surface of the top cover 3 and the outer wall surface of the main housing 1 are located on the same plane.

[0052] The embedded portion 103 formed by the edge of the main housing 1 can provide initial positioning for the top cover 3 after it is assembled with the main housing 1. Furthermore, since the thickness of the main housing 1 at the embedded portion 103 is small, the outer wall of the top cover 3 and the outer wall of the main housing 1 can form a uniform plane after assembly, ensuring the flatness of the overall battery module exterior.

[0053] Optionally, such as Figure 1 Combination Figure 2 As shown, the main housing 1 in this application has a stepped portion 102 formed on one side corresponding to the BMS module 2, and the top cover 3 has a mating portion 301 formed at the position corresponding to the stepped portion 102. The mating portion 301 makes the top cover 3 form a stepped structure. A pole post 4 is integrated on the mating portion 301, and the pole post 4 and the BMS module 2 are connected by a line.

[0054] Since the BMS module 2 in this application is located on the side of the battery assembly 5, the positions of the main housing 1 and the top cover 3 corresponding to the BMS module 2 do not require a large space. This application forms a stepped portion 102 in the main housing 1 and a mating portion 301 in the top cover 3 corresponding to the stepped portion 102. The mating portion 301 also forms a stepped structure in the top cover 3, thereby making the space of the main housing 1 and the top cover 3 corresponding to the BMS module 2 more compact.

[0055] Understandably, since the pole post 4 is integrated on the top cover 3, the stepped structure allows the pole post 4 to be closer to the BMS module 2, thereby reducing the length of the wiring and improving internal neatness.

[0056] Preferably, the depth of the mating part 301 in this application is consistent with the height of the pole post 4, so that the top surface of the pole post 4 and the upper surface of the top cover 3 are on the same plane.

[0057] By making the depth of the mating part 301 consistent with the height of the terminal post 4, the stepped structure formed can protect the terminal post 4 to a certain extent. On the other hand, it can also make the top surface of the terminal post 4 and the upper surface of the top cover 3 lie on the same plane, so that the overall battery module does not have any parts protruding from the overall structural frame, and also ensures the safety of the terminal post 4 in subsequent assembly and use.

[0058] Optionally, such as Figure 1 As shown, the top cover 3 in this application is provided with a handle 302, which is rotatably connected to the top cover 3.

[0059] The handle 302 allows the entire battery module to be transferred and moved after the top cover 3 is connected to the main housing 1, improving handling efficiency and convenience.

[0060] It should be further explained here that the connection between the top cover 3 and the main housing 1 in this application is achieved through a combination of adhesive bonding and screwing or riveting. That is, during assembly, a ring of adhesive is first applied along the axial direction of the top cover 3 at the inner corner, and the width of the adhesive is at least greater than the thickness of the edge of the main housing 1, so that the adhesive can be used to bond the top cover 3 and the main housing 1.

[0061] After the colloid has cured, multiple screws or rivets are driven into the circumference of the top cover 3 to further fix the top cover 3 and the main housing 1, ensuring a stable connection between the top cover 3 and the main housing 1.

[0062] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A battery module, characterized in that, Includes housing components, BMS module, and battery components; The housing assembly includes a main housing, and the BMS module and the battery assembly are both disposed within the main housing. The BMS module includes a module body and a mounting plate. The module body is mounted on the mounting plate, and the mounting plate is connected to the inner wall of the main housing. There is a spacing between the module body and the battery assembly.

2. The battery module according to claim 1, characterized in that, It also includes a connector, wherein a mounting portion is formed inside the main housing, and a mating portion is formed on the mounting plate corresponding to the position of the mounting portion. The connector passes through the mating portion and the mounting portion to connect the mounting plate to the main housing.

3. The battery module according to claim 2, characterized in that, The number of mounting parts is at least three, and the docking parts are provided in a one-to-one correspondence with the mounting parts.

4. The battery module according to claim 1, characterized in that, The mounting plate has multiple wire-binding holes formed on its edge, and these holes penetrate the mounting plate along its thickness.

5. The battery module according to claim 1, characterized in that, The mounting plate has clearance holes, and the module body has connection holes corresponding to the clearance holes.

6. The battery module according to claim 1, characterized in that, The housing assembly also includes a top cover, the main housing has an opening, the top cover is fastened to and closes the opening, forming a receiving space with the main housing for accommodating the battery assembly and the BMS module.

7. The battery module according to claim 6, characterized in that, The main housing has an embedded portion formed in the circumference, and the top cover is fastened to the embedded portion so that the outer wall surface of the top cover and the outer wall surface of the main housing are on the same plane.

8. The battery module according to claim 6, characterized in that, The main housing has a stepped portion on one side corresponding to the BMS module, and the top cover has a mating portion at the position of the stepped portion, the mating portion making the top cover form a stepped structure; The mating part integrates a pole post, and the pole post and the BMS module are connected by a line.

9. The battery module according to claim 8, characterized in that, The depth of the mating part is consistent with the height of the pole post, so that the top surface of the pole post and the upper surface of the top cover are on the same plane.

10. The battery module according to claim 6, characterized in that, The top cover is provided with a handle, which is rotatably connected to the top cover.

Images