Collecting structure and battery module

Abstract

The application provides a collection structure and a battery module, and relates to the technical field of power batteries. The collection structure comprises a wire harness isolation component, the length direction of the wire harness isolation component is configured to be arranged along the front-back direction, and the wire harness isolation component is located at the left end and / or the right end of a battery monomer and is used for being connected with the output pole of the battery monomer; and the collection structure comprises an output component, the length direction of the output component is configured to be arranged along the left-right direction, and the output component is arranged on the wire harness isolation component and is used for being connected with the battery component formed by connecting a plurality of battery monomers. The wire harness isolation component is distributed along the front-back direction, the wire harness isolation component is located at the left end and / or the right end of the battery monomer, the output component is distributed along the left-right direction, and the output component is connected to the wire harness isolation component. Through the cooperation of the output component and the wire harness isolation component, reliable electrical connection and signal collection functions can be provided for the battery monomer in limited space.

Description

Technical Field

[0001] This application relates to the field of power battery technology, and more specifically, to a data acquisition structure and a battery module. Background Technology

[0002] As battery technology gradually improves, the market's requirements for battery modules are also constantly increasing. For battery modules, they need to meet basic indicators such as performance, lifespan, and safety, so data collection is therefore very important.

[0003] In related technologies, the data acquisition device is usually placed at the top of the battery module to collect its information. However, for side-mounted terminals, it is difficult to design a data acquisition device due to space limitations. Summary of the Invention

[0004] The purpose of this application is to provide a data acquisition structure and a battery module that can acquire signals from the battery module within a limited space.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] In a first aspect, this application provides a data acquisition structure, comprising: a wire harness isolation assembly configured along the front-to-back direction in its length direction, and the wire harness isolation assembly being located at the left end and / or right end of a battery cell for connection to the output terminal of the battery cell; and an output assembly configured along the left-to-right direction in its length direction, and the output assembly being disposed on the wire harness isolation assembly for connection to a battery assembly formed by connecting a plurality of battery cells.

[0007] In the above implementation process, the wiring harness isolation components are distributed along the front-to-back direction and are located at the left and / or right ends of the battery cell. The output components are distributed along the left-to-right direction and are connected to the wiring harness isolation components. Through the cooperation of the output components and the wiring harness isolation components, reliable electrical connection and signal acquisition functions can be provided to the battery cell within a limited space.

[0008] In some embodiments, the output component includes an output member and a low-voltage connector. The output member has a receiving cavity on the side near the wire harness isolation component. The low-voltage connector is disposed in the receiving cavity and is connected to the wire harness isolation component.

[0009] In the above implementation process, the output component is provided with a receiving cavity, which can accommodate the low-voltage connector. Since the low-voltage connector is located in the direction of the vertical wire harness isolation component, the signal of the battery cell can be transmitted to the battery management system in a limited space. At the same time, the wire harness length between the low-voltage connector and the battery management system can be shortened, saving the internal space occupied by the wire harness and improving the energy density of the battery module.

[0010] In some embodiments, the output member has a plurality of snap-fit ​​bodies extending from the side near the wiring harness isolation assembly, the plurality of snap-fit ​​bodies being spaced apart along the periphery of the output member to form a snap-fit ​​connection with the low-voltage connector.

[0011] In the above implementation process, the output component is provided with a snap-fit ​​body for snapping the low-voltage connector, so that when the low-voltage connector is assembled on the output component, the overall connection stability can be guaranteed and the safety during product use can be improved.

[0012] In some embodiments, the output component includes an output base and an output aluminum bar, the output base being connected to the output aluminum bar, and the output aluminum bar being connected to the battery assembly. This ensures that a battery assembly composed of individual battery cells can be connected within a limited space.

[0013] In some embodiments, the output base is provided with a plurality of fixing holes along the vertical direction, a nested nut is provided in the fixing holes, and the output aluminum bar is provided with a connecting hole communicating with the fixing holes.

[0014] In the above implementation process, the nested nut is set inside the output base, and the output aluminum bar is provided with a connection hole corresponding to the nested nut, so that the output base can fix the busbar connected to the output pole of the battery assembly through the nested nut. The nested nut can increase the bolt preload and reduce the risk of torque attenuation.

[0015] In some embodiments, the output base is further provided with a mating hole along the vertical direction. The mating hole is located on the side of the output base away from the wire harness isolation component, and a steel sleeve is disposed in the mating hole.

[0016] In the above implementation process, the output base is provided with mating holes, and a steel sleeve is provided in the mating holes. After the battery cell is connected to the acquisition structure, it can be connected to the module end plate of the battery module through the steel sleeve on the output base. This ensures that the module end plate fixes the output component, reduces the space occupation, and improves the energy density of the battery component.

[0017] In some embodiments, the height of the upper end of the steel sleeve is not less than the height of the upper end of the output base. This helps to ensure that the axial force of the fasteners used to fix the output base and the module end plate is not reduced due to the influence of the plastic parts when the output base is connected to the module end plate, thereby improving the overall structural strength.

[0018] In some embodiments, the output component further includes an output cover plate located on the side of the output aluminum bus away from the output base, and connected to the output base to cover the fixing hole and the connection hole. By connecting the busbar of the battery assembly to the output component and then covering it with the output cover plate, the safety of the connection and use is ensured, and the risk of short circuits at the connection point is reduced.

[0019] In some embodiments, the wire harness isolation assembly includes a wire harness isolation plate, a circuit board, and a busbar. The circuit board and the busbar are both fixed to the wire harness isolation plate. The circuit board is connected to the busbar, and the busbar is used to connect the output terminals of two adjacent battery cells.

[0020] In the above implementation process, the circuit board and the busbar are connected to the wire harness isolation board, and the circuit board is connected to the busbar. The busbar is connected to the output terminal of the battery cell, which can be used to collect signals from the battery cell and ensure the safety of the product during use.

[0021] In some embodiments, the circuit board is located above the busbar, and a connecting piece is provided on the side of the circuit board near the busbar, the connecting piece being used to connect the circuit board to the busbar.

[0022] In some embodiments, the circuit board is further provided with an extension arm on the side near the busbar, the extension arm being located between the connecting piece and the circuit board. By providing an extension arm between the connecting piece and the circuit board, a cushioning effect can be ensured during product use.

[0023] Secondly, this application also provides a battery module, including: a module end plate having a mounting surface; and a data acquisition structure as described in any of the above claims, wherein the output component of the data acquisition structure is connected to the mounting surface on the side away from its wiring harness isolation component.

[0024] In the above implementation process, the module end plate is provided with a mounting surface, so that after the acquisition structure is connected to the battery cell and battery module, the output component of the acquisition structure can be connected to the mounting surface, which is beneficial to provide a reliable electrical connection to the battery module in a limited space, thereby realizing the signal acquisition function.

[0025] Other features and advantages of this application will be set forth in the following description and will be apparent in part from the description or may be learned by practicing embodiments of this application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For users of ordinary skills in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of a data acquisition structure disclosed in an embodiment of this application.

[0028] Figure 2 This is a front view of a data acquisition structure disclosed in an embodiment of this application.

[0029] Figure 3 This is a schematic diagram of the output component of a data acquisition structure disclosed in an embodiment of this application.

[0030] Figure 4 This is an exploded view of the output component of a data acquisition structure disclosed in an embodiment of this application.

[0031] Figure 5 This is a cross-sectional view of the output component of a data acquisition structure disclosed in an embodiment of this application.

[0032] Figure 6 This is a schematic diagram of the output component of a data acquisition structure disclosed in an embodiment of this application.

[0033] Figure 7 This is a schematic diagram of the wire harness isolation plate of a data acquisition structure disclosed in an embodiment of this application.

[0034] Figure 8 This is a schematic diagram of the circuit board structure of a data acquisition structure disclosed in an embodiment of this application.

[0035] Figure 9 This is a partial structural schematic diagram of a battery module disclosed in an embodiment of this application.

[0036] Figure Labels

[0037] 100. Acquisition structure; 101. Wire harness isolation assembly; 1011. Wire harness isolation plate; 1012. Circuit board; 1013. Busbar; 1014. Connecting piece; 1015. Extension arm; 102. Output assembly; 1021. Output component; 10211. Output base; 10212. Output busbar; 10213. Nested nut; 10214. Steel sleeve; 10215. Output end cover; 1022. Low-voltage connector; 1023. Snap-fit ​​body; 200. Module end plate. Detailed Implementation

[0038] 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.

[0039] 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 to illustrate selected embodiments of the application. All other embodiments obtained by users of ordinary skill in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0040] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it is not necessary to further define and explain it in subsequent figures.

[0041] 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, or the orientation or positional relationship commonly used when the product of the invention is in use. 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. In addition, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0042] 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.

[0043] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" 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 application based on the specific circumstances.

[0044] Example

[0045] In this application, the battery cell mentioned is a physical module that provides voltage and capacity. Specifically, the battery cell includes an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode, a negative electrode, and a separator. The battery cell primarily operates by the movement of metal ions between the positive and negative electrodes. The positive electrode includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector, and the uncoated positive current collector protrudes beyond the coated positive current collector, serving as the positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive current collector can be aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc. The negative electrode includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector, and the uncoated negative current collector protrudes from the coated negative current collector, serving as the negative electrode tab. The negative current collector can be made of copper, and the negative active material can be made of carbon or silicon, etc. To ensure that a large current can be passed without melting, multiple positive electrode tabs and multiple negative electrode tabs are stacked together. The separator can be made of PP (polypropylene) or PE (polyethylene), etc.

[0046] Based on the different structures of the battery cells, battery modules are mainly divided into three types: cylindrical battery modules, directional soft-pack modules, and square hard-shell modules. However, due to space limitations, it is difficult to design a data acquisition device for modules with output terminals set at both ends of the battery cells.

[0047] In view of this, such as Figures 1-2As shown, in a first aspect, this application provides a data acquisition structure 100, including: a wire harness isolation component 101 and an output component 102. The wire harness isolation component 101 is connected to the output terminal of the battery cell, and the output component 102 is connected to the wire harness isolation component 101 and is connected to the output terminal of the battery assembly composed of the battery cells through a busbar, thereby realizing the signal acquisition function in a limited space.

[0048] Specifically, the wiring harness isolation assembly 101 is configured along the front-to-back direction and is located at the left and / or right end of the battery cell, for connecting to the output terminal of the battery cell; the output assembly 102 is configured along the left-to-right direction and is disposed on the wiring harness isolation assembly 101 for connecting to a battery assembly formed by connecting several battery cells. It is understood that the output assembly 102 can also be used to connect to a battery management system. The wiring harness isolation assembly 101 can collect information such as voltage, current, and temperature signals from the battery cells. When the number of battery cells is large, multiple output assemblies 102 can be set up to meet the data collection needs within a limited space.

[0049] In the above implementation process, the wiring harness isolation component 101 is distributed along the front-to-back direction and is located at the left and / or right end of the battery cell. The output component 102 is distributed along the left-to-right direction and is connected to the wiring harness isolation component 101. Through the cooperation between the output component 102 and the wiring harness isolation component 101, it can provide reliable electrical connection and signal acquisition function to the battery cell within a limited space.

[0050] like Figures 3-5 As shown, the output component 102 includes an output element 1021 and a low-voltage connector 1022. The output element 1021 has a receiving cavity on the side near the wire harness isolation component 101. The low-voltage connector 1022 is disposed within the receiving cavity and is connected to the circuit board 1012 of the wire harness isolation component 101. For example, the connection method between the low-voltage connector 1022 and the output element 1021 can be varied, such as a combination of adhesive bonding and snap-fit. When the output element 1021 is provided at both the front and rear ends of the wire harness isolation component 101, there can be only one low-voltage connector 1022 or two; the specific number can be set according to the actual situation and is not specifically limited here.

[0051] In the above implementation process, the output component 1021 is provided with a receiving cavity, which can accommodate the low-voltage connector 1022. Since the low-voltage connector 1022 is located in the direction of the vertical wire harness isolation component 101, the signal of the battery cell can be transmitted to the battery management system in a limited space. At the same time, the wire harness length between the low-voltage connector 1022 and the battery management system can be shortened, saving the internal space occupied by the wire harness and improving the energy density of the battery module.

[0052] like Figure 6 As shown, the output component 1021 has a plurality of snap-fit ​​bodies 1023 extending from the side near the wire harness isolation assembly 101. These snap-fit ​​bodies 1023 are spaced apart along the periphery of the output component 1021 to form a snap-fit ​​connection with the low-voltage connector 1022. Exemplarily, the snap-fit ​​bodies 1023 include, but are not limited to, latches, and three snap-fit ​​bodies 1023 may be provided. One snap-fit ​​body 1023 is used to snap-fit ​​with the upper end of the low-voltage connector 1022, and the remaining two snap-fit ​​bodies 1023 are used to snap-fit ​​with the lower end of the low-voltage connector 1022, thus providing support and locking.

[0053] In the above implementation process, the output component 1021 is provided with a snap-fit ​​body 1023 for snapping the low-voltage connector 1022, so that when the low-voltage connector 1022 is assembled on the output component 1021, the overall connection stability can be guaranteed and the safety during product use can be improved.

[0054] Please refer to again Figures 4-5 The output component 1021 includes an output base 10211 and an output aluminum bar 10212. The output base 10211 is connected to the output aluminum bar 10212, and the output aluminum bar 10212 is connected to the battery assembly, ensuring that the battery assembly composed of individual battery cells can be connected within a limited space. For example, the output base 10211 and the output aluminum bar 10212 can be connected using an integral molding process, and the upper end of the output base 10211 can be provided with a clearance opening. A portion of the structure of the output aluminum bar 10212 is located at the clearance opening. The output aluminum bar 10212 can be used to connect two adjacent battery assemblies to achieve series connection of the battery assemblies, etc.

[0055] Please refer to again Figures 4-5The output base 10211 has several fixing holes along its vertical direction. A nested nut 10213 is installed within each fixing hole, and the output aluminum bus 10212 has a connecting hole communicating with the fixing holes. For example, there are two fixing holes, and each fixing hole contains the nested nut 10213. That is, when the output base 10211 and the output aluminum bus 10212 are integrally formed, the nested nut 10213 needs to be pre-embedded within the output base 10211. The nested nut 10213 is located inside the output base 10211, and the output aluminum bus 10212 has a connecting hole corresponding to the nested nut 10213. This allows the output base 10211 to fix the busbar connected to the output terminal of the battery assembly to the output component 1021 through the cooperation of the nested nut 10213 and the fixing bolt. Furthermore, the nested nut 10213 increases the bolt preload and reduces the risk of torque attenuation.

[0056] Please refer to again Figures 4-5 The output base 10211 is also provided with mating holes along the vertical direction. The mating holes are located on the side of the output base 10211 away from the wire harness isolation component 101, and a steel sleeve 10214 is disposed in the mating holes. The output base 10211 is provided with mating holes, and a steel sleeve 10214 is disposed in the mating holes, so that after the battery cell is connected to the acquisition structure 100, it can be connected to the module end plate 200 of the battery module through the steel sleeve 10214 on the output base 10211, ensuring that the module end plate 200 fixes the output component 102, reducing the space occupation, and improving the energy density of the battery component.

[0057] In some embodiments, the height of the upper end of the steel sleeve 10214 is not less than the height of the upper end of the output base 10211. For example, if the upper end of the steel sleeve 10214 is higher than the upper end of the output base 10211, it is beneficial that when the output base 10211 and the module end plate 200 are connected by fasteners (such as bolts), since a plastic part needs to be placed between the fastener and the upper end of the output base 10211, the axial force of the fastener used to fix the output base 10211 and the module end plate 200 will not be reduced due to the influence of the plastic part, thereby improving the overall structural strength.

[0058] In some embodiments, the output component 1021 further includes an output cover plate located on the side of the output aluminum bus 10212 away from the output base 10211, and connected to the output base 10211 to cover the fixing hole and the connection hole. For example, the output cover plate can be disposed at a clearance opening of the output base 10211, and the connection between the output cover plate and the output base 10211 can be a snap-fit ​​method. After the busbar of the battery assembly is connected to the output component 102, the output cover plate covers it, ensuring the safety of the connection and use process, and reducing the risk of short circuits at the connection point.

[0059] like Figures 7-8 As shown, the wire harness isolation assembly 101 includes a wire harness isolation plate 1011, a circuit board 1012, and a busbar 1013. The circuit board 1012 and the busbar 1013 are both fixed to the wire harness isolation plate 1011. The circuit board 1012 is connected to the busbar 1013, which is used to connect the output terminals of two adjacent battery cells. For example, the wire harness isolation plate 1011 is provided with a first receiving slot and a second receiving slot. Each of the first and second receiving slots also contains a plurality of components. Each first receiving slot contains the circuit board 1012, and each second receiving slot contains the busbar 1013. The circuit board 1012 and the busbar 1013 can be fixed to the wire harness isolation plate 1011 by heat fusion.

[0060] In the above implementation process, the circuit board 1012 and the busbar 1013 are connected to the wire harness isolation plate 1011, and the circuit board 1012 is connected to the busbar 1013. The busbar 1013 is connected to the output terminal of the battery cell, which can be used to collect signals from the battery cell and ensure the safety of the product during use.

[0061] Please refer to again Figure 8 The circuit board 1012 is located above the busbar 1013, and a connecting piece 1014 is provided on the side of the circuit board 1012 near the busbar 1013. The connecting piece 1014 includes, but is not limited to, a nickel sheet, and is used to connect the circuit board 1012 and the busbar 1013.

[0062] In some embodiments, the circuit board 1012 is further provided with an extension arm 1015 on the side near the busbar 1013. The extension arm 1015 is located between the connecting piece 1014 and the circuit board 1012, and the extension arm 1015 may be configured in an L-shape. By providing the extension arm 1015 between the connecting piece 1014 and the circuit board 1012, it is possible to ensure that the product plays a buffering role during use.

[0063] like Figure 9 As shown, in a second aspect, this application also provides a battery module, including: a module end plate 200 having a mounting surface; and a data acquisition structure 100 as described in any of the preceding claims, wherein the output component 102 of the data acquisition structure 100 is connected to the mounting surface on the side away from its wiring harness isolation component 101. Exemplarily, the battery module can be used to provide electrical energy to electrical devices, such as electric toys, power tools, electric vehicles, electric cars, and spacecraft. When the electrical device is a vehicle, the vehicle can be a gasoline vehicle, a natural gas vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles. A battery pack is installed inside the vehicle, and the battery pack can be located at the bottom, front, or rear of the vehicle. The battery pack can be used to power the vehicle; for example, the battery pack can serve as the vehicle's operating power source. The vehicle may also include a controller and a motor, the controller controlling the battery pack to supply power to the motor, for example, for the vehicle's starting, navigation, and driving power requirements.

[0064] In the above implementation process, the module end plate is provided with a mounting surface, so that after the acquisition structure is connected to the battery cell and battery module, the output component of the acquisition structure can be connected to the mounting surface, which is beneficial to provide a reliable electrical connection to the battery module in a limited space, thereby realizing the signal acquisition function.

[0065] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery module, comprising a module end plate and a data acquisition structure, wherein the module end plate is provided with a mounting surface, and the output component of the data acquisition structure is connected to the mounting surface on the side away from its wiring harness isolation component, characterized in that, The acquisition structure includes: A wiring harness isolation assembly is configured to run along the front-to-back direction along its length, and the wiring harness isolation assembly is located at the left and / or right end of the battery cell for connection to the output terminal of the battery cell. An output component is configured to be arranged along the left-right direction in its length direction, and the output component is disposed on the wire harness isolation component for connection with a battery assembly formed by connecting a plurality of battery cells. The output component includes an output element and a low-voltage connector. The output element has a receiving cavity on the side near the wire harness isolation component. The low-voltage connector is disposed in the receiving cavity and is connected to the wire harness isolation component. The output component includes an output base and an output aluminum bar, the output base is connected to the output aluminum bar, and the output aluminum bar is connected to the battery assembly; The output base is also provided with a mating hole along the vertical direction. The mating hole is located on the side of the output base away from the wire harness isolation component, and a steel sleeve is disposed in the mating hole. The steel sleeve is connected to the module end plate of the battery module. The output component has a plurality of snap-fit ​​bodies extending from the side near the wire harness isolation assembly. The plurality of snap-fit ​​bodies are spaced apart along the periphery of the output component to form a snap-fit ​​connection with the low-voltage connector.

2. The battery module according to claim 1, characterized in that, The output base has several fixing holes along the vertical direction, and nested nuts are installed in the fixing holes. The output aluminum bar has a connecting hole that communicates with the fixing holes.

3. The battery module according to claim 1, characterized in that, The height of the upper end of the steel sleeve is not less than the height of the upper end of the output base.

4. The battery module according to claim 2, characterized in that, The output component also includes an output cover plate, which is located on the side of the output aluminum bar away from the output base and is connected to the output base to cover the fixing hole and the connecting hole.

5. The battery module according to claim 1, characterized in that, The wiring harness isolation assembly includes a wiring harness isolation plate, a circuit board, and a busbar. The circuit board and the busbar are both fixed to the wiring harness isolation plate. The circuit board is connected to the busbar, and the busbar is used to connect the output terminals of two adjacent battery cells.

6. The battery module according to claim 5, characterized in that, The circuit board is located above the busbar, and a connecting piece is provided on the side of the circuit board near the busbar, the connecting piece being used to connect the circuit board to the busbar.

7. The battery module according to claim 6, characterized in that, An extension arm is also provided on the side of the circuit board near the busbar, and the extension arm is located between the connecting piece and the circuit board.

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