Integrated lithium battery module

Abstract

The invention discloses an integrated lithium battery module, which solves the problems of poor reusability, poor plasticity, short service life and low energy density of the lithium battery module in the prior art, and comprises a battery core integrated assembly and a circuit integrated assembly, the battery core integrated assembly comprises an insulating shell and a plurality of battery cores in the insulating shell, the arrangement mode of the plurality of battery cells can be changed, the circuit integration assembly comprises an FPC and a plurality of bars connected with the battery cells, and the FPC is provided with a plurality of signal contact ends which are lapped on the surfaces of the bars. The reusability and plasticity are enhanced, ultrahigh energy density is achieved, and the service life is prolonged to a certain extent.

Description

Technical Field

[0001] The present invention relates to the technical field of power batteries, and specifically provides an integrated lithium battery module. Background Art

[0002] With the rapid advancement of new energy power battery technology in the non-road field, the types of batteries on the market have increased significantly to meet the growing and diverse needs. Since the voltage and capacity requirements of power batteries vary from application scenarios, this differentiated demand directly drives the substantial expansion and refinement of the lithium battery pack product line. From low-capacity, high-voltage battery packs suitable for light non-road equipment to high-capacity, high-power versions to support continuous high-intensity operations of heavy machinery, the wide range of lithium battery pack designs is designed to accurately adapt to the specific performance requirements of various new energy equipment, thereby driving the entire industry towards a more efficient and environmentally friendly direction.

[0003] Existing lithium battery modules mainly use cable ties to constrain end plates, side plates and battery packs, or use structural adhesives to ensure the fixing effect. For example, a "battery module" disclosed in Chinese patent documents has a publication number of CN108878702A, and the end plates are made of metal materials, which reduces the safety performance of the lithium battery module and affects the endurance performance in low temperature environments, thereby shortening the service life of the battery cells. The positioning, installation and disassembly operations of each structure are difficult, which increases the difficulty of subsequent maintenance and reduces the reusability of the battery module. In addition, the battery cell arrangement of the existing lithium battery module is fixed, resulting in poor plasticity of the lithium battery module, which cannot be easily adapted to voltage and capacity requirements of different specifications, and also affects the energy density of the lithium battery module. Summary of the invention

[0004] In order to solve the problems of poor reusability and plasticity as well as low service life and energy density of lithium battery modules in the prior art, the present invention provides an integrated lithium battery module, which, through optimized design, enhances reusability and plasticity, achieves ultra-high energy density, and prolongs service life to a certain extent.

[0005] The specific scheme of the present invention is as follows.

[0006] An integrated lithium battery module includes a cell integration component and a circuit integration component. The cell integration component includes an insulating shell and a plurality of cells inside. The arrangement of the plurality of cells can be changed. The circuit integration component includes an FPC and a plurality of tabs connected to the cells. The FPC is provided with a plurality of signal contact terminals placed on the surface of the tabs.

[0007] An integrated lithium battery module of the present invention is mainly composed of a simple splicing of two parts, a battery cell integrated component and a circuit integrated component. The insulating shell prevents the safety hazard of battery cell leakage to a certain extent. The battery cell integrated component can be compatible with a variety of capacity and voltage configurations by changing the number and arrangement of different internal battery cells. The circuit integrated component can be compatible with the series and parallel requirements between battery cells by using a number of bars to connect with the said several battery cells, and then the electrical signals of each battery cell are uniformly led out through a number of signal contact terminals provided with FPC. The lithium battery module in this solution has excellent plasticity and can be upwardly compatible with a variety of capacity and voltage configurations.

[0008] Furthermore, the circuit integration assembly includes a blister tray and a blister cover, the plurality of tabs are mounted on the blister tray and placed in a series-parallel relationship between the cells, and each tab is provided with a circular through hole for welding with the cell pole. The circular through hole provided on the tab facilitates the subsequent welding process and prevents problems such as uneven contact between the tab and the cell pole.

[0009] Furthermore, the bar piece is provided with three different specifications, including a middle bar piece, a first end bar piece and a second end bar piece, the battery cell is electrically connected through the middle bar piece, the first end bar piece and the second end bar piece are respectively arranged at both ends of the blister tray, the first end bar piece is the positive electrode of the module, and the second end bar piece is the negative electrode of the module.

[0010] Three different specifications of bars are arranged on the blister tray according to the series-parallel relationship between the battery cells. By changing the number and arrangement of different battery cells, the lithium battery module can be compatible with a variety of capacity and voltage configurations.

[0011] Furthermore, the interior of the FPC is wired based on the circuit relationship between the battery cells, a connector is provided on the FPC, the connector integrates the information collected by the several signal contact terminals, FR4 is installed between the connector and the blister tray, the signal contact terminal includes a collection nickel sheet and a temperature-sensitive nickel sheet, and the temperature-sensitive nickel sheet is integrated with the NTC thermistor on the basis of the collection nickel sheet.

[0012] The connector integrates the signals collected by several signal contact terminals to meet the collection requirements of the electric control system. The FR4 installed between the connector and the blister tray is generally used as a PCB substrate and has excellent flame retardancy. The structural design of the signal contact terminal not only meets the temperature collection requirements of the battery cell, but also saves the space occupied by the temperature collection structure, facilitates subsequent installation and welding processes, and enables the module to achieve ultra-high energy density.

[0013] Furthermore, the upper end surface of the blister tray is provided with a plurality of cylindrical protrusions, and the tab and the blister cover are provided with positioning and mounting holes, and the tab and the blister cover are assembled on the blister tray through the cooperation of the positioning and mounting holes and the cylindrical protrusions.

[0014] After several tabs on the blister tray are welded to the battery cell poles, align the cylindrical protrusion on the blister tray with the cylindrical mounting hole on the blister cover, and then cover the blister cover to complete the production of the circuit integrated component.

[0015] By setting multiple positioning and installation structures between the structures, the lithium battery integrated module is easy to position, install and disassemble, which facilitates the subsequent repair and maintenance of the battery module, alleviates the technical problems existing in the prior art that the battery module is welded and riveted, cannot be subsequently modified, and is inconvenient to repair, and simplifies the assembly process.

[0016] Furthermore, the first end bar piece and the second end bar piece are partially single-sidedly pasted with nickel sheets, and the FPC stack is arranged in sequence according to the substrate surface, the glue surface, the circuit surface, the circuit protection film and the nickel sheet glue.

[0017] Nickel sheets are partially pasted on one side of the first end bar and the second end bar to prevent direct contact between copper and aluminum, so as to facilitate welding; the FPC is a single-sided board.

[0018] Furthermore, the insulating shell includes an upper cover, two side plates and two end plates, the end plates, side plates and upper cover form a rectangular parallelepiped structure, tightly clamping the internal battery cells, insulating sheets are glued to the inner sides of the end plates and side plates and between the battery cells, and an insulating sheet is also glued to the bottom of the battery cell integrated assembly. The provision of the insulating sheet effectively prevents the safety hazards caused by battery cell leakage and ensures the safety performance of the lithium battery module.

[0019] Furthermore, mounting holes for the positive and negative electrode brackets are provided on the two end plates, and conical clips matching with the mounting holes are provided below the positive and negative electrode brackets. A threaded copper column containing a threaded hole is inlaid in the center of the positive and negative electrode brackets, and threaded through holes matching with the threaded holes are provided on the first end tab and the second end tab, and clip grooves for installing the positive and negative electrode sheaths are provided above the positive and negative electrode brackets.

[0020] Furthermore, the upper cover is provided with two pairs of buckles on the side, the side panel is provided with a slot cooperating with the buckle, the side panel is provided with a reinforcing rib, the end panel is provided with a horizontally and vertically staggered reinforcing rib, and rivet assembly holes for assembling with the end panel are provided on both sides of the length direction of the side panel.

[0021] The design of the reinforcing ribs on the side panels and end panels improves the overall strength of the battery cell integrated assembly and effectively reduces the deformation that may be caused by the expansion of the internal battery cells. The upper cover and the side panels are fixed by buckles, and the end panels and the side panels are fixed by rivets, so that the structure of the lithium battery module is stable enough and easy to install, which effectively improves the assembly efficiency. The insulating shell fastened by rivets and buckles clamps the internal battery cells, and multiple battery cells can be fixed without the use of cable ties.

[0022] Furthermore, a heating film is provided on the side plate, and the heating film is made of a PI film and a heating chip, and a PI film and a double-sided adhesive stacked in sequence. The structural design of the heating film ensures the endurance performance of the lithium battery module under low temperature conditions.

[0023] Therefore, the present invention has the following beneficial effects: (1) The cell integration components and circuit integration components complement each other. By changing the number and arrangement of different cells inside the cell integration components and using the busbars to connect the cells to meet the series and parallel requirements of the cells, it can be compatible with a variety of capacity and voltage configurations, thereby improving the plasticity of the lithium battery module and paving the way for customized solutions for different needs; (2) The structural design of the signal contact terminal on the FPC not only meets the temperature collection requirements of the battery cell, but also saves space, facilitates subsequent installation and welding processes, and improves the energy density of the lithium battery module; (3) The structure of the lithium battery module has been improved to make it compact and have the functions of collecting voltage and cell temperature as well as heating. This has increased the energy density of the battery module, improved its safety performance and endurance performance in low-temperature environments, thereby extending its service life. It is also easy to locate, install and disassemble, which facilitates subsequent maintenance and improves reusability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without creative work.

[0025] Figure 1 This is an assembly diagram of an integrated lithium battery module of the present invention.

[0026] Figure 2 The figure is a schematic structural diagram of an integrated lithium battery module of the present invention.

[0027] Figure 3 It is an exploded view of the circuit integrated component of the present invention.

[0028] Figure 4 It is a schematic diagram of the stacking of the FPC of the present invention.

[0029] Figure 5 It is a schematic diagram of the structure of the FPC of the present invention.

[0030] Figure 6 It is a structural schematic diagram of the signal contact terminal of the present invention.

[0031] Figure 7 It is an assembly diagram of the blister tray and the blister cover of the present invention.

[0032] Figure 8 It is an exploded view of the battery cell integrated assembly of the present invention.

[0033] Fig. 9 It is an assembly diagram of the battery cell integrated component of the present invention.

[0034] In the figure: 1. Circuit integrated component, 11. FPC, 111. Signal contact terminal, 1111. Collection nickel sheet, 1112. Temperature sensing nickel sheet, 112. Connector, 121. Middle bar sheet, 122. First end bar sheet, 123. Second end bar sheet, 124. Circular through hole, 125. Threaded through hole, 13. Blister tray, 131. Cylindrical protrusion, 14. Blister cover, 15. Positioning and mounting hole, 17. FR4, 2. Electrical Core integrated components, 21, battery cell, 211, battery cell pole, 22, side panel, 221, slot, 222, rivet assembly hole, 223, heating film, 224, rivet, 23, end plate, 231, mounting hole, 24, upper cover, 241, buckle, 25, insulating sheet, 26, positive and negative electrode bracket, 261, conical buckle, 262, threaded copper column, 263, buckle slot, 27, positive and negative electrode sheath, 28, reinforcing rib, 29, glue. DETAILED DESCRIPTION

[0035] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0036] The main function of the integrated lithium battery module is to serve as an efficient energy storage device to provide power for various devices, release electrical energy when needed, and be able to be recharged and reused. Figure 1 The figure shows an integrated lithium battery module of the present invention. The lithium battery module adopts a six-sided square design, and the main body is composed of a battery cell integrated component 2 and a circuit integrated component 1. Figure 2 FIG. 1 is a schematic diagram showing the structure of an integrated lithium battery module of the present invention. Figure 2The cell integrated assembly 2 is a rectangular parallelepiped structure, which contains a plurality of cells 21, which are closely placed in a single row. The circuit integrated assembly 1 is located above the cell integrated assembly 2, and is a plate-like structure, which is arranged in contact with the upper surface of the cell integrated assembly 2.

[0037] like Figure 3 The exploded view of the circuit integration component of the present invention is shown. The circuit integration component 1 includes a blister tray 13 and a blister cover 14. The blister cover 14 is located above the blister tray 13, and the lower surface of the blister tray 13 is in close contact with the upper surface of the battery cell 21 in the battery cell integration component 2. A plurality of tabs are installed on the blister tray 13, and a plurality of accommodating grooves for the tabs are provided on the blister tray 13, which is convenient for positioning and installing the tabs, and reduces the vibration or movement of the tabs to a certain extent. A plurality of tabs are placed in a series-parallel relationship between the battery cells 21. Two battery cell poles 211 are provided on the upper surface of each battery cell 21, which are the positive and negative poles of the battery cell 21, respectively. A circular through hole 124 is provided on each tab, and the circular through hole 124 is welded to the battery cell pole 211 below it to prevent uneven contact between the tab and the battery cell pole 211. Figure 3 The middle busbars are placed in two rows, and the circular through holes 124 on the busbars correspond to the positions of the battery poles 211 of the battery cells 21 below.

[0038] The circuit integration assembly 1 also includes FPC 11, which is a single-sided board located between two rows of tabs, and its lower surface is close to the upper surface of the blister tray 13. FPC 11 is provided with a plurality of signal contact terminals 111 placed on the tab surface, and the inside of FPC 11 is wired according to the circuit relationship between the battery cells 21.

[0039] The plurality of tabs include three tabs of different specifications, namely, a middle tab 121, a first end tab 122, and a second end tab 123, wherein only one first end tab 122 and one second end tab 123 are provided. The battery cells 21 are connected in series through the middle tab 121, that is, one middle tab 121 in the figure is respectively connected to the positive pole of one battery cell and the negative pole of another battery cell. The first end tab 122 and the second end tab 123 are respectively arranged at both ends of the blister tray 13, the first end tab 122 is the positive pole of the lithium battery module, and the second end tab 123 is the negative pole of the lithium battery module, that is, the first end tab 122 is connected to the positive pole of the battery cell, and the second end tab 123 is connected to the negative pole of the battery cell. In the above structure, the plurality of battery cells 21 in the battery cell integrated assembly 2 are arranged in series in sequence, and the positive pole of each battery cell is connected to the negative pole of the next battery cell. Several bars are placed according to the above series-parallel relationship between the cells 21, the FPC 11 is wired according to the above circuit relationship between the cells 21, and the cell poles 211 under the bars are welded. This arrangement can increase the total voltage of the lithium battery module while keeping the total capacity unchanged, which is suitable for scenarios requiring higher operating voltage.

[0040] In a preferred embodiment, the plurality of cells 21 in the cell integrated assembly 2 are arranged in parallel, the positive electrodes of all the cells are connected together, and the negative electrodes of all the cells are connected together. A plurality of bars are placed according to the above series-parallel relationship between the cells 21, the inside of the FPC 11 is wired according to the above circuit relationship between the cells 21, and the bars are welded to the cell poles 211 below. This arrangement can increase the total capacity of the lithium battery module while keeping the total voltage unchanged, and is suitable for equipment that requires large current output or long-term operation.

[0041] In another preferred embodiment, several cells 21 in the cell integrated assembly 2 are arranged in a series-parallel combination. This arrangement combines the advantages of series and parallel. The cells are first connected in parallel to increase the capacity, and then these parallel groups are connected in series to increase the voltage, or vice versa. The cells are first connected in series to increase the voltage, and then the series groups are connected in parallel to increase the capacity. Several bars are placed according to the above-mentioned series-parallel relationship between the cells 21, and the inside of the FPC11 is wired according to the above-mentioned circuit relationship between the cells 21, and the cell poles 211 under the bars are welded. This arrangement is very flexible, and the lithium battery module can be customized according to the required voltage and capacity, and the customization process is extremely simple to operate, and only the number and arrangement of several cells 21 in the cell integrated assembly 2 need to be appropriately changed. By changing the number and arrangement of different cells 21, the lithium battery module can be compatible with a variety of capacity and voltage configurations, can meet specific voltage and capacity requirements, and increase the versatility and market competitiveness of lithium battery module products. By combining multiple battery cells 21 together and optimizing the design, the lithium battery module can achieve higher output power and capacity while maintaining a small size and weight for easy carrying.

[0042] The upper end surface of the blister tray 13 is provided with a plurality of cylindrical protrusions 131, wherein two cylindrical protrusions 131 are provided in the receiving groove of each bar. Both the bar and the blister cover 14 are provided with positioning and mounting holes 15 adapted to the cylindrical protrusions 131, wherein each bar is provided with two positioning and mounting holes 15. Through the cooperation of the positioning and mounting holes 15 and the cylindrical protrusions 131, the bar and the blister cover 14 are assembled on the blister tray 13.

[0043] In a preferred embodiment, the first end bar piece 122 and the second end bar piece 123 are partially covered with nickel sheets on one side, thereby preventing direct contact between copper and aluminum to facilitate welding.

[0044] like Figure 4 The figure shows a schematic diagram of the stacking of the FPC of the present invention. The FPC11 stacking is arranged from bottom to top in the order of substrate surface, adhesive surface, circuit surface, circuit protection film, and nickel sheet adhesive. In a preferred embodiment, the substrate surface is made of PI material, and its thickness is set to 50 microns; the adhesive surface is made of ADH material, and its thickness is set to 25 microns; the circuit surface is made of copper material, and its thickness is set to 35 microns; the circuit protection film is a combination of PI material and ADH material, and its thickness is set to 60 microns. By adopting the above-mentioned stacked structure of FPC, while ensuring the performance of FPC, it also saves space and can adapt to complex environments such as humidity or corrosiveness.

[0045] like Figure 5 Shown is a schematic diagram of the structure of the FPC of the present invention, as shown in Figure 6The figure shows a schematic diagram of the structure of the signal contact terminal of the present invention. Several signal contact terminals 111 on the FPC11 are placed on the surface of the bar sheet. The signal contact terminal 111 includes a collection nickel sheet 1111 and a temperature-sensitive nickel sheet 1112. The temperature-sensitive nickel sheet 1112 is integrated with the NTC thermistor on the basis of the collection nickel sheet 1111. The structural design of the signal contact terminal 111 on the FPC11 not only meets the temperature collection requirements of the battery cell, but also saves the occupied space, facilitates the subsequent installation and welding process, and improves the energy density of the lithium battery module. A connector 112 is also provided on the FPC11. The connector 112 is the integrated output terminal of the module, which integrates the signals collected by several signal contact terminals 111 to meet the collection requirements of the electronic control system. FR4 is installed between the connector 112 and the blister tray 13. FR4 is generally used as a PCB substrate and has excellent flame retardancy. The lithium battery module can monitor the temperature and other operating parameters of the lithium battery module through the structural design of the signal contact terminal 111 on the FPC11 combined with the connector 112 to prevent overcharging, over-discharging, short circuit and other potentially dangerous situations. This is crucial to ensuring user safety, especially in large-scale energy storage systems or electric vehicle applications.

[0046] like Figure 7 The figure shows the assembly diagram of the blister tray and the blister cover of the present invention. After the welding of the plurality of tabs on the blister tray 13 and the battery pole 211 is completed, the cylindrical protrusion 131 on the blister tray 13 is aligned with the cylindrical mounting hole on the blister cover 14, and then the blister cover 14 is covered to complete the production of the circuit integrated component 1.

[0047] like Figure 8 The exploded view of the battery cell integrated assembly of the present invention is shown. The battery cell integrated assembly 2 includes a plurality of battery cells 21 tightly arranged in a single row, and the plurality of battery cells 21 are covered with an insulating shell. The insulating shell includes an upper cover 24, two side panels 22, and two end panels 23. The end panels 23, the side panels 22, and the upper cover 24 form a rectangular structure, tightly clamping the internal battery cells 21, wherein the length of the upper cover 24 can be set to any length. The number and arrangement of the plurality of battery cells 21 in the battery cell integrated assembly 2 can be changed. By changing the number and arrangement of different battery cells 21 inside the battery cell integrated assembly 2, and using a bar to connect the battery cells 21 to meet the requirements of series and parallel connection between compatible battery cells, it can be compatible with a variety of capacity and voltage configurations, thereby improving the plasticity of the lithium battery module and paving the way for customized solutions for different needs.

[0048] Among the plurality of battery cells 21 arranged closely in a single row, an insulating sheet 25 is provided between adjacent battery cells 21. Figure 8In the embodiment, the front and back sides of each battery cell 21 are coated with glue in a "Z" shape, and the insulating sheet 25 is fixed in the middle of the adjacent battery cells 21 by glue. The inner side of the end plate 23 and the side plate 22 is also provided with an insulating sheet 25, that is, the insulating sheet 25 is also fixed between the end plate 23 and the battery cell 21 and between the side plate 22 and the battery cell 21 by glue. In addition, the bottom of several battery cells 21 is also fixed with an insulating sheet 25 by glue, that is, the bottom of the battery cell integrated component 2 is adhered with an insulating sheet 25. The provision of the above-mentioned multiple insulating sheets 25 effectively prevents the potential safety hazards caused by leakage of the battery cell 21, thereby ensuring the safety performance of the lithium battery module.

[0049] Since the performance of lithium batteries will be significantly affected by temperature, especially under low temperature conditions, the electrochemical reaction rate inside the battery cell will decrease, which will lead to problems such as reduced battery capacity, reduced output power and reduced charging efficiency. Therefore, a heating film 223 is also provided on the side panel 22 of the lithium battery module. The heating film 223 is made of PI film and heating chip, PI film and double-sided tape stacked in sequence. Two eye-catching white heating film lines extend from the heating film 223 to facilitate the installation of the control end harness. When the lithium battery module is under low temperature conditions, the heating film 223 is controlled to provide the necessary heat for the lithium battery module, so as to reach a more suitable working temperature range. The structural design of the heating film 223 ensures the endurance performance and normal working performance of the lithium battery module under low temperature conditions, while improving the efficiency of the lithium battery module and extending the life of the lithium battery module.

[0050] The tops of the two end plates 23 are also provided with mounting holes 231 for the positive and negative electrode brackets 26. The bottoms of the positive and negative electrode brackets 26 are provided with conical buckles 261 that match the mounting holes 231. The two positive and negative electrode brackets 26 are fixed to the tops of the two end plates 23 by respectively snapping the conical buckles 261 under the two positive and negative electrode brackets 26 into the mounting holes 231 on the tops of the two end plates 23. The centers of the positive and negative electrode brackets 26 are inlaid with threaded copper pillars 262 with threaded holes. The first end bar piece 122 and the second end bar piece 123 in the circuit integrated component 1 are both provided with threaded through holes 125 that match the threaded holes of the threaded copper pillars 262. The threaded through holes 125 and the threaded holes are sequentially inserted with screws to fix the first end bar piece 122 and the threaded copper pillar 262 in the positive electrode bracket, and the second end bar piece 123 and the threaded copper pillar 262 in the negative electrode bracket are fixedly connected. A buckle slot 263 for mounting the positive and negative electrode sheaths 27 is also provided above the positive and negative electrode brackets 26 , and the positive and negative electrode sheaths 27 are fixed to the positive and negative electrode brackets 26 through the buckle slot 263 .

[0051] like Fig. 9The figure shows the assembly diagram of the battery cell integrated component of the present invention. Two pairs of buckles 241 are provided on both sides of the upper cover 24, and the tops of the two side panels 22 are provided with slots 221 that match the buckles 241 at both ends of the upper cover 24. The upper cover 24 is fixedly connected to the two side panels 22 by inserting the buckles 241 of the upper cover 24 into the slots 221 of the two side panels 22. Five rivet assembly holes 222 are evenly provided at both ends of the side panels 22 in the length direction, and five rivet holes that match the rivet assembly holes 222 are evenly provided at both ends of the end panel 23. The end panel 23 and the side panel 22 are fixedly connected by rivets 224, so as to achieve precise assembly between the two side panels and the two end panels 23. The upper cover 24 is fixed to the two side panels 22 by means of buckles 241, and the two end panels 23 are fixed to the two side panels 22 by means of rivets 224, so that the structure of the lithium battery module is sufficiently stable and easy to install, which effectively improves the assembly efficiency, and at the same time makes it easier to disassemble the lithium battery module, which is convenient for the repair and maintenance of the lithium battery module, thereby improving the reusability of the lithium battery module. The insulating shell fastened by rivets 224 and buckles 241 clamps the internal battery cells 21, and multiple battery cells 21 can be fixed without using cable ties. Three reinforcing ribs 28 are also evenly arranged on the side panels 22, and the end panels 23 are provided with reinforcing ribs 28 that are staggered horizontally and vertically. The design of the reinforcing ribs 28 on the side panels 22 and the end panels 23 improves the overall strength of the battery cell integrated assembly 2 and effectively reduces the deformation that may be caused by the expansion of the internal battery cells.

[0052] The lithium battery module is mainly composed of a simple splicing of a battery cell integrated component 2 and a circuit integrated component 1, wherein the circuit integrated component 1 is located above the battery cell in the battery cell integrated component 2 and below the upper cover 24 in the battery cell integrated component 2. Through the fixing effect of the upper cover 24, the connection between the circuit integrated component 1 and the battery cell integrated component 2 is more stable, reducing the possibility of damage to the lithium battery module. In addition, since the length of the upper cover 24 is set to be shorter, the impact on the heat dissipation of the lithium battery module is reduced. The setting of the insulating shell and the insulating sheet 25 in the battery cell integrated component 2 prevents the safety hazard of battery cell leakage to a certain extent, and improves the safety performance of the lithium battery module. The battery cell integrated component 2 can be compatible with a variety of capacity and voltage configurations by changing the number and arrangement of different internal battery cells. The circuit integrated component 1 can be compatible with the series and parallel requirements between battery cells by using a number of bars to connect with the said battery cells, and then the electrical signals of each battery cell are uniformly led out through a number of signal contact terminals 111 provided by FPC11. The structural design of the signal contact terminal 111 not only meets the temperature collection requirements of the battery cell, but also saves the space occupied by the temperature collection structure, which is convenient for subsequent installation and welding processes. When assembling the lithium battery module, first arrange the several battery cells reasonably according to the voltage and capacity requirements of the lithium battery module, and then assemble the battery cell integrated component 2. The lithium battery module in this solution has excellent plasticity, can be upwardly compatible with a variety of capacity and voltage configurations, and achieves ultra-high energy density. By setting multiple positioning and installation structures between the structures, the lithium battery integrated module is easy to position, install and disassemble, which facilitates the subsequent repair and maintenance of the battery module, alleviates the technical problems existing in the prior art that the battery module is welded and riveted, cannot be subsequently modified, and is inconvenient to repair, and simplifies the assembly process.

[0053] An integrated lithium battery module of the present invention has the following advantages. The battery cell integrated component 2 and the circuit integrated component 1 complement each other, and by changing the number and arrangement of different battery cells inside the battery cell integrated component 2, and using the bar to connect the battery cells to meet the requirements of series and parallel connection between the battery cells, it can be compatible with a variety of capacity and voltage configurations, improve the plasticity of the lithium battery module, and pave the way for customized solutions for different needs; the structural design of the signal contact terminal 111 on the FPC11 not only meets the temperature collection requirements of the battery cell, but also saves the occupied space, facilitates the subsequent installation and welding process, and improves the energy density of the lithium battery module; in addition, the structure of the integrated lithium battery module is improved to make it compact, with the functions of collecting voltage and battery cell temperature and heating, which improves the energy density of the battery module, and also improves the safety performance and endurance performance in low temperature environment to a certain extent, thereby extending the service life, and is easy to locate, install and disassemble, which is convenient for subsequent maintenance and improves reusability.

[0054] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural transformation made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. An integrated lithium battery module, characterized in that: It includes a battery cell integrated component and a circuit integrated component. The battery cell integrated component includes an insulating shell and a plurality of battery cells inside. The arrangement of the plurality of battery cells can be changed. The circuit integrated component includes an FPC and a plurality of bars connected to the battery cells. The FPC is provided with a plurality of signal contact terminals placed on the surface of the bars.

2. The integrated lithium battery module according to claim 1, characterized in that: The circuit integration assembly includes a blister tray and a blister cover, the plurality of tabs are mounted on the blister tray and are placed in a series-parallel relationship between the battery cells, and each tab is provided with a circular through hole welded to the battery cell pole.

3. The integrated lithium battery module according to claim 2, characterized in that: The bar piece is provided with three different specifications, including a middle bar piece, a first end bar piece and a second end bar piece. The battery cell is electrically connected through the middle bar piece. The first end bar piece is the positive electrode of the module, and the second end bar piece is the negative electrode of the module.

4. The integrated lithium battery module according to claim 3, characterized in that: The interior of the FPC is wired based on the circuit relationship between the battery cells. A connector is provided on the FPC, and the connector integrates the information collected by the several signal contact terminals. FR4 is installed between the connector and the blister tray. The signal contact terminal includes a collection nickel sheet and a temperature-sensitive nickel sheet. The temperature-sensitive nickel sheet is integrated with the NTC thermistor on the basis of the collection nickel sheet.

5. An integrated lithium battery module according to claim 3, characterized in that: The blister tray is provided with a plurality of cylindrical protrusions, and the tab and the blister cover are provided with positioning and mounting holes, and the tab and the blister cover are assembled on the blister tray through the cooperation of the positioning and mounting holes and the cylindrical protrusions.

6. An integrated lithium battery module according to any one of claims 3 to 5, characterized in that: The first end bar and the second end bar are partially single-sidedly coated with nickel sheets, and the FPC stack is arranged in sequence according to the substrate surface, the adhesive surface, the circuit surface, the circuit protection film, and the nickel sheet adhesive.

7. The integrated lithium battery module according to claim 1, characterized in that: The insulating shell includes an upper cover, two side plates and two end plates. The end plates, side plates and upper cover form a rectangular structure that tightly clamps the internal battery cells. Insulating sheets are fixed to the inner sides of the end plates and side plates and between the battery cells using glue, and an insulating sheet is also glued to the bottom of the battery cell integrated assembly.

8. The integrated lithium battery module according to claim 7, characterized in that: The two end plates are provided with mounting holes for the positive and negative electrode brackets, and conical buckles matching with the mounting holes are provided below the positive and negative electrode brackets. A threaded copper column with a threaded hole is inlaid in the center of the positive and negative electrode brackets, and threaded through holes matching with the threaded holes are provided on the first end bar piece and the second end bar piece, and buckle grooves for installing positive and negative electrode sheaths are provided above the positive and negative electrode brackets.

9. An integrated lithium battery module according to claim 7 or 8, characterized in that: The upper cover is provided with two pairs of buckles on the side, the side panels are provided with slots that cooperate with the buckles, the side panels are provided with reinforcing ribs, the end panels are provided with reinforcing ribs that are staggered horizontally and vertically, and rivet assembly holes for assembling with the end panels are provided on both sides of the side panels in the length direction.

10. The integrated lithium battery module according to claim 7, characterized in that: The side plate is provided with a heating film, which is made by stacking a PI film and a heating chip, and a PI film and a double-sided adhesive in sequence.

Images