Battery module

Abstract

The utility model discloses a kind of battery module, it is related to battery technical field, battery module includes mounting bracket, electric core component and circuit board component, the mounting bracket forms installation space, the installation space includes the first installation cavity and second installation cavity extending along first direction, the first installation cavity and the second installation cavity are adjacent along second direction setting, the first direction and the second direction are perpendicular;The electric core component includes first electric core and multiple second electric core, multiple the first electric core is closely arranged in the first installation cavity along the first direction;Multiple the second electric core is closely arranged in the second installation cavity along the second direction;The circuit board component includes two substrates, two ends of the installation space are set to be open, two the substrate is separately arranged at the two ends of the installation space and with the first electric core and second electric core abut;The utility model optimizes battery module space layout and improves the assembly efficiency of battery module.

Description

Technical Field

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

[0002] Lithium-ion batteries, as the mainstream energy storage component, have diverse structural forms, encompassing four main categories: plastic-cased, steel-cased, cylindrical, and pouch cells. Among them, pouch cells, with their high energy density, excellent safety performance, slim size, and flexible design, have rapidly penetrated the fields of electric vehicles, centralized energy storage, and electric bicycles. In the specific scenario of electric two-wheeled vehicles, pouch cells are typically directly fixed inside the battery casing; however, as the number of cells in series increases, the module length extends significantly, making it difficult to smoothly embed them into the battery cavity reserved in the vehicle. This size discrepancy directly increases the assembly difficulty and adversely affects the overall vehicle space layout, weight distribution, and mass production efficiency. Utility Model Content

[0003] The main purpose of this utility model is to propose a battery module that optimizes the spatial layout of the battery module.

[0004] To achieve the above objectives, the battery module proposed in this utility model includes:

[0005] The mounting bracket forms a mounting space, which includes a first mounting cavity and a second mounting cavity extending along a first direction. The first mounting cavity and the second mounting cavity are arranged adjacent to each other along a second direction, and the first direction and the second direction are perpendicular to each other.

[0006] A battery cell assembly, comprising a first battery cell and a plurality of second battery cells, wherein the plurality of first battery cells are closely arranged in a first mounting cavity along a first direction; and the plurality of second battery cells are closely arranged in a second mounting cavity along a second direction.

[0007] A circuit board assembly comprising two substrates, wherein the two ends of the mounting space are open, and the two substrates are respectively disposed at the two ends of the mounting space and abut against the first battery cell and the second battery cell.

[0008] In one embodiment, the mounting frame includes a plurality of frame bodies spaced apart along the length of the battery cell assembly, the plurality of frame bodies forming the mounting space.

[0009] In one embodiment, the number of the frame is three, and the three frame are arranged sequentially at intervals along the length direction of the cell assembly. The two frame members arranged on the outer side form grooves with the corresponding two substrates.

[0010] In one embodiment, the substrate has a plurality of first vias and a plurality of second vias. The number of first vias is the same as the number of first cells and is configured in a one-to-one correspondence. The number of second vias is the same as the number of second cells and is configured in a one-to-one correspondence. The two tabs of the first cells pass through the corresponding two first vias, and the two tabs of the second cells pass through the corresponding two second vias.

[0011] In one embodiment, the inner walls of both the first via and the second via are connected to conductive sheets.

[0012] In one embodiment, the conductive sheet is a copper sheet.

[0013] In one embodiment, the frame includes a first side panel and a second side panel that are connected to each other. A corner is formed at the connection between one end of the first side panel and one end of the second side panel. The first side panel forms the first mounting cavity, and the second side panel forms the second mounting cavity.

[0014] In one embodiment, the two frames located on the outer side are further provided with stop ribs, the stop ribs being located at the junction of the first side wall and the second side wall, and the two ends of the stop ribs being connected to the first side wall and the second side wall respectively.

[0015] In one embodiment, both stop ribs are disposed on opposite sides of the corresponding two frames.

[0016] In one embodiment, the mounting bracket is made of plastic.

[0017] In the technical solution of this utility model, the bidirectional compact arrangement of battery cells is achieved by vertically setting the first and second mounting cavities. The substrate and the corresponding first and second battery cells abut against each other, which effectively solves the problem of difficult battery module assembly. It has the advantages of optimizing the spatial layout of battery modules and improving assembly efficiency. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of an embodiment of the battery module provided by this utility model;

[0020] Figure 2 for Figure 1 A schematic diagram of the structure of the central frame.

[0021] Explanation of icon numbers:

[0022] 100. Battery module; 1. Mounting bracket; 2. Cell assembly; 3. Substrate; 11. Mounting space; 111. First mounting cavity; 112. Second mounting cavity; 21. First cell; 22. Second cell; 12. Frame; 4. Groove; 31. First through hole; 32. Second through hole; 33. Conductive sheet; 121. First side panel; 122. Second side panel; 123. Corner; 123. Stop rib.

[0023] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0025] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, and back), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0026] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. 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 by this utility model.

[0027] Please refer to Figure 1 and Figure 2This utility model proposes a battery module 100, which includes a mounting frame 1, a cell assembly 2, and a circuit board assembly. The mounting frame 1 forms a mounting space 11, which includes a first mounting cavity 111 and a second mounting cavity 112 extending along a first direction. The first mounting cavity 111 and the second mounting cavity 112 are arranged adjacent to each other along a second direction, and the first direction and the second direction are perpendicular. The cell assembly 2 includes a first cell 21 and a plurality of second cells 22. The plurality of first cells 21 are closely arranged in the first mounting cavity 111 along the first direction. The plurality of second cells 22 are closely arranged in the second mounting cavity 112 along the second direction. The circuit board assembly includes two substrates 3. The two ends of the mounting space 11 are open. The two substrates 3 are respectively disposed at the two ends of the mounting space 11 and abut against the first cell 21 and the second cell 22.

[0028] In this embodiment, the first direction is Figure 1 The left and right directions shown, the second direction is Figure 1 The front-back direction is shown in the diagram. Mounting frame 1 refers to the frame structure that forms the mounting space 11. The first mounting cavity 111 and the second mounting cavity 112 refer to the accommodating spaces that extend in the left-right direction. The first mounting cavity 111 and the second mounting cavity 112 are spaced apart in the front-back direction. The substrate 3 can be a circuit board, specifically a rigid PCB board.

[0029] Specifically, the first battery cell 21 is closely arranged in the first mounting cavity 111 along the left-right direction, and the second battery cell 22 is arranged in the second mounting cavity 112 along the front-back direction, forming an L-shaped layout. The openings at both ends of the mounting space 11 allow the substrate 3 to directly contact the end face of the battery cell. When the substrate 3 is installed in place, the battery cell is clamped between the substrate 3 and the mounting bracket 1, and the tabs are naturally aligned with the through holes of the substrate 3.

[0030] Compared with existing technologies, traditional modules use cells arranged in a single direction, resulting in excessive length. This application shortens the module's size in critical directions by vertically arranging cells in separate cavities. In existing technologies, free stacking of cells easily leads to positional deviations. This application, through the cooperative constraint of the substrate 3 and the mounting bracket 1, enables the cells to automatically align and position during assembly.

[0031] Through the above technical solution, this application effectively shortens the overall length of the battery module 100 in the vehicle installation direction, making it possible for the module to adapt to narrow and long battery compartments. The directional arrangement of the cells in the mounting cavity, combined with the rigid positioning of the substrate 3, eliminates the cumulative offset of the tabs during the stacking process, ensuring that the tabs accurately pass through the through holes of the substrate 3. The design of the open ends of the module and their fit with the substrate 3 simplifies the assembly process, allowing the cells to be arranged and fixed without additional positioning fixtures.

[0032] In one embodiment, the mounting frame 1 includes a plurality of frame bodies 12 spaced apart along the length direction of the battery cell assembly 2, and the plurality of frame bodies 12 form an installation space 11.

[0033] The length direction of the battery cell assembly 2 is as follows: Figure 1 As shown in the diagram, multiple frames 12 are spaced apart in the vertical direction to form an installation space 11. Each frame 12 is an independently formed support structure, specifically an L-shaped frame with a first side panel 121 and a second side panel 122, formed by injection molding, to accommodate the first battery cell 21 and the second battery cell 22, respectively. The spaced arrangement means that gaps are maintained between the multiple frames 12 in the vertical direction, which can be uniformly or non-uniformly distributed. The width of the gaps can be adjusted according to heat dissipation requirements. Specifically, the installation space 11 is formed by multiple independent frames 12 in segments, with each frame 12 partially fixing the first battery cell 21 and the second battery cell 22. For example, three frames 12 are arranged sequentially and spaced apart along the length of the battery cell, with the two outer frames 12 located near the two ends of the installation space 11, and the middle frame 12 located in the center of the installation space 11. The first side panel 121 and the second side panel 122 of each frame 12 form the partial boundaries of the first mounting cavity 111 and the second mounting cavity 112, respectively, and the gaps between adjacent frames 12 form heat dissipation channels. Thus, multiple frames 12 together constrain the stacking direction of the battery cells, while reducing the overall material usage of the mounting frame 1.

[0034] In one embodiment, there are three frames 12, which are arranged sequentially and spaced apart along the length of the cell assembly 2. The two outer frames 12 form grooves 4 with the corresponding two substrates 3. Having three frames 12 means that three support structures are arranged along the length of the cell assembly 2, with the middle frame 12 providing the main support and the two outer frames 12 forming positioning structures with the substrates 3. This arrangement ensures support strength while reducing material redundancy and avoiding increased weight due to too many frames 12. The groove 4 is a U-shaped or rectangular groove structure formed by the outer frames 12 and the substrates 3. Adhesive can be poured into the groove 4, flush with the frame 12, to achieve insulation.

[0035] Specifically, three frames 12 are arranged at intervals along the vertical direction. The middle frame 12 provides support for the middle part of the battery cell assembly 2, while the two outer frames 12 respectively cooperate with the substrates 3 at both ends to form grooves 4. The adhesive is injected through the openings of the grooves 4 to fill the internal space, and forms a sealing layer after curing. The spaced-out frames 12 avoid stress concentration caused by the continuous structure, and the cooperation structure between the outer frames 12 and the substrates 3 provides directional guidance for the adhesive pouring, preventing the adhesive from overflowing.

[0036] In one embodiment, the substrate 3 has a plurality of first vias 31 and a plurality of second vias 32. The number of first vias 31 is the same as the number of first cells 21 and they are arranged in a one-to-one correspondence. The number of second vias 32 is the same as the number of second cells 22 and they are arranged in a one-to-one correspondence. The two tabs of the first cell 21 pass through the corresponding two first vias 31, and the two tabs of the second cell 22 pass through the corresponding two second vias 32.

[0037] The first via 31 refers to a through-hole structure on the substrate 3 designed for the tab of the first battery cell 21. Specifically, it can be implemented using a rectangular or oblong hole, with a diameter slightly larger than the width of the tab to allow the tab to pass through while limiting lateral offset. The second via 32 refers to a through-hole structure on the substrate 3 designed for the tab of the second battery cell 22. Specifically, it can be implemented using a rectangular or oblong hole, with its length direction aligned with the arrangement direction of the second battery cells 22 to accommodate the tab extension path. A one-to-one correspondence means that the tab hole position of each battery cell has independent and fixed position coordinates on the substrate 3. For example, the spacing of the first via 31 is equal to the arrangement spacing of the first battery cells 21, and the spacing of the second via 32 is equal to the arrangement spacing of the second battery cells 22, thus forming a position locking relationship.

[0038] Specifically, when the first battery cell 21 is closely arranged along the first direction, the positional deviation of its tabs in the second direction is constrained by the first via 31. Each first battery cell 21 has two tabs passing through two separately configured first vias 31. Since the number of vias strictly corresponds to the number of battery cells, the tabs are physically limited by the via walls during passage, preventing lateral displacement. Similarly, when the second battery cell 22 is arranged along the second direction, its tabs pass through the corresponding second vias 32. The via direction is orthogonal to the battery cell arrangement direction, forming a spatial cross-positioning. By assigning the battery cell tabs in different mounting cavities to independent via groups, mutual interference between the tabs of battery cells arranged in multiple directions is avoided. Simultaneously, the open design at both ends of the substrate 3 allows the battery cells to be simultaneously inserted into the vias from both sides, achieving bidirectional positioning assembly.

[0039] Through the above technical solution, this application achieves precise positioning of cell tabs in bidirectional arrangement scenarios, solving the problem of tab eccentricity caused by multi-cell stacking. The one-to-one correspondence between tabs and vias eliminates positional deviations during assembly, enabling tabs to accurately pass through corresponding holes and avoiding via failures or poor connections caused by tab misalignment. Simultaneously, the independent via group simplifies the assembly process, allowing operators to quickly identify the corresponding via group based on the cell arrangement direction, significantly improving module assembly efficiency.

[0040] In one embodiment, conductive sheets 33 are connected to the inner walls of both the first via 31 and the second via 32. The conductive sheet 33 refers to a metallic conductor attached to the inner wall of the via, which can be achieved by welding or embedding copper sheets into the inner wall of the via. Its function is to form a conductive path through direct contact with the battery electrode tab. The inner wall connection refers to the fixed connection between the conductive sheet 33 and the inner surface of the via. This can be achieved by laser welding or crimping processes, and its function is to ensure a stable physical bond between the conductive sheet 33 and the via structure, preventing displacement or detachment.

[0041] Specifically, when the tab of the first battery cell 21 passes through the first via 31, the surface of the tab makes surface contact with the conductive sheet 33. Similarly, when the tab of the second battery cell 22 passes through the second via 32, it also makes surface contact with the conductive sheet 33. The conductive sheet 33 covers the annular area of ​​the inner wall of the via. During the insertion of the tab, even if there is a positional deviation or slight deformation of the tab, the conductive sheet 33 can still maintain the contact area with the tab. As an intermediate conductive medium, the conductive sheet 33 establishes a low-resistance path between the tab and the substrate 3, while providing a stable connection foundation for subsequent welding processes.

[0042] In one embodiment, the conductive sheet 33 is a copper sheet. The copper sheet refers to a thin, sheet-like conductive element made of copper, which can be formed using stamping or cutting processes. Copper has high conductivity and low resistance, reducing the contact resistance between the electrode and the substrate 3. The ductility of the copper sheet allows it to conform to the electrode surface during assembly, compensating for gaps caused by electrode eccentricity or assembly errors. The corrosion resistance of copper allows it to adapt to the internal chemical environment of the battery module 100, preventing a decline in conductivity due to oxidation during long-term use.

[0043] Specifically, copper sheets are fixed to the inner walls of the first via 31 and the second via 32 as a conductive medium. When the tabs of the first battery cell 21 and the second battery cell 22 pass through the corresponding vias, the copper sheets make direct contact with the tab surfaces. The high conductivity of copper ensures efficient current transmission between the tabs and the substrate 3, and its low resistance reduces energy loss. The ductility of the copper sheets allows for slight deformation during tab insertion, filling the gap between the tabs and the vias and preventing poor contact due to tab misalignment. The corrosion resistance of copper resists the erosion of electrolytes or gases inside the battery module 100, maintaining a long-term stable conductive interface.

[0044] In one embodiment, the frame 12 includes a first side panel 121 and a second side panel 122 connected to each other. A corner 123 is formed at the connection point between one end of the first side panel 121 and one end of the second side panel 122. The first side panel 121 forms a first mounting cavity 111, and the second side panel 122 forms a second mounting cavity 112. Specifically, the first side panel 121 extends in a left-right direction to form a straight mounting channel, and the second side panel 122 forms another independent mounting channel. When the first battery cell 21 is arranged in the first mounting cavity 111 along a first direction, the second battery cell 22 can be arranged in the second mounting cavity 112 along a second direction. The corner 123 allows for the placement of components such as plugs and antennas above the corner 123 after the battery module 100 is installed in the battery box, thereby reducing the size of the battery pack and saving space.

[0045] In one embodiment, the two outer frames 12 are further provided with stop ribs 123. Both stop ribs 123 are located on opposite sides of the corresponding two frames 12, at the junction of the first sidewall 121 and the second sidewall 122, with both ends of the stop ribs 123 connected to the first sidewall 121 and the second sidewall 122 respectively. By providing the stop ribs 123, the substrate 3 can be limited and stopped, thereby limiting the vertical movement of the first battery cell 21 and the second battery cell 22. The fact that both stop ribs 123 are located on opposite sides of the corresponding two frames 12 means that the stop ribs 123 are located at the opening of the corresponding groove 4, which avoids occupying internal space of the mounting cavity, allowing the overall length of the module to be compressed.

[0046] In one embodiment, the mounting bracket 1 is a plastic component. The plastic component refers to a support structure manufactured using a polymer material through injection molding, specifically polypropylene or nylon. The elastic deformation capability of the plastic material allows for slight deformation compensation during battery cell assembly. Furthermore, the plastic material itself possesses insulating properties, preventing short circuits between the first battery cell 21 and the second battery cell 22 and the bracket.

[0047] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A battery module, characterized in that, include: The mounting bracket forms a mounting space, which includes a first mounting cavity and a second mounting cavity extending along a first direction. The first mounting cavity and the second mounting cavity are arranged adjacent to each other along a second direction, and the first direction and the second direction are perpendicular to each other. A battery cell assembly, comprising a first battery cell and a plurality of second battery cells, wherein the plurality of first battery cells are closely arranged in a first mounting cavity along a first direction; and the plurality of second battery cells are closely arranged in a second mounting cavity along a second direction. A circuit board assembly comprising two substrates, wherein the two ends of the mounting space are open, and the two substrates are respectively disposed at the two ends of the mounting space and abut against the first battery cell and the second battery cell.

2. The battery module as described in claim 1, characterized in that, The mounting frame includes multiple frames spaced apart along the length of the battery cell assembly, and the multiple frames form the mounting space.

3. The battery module as described in claim 2, characterized in that, The number of frames is three, and the three frames are arranged at intervals along the length of the battery cell assembly. The two frames on the outer side form grooves with the corresponding two substrates.

4. The battery module as described in claim 3, characterized in that, The substrate has multiple first vias and multiple second vias. The number of first vias is the same as the number of first cells and they are set in a one-to-one correspondence. The number of second vias is the same as the number of second cells and they are set in a one-to-one correspondence. The two tabs of the first cell pass through the corresponding two first vias, and the two tabs of the second cell pass through the corresponding two second vias.

5. The battery module as described in claim 4, characterized in that, The inner walls of both the first and second vias are connected to conductive sheets.

6. The battery module as described in claim 5, characterized in that, Its features are, The conductive sheet is a copper sheet.

7. The battery module as described in claim 2, characterized in that, The frame includes a first side panel and a second side panel that are connected to each other. A corner is formed at the connection between one end of the first side panel and one end of the second side panel. The first side panel forms the first mounting cavity, and the second side panel forms the second mounting cavity.

8. The battery module as described in claim 7, characterized in that, The two frames located on the outer side are also provided with stop ribs. The stop ribs are located at the junction of the first side wall and the second side wall, and the two ends of the stop ribs are respectively connected to the first side wall and the second side wall.

9. The battery module as described in claim 8, characterized in that, Both of the aforementioned stop ribs are located on opposite sides of the corresponding two frames.

10. The battery module as described in any one of claims 1 to 9, characterized in that, The mounting bracket is made of plastic.

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