Battery cell connection device and battery module

Abstract

The present invention provides a battery cell connection device and a battery module thereof. [Solution] The battery cell connection device and battery module provided by this invention include a plurality of support frames 20 and a plurality of corresponding conductive pieces 30. The conductive pieces can be installed in corresponding receiving grooves 21 on the upper surface of the support frames and are installed in combination with a pressure plate 10. At least one fixing component 40 is passed through the pressure plate, the tab leads 71 ​​of the battery cells 70, the conductive pieces, and corresponding mounting holes in the support frames in that order, and the tab leads and the conductive pieces are brought into contact and fixed in a compressive manner. The fixing component is removably fixed, making it easy to remove when replacing battery cells. At the same time, it eliminates the problem of destructively removing multiple battery cells, greatly improving assembly safety and maintenance convenience.

Description

[Technical Field]

[0001] The present invention relates to a connection device, and more particularly to a battery cell connection device and its battery module that can be fixed or removed non-destructively. [Background technology]

[0002] As the new energy vehicle market develops vigorously, the traction battery has become one of the three core technologies in new energy electric vehicles, and the structural protection design of the traction battery and its temperature management plan are considered to be very important parts of new energy electric vehicles. Furthermore, in order to increase the driving range of new energy electric vehicles, there is an inevitable trend toward demand for lighter weight and higher energy density.

[0003] For battery cells with tab leads located on both sides, the existing common series connection procedure involves stacking the battery cells, then using a frame with multiple slots on both sides, and bending the tab leads protruding from the battery cells through the corresponding slots. Laser welding is then used to weld the different tab leads to the conductive bus bars of the frame. After the tab leads are welded to the conductive bus bars, if they need to be removed to replace or maintain the battery cells, the tab leads and the conductive bus bars must be separated using a destructive method such as desoldering. This inevitably destroys the tab leads, making the battery cell unusable again. In addition, with the demand for higher energy density and lighter weight, the area of ​​battery cells is increasing and their thickness is gradually decreasing. However, due to limitations in welding technology, it is not possible to adjust the overall height to match the thinner battery cells. However, the spacing between the slots in the frame still needs to be a certain height, so that they can be welded to the tab leads by laser welding. In this way, the arrangement of the battery cells is greatly limited, with the associated inability to continue increasing the overall energy density.

[0004] Furthermore, the procedure involves simultaneously threading the tab leads on one side of the battery cell through the corresponding slots in the frame, and similarly threading the tab leads on the other side of the battery cell through the slots in the other frame. Before and after the tab leads are passed through the slots, they both sag due to gravity, increasing the risk of them coming into contact with each other and causing a short circuit. The tab lead is bent and attached to the frame, and then subsequently welded to the conductive bus bar in the bent direction. Simultaneous assembly is quite inconvenient and does not improve the overall efficiency of the manufacturing process.

[0005] To solve this problem, the applicant has filed Republic of China Application No. 112211125. This device combines two fixed frames to form a sliding cavity, a plurality of support frames that are movable within the sliding cavity, and conductive pieces on the support frames. The adjacent support frames and conductive pieces sandwich the tab leads of the stacked battery cells, and the tab leads and conductive pieces are welded together to achieve a sliding assembly. However, although this connection method certainly solves the problem of difficult welding, it still belongs to the category of connection and fixing method using laser welding, and since risk factors such as high heat, dust, inert gas, and laser light are generated during the laser welding process, it poses a considerable risk to workers. Once a battery cell deteriorates or fails and needs to be replaced, all battery cells stacked above the deteriorated or failed battery cell must be removed. However, because welding is used, the battery cells must be removed in a destructive manner, which damages the tab leads. Furthermore, because the removal is destructive, the associated parts are also destroyed and cannot be reused, which significantly increases maintenance costs.

[0006] Based on the shortcomings of the above-mentioned existing technology, the present invention presents a battery cell connection device, which effectively solves the above-mentioned problems. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Republic of China Application No. 112211125 Summary of the Invention [Problem to be solved by the invention]

[0008] The primary objective of this invention is to provide a battery cell connection device and a battery module using the same. The battery cell tab leads are secured by combining assembly components such as a retaining plate, conductive strips, and a support frame with removable fixing parts. This increases convenience when battery cells need replacement or maintenance due to deterioration or abnormality, and further reduces the maintenance and replacement costs of module parts. [Means for solving the problem]

[0009] The battery cell connection device disclosed in this invention is applicable to battery cells having tab leads at both ends, each tab lead having at least one conductive through-hole. The battery cell connection device includes a support frame, a conductive piece, a presser plate, and at least one fixing component. The support frame has an upper surface with a receiving groove, and the receiving groove has at least one first bottom mounting hole. The conductive piece is correspondingly mounted in the receiving groove of the support frame, and the conductive piece has at least one first fixing hole corresponding to the first bottom mounting hole of the support frame. The presser plate is disposed above the tab leads, and the tab leads of the battery cell are sandwiched and fixed between the conductive piece and the presser plate. The presser plate has at least one top through-hole corresponding to the conductive through-hole of the tab lead. The fixing component is passed through the top through-hole of the presser plate, the conductive through-hole of the tab lead, the first fixing hole of the conductive piece, and the first bottom mounting hole of the support frame in order to compress the tab lead to contact and fix it to the conductive piece, maintaining their electrical connection. The fixing parts can be removable parts such as screws, blind rivets, or rivet nuts, which utilize a non-destructive removal fixing mechanism. When the battery cell needs to be replaced, it can be removed non-destructively and can be replaced immediately. Laser welding not only eliminates the risks to workers and the environment during the processing process, but also allows the battery cell and related parts to be repeatedly maintained or reused after removal, significantly reducing maintenance costs.

[0010] In addition, the present invention discloses a battery module including a plurality of battery cells, with tab leads of the battery cells secured using a plurality of battery cell connection devices. Support frames and conductive pieces are stacked in order, and corresponding fastening components are used to establish electrical connections. Therefore, when a battery cell needs to be maintained or replaced, the fastening components can be removed and replaced non-destructively, avoiding the difficult situation of destructively removing all the battery cells above it, which is required when connecting or fastening using known welding.

[0011] The present invention will be described in detail below with specific examples, so that the objectives, technical contents, features and effects achieved thereby of the present invention can be more easily understood. [Brief explanation of the drawings]

[0012] [Figure 1A] 1 is an exploded schematic view of a battery cell connection device according to the present invention; [Figure 1B] 1 is a schematic assembly diagram of the battery cell connection device of the present invention; [Figure 2A] 1 is an exploded schematic view of another embodiment of the battery cell connection device of the present invention; [Figure 2B] 10 is a schematic assembly diagram of another embodiment of the battery cell connection device of the present invention; FIG. [Figure 2C] 10 is a schematic assembly diagram of another embodiment of the battery cell connection device of the present invention; FIG. [Figure 3] 10 is a schematic diagram of another embodiment of a fixing component in the battery cell connecting device of the present invention; FIG. [Figure 4] 10 is a schematic diagram of another embodiment of a fixing component in the battery cell connecting device of the present invention; FIG. [Figure 5] 1 is a schematic diagram illustrating the assembly of a battery module using the battery cell connection device of the present invention; [Figure 6] 1 is a partially enlarged schematic view of a battery module using the battery cell connection device of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0013] In order to make the advantages, spirit and features of the present invention more easily and clearly understood, the following detailed description and discussion will be given by way of example and with reference to the figures. It should be clearly stated that these examples are merely representative examples of the present invention, and that the embodiments and claims of the present invention are not limited to only the forms of these examples. The purpose of providing these examples is merely to make the disclosure of the present invention more thorough and easily understandable.

[0014] The terms used in the various embodiments disclosed in the present invention are used only for the purpose of describing particular embodiments and are not intended to be limiting of the various embodiments disclosed in the present invention. Unless expressly indicated otherwise, the use of the singular includes the plural. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments disclosed herein belong. The above terms (e.g., terms defined in commonly used dictionaries) are to be construed as having the same meaning as in the context in the same technical field, and are not to be construed as having an idealized or overly formal meaning, unless they are clearly defined in various embodiments disclosed in the present invention.

[0015] In the description of this specification, the term "embodiment," "specific embodiment," etc. means that the combination of specific features, structures, materials, or properties described in the embodiment is included in at least one embodiment of the present invention. In this specification, general references to the above terms do not necessarily refer to the same embodiment. Furthermore, the particular features, structures, materials, or characteristics described may be combined as suitable in any one or more embodiments.

[0016] It should be explained that in the description of the present invention, unless otherwise specified or defined, the terms "coupled", "connected" and "installed" should be understood broadly. For example, the connection may be mechanical or electrical, and may be internal communication between two elements, a direct connection, or a connection via an intermediate medium. Those skilled in the art will understand the specific meaning of the above terms based on the specific circumstances.

[0017] Please refer to Figures 1A-1B, which are exploded and assembled schematic diagrams of the battery cell connection device of the present invention. The battery cell connection device disclosed in this invention mainly includes a pressure plate 10, a support frame 20, a conductive piece 30 and a number of fixing parts 40. The support frame 20 has an accommodation groove 21 on the upper surface thereof, and the accommodation groove 21 has at least one first bottom mounting hole 212 and one second bottom mounting hole 211 . The receiving grooves 21 on the top surface of the support frame 20 are fitted with the corresponding conductive pieces 30, so that the conductive pieces 30 can be received and fixed in the receiving grooves 21. Although the function of the conductive piece 30 is similar to that of a known conductive bus bar, the conductive piece 30 of the present invention does not have the same structure as the known conductive bus bar, and thus can avoid the problems that occur in the background art. The conductive piece 30 of the present invention has a main body connection portion 31 and a side edge connection portion 32 located on the side edge of the conductive piece 30, and the side edge connection portion 32 is located at the corner of the main body connection portion 31 (for example, at the left corner in Figure 1A). In addition, the main body connection portion 31 and the side edge connection portion 32 are electrically connected to each other perpendicularly (for example, the main body connection portion 31 and the side edge connection portion 32 can adopt an integrally molded design, or both the main body connection portion 31 and the side edge connection portion 32 can be formed by welding to form the aforementioned electrical connection). As shown in FIG. 1A, the length of the main body connecting portion 31 is approximately the same as the length of the receiving groove 21, and is installed within the receiving groove 21. The side edge connection portion 32 protrudes and extends from one side of the main body connection portion 31 in both the upper and lower directions in the Z-axis (vertical) direction, and is installed in a rectangular front notch 213 on one side of the storage groove 21 away from the battery cell 70. The height of the side edge connection portion 32 protruding and extending in both the upper and lower directions provides a sufficient installation area for the port 321. Furthermore, the protrusions 312 away from the side edge connection portions 32 are higher than the rest of the main body connection portion 31, and can provide an additional reinforcing support structure in the area of ​​the accommodating groove 21 where assembly components such as the retaining plate 10 and tab lead 71 are not installed, thereby supporting the stress generated by the support frames 20 stacked subsequently and preventing them from deforming and breaking. When assembling this embodiment, the conductive piece 30 is attached in combination with the corresponding second bottom mounting hole 211 in the accommodating groove 21 through the second fixing hole 311 located on both sides of the main body connection portion 31, and is further fixed in the corresponding accommodating groove 21 of the support frame 20 using the first locking part 51 (e.g., a screw, etc.). Of course, the conductive piece 30 and the support frame 20 can be bonded with adhesive, and in this embodiment, there is no need to provide the second fixing hole 311 and the second bottom mounting hole 211 (not shown).

[0018] The battery cell connection device of the present invention is applied to a battery cell 70 having tab leads 71 ​​on both sides (see FIG. 5). For example, in this embodiment, two battery cells 70 are stacked and arranged, and the tab leads 71 ​​on the same side are overlapped. That is, each battery cell 70 has a tab lead 71 of a different polarity at each end, and tab leads 71 ​​of the same polarity can be stacked to form a parallel connection, or tab leads 71 ​​of different polarities can be stacked to form a series connection. In actual assembly, the conductive piece 30 is first accommodated and fixed in the corresponding accommodation groove 21 of the support frame 20, and then the first locking part 51 (e.g., a screw) is passed through the second fixing holes 311 on both sides of the main body connection portion 31 of the conductive piece 30 and fixed to the corresponding second bottom mounting hole 211 in the accommodation groove 21, and then the tab lead 71 after stacking the two battery cells 70 (e.g., the first battery cell and the second battery cell) is placed on the conductive piece 30. Taking a series connection as an example, the two tab leads 71 ​​on the same side of the two stacked battery cells 70 have opposite polarities (for example, positive and negative poles, respectively). The support frame 20 is made of an insulating material, which can prevent short circuits from occurring between the conductive pieces 30 or tab leads 71 ​​on different layers.

[0019] Corresponding to the first bottom mounting hole 212 of the support frame 20, the tab lead 71 has at least one conductive through hole 72, and the main body connecting part 31 of the conductive piece 30 has at least one first fixing hole 33. The tab lead 71 is fixed through the fixing part 40 and electrically connected to the conductive piece 30 . However, the fixing component 40 of the present invention employs non-destructive assembly and removal, for example, in the embodiment of FIGS. 1A-1B, the fixing component 40 is a screw. Since the tab lead 71 is generally a metal piece with a relatively small thickness, for example, if a force is applied or a direct engagement is made with the tab lead 71, the tab lead 71 will likely be deformed or damaged. Therefore, if a presser plate 10 is additionally provided above the tab lead 71, the compressive stress generated when the fixed part 40 is locked is mainly applied to the presser plate 10. Similarly, the presser plate 10 also has an uppermost through-hole 11 that corresponds to the first bottom mounting hole 212 of the support frame 20 . During assembly, the fixing part 40 is passed through the top through-hole 11 of the pressure plate 10, the conductive through-hole 72 of the tab lead 71 of the battery cell 70, the first fixing hole 33 of the main body connection part 31 of the conductive piece 30, and the first bottom mounting hole 212 of the accommodating groove 21 of the support frame 20 in that order and fixed. To enable the fixing part 40 (a screw in this embodiment) to be fixed, a threaded insert 41 can be embedded in the first bottom mounting hole 212 of the support frame 20, so that the fixing part 40 can be inserted and then locked into the first bottom mounting hole 212 of the support frame 20. Therefore, the tab leads 71 ​​and the upper and lower conductive pieces 30 of the multiple battery cells 70 are tightly clamped between the pressure plate 10 and the support frame 20, respectively, so that the tab leads 71 ​​are pressed into contact and fixed with the main body connection portions 31 of the conductive pieces 30, maintaining their electrical connection state.

[0020] As mentioned above, the main function of the pressure plate 10 is to cushion and absorb the stress generated by fixing through the fixing part 40, thereby making the tab lead 71 less likely to deform and maintaining the flatness of the tab lead 71. Furthermore, since it is necessary to protect the tab lead 71 with a certain degree of rigidity, it is preferable to select a material that is somewhat soft and can absorb stress to a certain degree, such as plastic or a metal material (such as stainless steel).

[0021] 2A to 2C, which are exploded and assembled schematic diagrams of another embodiment of the battery cell connection device of the present invention. In this embodiment, in addition to embedding the aforementioned threaded insert 41 in the first bottom mounting hole 212 of the support frame 20, a nut 42 can also be embedded in the first fixing hole 33 of the main body connection part 31 of the conductive piece 30, and the fixing part 40 can be passed through the nut 42 to be locked. Similarly, the tab lead 71 and the conductive piece 30 can be locked and pressed together to achieve an electrical connection state. In the above-described embodiment, the fixing part 40 is made of a screw, which is easy to assemble and disassemble, and has the advantages of low cost, light weight, and reusable.

[0022] See Figure 3. In addition to the above-mentioned embodiment in which the fastening part 40 is a screw, a blind rivet can also be used as the fastening part 40. By adopting blind rivets, it is possible to omit the installation of the threaded inserts described above, and at the same time, the reliability of vibration isolation is relatively high, and furthermore, the number of assembly steps is relatively small, and assembly is quicker. Furthermore, as shown in FIG. 4, a rivet nut can also be used as the fixing part 40. Similarly, the use of rivet nuts makes it possible to eliminate the need for the threaded inserts mentioned above, and they also have relatively high vibration-damping reliability, while at the same time providing better clamping force and making them less likely to loosen or fall off.

[0023] When the present invention is applied to a battery module 60, a plurality of battery cell connection devices are used to fix and electrically connect a plurality of battery cells 70. See also Figures 1A, 5-6. FIG. 5 is a schematic diagram of an assembly in which the battery cell connection device of the present invention is used in a battery module, and FIG. 6 is a partially enlarged schematic diagram of an assembly in which the battery cell connection device of the present invention is used in a battery module. A plurality of battery cells 70 are connected to the conductive pieces 30 via the battery cell connecting device of the present invention. In addition, positioning portions 241 protruding from the top surface are provided diagonally on the top surface of the support frame 20, and positioning grooves 242 are provided at positions corresponding to the positioning portions 241 on the bottom surface of the support frame 20, so that adjacently stacked support frames 20 can be positioned and stacked by the positioning portions 241 and positioning grooves 242. In other words, the positioning portion 241 and the positioning groove 242 provide positioning for stacking and assembling the support frame 20 in the vertical direction of the Z axis, and limit movement in the horizontal direction of the X axis. However, the number of the positioning portions 241 and the positioning grooves 242 can be increased or decreased based on the needs, and the shape and structure of the positioning portions 241 and the positioning grooves 242 can be easily changed. As long as the upper and lower parts of the support frame 20 can be positioned, engaged, and tenon-jointed, there is no limitation to any particular form. The battery module 60 is fixed in the direction perpendicular to the Z axis by passing the second locking parts 52 through all of the support frames 20 using the multiple module fixing holes 23 on both outer sides of the support frames 20.

[0024] Furthermore, the positions of the side edge connection portions 32 of different conductive pieces 30 corresponding to two adjacent support frames 20 are offset from each other, and as shown in Figure 6, the side edge connection portions 32 are located one at the left corner and one at the right corner in sequence. Staggering the side edge connections 32 helps prevent short circuits from occurring. In addition, in order to ensure that the side edge connection portion 32 of the conductive piece 30 is exposed after the support frame 20 is stacked during assembly, a rectangular front notch 213 is provided at a position on one side away from the battery cell 70, which is the position where the side edge connection portion 32 of the conductive piece 30 is to be placed in the accommodating groove 21 of the support frame 20, thereby exposing the side edge connection portion 32 of the conductive piece 30. In other words, a rectangular cutout is provided on the front side of the support frame 20 at one end of the accommodating groove 21 to expose the side edge connection portion 32, and the position of the cutout is located on the left or right side of the conductive piece 30 corresponding to the side edge connection portion 32, and the cutout is provided opposite the left end or right end of the accommodating groove 21. As shown in FIGS. 5 and 6, the side edge connection portions 32 are exposed on the left and right sides of the battery module 60. Since the tab lead 71 and the conductive piece 30 are electrically connected, an external conductor (not shown) can be connected using the port 321 of the side edge connection portion 32 of the conductive piece 30, and various electrical characteristics (including resistance, voltage, etc.) of the corresponding single battery cell 70 can be detected. That is, it can be a connection point for the monitoring and management module of the battery module, and monitors the status of the electrical characteristics of each battery cell 70 in real time.

[0025] In addition, the stacking arrangement of the battery cells 70 can be adjusted by their interconnection and arrangement when viewed from the perspective of the entire battery module 60, in addition to adopting the series connection or parallel connection described above, to form a mixed form of series connection and parallel connection. After the stacking is completed, the top can be protected using an upper case 61, or an external case can be added to the bottom and sides to protect the entire battery structure (not shown), and the battery module 60 assembled using the battery cell connection device of the present invention is completed, as shown in Figures 5 and 6. A heat dissipation material can be placed between the battery cells 70, and the heat dissipation material can be a metal piece (for example, aluminum material), which can improve the heat dissipation effect after the battery cells 70 are stacked. Alternatively, it is possible to add a buffer material between the battery cells 70 to increase the ability of the entire battery module 60 to withstand external impacts.

[0026] 5, the conductive pieces 30 corresponding to the uppermost and lowermost support frames 20 have electrical connection ends 601 and 602 extending outward, respectively, which serve as the power output ends (common positive and negative poles) of the battery module 60. The electrical connection ends 601, 602 extend directly from the conductive piece 30, and the conductive piece 30 is also electrically connected to the tab lead 71 of the adjacent battery cell 70, so that the module can be used to connect various numbers of battery cells in series or in parallel. The electrical connection ends 601, 602 can be located on the same side or on different sides, which can be flexibly adjusted according to needs (shown in FIG. 5 as the same side).

[0027] In summary, the present invention provides a battery cell connection device and its battery module. The pressing plate, the tab leads of the battery cells, and the support frame are directly stacked and attached together with the conductive pieces thereon, and then a non-destructively removable fixing part (e.g., a screw, a blind rivet, a rivet nut, etc.) is passed through the pressing plate, tab leads, conductive pieces, and support frame in order to fix them, thereby electrically connecting the tab leads and conductive pieces. Therefore, when a battery module is constructed, if a single damaged battery cell needs to be replaced, it can be easily and quickly removed without causing any permanent damage, facilitating maintenance and replacement. At the same time, the welding required to stack known battery cells and the associated risk of danger are eliminated.

[0028] However, the above description is merely a preferred embodiment of the present invention and does not limit the scope of the present invention. Therefore, any equivalent changes or modifications made based on the features and spirit described in the scope of the utility model registration claims of the present invention should be included within the scope of the utility model registration claims of the present invention. [Explanation of symbols]

[0029] 10 Retaining plate 11 Top through hole 20 Support Frame 21 Storage groove 211 Second bottom mounting hole 212 First bottom mounting hole 213 Front cutout 23 Module fixing hole 241 Stereotaxic part 242 Stereotactic groove 30 Conductive piece 31 Main unit connection part 311 2nd fixing hole 312 protrusion 32 Side edge connection Port 321 33 1st fixing hole 40 Fixing parts 41 Threaded sleeve 42 Nut 51 First locking part 52 Second locking part 60 Battery Module 601 Electrical connection end 602 Electrical connection end 61 Upper case 70 battery cells 71 Tab Lead 72 Conductive through hole

Claims

1. A battery cell connection device that is applied to a battery cell having tab leads at both ends, each tab lead having at least one conductive through-hole, the battery cell connection device comprising: a support frame having a receiving groove on an upper surface thereof and at least one first bottom mounting hole in the receiving groove; a conductive piece correspondingly mounted in the receiving groove of the support frame, the conductive piece having at least one first fixing hole, the first fixing hole corresponding to the first bottom mounting hole of the support frame; a presser plate provided on the tab lead, the tab lead of the battery cell being sandwiched and fixed between the conductive piece and the presser plate, the presser plate having at least one uppermost through-hole, the uppermost through-hole corresponding to the first fixing hole of the conductive piece and the conductive through-hole of the tab lead; and at least one fixing part that is passed through the top through-hole of the pressing plate, the conductive through-hole of the tab lead, the first fixing hole of the conductive piece, and the first bottom mounting hole of the support frame in that order, and that presses the tab lead to contact and fix the conductive piece, electrically connecting the tab lead to the conductive piece.

2. 2. The battery cell connecting device according to claim 1, wherein the fixing part is a screw, a blind rivet, or a rivet nut.

3. 3. The battery cell connecting device according to claim 2, wherein the fixing part is a screw, and a threaded insert corresponding to the screw is embedded in the first bottom mounting hole of the support frame.

4. 3. The battery cell connecting device according to claim 2, wherein the fixing part is a screw, and a nut corresponding to the screw is embedded in the first fixing hole of the conductive piece.

5. 2. The battery cell connection device according to claim 1, wherein the support frame has at least one second bottom mounting hole, the conductive piece has at least one corresponding second fixing hole, and the conductive piece can be fixed to the support frame by a first locking part.

6. 2. The battery cell connection device of claim 1, wherein the conductive piece has a main body connection portion and a side edge connection portion, the side edge connection portion protruding and extending vertically from one side of the main body connection portion to both the upper and lower sides, the side edge connection portion being installed in a front notch of the accommodating groove, the main body connection portion having a protrusion, and the protrusion being located at a position away from the side edge connection portion on the main body connection portion.

7. a plurality of battery cells each having a tab lead at each end, each tab lead having at least one conductive through hole; a plurality of battery cell connection devices corresponding to the battery cells and used to fasten the plurality of battery cells; Each battery cell connection device is a support frame having a receiving groove on an upper surface thereof and at least one first bottom mounting hole in the receiving groove; a conductive piece correspondingly mounted in the receiving groove of the support frame, the conductive piece having at least one first fixing hole, the first fixing hole corresponding to the first bottom mounting hole of the support frame; a presser plate provided on the tab lead, the tab lead of the battery cell being sandwiched and fixed between the conductive piece and the presser plate, the presser plate having at least one uppermost through-hole, the uppermost through-hole corresponding to the first fixing hole of the conductive piece and the conductive through-hole of the tab lead; at least one fixing part that is passed through the top through-hole of the pressing plate, the conductive through-hole of the tab lead, the first fixing hole of the conductive plate, and the first bottom mounting hole of the support frame in that order, and that presses the tab lead to contact and fix the conductive plate, and electrically connects the conductive plate; The support frame and the battery cells are stacked in order to form a battery module.

8. 8. The battery module according to claim 7, wherein each of the conductive pieces includes a main body connection portion and a side edge connection portion, the side edge connection portion is located at a corner of the main body connection portion, the main body connection portion and the side edge connection portion are electrically connected and perpendicular to each other.

9. The battery module according to claim 8 , wherein the first fixing hole of the conductive piece is provided in the body connecting portion.

10. 10. The battery module of claim 9, wherein the side edge connection portion has a front side and a rear side, the front side and the rear side being opposite to each other, the front side being away from the battery cell and the rear side being adjacent to the battery cell, the front side having a port, the accommodating groove of the support frame having a front notch, the front notch being arranged on one side of the accommodating groove away from the battery cell after the support frames are stacked, the port being exposed to the front of the support frame through the front notch and being used to connect to at least one external conductor.

11. The battery module according to claim 7, wherein each of the support frames has at least one positioning portion and at least one positioning groove, and the support frames can be stacked and positioned relative to each other.

12. 12. The battery module according to claim 11, wherein the at least one positioning portion is located on the upper surface of the support frame and protrudes diagonally, and the at least one positioning groove is located on the bottom surface of the support frame and corresponds to the at least one positioning portion.

13. The battery module according to claim 7 , wherein the conductive pieces corresponding to the uppermost and lowermost support frames each have an electrical connection end extending outward.

14. 8. The battery module according to claim 7, wherein each of the support frames has at least one module fixing hole, and the support frame can be fixed by inserting a second locking part through the module fixing hole.

15. 8. The battery module of claim 7, wherein the conductive piece has a main body connection portion and a side edge connection portion, the side edge connection portion protruding and extending vertically from one side of the main body connection portion to both the upper and lower sides, the side edge connection portion being installed in a front notch of the accommodating groove, the main body connection portion having a protrusion, and the protrusion being located at a position away from the side edge connection portion on the main body connection portion.

Images