Battery connection assembly, battery pack and assembly method

Abstract

The present invention discloses a battery connection assembly, a battery pack and an assembly method, wherein the battery connection assembly of the present invention is provided with electrical connection parts at both ends of the conductive column when in use, and the electrical connection parts are respectively connected to the positive and negative electrodes of the cells of the two cell stacks, and an escape space is formed between the conductive column and the electrical connection parts at both ends of the conductive column, and the escape space is used to escape the support beam, thereby realizing the electrical connection between the cell stacks. In this way, it is possible to avoid designing an escape structure for escaping the support beam on the busbar, simplify the structure of the busbar, and do not need to bypass the support beam, thereby saving the space occupied by the busbar, which is beneficial to improving the space utilization rate of the entire battery pack.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a battery connection component, a battery pack and an assembly method. Background Art

[0002] The energy main body of the battery pack is formed by multiple battery cell stacks connected in series or in parallel, and the series or parallel connection between two adjacent battery cell stacks is electrically connected through a bus. However, in order to ensure the stability of the overall structure of the battery pack, a support beam connected to the battery box is often provided between two adjacent battery cell stacks in the battery box for support. When the positive or negative electrode of the battery cell of one of the two adjacent battery cell stacks is connected to the negative or positive electrode of the battery cell of the other battery cell stack, the bus needs to be a corresponding support beam avoidance structure and needs to bypass the support beam, resulting in the bus occupying space and a complex structure; at the same time, the connection between the existing bus and the battery cell is usually welded or bolted, resulting in a large number of assembly processes for the entire battery pack, which is not conducive to improving the convenience and space utilization of the assembly of the entire battery pack. Summary of the invention

[0003] One of the main purposes of the present invention is to provide a battery connection assembly and a battery pack, aiming to solve the technical problem that the existing bus design avoids the support beam structure and needs to bypass the support beam, resulting in a complex bus structure, occupying space, and not conducive to improving the space utilization of the entire battery pack.

[0004] In order to achieve the above-mentioned objectives, in a first aspect, the present invention provides a battery connection assembly, comprising at least one conductive column, each end of which is provided with an electrical connection part, and the electrical connection part is used for electrical connection between multiple battery cell stacks, wherein an avoidance space is formed between the conductive column and the electrical connection parts at both ends.

[0005] Furthermore, the electrical connection part includes a first connection part and a second connection part, one side of the first connection part is connected to the second connection part, the first connection part is used to connect the end face of the conductive column, and the second connection part is used to connect the pole of the battery cell in the battery cell stack.

[0006] Furthermore, the second connection portions at both ends of the conductive column are respectively located on different sides of the first connection portion.

[0007] Furthermore, the second connecting portion is provided with an inserting portion which is slidably inserted into the pole of the battery cell.

[0008] Furthermore, the plug-in portion includes a pole clamping slot with at least one end being open and a side being provided with a slide groove notch.

[0009] Furthermore, the pole clamping slot is a frustum-shaped cavity, and the opening is arranged at the large end of the frustum-shaped cavity.

[0010] Furthermore, the second connecting portion further comprises a bending section, wherein the bending section is formed by extending one end of the first connecting portion away from the conductive column, one end of the bending section is connected to the first connecting portion, and the other end of the bending section is connected to the plug-in portion.

[0011] Furthermore, the second connecting portion further includes a connecting section, the connecting section is formed by the bending section extending toward the plug-in portion, and the bending section is connected to the plug-in portion through the connecting section.

[0012] Furthermore, the first connecting portion, the bending section, the connecting section and the plug-in portion are integrally formed.

[0013] Furthermore, there are multiple conductive pillars, and the electrical connection part also includes a connecting block, one end of the multiple conductive pillars is connected to one connecting block, and the other end is connected to another connecting block, a side of the connecting block away from the conductive pillar is connected to the first connecting part, and the avoidance space is formed between the conductive pillar and the connecting blocks at both ends.

[0014] Furthermore, the conductive column is connected to the connecting block by riveting.

[0015] Furthermore, it also includes an insulating rubber component, which is arranged on the side wall surface corresponding to the avoidance space.

[0016] A second aspect of the present invention proposes a battery pack, comprising the battery connection assembly described in any of the above embodiments, and also comprising a battery box and multiple groups of battery cell stacks, wherein a support beam is fixed in the battery box, the support beam divides the battery box into multiple accommodating chambers, the battery cell stacks are installed in the accommodating chambers, the support beam is provided with a through hole matching the conductive column, the conductive column passes through the support beam through the through hole, the avoidance space avoids the support beam, and the electrical connection parts at both ends of the conductive column are respectively electrically connected to the poles of the battery cells in the battery cell stack on both sides of the support beam.

[0017] Furthermore, the battery connection assembly includes a plug-in portion that is slidably plugged into a pole of the battery cell, the battery cell stack includes a plurality of battery cells, the battery cells are provided with poles that are adapted to the plug-in portion, and the poles are plugged into the plug-in portion.

[0018] Furthermore, the plug-in portion is a frustum cavity with a side opening, wherein the large end face of the frustum cavity is open, and the opening of the large end face is connected to the side opening of the frustum cavity, and the pole is a frustum adapted to the plug-in portion.

[0019] Furthermore, there are multiple conductive columns, and the electrical connection part also includes a connecting block, one end of the multiple conductive columns is connected to one connecting block, and the other end is connected to another connecting block, and the side of the connecting block away from the conductive column is connected to the first connecting part, and the avoidance space is formed between the conductive column and the connecting blocks at both ends, and accommodating grooves are opened on the relative surfaces of the support beam, and the two connecting blocks are respectively located in the two accommodating grooves.

[0020] A third aspect of the present invention provides a battery pack assembly method for assembling the battery pack described in any of the above embodiments, comprising the following steps:

[0021] S1: inserting the conductive column through the through hole on the support beam;

[0022] S2: fixing the electrical connection parts at both ends of the conductive column respectively;

[0023] S3: When the battery cell stack is placed on both sides of the support beam respectively, the poles of the battery cells in the battery cell stack are adapted to be connected with the electrical connection parts.

[0024] Beneficial effects:

[0025] When the battery connection assembly of the present invention is in use, electrical connection parts are provided at both ends of the conductive column, and the electrical connection parts are respectively connected to the positive and negative electrodes of the cells of the two cell stacks, and an escape space is formed between the conductive column and the electrical connection parts at both ends of the conductive column, and the escape space is used to escape the support beam, thereby realizing the electrical connection between the cell stacks. In this way, it is possible to avoid designing an escape structure on the busbar to escape the support beam, simplify the structure of the busbar, and do not need to bypass the support beam, thereby saving the space occupied by the busbar, which is beneficial to improving the space utilization rate of the entire battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a battery connection assembly of the present invention;

[0027] Figure 2 is a top view of a battery connection assembly of the present invention;

[0028] Figure 3 is a top view of another battery connection assembly of the present invention;

[0029] Figure 4 This is a schematic diagram of the structure of the connection between the conductive column and the connecting block according to an embodiment of the present invention;

[0030] Figure 5 It is a left view of the embodiment of the present invention in which the conductive column is connected to the connecting block;

[0031] Figure 6 for Figure 5Sectional view at AA in the middle;

[0032] Figure 7 It is a schematic diagram of the structure of the battery pack of the present invention;

[0033] Figure 8 is a front view of the battery pack of the present invention;

[0034] Fig. 9 for Figure 8 Sectional view at the middle BB;

[0035] Fig.10 for Fig. 9 Schematic diagram of the enlarged structure at C in the middle;

[0036] Fig.11 It is a schematic diagram of the structure of a support beam according to an embodiment of the present invention.

[0037] Reference numerals in the accompanying drawings:

[0038] 1. Conductive column; 2. Electrical connection part; 21. First connection part; 22. Connection block; 23. Second connection part; 230. Insertion part; 231. Bending section; 232. Connection section; 233. Large end face; 234. Small end face; 3. Avoidance space; 4. Insulating rubber part; 5. Battery box; 6. First battery cell stack; 61. Second battery cell stack; 7. Support beam; 70. Accommodation groove; 71. Through hole; 8. Battery cell; 80. Pole.

[0039] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0040] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0044] Reference Figure 1-10 An embodiment of the present invention provides a battery connection assembly, including at least one conductive column 1, wherein both ends of the conductive column 1 are respectively provided with an electrical connection portion 2, and the electrical connection portion 2 is used for electrical connection between multiple battery cell stacks, wherein an avoidance space 3 is formed between the conductive column 1 and the electrical connection portions 2 at both ends.

[0045] When the battery connection assembly of the present invention is in use, the two ends of the conductive column 1 are provided with electrical connection parts 2, and the electrical connection parts 2 are respectively connected to the positive and negative electrodes of the battery cells 8 of the two battery cell stacks, and an escape space 3 is formed between the conductive column 1 and the electrical connection parts 2 at both ends of the conductive column 1, and the escape space 3 is used to escape the support beam 7, thereby realizing the electrical connection between the battery cell stacks. In this way, it is possible to avoid designing an escape structure for escaping the support beam 7 on the busbar, simplifying the structure of the busbar, and there is no need to bypass the support beam 7, thereby saving the space occupied by the busbar, which is beneficial to improving the space utilization rate of the entire battery pack.

[0046] In order to make it clearer how the two battery stacks are electrically connected, a detailed description is given here: the battery stack generally includes a plurality of battery cells 8, Figure 7 Exemplarily, two groups of battery cell stacks are installed in the battery box 5, and each group of battery cell stacks is provided with a plurality of battery cells 8. The multiple battery cells 8 of each group of battery cell stacks are stacked on each other along the length direction of the support beam 7 and connected in series or in parallel; wherein, the first battery cell stack 6 located on one side of the support beam 7 and the second battery cell stack 61 located on the other side of the support beam 7 need to be electrically connected to form a loop, and the positive or negative electrode of a battery cell 8 in the first battery cell stack 6 needs to be connected to the negative or positive electrode of a battery cell 8 in the second battery cell stack 61.

[0047] Based on this, the electrical connection part 2 at the first end of the conductive column 1 is connected to the positive electrode of a battery cell 8 in the first battery cell stack 6, and the electrical connection part 2 at the second end of the conductive column 1 is connected to the negative electrode of a battery cell 8 in the second battery cell stack 61, so that the series connection between the two battery cell stacks can be achieved; or, the electrical connection part 2 at the first end of the conductive column 1 is connected to the positive / negative electrode of a battery cell 8 in the first battery cell stack 6, and the electrical connection part 2 at the second end of the conductive column 1 is connected to the positive / negative electrode of a battery cell 8 in the second battery cell stack 61, so that the parallel connection between the two battery cell stacks can be achieved.

[0048] It should be noted that the electrical connection part 2 is made of metal, and the connection between the conductive column 1 and the electrical connection part 2 can be made by welding, bolt connection, mortise and tenon connection or other tight connection methods, which are not limited here, as long as the circuit between the conductive column 1 and the electrical connection part 2 is ensured to be conductive. The support beam 7 is made of insulating material or the side wall surface of the avoidance space 3 formed in the battery connection assembly is wrapped with an insulating rubber part 4, so that the conductive column 1 is insulated and penetrated through the support beam 7, so that the battery connection assembly of the present application will not be electrically conductive with the support beam 7, thereby improving the safety performance of the battery pack.

[0049] In the above embodiment, the electrical connection part 2 includes a first connection part 21 and a second connection part 23, one side of the first connection part 21 is connected to the second connection part 23, the first connection part 21 is used to connect the end face of the conductive column 1, and the second connection part 23 is used to connect the pole 80 of the battery cell 8 in the battery cell stack. The large surface of the first connection part 21 is attached to and fixedly connected with the end face of one end of the conductive column 1, and it is preferred that the large surface area of ​​the first connection part 21 is larger than the end face area of ​​the conductive column 1 to improve the stability of the connection; the second connection part 23 can be any shape of structure, such as a columnar, conical, or annular structure, as long as it can be electrically connected to the pole 80, and the connection method between the second connection part 23 and the pole 80 can be plug-in, etc.; in this embodiment, the conductive column 1 and the first connection parts 21 at both ends enclose the avoidance space 3. When in use, the conductive column 1 passes through the support beam 7, and the first connection parts 21 at both ends of the conductive column 1 are respectively located on both sides of the support beam 7, and the support beam 7 occupies the avoidance space 3. The battery connection assembly does not need to bypass the support beam 7 like the bus in the prior art, which is practical and convenient.

[0050] Preferably, the second connection parts 23 at both ends of the conductive column 1 can be located on the same side of the first connection part 21, so that the two second connection parts 23 are arranged opposite to each other, and the battery connection assembly is an axisymmetric structure. Figure 7-9 When in use, the two second connecting parts 23 are arranged side by side, and the battery cell stack connected to the second connecting parts 23 is also located on the same horizontal line, saving space and improving volume utilization; the second connecting parts 23 at both ends of the conductive column 1 can also be located on different sides of the first connecting part 21. In this case, the battery connection assembly is a centrally symmetrical structure. Figure 3 The empty space after the battery cells 8 are stacked in the battery box 5 is used to place electrical components. In practice, the same side or different side design can be selected according to different usage requirements and actual conditions, making the layout more flexible.

[0051] In the above embodiment, the second connecting portion 23 is provided with a plug-in portion 230 that is slidably plugged with the pole 80 of the battery cell 8. Through the design of the plug-in portion 230, the pole 80 can be easily and quickly inserted into the plug-in portion 230 or taken out by sliding, making assembly and maintenance more convenient and quick. The above-mentioned plug-in portion 230 includes a pole slot with at least one end being set as an opening and a slide groove notch being set on the side. In the above embodiment, if the pole 80 is cylindrical, the plug-in portion 230 is a cylindrical cavity with one end opening and adapted to the pole 80, and a slide groove notch is set on the side of the cylindrical cavity to form a pole slot; if the diameter of the pole 80 gradually changes, the plug-in portion 230 is also designed to change accordingly, and the details are shown in the following embodiments.

[0052] Reference Figure 1-2In the above embodiment, the pole clamping slot is a frustum-shaped cavity, and the opening is arranged at the large end of the frustum-shaped cavity. The pole clamping slot is a frustum-shaped cavity with a side opening (slot notch), wherein the large end face 233 of the frustum-shaped cavity is open, and the opening of the large end face 233 is connected to the slot notch of the frustum-shaped cavity, wherein the frustum-shaped cavity can be a truncated cone-shaped cavity, a prism-shaped cavity, etc., and a truncated cone-shaped cavity is preferred in this embodiment. The plug-in portion 230 is a cone with a gradually changing diameter, and the two end faces of the cone are respectively a large end face 233 with a larger diameter and a small end face 234 with a smaller diameter. At least the end face with the largest diameter is open, so that the pole 80 can be inserted into the plug-in portion 230 through the opening of the large end face 233; the setting of the slide groove notch can, on the one hand, avoid the part of the pole 80 connected to the battery shell, so that the part of the pole 80 connected to the battery shell can slide down along the side opening during plugging; on the other hand, the opening of the large end face 233 is connected to the slide groove notch, so that when the plug-in component is plugged into the positive pole 80 or the negative pole 80, the two can be interference fit to provide elastic force, which can improve the connection stability between the plug-in component and the positive pole 80 or the negative pole 80. At the same time, after plugging in, the plug-in portion 230 fits and wraps the pole 80, which improves the stability of current transmission and avoids loose plugging or poor contact. Preferably, the axial cross-section of the frustum along the conductive column 1 is a major arc, which can have a larger contact area with the pole 80, thereby increasing the stability and firmness of the connection.

[0053] In one embodiment, the second connection portion 23 further includes a bending section 231, which is formed by one end of the first connection portion 21 extending away from the conductive column 1, one end of the bending section 231 is connected to the first connection portion 21, and the other end is connected to the plug-in portion 230. The bending section 231 is formed by one end of the connection portion extending away from the conductive column 1, and the bending section 231 is connected to the plug-in portion 230, so that the plug-in portion 230 is away from the support beam 7, the structure is compact, and the volume utilization rate is improved; in another embodiment, the second connection portion 23 may also not have the bending section 231, the length of the conductive column 1 is greater than the thickness of the support beam 7, and the plug-in portion 230 will not contact the support beam 7 to conduct electricity, thereby increasing safety.

[0054] In the above embodiment, the second connection part 23 also includes a connection section 232, and the connection section 232 is formed by the bending section 231 extending toward the plug-in part 230, and the bending section 231 is connected to the plug-in part 230 through the connection section 232. After the pole 80 is inserted into the plug-in part 230, the force-bearing volume of the plug-in part 230 is expanded, and the bending section 231 allows the plug-in part 230 to have a certain bending and deformation margin after expansion, so that the plug-in part 230 has a buffering effect when subjected to force. Preferably, the bending section 231 is perpendicular to the first connection part 21 and the connection section 232, and the connection section 232 is parallel to the first connection part 21, forming a "B"-shaped structure to improve the stability of the mechanical structure.

[0055] In the above embodiment, the first connecting portion 21, the bending section 231, the connecting section 232 and the plug-in portion 230 are integrally formed. As an existing mature process, integral forming can reduce the number of parts required in the assembly process, simplify the manufacturing process, improve production efficiency and reduce production costs. Figure 2 When the plug-in portion 230 is in a cone shape, the bending section 231, the connecting section 232 and the plug-in portion 230 form a "5"-shaped structure, which can distribute the force more evenly, reduce excessive local force, and extend the service life of the battery connection assembly.

[0056] In one embodiment, the number of the conductive posts 1 is multiple, and the electrical connection part 2 further includes a connection block 22. One end of the multiple conductive posts 1 is connected to one connection block 22, and the other end is connected to another connection block 22. The side of the connection block 22 away from the conductive posts 1 is connected to the first connection part 21, and the avoidance space 3 is formed between the conductive posts 1 and the connection blocks 22 at both ends. The multiple conductive posts 1 increase the flow area and enhance the flow capacity of the battery connection assembly; connecting one end of the multiple conductive posts 1 to the same connection block 22 facilitates one-time welding of the connection block 22 and the first connection part 21, avoiding the need for multiple welding of the multiple conductive posts 1 to connect with the first connection part 21, thereby improving production efficiency; preferably, one end of the multiple conductive posts 1 passes through the connection block 22, so that the end face of the conductive post 1 is flush with the large face of the connection block 22, and the first connection part 21 and the end face of the conductive post 1 and the large face of the connection block 22 are all in contact, so that the connection is tighter and more stable.

[0057] In the above embodiment, an avoidance space 3 is formed between the conductive column 1 and the connecting blocks 22 at both ends. When in use, the connecting block 22 is closer to the support beam 7 than the first electrical connecting portion 2. Preferably, the surface of the connecting block 22 facing away from the first connecting member is in contact with the surface of the support beam 7 facing the connecting block 22, so that the conductive column 1 will not move easily after passing through the support beam 7, and the structure of the battery connecting assembly installed on the support beam 7 is more compact.

[0058] In the above embodiment, the conductive column 1 is connected to the connecting block 22 by riveting. The connection between the conductive column 1 and the connecting block 22 is a riveting connection, which can avoid the use of additional fasteners to connect and fix the two, which is faster than welding and fastening. On the one hand, it can save time and cost and improve installation efficiency, and on the other hand, it can avoid the fasteners connecting the conductive column 1 and the connecting block 22 from occupying space.

[0059] In any of the above embodiments, the battery connection assembly further includes an insulating rubber member 4, and the insulating rubber member 4 is disposed on the side wall surface corresponding to the avoidance space 3. The outer periphery of the conductive column 1 and the side of the electrical connection portion 2 close to the conductive column 1 are wrapped with the insulating rubber member 4. When the battery connection assembly includes a connection block 22, only the portion of the conductive column 1 exposed outside the connection block 22, the surface of the connection block 22 facing away from the electrical connection portion 2, and the outer periphery of the connection block 22 need to be wrapped with the insulating rubber member 4, so as to further improve the insulation isolation effect between the battery connection assembly and the support beam 7, thereby improving the safety performance of the battery pack.

[0060] The second aspect of the present invention provides a battery pack, comprising the battery connection assembly described in any of the above embodiments, and also comprising a battery box 5 and a plurality of battery cell stacks, wherein a support beam 7 is fixed in the battery box 5, and the support beam 7 divides the battery box 5 into a plurality of accommodating chambers, and the battery cell stacks are installed in the accommodating chambers, and a through hole 71 matching the conductive column 1 is opened on the support beam 7, and the conductive column 1 passes through the support beam 7 through the through hole 71, and the avoidance space 3 avoids the support beam 7, and the electrical connection parts 2 at both ends of the conductive column 1 are respectively electrically connected to the poles 80 of the battery cells 8 in the battery cell stacks on both sides of the support beam 7. In this way, the battery pack of the present invention can avoid designing an avoidance structure for avoiding the support beam 7 on its busbar, simplifying the structure of the busbar, and eliminating the need to bypass the support beam 7, thereby saving the space occupied by the busbar and improving the space utilization rate of the entire battery pack.

[0061] The support beam 7 is provided with through holes 71 penetrating the opposite surface thereof. Of course, the number of through holes 71 corresponds to the number of conductive posts 1, that is, one conductive post 1 is insulated and penetrated with one through hole 71. In order to insulate the contacting part between the conductive post 1 and the support beam 7, the contacting part between the conductive post 1 and the support beam 7 is provided with an insulating rubber part 4, which is used for insulating and isolating the conductive post 1 and the support beam 7, so as to prevent the battery connection assembly from being electrically conductive with the support beam 7.

[0062] In the above embodiment, the battery connection assembly includes a plug-in portion 230 that is slidably plugged with the pole 80 of the battery cell 8, and the battery cell stack includes a plurality of battery cells 8, and the battery cell 8 is provided with a pole 80 that is adapted to the plug-in portion 230, and the pole 80 is plugged with the plug-in portion 230. The battery pack of the present invention realizes a quick connection between the electrical connection portion 2 and the pole lug of the battery cell 8 by providing a plug-in portion 230 for the pole 80 to be slidably plugged in the electrical connection portion 2. Compared with the traditional welding between the busbar and the battery cell 8, the present invention significantly improves the convenience of assembling the components of the entire battery pack.

[0063] In the above embodiment, the plug-in portion 230 is a frustum cavity with a side opening, wherein the large end face of the frustum cavity is open, and the opening of the large end face is connected to the side opening of the frustum cavity, and the pole 80 is a frustum adapted to the plug-in portion 230. When the plug-in portion 230 is installed in the battery box 5, the inner diameter of the plug-in portion 230 gradually decreases from top to bottom, and the pole 80 is a frustum adapted to the plug-in portion 230, and its diameter also gradually decreases from top to bottom. The plug-in portion 230, as a frustum cavity, not only has the function of clamping the pole 80, but also has the effect of facilitating the separation of the electrical connection portion 2 and the pole 80, thereby facilitating the disassembly and assembly of the electrical connection portion 2 and the battery cell 8.

[0064] In one embodiment, the number of the conductive posts 1 is multiple, and the electrical connection part 2 further includes a connection block 22. One end of the multiple conductive posts 1 is connected to one connection block 22, and the other end is connected to another connection block 22. The side of the connection block 22 away from the conductive post 1 is connected to the first connection part 21. The avoidance space 3 is formed between the conductive post 1 and the connection blocks 22 at both ends. The opposite surfaces of the support beam 7 are provided with a receiving groove 70, and the two connection blocks 22 are respectively located in the two receiving grooves 70. The connection block 22 is installed in the receiving groove 70 to avoid the connection block 22 being exposed outside the support beam 7 and occupying space, thereby improving the space utilization rate of the entire battery pack.

[0065] A third aspect of the present invention provides a battery pack assembly method for assembling the battery pack described in any of the above embodiments, comprising the following steps:

[0066] S1: inserting the conductive column 1 through the through hole 71 on the support beam 7;

[0067] S2: fixing the electrical connection parts 2 at both ends of the conductive column 1;

[0068] S3: When the battery cell stack is placed on both sides of the support beam 7 respectively, the poles 80 of the battery cells 8 in the battery cell stack are adapted to be connected with the electrical connection part 2 .

[0069] Reference Fig.11 , the conductive column 1 is passed through the through hole 71 on the support beam 7, and the electrical connection part 2 is fixedly connected at both ends of the conductive column 1; when the battery stack is placed on both sides of the support beam 7, the pole 80 of the battery 8 in the battery stack is adapted to connect with the electrical connection part 2 to achieve electrical connection between the batteries in the two accommodating cavities. Preferably, the conductive column 1 is riveted to the support beam 7, which is more firmly connected, so that the battery connection assembly is riveted to the support beam 7 of the battery box 5; the electrical connection part 2 is welded at both ends of the conductive column 1, which is more efficient.

[0070] In another embodiment, when there are multiple conductive posts 1, the battery connection assembly further includes a connection block 22, and before the step of respectively fixing the two ends of the conductive post 1 to the electrical connection portion 2, the step further includes: respectively fixing the two ends of the conductive post 1 to the connection block 22. By riveting one end of multiple conductive posts 1 to the same connection block 22 at one time, and then welding the connection block 22 to the electrical connection portion 2, the structure is firm and the assembly efficiency is improved.

[0071] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A battery connection assembly, characterized in that: The battery comprises at least one conductive column, each of the two ends of which is provided with an electrical connection part, and the electrical connection part is used for electrical connection between multiple battery cells, wherein an escape space is formed between the conductive column and the electrical connection parts at both ends; the conductive column is used to penetrate the support beam in the battery box, and the escape space is used to escape the support beam, thereby realizing electrical connection between battery cell stacks; Among them, the support beam is used to divide the battery box into multiple accommodating cavities, the accommodating cavities are used to install the battery cell stack, the support beam is provided with a through hole matching the conductive column, the conductive column passes through the support beam through the through hole, and the electrical connecting parts at both ends of the conductive column are used to electrically connect to the poles of the battery cells in the battery cell stack on both sides of the support beam respectively.

2. The battery connection assembly according to claim 1, characterized in that: The electrical connection portion includes a first connection portion and a second connection portion, one side of the first connection portion is connected to the second connection portion, the first connection portion is used to connect to the end surface of the conductive column, and the second connection portion is used to connect to the pole of the battery cell.

3. The battery connection assembly according to claim 2, characterized in that: The second connection portions at both ends of the conductive column are respectively located at different sides of the first connection portion.

4. The battery connection assembly according to claim 2, characterized in that: The second connecting portion is provided with an inserting portion which is slidably inserted into the pole of the battery cell.

5. The battery connection assembly according to claim 4, characterized in that: The plug-in portion comprises a pole clamping slot with at least one end being open and a side being provided with a slide groove notch.

6. The battery connection assembly according to claim 5, characterized in that: The pole clamping slot is a frustum-shaped cavity, and the opening is arranged at the large end of the frustum-shaped cavity.

7. The battery connection assembly according to claim 4, characterized in that: The second connection portion further includes a bending section, which is formed by extending one end of the first connection portion away from the conductive column, one end of the bending section is connected to the first connection portion, and the other end is connected to the plug-in portion.

8. The battery connection assembly according to claim 7, characterized in that: The second connecting portion further includes a connecting section, which is formed by the bending section extending toward the plug-in portion, and the bending section is connected to the plug-in portion through the connecting section.

9. The battery connection assembly according to claim 8, characterized in that: The first connecting portion, the bending section, the connecting section and the plug-in portion are integrally formed.

10. The battery connection assembly according to claim 2, characterized in that: There are multiple conductive pillars, and the electrical connection part also includes a connecting block. One end of the multiple conductive pillars is connected to one connecting block, and the other end is connected to another connecting block. A side of the connecting block away from the conductive pillar is connected to the first connecting part, and the avoidance space is formed between the conductive pillar and the connecting blocks at both ends.

11. The battery connection assembly according to claim 10, characterized in that: The conductive column is connected to the connecting block by riveting.

12. The battery connection assembly according to any one of claims 1 to 11, characterized in that: It also includes an insulating rubber part, which is arranged on the side wall surface corresponding to the avoidance space.

13. A battery pack, characterized in that: A battery connection assembly comprising the battery connection assembly described in any one of claims 1 to 12, further comprising a battery box and a plurality of battery cell stacks, wherein a support beam is fixed in the battery box, the support beam divides the battery box into a plurality of accommodating cavities, the battery cell stacks are installed in the accommodating cavities, the support beam is provided with a through hole matching the conductive column, the conductive column passes through the support beam through the through hole, the avoidance space avoids the support beam, and the electrical connection parts at both ends of the conductive column are respectively electrically connected to the poles of the battery cells in the battery cell stack on both sides of the support beam.

14. The battery pack according to claim 13, characterized in that: The battery connection assembly includes a plug-in portion that is slidably plugged with a pole of the battery cell. The battery cell stack includes a plurality of battery cells. The battery cell is provided with a pole that is adapted to the plug-in portion, and the pole is plugged with the plug-in portion.

15. The battery pack according to claim 14, characterized in that: The plug-in portion is a frustum cavity with a side opening, wherein the large end face of the frustum cavity is open, and the opening of the large end face is connected to the side opening of the frustum cavity, and the pole is a frustum adapted to the plug-in portion.

16. The battery pack according to claim 13, characterized in that: The electrical connection portion includes a first connection portion and a second connection portion, one side of the first connection portion is connected to the second connection portion, the first connection portion is used to connect to the end surface of the conductive column, and the second connection portion is used to connect to the pole of the battery cell; There are multiple conductive posts, and the electrical connection part also includes a connecting block. One end of the multiple conductive posts is connected to one connecting block, and the other end is connected to another connecting block. The side of the connecting block away from the conductive post is connected to the first connecting part. The avoidance space is formed between the conductive post and the connecting blocks at both ends. Relative surfaces of the support beam are provided with accommodating grooves, and the two connecting blocks are respectively located in the two accommodating grooves.

17. A method for assembling a battery pack, used for assembling the battery pack according to any one of claims 13 to 16, characterized in that: The following steps are involved: S1: inserting the conductive column through the through hole on the support beam; S2: fixing the electrical connection parts at both ends of the conductive column respectively; S3: When the battery cell stack is placed on both sides of the support beam respectively, the poles of the battery cells in the battery cell stack are adapted to be connected with the electrical connection parts.

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