A battery pack

Abstract

The application relates to the field of energy storage devices and discloses a battery pack which comprises a busbar and an insulating frame; the busbar comprises a connecting plate part, one side of the connecting plate part is connected with a bending part, the bending part forms a plug-in groove for plugging with a pole; the insulating frame is provided with a positioning groove for supporting the connecting plate part and a containing groove for supporting the bending part, one end of the positioning groove penetrates into the containing groove; the shape of the connecting plate part is matched with the shape of the positioning groove, and the connecting plate part is positioned and installed in the positioning groove. The battery pack of the application optimizes the structure, can improve the installation convenience of the battery pack, and makes the assembly efficiency of the battery pack higher.

Description

Technical Field

[0001] This invention relates to the field of energy storage devices, and more particularly to a battery pack. Background Technology

[0002] A battery pack typically includes battery cells, busbars, and flexible circuit boards. The busbars connect the battery cells and the flexible circuit boards respectively, so that the flexible circuit boards can accurately detect the working status of the battery cells in the battery pack.

[0003] Currently, during battery pack installation, the busbar position needs to be manually adjusted to ensure it is in the correct location. One end of the busbar is then soldered to the cell terminal, and the other end is connected to the flexible circuit board. In existing battery packs, busbar installation is quite complex, requiring multiple adjustments and soldering steps, which hinders the improvement of battery pack assembly efficiency.

[0004] Therefore, it is necessary to design a battery pack that improves the ease of installation and assembly efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a battery pack that improves the ease of installation and enhances the assembly efficiency of the battery pack.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A battery pack, comprising:

[0008] The busbar includes a connecting plate portion, one side of which is connected to a bent portion, the bent portion forming a insertion groove for insertion with an electrode post;

[0009] An insulating frame is provided with a positioning groove for supporting the connecting plate and a receiving groove for supporting the bent portion, one end of the positioning groove extending through the receiving groove;

[0010] The shape of the connecting plate portion matches the shape of the positioning groove, and the connecting plate portion is positioned and installed in the positioning groove.

[0011] Optionally, the battery pack also includes a heat exchange plate;

[0012] The insulating frame is mounted on the heat exchange plate, and the insulating frame includes a first forming part having the positioning groove and a second forming part forming the receiving groove; the heat exchange plate is provided with a mounting groove and a first strip-shaped protrusion adjacent to the mounting groove;

[0013] The first molding part insulatingly separates the connecting plate part and the first strip-shaped protrusion, and the second molding part insulatingly separates the mounting groove and the bending part.

[0014] Optionally, the heat exchange plate further includes a support layer;

[0015] The first strip-shaped protrusion is disposed on the support layer, the support layer is located on the side of the first strip-shaped protrusion away from the insulating frame, and a sealed heat-insulating cavity is provided in the support layer.

[0016] Optionally, the first forming part fits into the first strip-shaped protrusion, and the second forming part fits into the bottom of the mounting groove.

[0017] Optionally, a first heat exchange medium flow channel is provided in the first strip-shaped protrusion, and the extension direction of the first heat exchange medium flow channel is parallel to the extension direction of the mounting groove.

[0018] Optionally, the bottom of the positioning groove is hollowed out, and an insulating heat-conducting pad is provided between the connecting plate portion and the first strip-shaped protrusion portion. The two opposite sides of the insulating heat-conducting pad are respectively attached to the first strip-shaped protrusion portion and the connecting plate portion.

[0019] Optionally, the first molding part is flat, and the top surface of the first strip-shaped protrusion facing the first molding part is a plane.

[0020] Optionally, the first molding portion is arc-shaped, and the top surface of the first strip-shaped protrusion facing the first molding portion is an arc surface that matches the first molding portion.

[0021] Optionally, the heat exchange plate is further provided with a plurality of second strip-shaped protrusions, and two adjacent second strip-shaped protrusions are used to support the battery cells;

[0022] Two adjacent second strip-shaped protrusions are arranged parallel to each other at intervals, and the first forming part and the second forming part are arranged between two adjacent second strip-shaped protrusions.

[0023] Optionally, an insulating pad is provided on the second strip-shaped protrusion.

[0024] Optionally, the second molded portion has a U-shaped cross-section perpendicular to the extending direction of the receiving groove.

[0025] Optionally, the curved portion is connected to both opposite sides of the connecting plate portion;

[0026] The insulating frame is provided with at least two of the receiving grooves at intervals, and the two adjacent curved portions of the busbar are respectively located in the two adjacent receiving grooves.

[0027] Optionally, the two opposite outer surfaces of the curved portion abut against the opposite two side walls of the corresponding receiving groove.

[0028] Optionally, the curved portion has a bottom surface facing the bottom of the mounting groove, the bottom surface conforming to the bottom of the receiving groove; the bottom of the second forming portion conforms to the mounting groove.

[0029] Optionally, the insulating frame further includes a third molding portion for supporting the flexible circuit board;

[0030] The first molding part is connected to both opposite sides of the third molding part, and the second molding part is connected to the side of the first molding part away from the third molding part.

[0031] Optionally, the battery pack also includes a flexible circuit board disposed on the third molding section, wherein a plurality of connecting pieces are arranged on opposite sides of the flexible circuit board, and each connecting piece is connected to one of the busbars.

[0032] Optionally, the insulating frame is provided with clearance through holes, and the connecting piece passes through the clearance through holes and is connected to the busbar.

[0033] Optionally, the heat exchange plate is provided with a support platform for supporting the third forming part, and the support platform is provided with heat exchange through holes; the two opposite sides of the third forming part respectively abut against the support platform and the flexible circuit board;

[0034] The heat exchange through hole is parallel to the receiving groove.

[0035] Optionally, the insulating frame is integrally formed.

[0036] Optionally, the insulating frame is a thermally conductive frame.

[0037] Optionally, the busbar is integrally stamped.

[0038] Optionally, the insertion groove is a trench;

[0039] The curved portion is provided with N partition gaps spaced at intervals along the extension direction of the insertion groove.

[0040] All N of the aforementioned separation gaps penetrate one side of the groove wall of the insertion groove, so that one side of the groove wall of the curved portion forms N+1 abutment portions arranged at intervals along the extension direction of the insertion groove.

[0041] Optionally, the curved portion has a first bending forming portion and a second bending forming portion, and the first bending forming portion is connected to the second bending forming portion to form the groove;

[0042] The first bending forming part is connected to the connecting plate part at one end away from the second bending forming part, and connected to the second bending forming part at the other end; the second bending forming part is provided with the N+1 abutment parts at the end away from the first bending forming part.

[0043] The second bending forming part forms a comb-like structure, and the N+1 abutting parts constitute the comb teeth of the comb-like structure.

[0044] Optionally, both the positioning groove and the receiving groove are grooves; the depth of the receiving groove is greater than the depth of the positioning groove.

[0045] Optionally, the depth of the positioning groove is consistent with the thickness of the connecting plate portion.

[0046] Optionally, the extending direction of the positioning groove is perpendicular to the extending direction of the receiving groove.

[0047] Optionally, the busbar is glued to the insulating frame; or, the busbar is snap-fitted to the insulating frame.

[0048] Optionally, the battery pack may also include battery cells;

[0049] The battery cell is inverted, with the insulating frame disposed on one side of the bottom of the battery cell, and the terminal of the battery cell inserted downward into the insertion groove; or, the battery cell is upright, with the insulating frame disposed on one side of the top of the battery cell, and the terminal of the battery cell inserted upward into the insertion groove.

[0050] Optionally, the pole includes a fixing platform, the fixing platform having a platform facing the connecting plate, and the platform having a strip-shaped insertion portion for inserting into the insertion groove.

[0051] Optionally, the strip-shaped connector has a rectangular cross-section perpendicular to its extension direction.

[0052] Optionally, a conductive paint layer is provided on the connecting plate portion, and the table surface is attached to the conductive paint layer.

[0053] Optionally, the busbar is provided with at least one position calibration through hole, and the center line of the position calibration through hole is perpendicular to the surface of the connecting plate.

[0054] When the busbar is installed in the positioning groove, the center line of the position calibration through hole and one side wall of the positioning groove have a preset distance; the preset distance is greater than the diameter of the position calibration through hole.

[0055] Optionally, the busbar has a position calibration through hole on one side of the groove wall adjacent to the positioning groove, and another position calibration through hole on the other side of the groove wall adjacent to the positioning groove; the distance between the two position calibration through holes is less than the groove width of the positioning groove along the extension direction of the insertion groove.

[0056] Optionally, the heat exchange plate is connected to several side plates on its sides;

[0057] A plurality of said cells are arranged along the extending direction of said receiving groove to form a cell group;

[0058] The heat exchange plate and several of the side plates enclose an open box for accommodating the battery cell assembly;

[0059] The interior of at least one side plate has a heat exchange medium flow channel.

[0060] Optionally, the battery pack also includes a cover for sealing the open housing, the cover having an interior forming a third heat exchange medium flow channel.

[0061] Compared with the prior art, the present invention has the following beneficial effects:

[0062] In this embodiment, by cleverly designing the structure of the busbar and insulating frame, the connecting plate can be directly placed in the positioning groove of the insulating frame, thereby completing the installation and positioning of the busbar. The busbar is provided with a curved portion forming a insertion groove, and the receiving groove on the insulating frame supports the curved portion, allowing the battery cell's terminal post to be directly inserted into the insertion groove to complete the connection with the busbar without the need for welding. The structure in this technical solution effectively reduces welding time and busbar positioning time, making battery pack assembly simpler and more convenient, and effectively improving battery pack assembly efficiency. Attached Figure Description

[0063] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0064] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0065] Figure 1 This is a schematic diagram of the battery pack installation structure under the hidden top cover according to an embodiment of the present invention.

[0066] Figure 2 This is a top view of the battery pack provided in an embodiment of the present invention with the top cover hidden.

[0067] Figure 3 for Figure 2 A schematic diagram of the AA cross-sectional structure of the battery pack;

[0068] Figure 4 for Figure 3 An enlarged view of position A in the middle;

[0069] Figure 5 for Figure 4 An enlarged view of position D in the middle;

[0070] Figure 6 for Figure 3 An enlarged view of position B in the middle;

[0071] Figure 7 for Figure 3 An enlarged view of position C in the middle;

[0072] Figure 8 A schematic diagram of the mounting structure of the busbar, insulating frame, and flexible circuit board provided in an embodiment of the present invention;

[0073] Figure 9 for Figure 8 An enlarged view of position E in the middle;

[0074] Figure 10 for Figure 9 Enlarged diagram of position F in the middle;

[0075] Figure 11 A three-dimensional structural schematic diagram of the insulating frame provided in an embodiment of the present invention;

[0076] Figure 12 This is a schematic diagram of the bus structure provided in an embodiment of the present invention.

[0077] Illustrations: 1. Busbar; 101. Position marking through hole; 11. Connecting plate; 111. Conductive coating; 12. Bending section; 121. Separation gap; 1201. First bending forming section; 1202. Second bending forming section; 13. Insertion groove; 2. Insulating frame; 201. First forming section; 202. Second forming section; 203. Third forming section; 21. Positioning groove; 22. Receiving groove; 23. Clearance through hole; 3. 301. Heat exchange plate; 302. Support layer; 303. Insulation cavity; 31. Mounting groove; 32. First strip-shaped protrusion; 321. First heat exchange medium flow channel; 33. Second strip-shaped protrusion; 34. Support platform; 341. Heat exchange channel; 4. Insulating thermal conductive pad; 5. Flexible circuit board; 51. Connecting piece; 6. Battery cell; 61. Electrode post; 611. Fixing platform; 612. Strip-shaped plug-in part; 7. Side plate; 71. Heat exchange medium flow channel. Detailed Implementation

[0078] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0079] In the description of this invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component positioned centrally in the connection.

[0080] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0081] This invention provides a battery pack that is easier and faster to install, thereby improving the assembly efficiency of the battery pack.

[0082] Please see Figures 1 to 12 The battery includes a busbar 1 and an insulating frame 2.

[0083] The busbar 1 includes a connecting plate portion 11, and a bent portion 12 is connected to one side of the connecting plate portion 11. The bent portion 12 forms an insertion groove 13 for insertion into the pole post 61. The insulating frame 2 is provided with a positioning groove 21 for supporting the connecting plate portion 11 and a receiving groove 22 for supporting the bent portion 12. One end of the positioning groove 21 extends through the receiving groove 22. The shape of the connecting plate portion 11 matches the shape of the positioning groove 21, and the connecting plate portion 11 is positioned and installed in the positioning groove 21.

[0084] During the installation of the battery pack busbar 1, battery cell 6, and insulating frame 2, the connecting plate 11 of the busbar 1 can be directly placed in the positioning groove 21, and the bent part 12 can be placed in the receiving groove 22, thus positioning the busbar 1 on the insulating frame 2. This eliminates the need for subsequent manual adjustment of the busbar 1's position, effectively ensuring that the busbar 1 will not be misaligned. Then, the terminal 61 of the battery cell 6 can be directly inserted into the insertion groove 13, connecting the busbar 1 and the terminal 61. In this installation process, there is no need to weld the terminal 61 to the busbar 1, nor is there any need to adjust the position of the busbar 1, effectively reducing welding time and positioning time. The installation of the battery cell 6 is simpler and more convenient, effectively improving the assembly efficiency of the battery pack.

[0085] When the connecting plate 11 is positioned and installed in the positioning groove 21, the bent part 12 is supported by the receiving groove 22, which improves the stability of the bent part 12 and the pole 61 during the insertion process and avoids the bent part 12 from being tilted, which would prevent the pole 61 from being inserted into the insertion groove 13.

[0086] Preferably, the busbar 1 is elastic and can clamp the terminal 61 when it is inserted to ensure the connection is effective.

[0087] In one specific embodiment, the battery pack also includes a heat exchange plate 3; the heat exchange plate 3 can be used to cool the terminal post 61 and the busbar 1, or to heat and cool the terminal post 61 and the busbar 1 in a cold environment, thereby avoiding the terminal post 61 and the busbar 1 from being too hot or too cold.

[0088] The insulating frame 2 is mounted on the heat exchange plate 3. The insulating frame 2 includes a first forming part 201 with a positioning groove 21 and a second forming part 202 with a receiving groove 22. The heat exchange plate 3 is provided with a mounting groove 31 and a first strip-shaped protrusion 32 adjacent to the mounting groove 31.

[0089] The heat exchange plate 3 can be a metal component with good thermal conductivity and high strength. For example, the material of the heat exchange plate 3 can be aluminum alloy, copper alloy, or other metal alloys. The heat exchange plate 3 can also be a non-metallic component with good thermal conductivity and high strength. The first forming part 201 insulates and separates the connecting plate part 11 and the first strip-shaped protrusion 32. The presence of the first forming part 201 prevents the connecting plate part 11 from electrically connecting to the heat exchange plate 3, that is, the electrode post 61 cannot be electrically connected to the heat exchange plate 3, reducing the possibility of leakage. The second forming part 202 insulates and separates the mounting groove 31 and the bent part 12. The presence of the second forming part 202 prevents the bent part 12 from conducting electricity through the heat exchange plate 3, avoiding leakage and improving the safety performance of the battery pack.

[0090] Optionally, in order to maximize the integration of the battery pack and reduce the overall height of the battery pack, the first molding part 201 fits into the first strip-shaped protrusion 32, and the second molding part 202 fits into the bottom of the mounting groove 31.

[0091] Optionally, a first heat exchange medium flow channel 321 is provided within the first strip-shaped protrusion 32, and the extension direction of the first heat exchange medium flow channel 321 is parallel to the extension direction of the mounting groove 31. On the one hand, the provision of the first heat exchange medium flow channel 321 can effectively improve the heat exchange efficiency, and the provision of the first strip-shaped protrusion 32 can effectively increase the heat absorption area, which can better conduct heat off the electrode 61 and the busbar 1 or heat up the electrode 61 and the busbar 1 in a timely manner; on the other hand, the mounting groove 31 can accommodate multiple bends 12 along its extension direction, and the extension direction of the first heat exchange medium flow channel 321 is parallel to the extension direction of the mounting groove 31, which can prevent the temperature difference of the multiple bends 12 from being too large, thus helping to improve the temperature uniformity of the battery pack.

[0092] Optionally, the heat exchange plate 3 further includes a support layer 301; a first strip-shaped protrusion 32 is disposed on the support layer 301, the support layer 301 is located on the side of the first strip-shaped protrusion 32 away from the insulating frame 2, and a sealed heat-insulating cavity 302 is provided in the support layer 301. Figure 5 As shown, on the one hand, the first strip-shaped protrusion 32 is disposed on the support layer 301, and the support layer 301 can play a role in improving the structural strength of the heat exchange plate 3; on the other hand, the support layer 301 is provided with a heat insulation cavity 302, which can effectively prevent the first strip-shaped protrusion 32 from being affected by the external temperature and can effectively maintain the temperature of the heat exchange medium in the first heat exchange medium flow channel 321.

[0093] Optionally, to improve the heat dissipation effect on the connecting plate portion 11, the bottom of the positioning groove 21 is hollowed out, and an insulating thermally conductive pad 4 is provided between the connecting plate portion 11 and the first strip-shaped protrusion 32. The two opposite sides of the insulating thermally conductive pad 4 are respectively attached to the first strip-shaped protrusion 32 and the connecting plate portion 11. The insulating thermally conductive pad 4 can effectively transfer heat from the connecting plate portion 11 to the first strip-shaped protrusion 32, and then the heat is carried away by the heat exchange medium in the first heat exchange medium flow channel 321. It should be noted that the heat exchange medium can be a liquid medium or a gaseous medium. For example, the liquid medium can be water, and the gaseous medium can be cold air.

[0094] Optionally, to increase the contact area between the first molding portion 201 and the first strip-shaped protrusion 32, thereby further improving the heat absorption effect of the first strip-shaped protrusion 32, the first molding portion 201 is flat, and the top surface of the first strip-shaped protrusion 32 facing the first molding portion 201 is flat. In another specific embodiment, the first molding portion 201 is arc-shaped, and the top surface of the first strip-shaped protrusion 32 facing the first molding portion 201 is an arc surface matching the first molding portion 201.

[0095] Optionally, the heat exchange plate 3 is further provided with a plurality of second strip-shaped protrusions 33, and two adjacent second strip-shaped protrusions 33 are used to support the battery cell 6. The presence of the second strip-shaped protrusions 33 makes the insertion depth of the electrode post 61 into the insertion groove 13 more suitable, and makes the insertion effect of the electrode post 61 and the insertion groove 13 better, which helps to avoid the occurrence of poor insertion. Two adjacent second strip-shaped protrusions 33 are arranged parallel to each other at intervals, and a first forming part 201 and a second forming part 202 are provided between two adjacent second strip-shaped protrusions 33. In a specific embodiment, the top cover of the battery cell 6 abuts against the top surface of the second strip-shaped protrusion 33, so that the insertion depth of the electrode post 61 is not too deep or too shallow. At this time, the two ends of the top cover of the battery cell 6 abut against one second strip-shaped protrusion 33 respectively.

[0096] Optionally, to prevent the second strip-shaped protrusion 33 from communicating with the top cover, an insulating pad 331 is provided on the second strip-shaped protrusion 33. Of course, this solution is not limited to one type of insulation; other insulation methods can also be used, such as providing insulating varnish on the top cover.

[0097] Optionally, the second forming portion 202 has a U-shaped cross-section perpendicular to the extending direction of the receiving groove 22. The U-shape surrounds the side of the bent portion 12 away from the battery cell, thereby preventing the bent portion 12 from contacting the mounting groove 31.

[0098] Optionally, the connecting plate portion 11 has bends 12 connected to its opposite two sides; the insulating frame 2 has at least two receiving grooves 22 spaced apart, and the two adjacent bends 12 of the busbar 1 are respectively located in the two adjacent receiving grooves 22. The two bends 12 are respectively located in the two adjacent receiving grooves 22, so that the connecting plate portion 11 is installed in the two adjacent receiving grooves 22. The two bends 12 effectively define the installation position of the connecting plate portion 11, and the two ends of the connecting plate portion 11 are respectively connected to the bends 12, which improves the installation stability.

[0099] In addition, the busbar 1 is provided with at least two bends 12, and the bends 12 are all installed in the receiving grooves 22, which makes the positioning of the busbar 1 on the insulating frame 2 more effective.

[0100] Optionally, the two opposite outer surfaces of the bent portion 12 abut against the opposite side walls of the corresponding receiving groove 22, which helps to improve the installation stability of the busbar 1. Preferably, the bent portion 12 has a bottom surface facing the bottom of the mounting groove 31, and the bottom surface fits the bottom of the receiving groove 22; the bottom of the second forming portion 202 fits the mounting groove 31. At this time, the heat on the busbar 1 can be transferred to the second forming portion 202 through the bent portion 12, and then the heat is transferred from the second forming portion 202 to the heat exchange plate 3, thereby improving the cooling effect.

[0101] Optionally, the insulating frame 2 further includes a third molding portion 203 for supporting the flexible circuit board 5; the third molding portion 203 provides insulation separation between the flexible circuit board 5 and the heat exchange plate 3. First molding portions 201 are connected to opposite sides of the third molding portion 203, and a second molding portion 202 is connected to the side of the first molding portion 201 away from the third molding portion 203. In this case, the third molding portion 203 is located between the positive and negative terminals of the battery cell, and the positive terminal is plugged into a busbar 1 on one side of the insulating frame 2, while the negative terminal is plugged into a busbar 1 on the other side of the insulating frame 2.

[0102] Optionally, the battery pack also includes a flexible circuit board 5 disposed on the third forming section 203. Several connecting pieces 51 are arranged on opposite sides of the flexible circuit board 5, each connecting piece 51 connecting to a busbar 1. The connecting pieces 51 allow each busbar 1 to be connected to the flexible circuit board 5. It should be noted that the connecting pieces 51 do not need to be directly connected to the terminal posts 61. Therefore, during the replacement of the battery cell 6, it is not necessary to disassemble the connecting pieces 51 again. That is, replacing the battery cell 6 in this embodiment is more convenient, and the battery pack is easier to maintain.

[0103] Optionally, the insulating frame 2 is provided with clearance through holes 23, through which the connecting piece 51 passes and connects to the busbar 1. Here, the connecting piece 51 and the busbar 1 can be connected by welding, threading, or other means that enable conductive connection. The clearance through holes 23 allow the connecting piece 51 to connect to the busbar 1 more directly.

[0104] Optionally, the heat exchange plate 3 is provided with a support platform 34 for supporting the third forming part 203, and the support platform 34 is provided with a heat exchange through hole 341 inside; the two opposite sides of the third forming part 203 respectively abut against the support platform 34 and the flexible circuit board 5; the heat exchange through hole 341 is parallel to the receiving groove 22.

[0105] The heat on the flexible circuit board 5 can be transferred to the support platform 34 through the third molding part 203, thereby preventing the flexible circuit board 5 from getting too hot.

[0106] Optionally, to increase the strength and dimensional consistency of the insulation frame 2, the insulation frame 2 is integrally molded.

[0107] Optionally, the insulating frame 2 can be configured as a heat-conducting frame to improve its heat transfer capacity, so that the heat generated by the connection between the electrode post 61 and the busbar 1 can be transferred to the heat exchange plate 3 more quickly. Alternatively, at lower temperatures, the heat on the heat exchange plate 3 can be transferred to the battery cell 6 more quickly.

[0108] Optionally, the busbar 1 is integrally stamped, and each busbar 1 has the same size and specifications.

[0109] Optionally, the insertion groove 13 is a trench; the bent portion 12 is provided with N partition gaps 121 spaced apart along the extension direction of the insertion groove 13; each of the N partition gaps 121 penetrates one side of the groove wall of the insertion groove 13, so that one side of the groove wall of the bent portion 12 forms N+1 abutment portions spaced apart along the extension direction of the insertion groove 13. In this embodiment, by dividing one side of the groove wall of the bent portion 12 into N+1 abutment portions spaced apart, it is beneficial to make as many abutment portions as possible abut against the pole post 61, thereby improving the conductivity between the pole post 61 and the bent portion 12. It should be noted that when one side of the groove wall of the bent portion 12 is an integral structure, the one side of the groove wall of the bent portion 12 may have a small area that only contacts the pole post 61. The bent portion 12 has poor deformation ability, which reduces the contact area between the pole post 61 and the bent portion 12, resulting in poor conductivity between the pole post 61 and the bent portion 12.

[0110] Optionally, such as Figure 12 The curved portion 12 has a first bending forming portion 1201 and a second bending forming portion 1202, and the first bending forming portion 1201 is connected to the second bending forming portion 1202 to form a groove. For example... Figure 10The first bending forming part 1201 is connected to the connecting plate part 11 at one end away from the second bending forming part 1202, and to the second bending forming part 1202 at the other end. The second bending forming part 1202 has N+1 abutment portions at its end away from the first bending forming part 1201. The second bending forming part 1202 forms a comb-like structure, and the N+1 abutment portions constitute the teeth of the comb-like structure. A separation gap 121 exists between adjacent comb teeth. The electrode post 61 is inserted between the comb teeth and the first bending forming part 1201, thereby achieving an insertion connection between the electrode post 61 and the bending part 12. The comb teeth have better elastic bending performance, so when the electrode post 61 is inserted into the groove, multiple comb teeth can have good conductive connection with the electrode post 61, which helps to reduce the connection resistance between the electrode post 61 and the bending part 12, and can effectively reduce the heat generation at the connection point between the electrode post 61 and the bending part 12.

[0111] Preferably, the first bending forming portion 1201 has N+1 abutment portions, and the second bending forming portion 1202 has N+1 comb teeth, thereby achieving better contact between the pole post 61 and the bending portion 12.

[0112] Optionally, both the positioning groove 21 and the receiving groove 22 are grooves; the groove depth of the receiving groove 22 is greater than the groove depth of the positioning groove 21, so that the bent portion 12 can penetrate deeper into the insulating frame 2, thereby helping to reduce the overall height of the battery pack in the vertical direction.

[0113] Optionally, the depth of the positioning groove 21 is the same as the thickness of the connecting plate portion 11. When the connecting plate portion 11 is mounted on the insulating frame 2, the top surface of the connecting plate portion 11 is flush with the top surface of the insulating frame 2.

[0114] Optionally, the extending direction of the positioning groove 21 is perpendicular to the extending direction of the receiving groove 22. When the pole post 61 is inserted obliquely into the receiving groove 22, the busbar 1 will not move due to the obstruction of the side wall of the positioning groove 21.

[0115] Optionally, the busbar 1 is fixedly connected to the insulating frame 2, for example, the busbar 1 is glued to the insulating frame 2; or, the busbar 1 is snapped to the insulating frame 2; or, the busbar 1 is indirectly fixed to the insulating frame 2 through other connectors.

[0116] Optionally, the battery pack also includes a battery cell 6; the battery cell 6 can be connected to the busbar 1 in different orientations. For example, the battery cell 6 is inverted, the insulating frame 2 is located on the bottom side of the battery cell 6, and the terminal 61 of the battery cell 6 is inserted downward into the insertion groove 13; or, the battery cell 6 is upright, the insulating frame 2 is located on the top side of the battery cell 6, and the terminal 61 of the battery cell 6 is inserted upward into the insertion groove 13.

[0117] When the battery cell 6 is inverted, the weight of the battery cell 6 itself keeps the terminal post 61 inserted into the insertion groove 13, which can ensure the insertion connection effect well. When the battery cell 6 is upright, a certain pressure needs to be applied to the busbar 1 by the clamping member to maintain the good insertion effect of the busbar 1 and the terminal post 61.

[0118] Optionally, the terminal 61 includes a fixing platform 611 with a surface facing the connecting plate 11. A strip-shaped insertion portion 612 for inserting into the insertion groove 13 is provided on the platform. The strip-shaped insertion portion 612 is inserted into the insertion groove 13 to connect the busbar 1 and the terminal 61. A conductive paint layer 111 is provided on the connecting plate 11, and the platform adheres to the conductive paint layer 111 to further increase the contact area between the terminal 61 and the busbar 1, reduce resistance, and thus improve conductivity. This also helps to reduce heat generation between the terminal 61 and the busbar 1.

[0119] Optionally, the strip-shaped plug portion 612 has a rectangular cross-section perpendicular to its extension direction, so that both opposite sides of the strip-shaped plug portion 612 can contact the opposite side walls of the plug groove 13.

[0120] Optionally, the busbar 1 is provided with at least one position calibration through hole 101, and the center line of the position calibration through hole 101 is perpendicular to the plate surface of the connecting plate portion 11; when the busbar 1 is installed in the positioning groove 21, the center line of the position calibration through hole 101 and one side of the groove wall of the positioning groove 21 have a preset distance; the preset distance is greater than the hole diameter of the position calibration through hole 101.

[0121] It should be noted that if the insulating frame 2 is observed through the position calibration through-hole 101 in a direction perpendicular to the surface of the connecting plate 11, it indicates that the installation position of the busbar 1 is deviated, and the busbar 1 is not accurately installed in the positioning groove 21. Provided the positioning groove 21 is installed correctly, the projection of the position calibration through-hole 101 in a direction perpendicular to the surface of the connecting plate 11 will always be located in the hollow area. Workers or inspection cameras can determine whether the installation of the busbar 1 is accurate by observing the position calibration through-hole 101.

[0122] Optionally, a position calibration through hole 101 is provided on one side of the manifold 1 adjacent to the positioning groove 21, and another position calibration through hole 101 is provided on the other side of the manifold 1 adjacent to the positioning groove 21; the distance between the two position calibration through holes 101 along the extension direction of the insertion groove 13 is less than the groove width of the positioning groove 21. The position calibration through holes 101 provided on both sides can effectively detect whether the direction of the manifold 1 is reversed, and has a good foolproof function.

[0123] Optionally, the heat exchange plate 3 is connected to several side plates 7; several battery cells 6 are arranged along the extending direction of the receiving groove 22 to form a battery cell assembly; the heat exchange plate 3 and the several side plates 7 enclose an open box for accommodating the battery cell assembly; at least one side plate 7 has a heat exchange medium flow channel 71 formed inside. Specifically, the number of side plates 7 is greater than two, and can be four, six, or other numbers, as long as all the side plates 7 can enclose an open box. In a specific embodiment, at least one of the side plates 7 is provided with a heat exchange medium flow channel 71, so that multiple sides of the battery cell assembly in the battery pack can obtain a better heat exchange effect, which can effectively improve the heat dissipation effect or achieve the purpose of rapid heating.

[0124] Optionally, the battery pack also includes a cover for sealing the opening of the housing, with a third heat exchange medium flow channel formed inside the cover, in which case the cover can also play a role in heat dissipation or heating.

[0125] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0126] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

[0127] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery pack, characterized in that, include: Busbar (1) includes a connecting plate portion (11), one side of which is connected to a bent portion (12), the bent portion (12) forming a insertion groove (13) for insertion with a pole post (61); The insulating frame (2) is provided with a positioning groove (21) for supporting the connecting plate portion (11) and a receiving groove (22) for supporting the bent portion (12), one end of the positioning groove (21) extending through the receiving groove (22); The shape of the connecting plate portion (11) matches the shape of the positioning groove (21), and the connecting plate portion (11) is positioned and installed in the positioning groove (21).

2. The battery pack according to claim 1, characterized in that, It also includes a heat exchange plate (3); The insulating frame (2) is mounted on the heat exchange plate (3). The insulating frame (2) includes a first forming part (201) with the positioning groove (21) and a second forming part (202) forming the receiving groove (22). The heat exchange plate (3) is provided with a mounting groove (31) and a first strip-shaped protrusion (32) adjacent to the mounting groove (31). The first molding part (201) insulatingly separates the connecting plate part (11) and the first strip-shaped protrusion (32), and the second molding part (202) insulatingly separates the mounting groove (31) and the bending part (12).

3. The battery pack according to claim 2, characterized in that, The first forming part (201) fits into the first strip-shaped protrusion (32), and the second forming part (202) fits into the bottom of the mounting groove (31).

4. The battery pack according to claim 2, characterized in that, The first strip-shaped protrusion (32) is provided with a first heat exchange medium flow channel (321), and the extension direction of the first heat exchange medium flow channel (321) is parallel to the extension direction of the mounting groove (31).

5. The battery pack according to claim 4, characterized in that, The heat exchange plate (3) also includes a support layer (301); The first strip-shaped protrusion (32) is disposed on the support layer (301), the support layer (301) is located on the side of the first strip-shaped protrusion (32) away from the insulating frame (2), and a sealed heat-insulating cavity (302) is provided in the support layer (301).

6. The battery pack according to claim 2, characterized in that, The bottom of the positioning groove (21) is hollowed out, and an insulating heat-conducting pad (4) is provided between the connecting plate part (11) and the first strip protrusion part (32). The two opposite sides of the insulating heat-conducting pad (4) are respectively attached to the first strip protrusion part (32) and the connecting plate part (11).

7. The battery pack according to claim 2, characterized in that, The first molding part (201) is flat, and the top surface of the first strip protrusion (32) facing the first molding part (201) is flat.

8. The battery pack according to claim 2, characterized in that, The first molding part (201) is arc-shaped, and the top surface of the first strip protrusion (32) facing the first molding part (201) is an arc surface that matches the first molding part (201).

9. The battery pack according to claim 2, characterized in that, The heat exchange plate (3) is also provided with a plurality of second strip-shaped protrusions (33), and two adjacent second strip-shaped protrusions (33) are used to support the battery cell (6); Two adjacent second strip-shaped protrusions (33) are arranged in parallel with a distance between them, and the first forming part (201) and the second forming part (202) are arranged between two adjacent second strip-shaped protrusions (33).

10. The battery pack according to claim 9, characterized in that, An insulating pad (331) is provided on the second strip-shaped protrusion (33).

11. The battery pack according to claim 2, characterized in that, The second forming part (202) has a U-shaped cross section in the direction perpendicular to the extension of the receiving groove (22).

12. The battery pack according to claim 2, characterized in that, The curved portion (12) is connected to both opposite sides of the connecting plate portion (11); The insulating frame (2) is provided with at least two of the receiving grooves (22) at intervals, and the two adjacent bends (12) of the busbar (1) are respectively located in the two adjacent receiving grooves (22).

13. The battery pack according to claim 11, characterized in that, The two opposite outer surfaces of the curved portion (12) respectively abut against the opposite two side walls of the corresponding receiving groove (22).

14. The battery pack according to claim 13, characterized in that, The curved portion (12) has a bottom surface facing the bottom of the mounting groove (31), the bottom surface being in contact with the bottom of the receiving groove (22); the bottom of the second forming portion (202) is in contact with the mounting groove (31).

15. The battery pack according to claim 2, characterized in that, The insulating frame (2) also includes a third forming part (203) for supporting the flexible circuit board (5); The first molding part (201) is connected to both opposite sides of the third molding part (203), and the second molding part (202) is connected to the side of the first molding part (201) away from the third molding part (203).

16. The battery pack according to claim 15, characterized in that, It also includes a flexible circuit board (5) disposed on the third forming part (203), and a plurality of connecting pieces (51) are arranged on both sides of the flexible circuit board (5), and each connecting piece (51) is connected to a busbar (1).

17. The battery pack according to claim 16, characterized in that, The insulating frame (2) is provided with clearance through holes (23), and the connecting piece (51) passes through the clearance through holes (23) and is connected to the busbar (1).

18. The battery pack according to claim 15, characterized in that, The heat exchange plate (3) is provided with a support platform (34) for supporting the third forming part (203), and the support platform (34) is provided with heat exchange through holes (341); the two opposite sides of the third forming part (203) respectively abut against the support platform (34) and the flexible circuit board (5); The heat exchange through hole (341) is parallel to the receiving groove (22).

19. The battery pack according to claim 14, characterized in that, The insulating frame (2) is integrally formed.

20. The battery pack according to claim 1, characterized in that, The insulating frame (2) is a thermally conductive frame.

21. The battery pack according to claim 1, characterized in that, The busbar (1) is integrally stamped.

22. The battery pack according to claim 1, characterized in that, The insertion groove (13) is a groove; The curved portion (12) is provided with N partition gaps (121) spaced apart along the extension direction of the insertion groove (13); The N separation gaps (121) all penetrate one side of the insertion groove (13) so that one side of the curved portion (12) has N+1 abutment portions arranged at intervals along the extension direction of the insertion groove (13).

23. The battery pack according to claim 22, characterized in that, The curved portion (12) has a first bending forming portion (1201) and a second bending forming portion (1202), and the first bending forming portion (1201) is connected to the second bending forming portion (1202) to form the groove. The first bending forming part (1201) is connected to the connecting plate part (11) at one end away from the second bending forming part (1202), and connected to the second bending forming part (1202) at the other end; the second bending forming part (1202) is provided with the N+1 abutment parts at the end away from the first bending forming part (1201); The second bending forming part (1202) forms a comb-like structure, and the N+1 abutting parts constitute the comb teeth of the comb-like structure.

24. The battery pack according to claim 22, characterized in that, Both the positioning groove (21) and the receiving groove (22) are grooves; the depth of the receiving groove (22) is greater than the depth of the positioning groove (21).

25. The battery pack according to claim 24, characterized in that, The depth of the positioning groove (21) is consistent with the thickness of the connecting plate portion (11).

26. The battery pack according to claim 1, characterized in that, The extension direction of the positioning groove (21) is perpendicular to the extension direction of the receiving groove (22).

27. The battery pack according to claim 1, characterized in that, The busbar (1) is glued to the insulating frame (2); or the busbar (1) is snapped to the insulating frame (2).

28. The battery pack according to claim 1, characterized in that, It also includes battery cells (6); The battery cell (6) is inverted, the insulating frame (2) is disposed on the bottom side of the battery cell (6), and the terminal post (61) of the battery cell (6) is inserted downward into the insertion groove (13); or, the battery cell (6) is upright, the insulating frame (2) is disposed on the top side of the battery cell (6), and the terminal post (61) of the battery cell (6) is inserted upward into the insertion groove (13).

29. The battery pack according to claim 28, characterized in that, The pole post (61) includes a fixed platform (611) having a platform facing the connecting plate (11) and a strip-shaped insertion part (612) for inserting into the insertion groove (13) provided on the platform.

30. The battery pack according to claim 29, characterized in that, The strip-shaped connector (612) has a rectangular cross-section perpendicular to the extending direction of the strip-shaped connector (612).

31. The battery pack according to claim 29, characterized in that, A conductive paint layer (111) is provided on the connecting plate (11), and the table surface is attached to the conductive paint layer (111).

32. The battery pack according to claim 6, characterized in that, The busbar (1) is provided with at least one position calibration through hole (101), and the center line of the position calibration through hole (101) is perpendicular to the plate surface of the connecting plate portion (11); When the busbar (1) is installed in the positioning groove (21), the center line of the position calibration through hole (101) and the groove wall on one side of the positioning groove (21) have a preset distance; the preset distance is greater than the diameter of the position calibration through hole (101).

33. The battery pack according to claim 32, characterized in that, The busbar (1) has a position calibration through hole (101) on one side of the groove wall adjacent to the positioning groove (21), and another position calibration through hole (101) on the other side of the groove wall adjacent to the positioning groove (21); along the extension direction of the insertion groove (13), the distance between the two position calibration through holes (101) is less than the groove width of the positioning groove (21).

34. The battery pack according to claim 2, characterized in that, The heat exchange plate (3) has several side plates (7) connected to its side; A plurality of battery cells (6) are arranged along the extending direction of the receiving groove (22) to form a battery cell (6) group; The heat exchange plate (3) and several of the side plates (7) enclose an open box for accommodating the battery cell (6) assembly; The interior of at least one side plate (7) has a heat exchange medium flow channel (71).

35. The battery pack according to claim 34, characterized in that, It also includes a box cover for sealing the open box body, the inside of which forms a third heat exchange medium flow channel.

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