Battery assembly and battery pack

Abstract

The invention relates to the technical field of electric energy storage, and particularly discloses a battery assembly and a battery pack. The battery module comprises a plurality of single battery cells, a plurality of chips, a positive output electrode and a negative output electrode, wherein the chips are electrically connected with two adjacent single battery cells to enable the single battery cells to form a power supply whole, the positive output electrode is electrically connected to the positive electrode of the power supply whole, and the negative output electrode is electrically connected to the negative electrode of the power supply whole; wherein each output pole is correspondingly provided with an output pole supporting seat; the output pole supporting seats of two adjacent battery modules are electrically connected through the bridging conducting bars; wherein the output pole and the bridging conducting bar are detachably and electrically connected through the output pole supporting seat. The battery assembly and the battery pack provided by the invention can effectively solve the problem of relatively high maintenance cost caused by the fact that the output electrode cannot be disassembled.

Description

Technical Field

[0001] The present invention relates to the technical field of electric energy storage, and in particular to a battery assembly and a battery pack. Background Art

[0002] Existing battery packs typically include:

[0003] Several battery modules, each comprising several battery cells, several tabs electrically connecting two adjacent battery cells so that each battery cell forms a power supply unit, a positive output electrode electrically connected to the positive electrode of the power supply unit, and a negative output electrode electrically connected to the negative electrode of the power supply unit;

[0004] A jumper aluminum bar is used to electrically connect two adjacent battery modules (for example, to electrically connect two adjacent positive output electrodes, to electrically connect two adjacent negative output electrodes, or to electrically connect an adjacent positive output electrode and a negative output electrode).

[0005] Typically, the aluminum crossbars are welded to the output terminals and cannot be removed. Therefore, during subsequent production and maintenance, if a battery module fails, the entire battery pack must be discarded, resulting in high maintenance costs.

[0006] Therefore, it is necessary to improve the existing battery pack to solve the problem that the output pole cannot be disassembled, resulting in high maintenance costs.

[0007] The above information disclosed in this Background section is included only for enhancement of understanding of the background of the disclosure and therefore it may contain information that does not form the prior art that is currently known to a person of ordinary skill in the art. Summary of the Invention

[0008] One object of the present invention is to provide a battery assembly and a battery pack that can effectively solve the problem of high maintenance costs caused by the inability to disassemble the output pole.

[0009] To achieve the above objectives, the present invention provides a battery assembly, comprising:

[0010] At least two battery modules, each comprising a plurality of battery cells, a plurality of tabs electrically connecting two adjacent battery cells so that each battery cell forms a power supply unit, a positive output electrode electrically connected to the positive electrode of the power supply unit, and a negative output electrode electrically connected to the negative electrode of the power supply unit; wherein each of the positive output electrode and the negative output electrode is provided with an output electrode support seat;

[0011] A plurality of jumper conductive bars, through which the positive output electrodes and the negative output electrodes of two adjacent battery modules are electrically connected;

[0012] Wherein, the positive output electrode and / or the negative output electrode are detachably electrically connected to the jumper conductive bar via the output electrode support seat.

[0013] Optionally, one of the positive output poles is electrically connected to the power supply as a total positive output pole, one of the negative output poles serves as a total negative output pole, the total positive output pole and the total negative output pole are arranged at one end of the battery assembly, and the jumper conductive bar is at least arranged at the other end of the battery assembly away from the total positive output pole and the total negative output pole.

[0014] Optionally, each of the jumper conductive bars includes a first jumper bar and a third jumper bar arranged at the other end of the battery assembly away from the total positive output pole and the total negative output pole; and a second jumper bar arranged at one end of the battery assembly close to the total positive output pole and the total negative output pole, the lengths of the first jumper bar and the third jumper bar are greater than the length of the second jumper bar, and the lengths of the first jumper bar and the third jumper bar are equal.

[0015] Optionally, the jumper conductive bar includes a conductive body and an insulating injection molded part that is injection-molded and wrapped around the conductive body;

[0016] The conductive body includes two mounting parts and an arched part connected between the two mounting parts, and the arched part protrudes from the mounting parts along its own height direction; the insulating injection molded part is wrapped with an insulating layer on the outside corresponding to the arched part.

[0017] Optionally, the conductive body is copper;

[0018] The bar, the positive output electrode and the negative output electrode are all made of aluminum;

[0019] The flow area of ​​the conductive body is smaller than the flow area of ​​the aluminum bar.

[0020] Optionally, the positive output electrode and the negative output electrode have the same structure, both comprising a connecting portion electrically connected to the pole of the battery cell, an extending portion connected to the mounting portion of the conductive body, and a bent portion connected between the connecting portion and the extending portion;

[0021] Wherein, the outer surface of the extension portion is coated with a nickel coating.

[0022] Optionally, the output pole support seat includes an insulating base, a metal nut built into the insulating base, and an output pole bolt threadedly connected to the metal nut;

[0023] Bolt holes for the output electrode bolts to pass through are provided at the locations where the extensions of the positive output electrode and the negative output electrode are connected to the mounting portion of the crossover conductive bar;

[0024] The output pole support seat also includes an output pole cover that is snap-connected to the insulating base.

[0025] Optionally, the output pole cover includes a cover top plate snap-connected to the insulating base, and a plurality of easily breakable baffles connected to the edge of the cover top plate, wherein the easily breakable baffle corresponding to the side of the jumper conductive bar is broken to form a copper bar window with the groove on the insulating base, and the mounting portion of the jumper conductive bar can pass through the copper bar window and be connected to the extension portion of the positive output pole or the negative output pole in the output pole support seat;

[0026] Wherein, a thinning groove is provided at one end of the easily foldable baffle close to the cover top plate to gradually reduce the thickness of the easily foldable baffle to form an easily breakable structure.

[0027] Optionally, an escape window for the positive output pole or the negative output pole to pass through is provided between the cover top plate and the insulating base; and a buffer layer is further provided on the side of the cover top plate facing away from the output pole support seat.

[0028] In another aspect, a battery pack is provided, comprising:

[0029] A battery box body is provided with a plurality of box cross beams and the battery assembly described above, wherein the output pole support seat of the battery assembly is fixedly mounted on the box cross beams, and the width of the cross-connected conductive bar is smaller than the width of the box cross beams.

[0030] The present invention provides a battery assembly and battery pack that, through the intermediary structure of the output pole support, establishes a mechanically removable connection between the jumper bar and the output pole. In the event of a fault, simply disconnecting the output pole from the output pole support can isolate the problematic battery module without having to scrap the entire unit. This design maintains the reliability of the electrical connection while providing modular maintenance capabilities for the battery pack—the jumper bar and healthy battery modules can be repeatedly disassembled and reassembled, and faulty battery modules can be replaced individually. This avoids the traditional approach of scrapping the entire unit due to localized problems, significantly reducing material loss and time costs during production and maintenance.

[0031] Therefore, the battery assembly and battery pack provided by the present invention can effectively solve the problem of high maintenance costs caused by the inability to disassemble the output pole. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 A schematic diagram of a portion of the structure of a battery pack provided in an embodiment;

[0034] Figure 2 for Figure 1 A partial enlarged schematic diagram of point A in the middle;

[0035] Figure 3 for Figure 2 The schematic diagram after the output pole cover is hidden in the middle;

[0036] Figure 4 for Figure 1 The enlarged schematic diagram of the part with the output pole cover hidden at B in the middle;

[0037] Figure 5 A schematic diagram of the battery module layout of the battery pack provided in the embodiment;

[0038] Figure 6 A schematic cross-sectional view of an output pole support base provided in an embodiment;

[0039] Figure 7 An exploded schematic diagram of an output pole support provided in an embodiment;

[0040] Figure 8 A schematic structural diagram of a jumper conductive bar provided in an embodiment;

[0041] Figure 9 A current flow path diagram of a battery pack provided in an embodiment.

[0042] In the picture:

[0043] 1. Battery box; 101. Box crossbeam; 102. Box longitudinal beam;

[0044] 2. Battery module; 2a. First module; 2b. Second module; 2c. Third module; 2d. Fourth module; 201. Cell; 202. Tab; 203a. Positive output electrode; 203b. Negative output electrode; 2031. Nickel coating; 204. Output electrode support; 2041. Insulating base; 2041a. Avoidance window; 2041b. Groove; 2042. Metal nut; 2043. Output electrode bolt; 2044. Output electrode cover; 2044a. Cover top plate; 2044b. Foldable baffle; 2044c. Triangular thinning groove; 2044d. Buffer layer; 203a'. Total positive output electrode; 203b'. Total negative output electrode;

[0045] 3. Jumper conductive bar; 3a. First jumper bar; 3b. Second jumper bar; 3c. Third jumper bar; 301. Conductive body; 3011. Mounting portion; 3012. Arched portion; 302. Insulation layer; 303. Insulation injection molded part;

[0046] 4. Negative high voltage copper busbar;

[0047] 5. Positive high-voltage copper busbar. DETAILED DESCRIPTION

[0048] Reference to "embodiments" in the present invention means that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the word "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in the present invention, as long as there are no technical contradictions or conflicts, the various technical features mentioned in the embodiments can be combined in any manner to form a corresponding implementable technical solution.

[0049] Unless otherwise defined, the technical terms used herein have the same meanings as those generally understood by those skilled in the art to which the present invention belongs. The use of relevant terms herein is only for describing specific embodiments and is not intended to limit the present invention.

[0050] In the description of the present invention, the term "and / or" is used to describe a logical relationship between objects, indicating that three possible relationships exist. For example, A and / or B means: A exists, B exists, and both A and B exist. Furthermore, the character " / " generally indicates that the objects are in a logical "or" relationship.

[0051] In the present invention, terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0052] Without further restrictions, in the present invention, the words "include", "comprise", "have" or other similar expressions used in sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product that includes the elements, so that the process, method or product that includes a series of elements may include not only those limited elements, but also other elements that are not explicitly listed, or also include elements inherent to such process, method or product.

[0053] Consistent with the understanding in the Examination Guidelines, in the present invention, expressions such as "greater than," "less than," and "exceed" are understood to exclude the number itself; expressions such as "above," "below," and "within" are understood to include the number itself. Furthermore, in the description of the embodiments of the present invention, "multiple" means two or more (including two), and similar expressions related to "multiple," such as "multiple groups" and "multiple times," are also understood in this manner, unless otherwise specifically defined.

[0054] In the description of the embodiments of the present invention, the space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present invention or facilitating the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present invention.

[0055] Unless otherwise expressly specified or limited, in the description of the embodiments of the present invention, the terms "installed", "connected", "connected", "fixed", "set", etc. used should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be 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 those skilled in the art of the technology to which the present invention belongs, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0056] The present invention provides a battery assembly and a battery pack, which are suitable for the field of new energy vehicle battery packs. Through the intermediate structure of the output pole support seat, the jumper conductive bar and the output pole are mechanically detachable connected, thereby solving the problem of high maintenance costs caused by the inability to disassemble the output pole.

[0057] See also Figures 1 to 4 The battery pack provided in this embodiment includes a battery box 1 and a battery assembly arranged in the battery box 1.

[0058] Specifically, the battery assembly includes at least two battery modules 2 and a plurality of cross-connecting conductive bars 3 .

[0059] The battery module 2 includes a plurality of battery cells 201, a plurality of tabs 202 that electrically connect two adjacent battery cells 201 so that each battery cell 201 forms a power supply unit, a positive output electrode 203a electrically connected to the positive electrode of the power supply unit, and a negative output electrode 203b electrically connected to the negative electrode of the power supply unit. Each positive output electrode 203a and negative output electrode 203b is provided with an output electrode support 204.

[0060] The output pole support bases 204 of two adjacent battery modules 2 are electrically connected via the cross-connected conductive bar 3;

[0061] The positive output electrode 203a and / or the negative output electrode 203b are detachably electrically connected to the jumper conductive bar 3 via the output electrode support base 204. The output electrode support base 204, acting as an intermediary structure, establishes a mechanically detachable connection between the jumper conductive bar 3 and the output electrodes (positive output electrode 203a and negative output electrode 203b). In the event of a fault, simply disconnecting the output electrodes from the output electrode support base 204 can isolate the problematic battery module 2 without requiring the entire module to be scrapped.

[0062] The battery case 1 is equipped with several crossbars 101. One of these crossbars 101 divides the internal storage space of the battery case 1 into an electrical compartment and a battery compartment. The battery compartment houses the battery assembly, while the electrical compartment houses the electronic control components. The electrical compartment and the battery compartment are spaced apart along the length of the battery case 1, which corresponds to the length of the battery assembly. The output pole support 204 of the battery assembly is fixedly mounted on the crossbars 101. The width of the crossbar 3 is smaller than that of the crossbar 101, preventing the crossbar 3 from encroaching on the lateral space outside the crossbar 101, thereby improving space utilization.

[0063] See also Figure 5 and Figure 9 In this embodiment, four battery modules 2 are used as an example. These modules are designated as the first module 2a, the second module 2b, the third module 2c, and the fourth module 2d, and are arranged along the width of the battery assembly. The cells 201 within the battery modules 2 are arranged along the length of the battery assembly. Accordingly, three crossover conductive bars 3 are required, designated as the first crossover bar 3a, the second crossover bar 3b, and the third crossover bar 3c, to connect the battery modules 2.

[0064] In this embodiment, the negative output electrode 203b of the first module 2a is electrically connected to the negative high-voltage copper busbar 4 through the corresponding output electrode support 204, and is led outward from the negative high-voltage copper busbar 4 to the relevant electronic control components;

[0065] The positive output electrode 203a of the first module 2a is electrically connected to the first jumper row 3a through the corresponding output electrode support 204, and is electrically connected to the negative output electrode 203b of the second module 2b through the first jumper row 3a;

[0066] The positive output electrode 203a of the second module 2b is electrically connected to the second jumper row 3b through the corresponding output electrode support 204, and is electrically connected to the negative output electrode 203b of the third module 2c through the second jumper row 3b;

[0067] The positive output electrode 203a of the third module 2c is electrically connected to the third jumper row 3c through the corresponding output electrode support 204, and is electrically connected to the negative output electrode 203b of the fourth module 2d through the third jumper row 3c;

[0068] The positive output electrode 203a of the fourth module 2d is electrically connected to the positive high-voltage copper busbar 5 through the corresponding output electrode support base 204, and is led outward from the positive high-voltage copper busbar 5 to related electronic control components.

[0069] Specifically, the negative output pole 203b of the first module 2a, the positive output pole 203a of the second module 2b, the negative output pole 203b of the third module 2c, and the positive output pole 203a of the fourth module 2d are all arranged at the first end of the battery assembly in the length direction, and the positive output pole 203a of the first module 2a, the negative output pole 203b of the second module 2b, the positive output pole 203a of the third module 2c, and the negative output pole 203b of the fourth module 2d are all arranged at the second end of the battery assembly away from the first end, and the first end is close to the electrical compartment, thereby shortening the connection distance between the negative high-voltage copper bus 4 and the positive high-voltage copper bus 5 and the electronic control components, reducing resistance, improving space utilization, and facilitating the direct connection of the negative high-voltage copper bus 4 and the positive high-voltage copper bus 5 with the electronic control components in the electrical compartment, thereby improving the reliability of the connection between the negative high-voltage copper bus 4 and the positive high-voltage copper bus 5, and facilitating the operation of production line personnel, thereby improving production efficiency. One of the positive output poles 203a is electrically connected to the power supply as a total positive output pole 203a', one of the negative output poles 203b serves as a total negative output pole 203b', the total positive output pole 203a' and the total negative output pole 203b' are arranged at one end of the battery assembly, and the jumper conductive bar 3 is arranged at least at the other end of the battery assembly away from the total positive output pole 203a' and the total negative output pole 203b'.

[0070] The battery cells of the battery pack are connected in series as a whole, outputting a total positive output electrode 203a' and a total negative output electrode 203b', and at the same end, that is, the first end of the battery assembly. This high-voltage arrangement saves space inside the battery pack and is convenient for production line personnel to operate. Figure 9 As shown, the total positive output pole 203a' and the total negative output pole 203b' of the battery pack are both located on the side of the battery pack near the electrical compartment. This design ensures neat and beautiful high-voltage wiring, making it easier for production line personnel to connect the negative high-voltage copper busbar 4 and the positive high-voltage copper busbar to their electronic control components. It also shortens the length of the negative high-voltage copper busbar 4 and the positive high-voltage copper busbar 5, reducing resistance. At the same time, the total positive output pole 203a' and the positive high-voltage copper busbar 5 are fixed to the box crossbeam 101, and the total negative output pole 203b' and the negative high-voltage copper busbar 4 are fixed to the box crossbeam 101, using the output pole support base 204, improving the reliability and stability of the connection between each copper busbar and the output pole.

[0071] Each jumper bar 3 includes a first jumper bar 3a and a third jumper bar 3c, located at the end of the battery assembly facing away from the total positive output electrode 203a' and the total negative output electrode 203b'; and a second jumper bar 3b, located at the end of the battery assembly closer to the total positive output electrode 203a' and the total negative output electrode 203b'. The lengths of the first jumper bar 3a and the third jumper bar 3c are greater than the length of the second jumper bar 3b, and the lengths of the first jumper bar 3a and the third jumper bar 3c are equal. This shortens the length of each jumper bar 3, avoids excessive bending of the jumper bar 3, and saves space.

[0072] At the same time, a box longitudinal beam 102 is set in the battery box 1, and the box longitudinal beam 102 extends along the length direction of the battery box 1, dividing the battery compartment into two along the width direction of the battery box 1. Such a battery layout is not only convenient for the installation of the battery module 2, but also allows the second module 2b and the third module 2c to be located on both sides of the box longitudinal beam 102, respectively, and the positive output pole 203a of the second module 2b and the negative output pole 203b of the third module 2c are arranged close to each other, thereby shortening the length of the second jumper row 3b and saving material costs.

[0073] In this embodiment, no long copper busbars are required for bridging the battery pack. Instead, the total positive output pole 203a' is led out through the output pole support 204 near the electrical compartment of the battery pack. The total positive output pole 203a' is connected to the positive pole of the electronic control component via the positive high-voltage copper busbar 5. The total negative output pole 203b' is led out from the output pole support 204 near the electrical compartment of the battery pack. The total negative output pole 203b' is connected to the negative pole of the electronic control component via the negative high-voltage copper busbar 4. The total positive and negative poles of the electronic control component are then connected to the charging and discharging sockets via the total positive and negative poles of the electronic control component. This solution can improve the connection strength of the high-voltage structure of the battery pack near the electrical compartment through the overall high-tensile strength design, and improve the stability of the battery pack's electrical connection against vibration and impact.

[0074] The battery assembly and battery pack provided by the present invention, by introducing a detachable modular connection structure, effectively solves the high maintenance costs associated with traditional battery packs due to welding. By configuring each output pole with an independent output pole support 204, the electrical connection between adjacent battery modules 2 no longer relies on permanent welding, but is instead achieved through removable jumper conductive bars 3.

[0075] In traditional solutions, once a battery module 2 fails, the jumper aluminum bar is welded to the output pole, requiring destructive removal for maintenance. This is not only complex but can also affect healthy modules, often requiring the entire battery pack to be scrapped. However, this solution uses the output pole support base 204 as an intermediary structure to create a mechanically removable connection (such as a bolt or plug) between the jumper conductive bar 3 and the output pole. In the event of a failure, simply disconnecting the output pole from the output pole support base 204 isolates the problematic battery module 2 without scrapping the entire module. This design maintains the reliability of the electrical connection while giving the battery pack modular maintenance capabilities—the jumper conductive bar 3 and healthy battery modules 2 can be repeatedly disassembled and re-used, and faulty battery modules 2 can be replaced individually, avoiding the traditional practice of scrapping the entire module due to local problems. This significantly reduces material loss and time costs in production and maintenance.

[0076] Therefore, the battery assembly and battery pack provided by the present invention can effectively solve the problem of high maintenance costs caused by the inability to disassemble the output pole.

[0077] In this embodiment, see Figure 4 and Figure 8 The crossover conductive bar 3 includes a conductive body 301 and an insulating injection molded part 303 which is injection molded and wrapped around the conductive body 301;

[0078] The conductive body 301 includes two mounting portions 3011 and an arched portion 3012 connected between the two mounting portions 3011. The arched portion 3012 protrudes from the mounting portions 3011 along its own height direction. The insulating injection molded part 303 is wrapped with an insulating layer 302 on the outside of the arched portion 3012. Furthermore, the conductive body 301 is made of copper.

[0079] Copper's elongation at break is generally over 30%, while aluminum's is only 18%. Copper's tensile strength is 200 MPa, while aluminum's is only 40-50 MPa, making aluminum more susceptible to breaking than copper. The copper conductive body 301 has greater ductility than aluminum. When the battery pack vibrates, the copper conductive body 301 absorbs some of the vibration energy through internal deformation, thereby reducing the vibration impact on the connection between the jumper conductive bar 3 and the output terminal, improving the reliability of the connection between the jumper conductive bar 3 and the output terminal.

[0080] Copper is used instead of aluminum as the conductive body 301. The overcurrent of copper is generally 1.7 times that of aluminum. That is, a narrower copper busbar can meet the overcurrent capacity of the aluminum busbar. This is beneficial in that the width of the bridging conductive busbar 3 does not exceed the width of the beam inside the battery box 1, thereby meeting the overcurrent requirement and avoiding the problem of low lateral space utilization caused by the use of the bridging aluminum busbar.

[0081] Furthermore, the end of the conductive body 301 is exposed outside the insulating layer 302 to facilitate electrical connection with the output electrode within the output electrode support base 204. The insulating injection molded part 303 and the insulating layer 302 not only cover the middle portion of the conductive body 301, preventing electrical connection between the middle portion of the conductive body 301 and other components, which could cause electrical accidents, but also improve the structural strength of the conductive body 301. In particular, when the conductive body 301 is made of a relatively low-hardness metal such as copper, the insulating layer 302 can prevent excessive deformation of the conductive body 301 due to insufficient structural strength, thereby improving the overall structural stability of the conductive body 301.

[0082] In this embodiment, the tab 202, the positive output electrode 203a, and the negative output electrode 203b are all made of aluminum. The flow area of ​​the conductive body 301 is smaller than that of the aluminum tab. Specifically, the flow area refers to the cross-sectional area perpendicular to the length direction.

[0083] The tabs 202 and output electrodes are relatively large, so using aluminum helps reduce costs. Furthermore, the aluminum tabs can be appropriately widened and / or thickened to increase their flow area to a greater extent than the conductive body 301, thereby enabling the aluminum tabs to meet the flow requirements of the copper conductive body 301.

[0084] See also Figure 6 and Figure 7 The positive output electrode 203a and the negative output electrode 203b have the same structure, both including a connecting portion 2032 electrically connected to the pole of the battery cell 201, an extending portion 2033 connected to the mounting portion 3011 of the conductive body, and a bending portion 2034 connected between the connecting portion 2032 and the extending portion 2033; wherein the outer surface of the extending portion 2033 is coated with a nickel coating 2031.

[0085] Aluminum tabs are relatively inexpensive, but they are easily crushed when tightening the output pole bolts 2043. Therefore, the tightening torque for the output pole bolts 2043 is typically low, which can lead to subsequent loosening due to vibration. In this embodiment, the output pole is constructed of aluminum with nickel, which improves the structural strength of the output pole at the locking position of the output pole bolts 2043 and prevents direct damage to the aluminum output pole during tightening. This increases the tightening torque for the output pole bolts 2043, thereby enhancing the secure locking of the output pole and the jumper conductive bar 3.

[0086] In this embodiment, the output pole support base 204 includes an insulating base 2041, a metal nut 2042 built into the insulating base 2041, and an output pole bolt 2043 threadedly connected to the metal nut 2042;

[0087] Bolt holes for the output electrode bolts 2043 to pass through are provided at the locations where the extension portions 2033 of the positive output electrode 203 a and the negative output electrode 203 b are connected to the mounting portion 3011 of the jumper conductive bar 3 .

[0088] Furthermore, a plurality of box crossbeams 101 are provided inside the battery box 1, and the insulating base 2041 of the output pole support 204 is fixedly mounted on the box crossbeams 101, so as to facilitate fixing the output pole and the cross-connection conductive bar 3 on the box crossbeams 101, thereby improving their stability and reliability.

[0089] Optionally, the output pole support base 204 further includes an output pole cover 2044 that is snap-connected to the insulating base 2041. Specifically, the output pole cover 2044 includes a cover top plate 2044a snap-connected to the insulating base 2041, and a plurality of easily breakable baffles 2044b connected to the edges of the cover top plate 2044a. The easily breakable baffles 2044b corresponding to one side of the jumper conductive bar 3 are broken to form a copper bar window with the groove 2041b on the insulating base 2041. The mounting portion 3011 of the jumper conductive bar 3 can pass through the copper bar window and connect to the extension portion 2033 of the positive output pole 203a or the negative output pole 203b within the output pole support base 204.

[0090] Among them, a triangular thinning groove 2044c is provided at one end of the easily breakable baffle 2044b close to the cover top plate 2044a to gradually reduce the thickness of the easily breakable baffle 2044b to form an easily breakable structure.

[0091] Grooves 2041b can be provided on multiple sides of the insulating base 2041 away from the output pole to expose the metal nuts 2042 within. The openings of the grooves 2041b face upward, allowing the jumper conductive bar 3 to pass directly through the grooves 2041b from top to bottom and connect to the output pole, improving installation convenience. The grooves 2041b and the cover top plate 2044a, with the frangible baffles 2044b broken off, form a copper busbar window for the jumper conductive bar 3 to pass through. The grooves 2041b cooperate with the unbroken frangible baffles 2044b, so that when no jumper conductive bar 3 passes through, the frangible baffles 2044b can shield the grooves 2041b, preventing foreign matter from entering the insulating base 2041 and reducing the risk of short circuits.

[0092] Furthermore, a clearance window 2041a for the output pole to pass through is provided between the cover top plate 2044a and the insulating base 2041. Grooves 2041b can be provided on the three sides of the insulating base 2041 away from the output pole, and easily breakable baffles 2044b can be provided on the three sides of the cover top plate 2044a away from the output pole, corresponding one-to-one with the grooves 2041b. Thus, the easily breakable baffles 2044b can be broken off as needed on each of the three sides of the insulating base 2041 away from the output pole, allowing the copper busbar to pass through for connection. In this embodiment, the grooves 2041b corresponding to the clearance window 2041a can accommodate the positive high-voltage copper busbar or the negative high-voltage copper busbar.

[0093] Before installing the output pole cover 2044, first extend one end of the output pole and the jumper bar 3 into the insulating base 2041. Use the output pole bolt 2043 to lock the jumper bar 3 and the output pole to the metal nut 2042, thereby achieving electrical connection between the jumper bar 3 and the output pole. Next, break the easily breakable baffle 2044b corresponding to the jumper bar 3 according to the orientation of the jumper bar 3. This creates a copper bus window with the insulating base 2041 for the jumper bar 3 to pass through. This prevents the cover top plate 2044a from obstructing the copper bus window and interfering with the jumper bar 3. It also ensures that other grooves on the insulating base 2041 are covered by the unbroken easily breakable baffle 2044b, improving installation efficiency. Finally, the cover top plate 2044a is fastened and fixed to the insulating base 2041. The provision of the easily breakable baffle 2044 b can improve the overall versatility. The corresponding easily breakable baffle 2044 b can be broken according to the different orientation requirements of the jumper conductive bar 3, thereby reducing costs.

[0094] Optionally, a buffer layer 2044d is further provided on the side of the cover top plate 2044a facing away from the output pole support seat 204. After the battery box cover is installed, the battery box cover presses down on the buffer layer 2044d to prevent the cover top plate 2044a from loosening. The tightness of the buffer layer 2044d can also prevent the transmission of vibration caused by the contact between the battery box cover and the cover top plate 2044a.

[0095] In summary, the battery module 2 and battery pack provided in this embodiment have at least the following advantages:

[0096] ① Modular detachable connection: The output pole support base 204 is used to achieve a mechanical detachable connection (such as bolt fixing) between the jumper conductive bar 3 and the output pole, avoiding welding damage, supporting the inspection and replacement of a single module, and reducing maintenance costs.

[0097] ② Optimized performance of the copper conductive body 301: High-ductility, high-strength copper is used as the material for the jumper conductive bus 3 to improve vibration and impact resistance and enhance connection reliability, while reducing the width to meet space constraints.

[0098] ③ Double protection of the insulating layer 302: covering the middle position of the conductive body 301, it not only prevents electrical short circuits but also enhances structural stability, especially compensating for the defect of insufficient hardness of copper material.

[0099] ④ Output pole cover 2044 safety protection: The foldable baffle design flexibly adapts to the direction of the cross-connected conductive bar 3. When the cover is buckled, it provides physical isolation to avoid accidental contact with conductive parts.

[0100] ⑤ Aluminum with nickel coating 2031 to enhance locking: The output pole contact surface is coated with nickel to improve the tolerance of the output pole bolt 2043 tightening torque, prevent aluminum material from being damaged and reduce the risk of vibration loosening.

[0101] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concepts of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.

Claims

1. A battery assembly, characterized in that: include: At least two battery modules (2), the battery modules (2) comprising a plurality of battery cells (201), a plurality of tabs (202) electrically connecting two adjacent battery cells (201) so that each of the battery cells (201) forms a power supply unit, a positive output electrode (203a) electrically connected to the positive electrode of the power supply unit, and a negative output electrode (203b) electrically connected to the negative electrode of the power supply unit; wherein each of the positive output electrode (203a) and the negative output electrode (203b) is correspondingly provided with an output electrode support seat (204); A plurality of cross-connecting conductive bars (3), wherein the positive output poles (203a) and the negative output poles (203b) of two adjacent battery modules (2) are electrically connected via the cross-connecting conductive bars (3); The positive output pole (203a) and / or the negative output pole (203b) are detachably electrically connected to the jumper conductive bar (3) via the output pole support seat (204).

2. The battery assembly according to claim 1, wherein: One of the positive output poles (203a) is electrically connected to the power supply as a total positive output pole (203a'), one of the negative output poles (203b) serves as a total negative output pole (203b'), the total positive output pole (203a') and the total negative output pole (203b') are arranged at one end of the battery assembly, and the jumper conductive bar (3) is at least arranged at the other end of the battery assembly away from the total positive output pole (203a') and the total negative output pole (203b').

3. The battery assembly according to claim 2, wherein: Each of the jumper conductive bars (3) comprises a first jumper bar (3a) and a third jumper bar (3c) arranged at the other end of the battery assembly away from the total positive output pole (203a') and the total negative output pole (203b'); and a second jumper bar (3b) arranged at one end of the battery assembly close to the total positive output pole (203a') and the total negative output pole (203b'), wherein the lengths of the first jumper bar (3a) and the third jumper bar (3c) are greater than the length of the second jumper bar (3b), and the lengths of the first jumper bar (3a) and the third jumper bar (3c) are equal.

4. The battery assembly according to claim 1, wherein: The jumper conductive bar (3) comprises a conductive body (301) and an insulating injection molded part (303) injection-molded and wrapped around the outside of the conductive body (301); The conductive body (301) comprises two mounting portions (3011) and an arched portion (3012) connected between the two mounting portions (3011), wherein the arched portion (3012) protrudes from the mounting portions (3011) along its own height direction; and the insulating injection molded part (303) is wrapped with an insulating layer (302) on the outside corresponding to the arched portion (3012).

5. The battery assembly according to claim 4, characterized in that The conductive body (301) is copper; The bar (202), the positive output electrode (203a) and the negative output electrode (203b) are all aluminum bar sheets; The flow area of ​​the conductive body (301) is smaller than the flow area of ​​the aluminum bar.

6. The battery assembly according to claim 4, characterized in that The positive output electrode (203a) and the negative output electrode (203b) have the same structure, both comprising a connecting portion (2032) electrically connected to the pole of the battery cell (201), an extending portion (2033) connected to the mounting portion (3011) of the conductive body (301), and a bending portion (2034) connected between the connecting portion (2032) and the extending portion (2033); The outer surface of the extension portion (2033) is coated with a nickel coating (2031).

7. The battery assembly according to claim 4, characterized in that The output pole support seat (204) comprises an insulating base (2041), a metal nut (2042) built into the insulating base (2041), and an output pole bolt (2043) threadedly connected to the metal nut (2042); Bolt holes for the output pole bolts (2043) to pass through are provided at the locations where the extension portions (2033) of the positive output pole (203a) and the negative output pole (203b) are connected to the mounting portion (3011) of the crossover conductive bar (3); The output pole support seat (204) further comprises an output pole cover (2044) snap-connected to the insulating base (2041).

8. The battery assembly according to claim 7, characterized in that The output pole cover (2044) comprises a cover top plate (2044a) snap-connected to the insulating base (2041), and a plurality of easily foldable baffles (2044b) connected to the edge of the cover top plate (2044a), wherein the easily foldable baffle (2044b) corresponding to one side of the jumper conductive bar (3) is broken to form a copper bar window with the groove (2041b) on the insulating base (2041), and the mounting portion (3011) of the jumper conductive bar (3) can pass through the copper bar window and be connected to the extension portion (2033) of the positive output pole (203a) or the negative output pole (203b) in the output pole support seat (204); Wherein, a thinning groove (2044c) is provided at one end of the easily foldable baffle (2044b) close to the cover top plate (2044a) to gradually reduce the thickness of the easily foldable baffle (2044b) to form an easily breakable structure.

9. The battery assembly according to claim 8, characterized in that An escape window (2041a) for the positive output pole (203a) or the negative output pole (203b) to pass through is provided between the cover top plate (2044a) and the insulating base (2041); a buffer layer (2044d) is also provided on the side of the cover top plate (2044a) facing away from the output pole support seat (204).

10. A battery pack, characterized in that: include: A battery box (1), wherein a plurality of box cross beams (101) and a battery assembly according to any one of claims 1 to 9 are provided inside the battery box (1), wherein the output pole support seat (204) of the battery assembly is fixedly mounted on the box cross beam (101), and the width of the cross-connecting conductive bar (3) is smaller than the width of the box cross beam (101).

Images