CCS assembly, battery pack and assembly process thereof

Abstract

The invention relates to the technical field of batteries, and discloses a CCS assembly, a battery pack and an assembly process thereof.The CCS assembly is used for achieving connection of at least two battery modules, the two battery modules are arranged side by side, the sides, with electrodes, of the two battery modules jointly form a supporting face, and the CCS assembly comprises a support body; a first containing area and a second containing area which are located in the same horizontal plane are arranged on the base, and the projection of the first containing area and the projection of the second containing area in the direction perpendicular to the supporting face are located in the supporting face. The first conductive part is arranged in the first accommodating area, and is welded with the electrodes of the battery modules through the first conductive part, so that a series circuit can be formed by a plurality of battery cells in a single battery module; and the second conductive piece is arranged in the second accommodating area, and two ends of the second conductive piece can be respectively welded with the electrodes of the two battery modules, so that the two battery modules form a series circuit. The invention has the advantages of high assembly efficiency and low production cost.

Description

Technical Field

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

[0002] In the design of traditional large-capacity battery packs, a structure in which multiple groups of battery modules are connected in parallel or in series is usually adopted to improve energy output. Each group of battery modules needs to be independently configured with a CCS (Cell Contact System) component to realize the collection, monitoring and electrical connection of the battery cells. In order to achieve the miniaturized design of the battery pack, the internal space of the battery pack shell is usually small and can only accommodate the battery modules, and welding operations are not allowed. Therefore, the existing battery modules must be welded to the CCS components before being placed in the battery pack shell. This requires the battery pack to be additionally configured with copper bars that are detachably connected to the two CCS components to realize the series connection of the two battery modules. This not only increases the complexity of the battery pack assembly process, reduces assembly efficiency, but also increases production costs. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a CCS component, a battery pack and an assembly process thereof with high assembly efficiency and low production cost.

[0004] The technical solution adopted by the present invention to solve the technical problem is to provide a CCS assembly for connecting at least two groups of battery modules, wherein the two groups of battery modules are arranged side by side, and the sides of the two groups with electrodes jointly form a supporting surface, and the CCS assembly comprises:

[0005] A bracket body, wherein a first accommodating area and a second accommodating area are provided on the bracket body and are located in the same horizontal plane, and projections of the first accommodating area and the second accommodating area in a direction perpendicular to the supporting surface are located within the supporting surface;

[0006] A first conductive member, wherein the first conductive member is disposed in the first accommodating area, and the first conductive member is welded to the electrode of the battery module so that a plurality of cells in a single battery module can form a series circuit;

[0007] The second conductive member is disposed in the second accommodating area, and two ends of the second conductive member can be respectively welded to electrodes of the two groups of battery modules, so that the two groups of battery modules form a series circuit.

[0008] Further, the first accommodating area is provided with a plurality of first positioning grooves, the second accommodating area is provided with a second positioning groove, and the size of the first positioning groove is adapted to the size of the first conductive member, and the size of the second positioning groove is adapted to the size of the second conductive member.

[0009] Furthermore, each group of the battery modules includes a plurality of battery cells arranged side by side, each of the first positioning grooves is located above the electrodes of two adjacent battery cells in the same battery cell module, and the second positioning groove is located above the electrodes of two adjacent battery cells between two battery cell modules.

[0010] Furthermore, a mainstream channel and a plurality of diversion channels are provided on the bracket body, the mainstream channel extends in a direction perpendicular to the second positioning groove, the plurality of second positioning grooves extend in a direction perpendicular to the first positioning groove respectively, and are connected to the mainstream channel, and the heights of the mainstream channel and the diversion channels are lower than or parallel to the heights of the first positioning groove and the second positioning groove.

[0011] Furthermore, there are multiple first conductive members, and the CCS assembly also includes multiple wires corresponding to the number of the first conductive members and the second conductive members, and one end of the wire is connected to the first conductive member or the second conductive member, and the other end is connected to the main circuit board along the diversion channel and the main flow channel.

[0012] Furthermore, the bracket body is also provided with a plurality of adjustment circuit boards corresponding to the number of the first conductive parts and the second conductive parts, and the wire is connected to the first conductive part or the second conductive part through the adjustment circuit board; when the current exceeds a preset value, the adjustment circuit board can disconnect the electrical connection between the wire and the first conductive part or the second conductive part.

[0013] Furthermore, at least one fixing part and a connecting member are provided on the regulating circuit board, the electric wire is connected to the fixing part, the connecting member is connected to the first conductive member or the second conductive member, and the fixing part and the connecting member are connected via a fuse structure.

[0014] Furthermore, the bracket body is also provided with a first positioning column, the adjustment circuit board is provided with a first fixing hole for the first positioning column to pass through, and the adjustment circuit board is fixed to the bracket body through the first positioning column.

[0015] Furthermore, a second positioning column is provided in the first positioning groove and the second positioning groove respectively, the first conductive member and the second conductive member have a second fixing hole for the second positioning column to pass through, and the first conductive member and the second conductive member are fixed in the first positioning groove or the second positioning groove through the second positioning column.

[0016] Furthermore, the first conductive member and / or the second conductive member is rectangular and made of aluminum; the first conductive member and / or the second conductive member is provided with a first positioning hole and a second positioning hole, and the first positioning hole and the second positioning hole correspond one-to-one to at least two electrode welding positions of the battery module.

[0017] Furthermore, an adjusting portion is provided on the first conductive member and / or the second conductive member, and the adjusting portion is located between the first positioning hole and the second positioning hole and protrudes in a direction perpendicular to the first conductive member and / or the second conductive member.

[0018] The technical solution adopted by the present invention to solve the technical problem is to further provide a battery pack, including:

[0019] A battery module, wherein the battery module is provided with at least two groups;

[0020] A CCS assembly, the CCS assembly comprising a bracket body, a first conductive member and a second conductive member;

[0021] The bracket body is provided with a first accommodating area and a second accommodating area;

[0022] The first conductive member is disposed in the first accommodating area, and the first conductive member is welded to the electrode of the battery module, so that a plurality of cells in a single battery module can form a series circuit;

[0023] The second conductive member is disposed in the second accommodating area, and two ends of the second conductive member can be respectively welded to electrodes of the two groups of battery modules, so that the two groups of battery modules form a series circuit;

[0024] The shell comprises a bottom plate having a receiving groove; when the battery module and the CCS component are located in the receiving groove, a welding space is provided between the receiving groove and the CCS component.

[0025] Furthermore, the accommodating groove includes a side wall extending along the stacking direction of the battery module and the CCS assembly, and the extension length of the side wall is less than the straight-line distance from the bottom of the bracket body to the accommodating groove.

[0026] Furthermore, the shell body also includes a shell cover detachably connected to the base plate, and the shell cover is provided with a handle, the accommodating groove includes a side wall extending along the stacking direction of the battery module and the CCS assembly, and the extension length of the side wall is less than the straight-line distance from the bottom of the handle to the accommodating groove.

[0027] Furthermore, the shell cover includes a top cover and a front cover, the top cover is detachably connected to the bottom plate, the front cover is plug-fitted with the top cover and the bottom plate respectively, and the front cover is provided with a reinforcing sheet detachably connected to the bottom plate.

[0028] Furthermore, a reinforcing rib is provided on a side of the top cover opposite to the bracket body; when the shell is lifted by the handle, the reinforcing rib can suppress the deformation of the top cover when it is subjected to force.

[0029] Furthermore, a plurality of reinforcing ribs are provided, and a setting direction of at least one of the reinforcing ribs is perpendicular to the pulling direction.

[0030] The technical solution adopted by the present invention to solve the technical problem is to further provide a battery pack assembly process for assembling the above-mentioned battery pack, comprising the following steps:

[0031] Placing at least two of the battery modules side by side on the bottom plate;

[0032] Placing the CCS assembly on the two battery modules, and aligning the first conductive member and the second conductive member with the electrodes on the battery modules respectively;

[0033] Welding the first conductive member and the second conductive member to corresponding electrodes on the battery module in sequence;

[0034] Insert the front cover onto the bottom plate, and make the reinforcing sheet fit the side wall of the bottom plate;

[0035] The top cover is placed on the bottom plate and plugged with the front cover so that the side wall of the top cover fits with the side wall of the bottom plate, and then the reinforcing sheet, the side wall of the top cover and the side wall of the bottom plate are connected by fasteners.

[0036] Compared with the prior art, the present invention has at least the following beneficial effects:

[0037] 1. In the present invention, by setting the first accommodating area and the second accommodating area on the bracket body, and setting the first conductive member in the first accommodating area, and setting the second conductive member in the second accommodating area, by welding the first conductive member with the electrode of the battery module, multiple cells in a single battery module can form a series circuit, and by making the two ends of the second conductive member respectively welded with the electrodes of the two groups of battery modules, the two groups of battery modules can form a series circuit. This integrated design integrates the bracket body, the first conductive member and the second conductive member into one, which not only eliminates the need for additional external copper busbars and related fastening structures, effectively reducing production costs, but also supports multiple groups of battery modules and CCS modules to be welded in series at one time, significantly improving assembly efficiency.

[0038] 2. In the present invention, a main flow channel and a plurality of branch flow channels that are interconnected are provided on the bracket body, and the heights of the main flow channel and the branch flow channels are made lower than or parallel to the heights of the first positioning groove and the second positioning groove, thereby achieving orderly arrangement of a plurality of wires and avoiding interference of the wiring harness formed by the plurality of wires with the welding of the first conductive member and the second conductive member, thereby effectively improving the convenience of the welding process of the first conductive member and the second conductive member and ensuring the reliability of the process.

[0039] 3. In the present invention, a plurality of wires are arranged in the mainstream channel and the shunt channel, and the main circuit board is connected with the first conductive member and the second conductive member through the wires, that is, a wiring harness is used to replace the original flexible circuit board. While ensuring the effective circuit connection, it not only significantly reduces the production cost, but also reduces the occupation of the internal space of the battery pack through the cooperation with the mainstream channel and the shunt channel, and improves the convenience of welding the first conductive member and the second conductive member. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the structure of the CCS component in the present invention.

[0041] Figure 2 It is an exploded view of the CCS assembly in the present invention.

[0042] Figure 3 It is a schematic diagram of the structure of the CCS component assembled on the battery module in the present invention.

[0043] Figure 4 It is a schematic diagram of the structure of the support body in the present invention.

[0044] Figure 5 It is a schematic diagram of the structure of a battery pack in the present invention.

[0045] Figure 6 An exploded view of a battery pack in the present invention.

[0046] Figure 7 It is a cross-sectional view of a battery pack in the present invention.

[0047] Figure 8 for Figure 7 Enlarged view of point A in the middle.

[0048] Fig. 9 It is a schematic diagram of the deformation direction of the top cover in the present invention.

[0049] In all the drawings, the same reference numerals represent the same technical features, specifically: 100, bracket body; 110, first positioning groove; 120, second positioning groove; 130, mainstream channel; 140, diversion channel; 150, adjustment circuit board; 151, fixing part; 152, connecting member; 153, first fixing hole; 160, first positioning column; 170, second positioning column; 180, groove; 200, first conductive member; 210, first positioning hole; 220, second positioning hole; 230, adjustment part; 240, second fixing hole; 300, second conductive member; 400, wire; 500, battery module; 510, battery cell; 600, shell; 610, bottom plate; 611, accommodating groove; 620, shell cover; 621, top cover; 622, front cover; 623, reinforcing rib; 700, reinforcing sheet; 800, main circuit board; 900, handle. DETAILED DESCRIPTION

[0050] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0051] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0052] In addition, in the present invention, descriptions such as "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0053] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical 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, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0055] like Figures 1 to 4 As shown, an embodiment of the present invention provides a CCS assembly for connecting at least two battery modules 500, wherein the two battery modules 500 are arranged side by side, and the sides of the two modules with electrodes together form a supporting surface, and the CCS assembly includes:

[0056] The support body 100 is provided with a first accommodating area and a second accommodating area in the same horizontal plane, and the projections of the first accommodating area and the second accommodating area in a direction perpendicular to the support surface are in the support surface;

[0057] The first conductive member 200 is disposed in the first accommodation area. By welding the first conductive member 200 to the electrodes of the battery module 500, a plurality of battery cells 510 in a single battery module 500 can form a series circuit.

[0058] The second conductive member 300 is disposed in the second accommodation area, and the two ends of the second conductive member 300 can be respectively welded to the electrodes of the two battery modules 500, so that the two battery modules 500 form a series circuit. This design integrates the bracket body 100, the first conductive member 200 and the second conductive member 300 into one, realizing an integrated design, which not only eliminates the need for additional external copper bars and related fastening structures, effectively reducing production costs, but also supports multiple battery modules 500 and CCS components to be welded in series at one time, significantly improving assembly efficiency.

[0059] Specifically, if Figures 1 to 4 As shown, in this embodiment, the CCS component is mainly used to realize the series connection of the battery cells 510 inside the battery module 500 and the series connection between at least two groups of battery modules 500, wherein the two groups of battery modules 500 are arranged side by side, each battery module 500 includes a plurality of battery cells 510 arranged side by side in a line, each battery cell 510 is provided with an electrode, and the two groups of battery modules 500 with one side of the electrode together constitute a rectangular supporting surface for realizing the support of the CCS component.

[0060] In this embodiment, the CCS assembly includes a rectangular bracket body 100, which is made of insulating material, preferably a plastic part. This design not only realizes the lightweight design of the CCS assembly, but also ensures the safety of the battery module 500, while reducing the production cost.

[0061] In this embodiment, the bracket body 100 is provided with a first accommodating area and a second accommodating area in the same horizontal plane for installing the first conductive member 200 and the second conductive member 300, wherein the projections of the first accommodating area and the second accommodating area in a direction perpendicular to the supporting surface are within the supporting surface. This design integrates the installation positions of the first conductive member 200 and the second conductive member 300 on the bracket body 100, ensuring that the first conductive member 200 and the second conductive member 300 are connected to the battery module 500 within the supporting surface. Compared with the external copper busbar in the prior art, it can not only save the arrangement of the copper busbar and its related connection structure, but also reduce the occupation of the horizontal space inside the battery pack.

[0062] In this embodiment, the first accommodating area is in a concave shape, and the second accommodating area is in a rectangular shape. The second accommodating area is in the concave notch of the first accommodating area, and the two can cooperate to form a rectangular area adapted to the size of the supporting surface. It is worth noting that the position of the second accommodating area can be set on the side of the concave notch close to the main circuit board 800 or away from the side of the main circuit board 800 or in the middle position, and can be set across two adjacent groups of battery modules 500. Preferably, the position of the second accommodating area is set on the side of the first accommodating area away from the main circuit board 800. This design can simplify the complexity of the electrical circuit layout on the one hand, and improve the convenience of welding on the other hand.

[0063] In this embodiment, a plurality of first positioning grooves 110 are provided in the first accommodation area, and a second positioning groove 120 is provided in the second accommodation area, and the size of the first positioning groove 110 is adapted to the size of the first conductive member 200, and the size of the second positioning groove 120 is adapted to the size of the second conductive member 300. This design realizes the positioning of the assembly of the first conductive member 200 and the second conductive member 300, improves the assembly accuracy of the first conductive member 200 and the second conductive member 300, and can also pre-fix the first conductive member 200 and the second conductive member 300.

[0064] Preferably, in this embodiment, the first positioning groove 110 and the second positioning groove 120 are both rectangular, wherein each first positioning groove 110 is horizontally arranged along the arrangement direction of two adjacent battery cells 510 of the same battery module 500, and each first positioning groove 110 is located directly above the electrodes of two adjacent battery cells 510 of the same battery cell 510 module, and the second positioning groove 120 is horizontally arranged along the arrangement direction of two adjacent battery modules 500, and is located directly above the electrodes of two adjacent battery cells 510 between two battery modules 500. This design allows the first conductive member 200 and the second conductive member 300 to correspond precisely to the corresponding battery cells 510, ensuring the welding accuracy of the first conductive member 200 and the second conductive member 300.

[0065] In this embodiment, a cylindrical second positioning column 170 is provided in the first positioning groove 110 and the second positioning groove 120, respectively, and a circular second fixing hole 240 for the second positioning column 170 to pass through is provided on the first conductive member 200 and the second conductive member 300, and the first conductive member 200 and the second conductive member 300 are fixed in the first positioning groove 110 or the second positioning groove 120 through the second positioning column 170. Through the matching design of the second positioning column 170 and the second fixing hole 240, the first conductive member 200 and the second conductive member 300 are installed quickly, stably and accurately. This design not only improves the reliability of the electrical connection, but also enhances the stability of the mechanical structure, and is suitable for application scenarios requiring high precision and high stability.

[0066] Preferably, in this embodiment, two groups of second fixing holes 240 are provided on each of the first conductive member 200 and the second conductive member 300, and the number of the second positioning posts 170 is equal to the number of the second fixing holes 240 and corresponds to each other, wherein the diameter of the second fixing hole 240 is slightly larger than the diameter of the second positioning post 170, the length of the second positioning post 170 is larger than the depth of the second fixing hole 240, and the second positioning post 170 is riveted to the first conductive member 200 and the second conductive member 300. This design further improves the reliability of the assembly of the first conductive member 200 and the second conductive member 300.

[0067] In traditional CCS designs, a flexible circuit board is usually used to connect the battery module 500 with the main circuit board 800. In order to fix the flexible circuit board, a corresponding fixing structure needs to be additionally arranged on the bracket body 100, which not only increases the production cost of the CCS assembly, but also takes up space on the bracket body 100.

[0068] In this embodiment, since the second conductive member 300 is integrated on the bracket body 100, directly using a traditional flexible circuit board may interfere with the installation space of the second conductive member 300. Therefore, in this embodiment, a wire harness is used to replace the flexible circuit board, and a main flow channel 130 and a plurality of branch flow channels 140 for arranging the wire harness are provided on the bracket body 100; on the one hand, interference with the installation space of the second conductive member 300 is avoided, and on the other hand, the structure is simplified, effectively reducing the production cost.

[0069] In this embodiment, one end of the mainstream channel 130 is perpendicular to the main circuit board 800, and the other end extends in a direction perpendicular to the second positioning groove 120. The plurality of second positioning grooves 120 extend in a direction perpendicular to the first positioning groove 110 and are vertically connected to the mainstream channel 130. The heights of the mainstream channel 130 and the diversion channel 140 are lower than or parallel to the heights of the first positioning groove 110 and the second positioning groove 120. This design allows the wiring harness to bypass the first positioning groove 110 and the second positioning groove 120, avoiding interference with the installation space of the first conductive member 200 and the second conductive member 300, and also simplifies the overall structure of the bracket body 100.

[0070] In this embodiment, the wiring harness includes a plurality of wires 400 corresponding to the number of the first conductive member 200 and the second conductive member 300, and one end of the wire 400 is connected to the first conductive member 200 or the second conductive member 300, and the other end is connected to the main circuit board 800 along the diversion channel 140 and the main channel 130, so that the battery module 500 can form an electrical connection with the main circuit board 800.

[0071] In this embodiment, the bracket body 100 is further provided with a plurality of regulating circuit boards 150 corresponding to the number of the first conductive members 200 and the second conductive members 300, and the wires 400 are connected to the first conductive members 200 or the second conductive members 300 through the regulating circuit boards 150; when the current exceeds a preset value, the regulating circuit boards 150 can disconnect the electrical connection between the wires 400 and the first conductive members 200 or the second conductive members 300. By introducing the regulating circuit boards 150, overcurrent protection is formed for each battery cell 510, which prevents the circuit from short-circuiting due to excessive current, and effectively improves the safety of the system and the service life of the CCS components.

[0072] In this embodiment, the regulating circuit board 150 is in the shape of a rectangular strip, and the four corners of the regulating circuit board 150 are rounded. Among them, each regulating circuit board 150 is provided with at least one fixing portion 151 and a connecting member 152, the end of the wire 400 facing away from the main circuit board 800 is connected to the fixing portion 151, the end of the connecting member 152 facing away from the regulating circuit board 150 is connected to the first conductive member 200 or the second conductive member 300, and the fixing portion 151 and the connecting member 152 are connected through a fuse structure (not shown in the figure). When the current exceeds the preset value, the fuse structure will be disconnected to achieve overcurrent protection for the circuit.

[0073] The fuse structure is a thin wire, sheet or strip structure made of a low melting point conductive material. Preferably, in this embodiment, the fuse material is a strip structure made of aluminum, and the middle position of the strip structure has a weak point. This design can ensure that when the current exceeds the preset value, the fuse structure can quickly disconnect the circuit at the weak point, thereby effectively protecting the circuit and its connected equipment.

[0074] In this embodiment, a vertically arranged cylindrical first positioning column 160 is further provided on the bracket body 100, a circular first fixing hole 153 is provided on the adjustment circuit board 150 for the first positioning column 160 to pass through, and the adjustment circuit board 150 is fixed to the bracket body 100 through the first positioning column 160. The matching design of the first positioning column 160 and the first fixing hole 153 ensures that the adjustment circuit board 150 can be quickly, firmly and accurately installed at its predetermined position, thereby ensuring the reliability of the electrical connection and the stability of the mechanical structure.

[0075] Preferably, in this embodiment, two groups of first fixing holes 153 are provided on each adjusting circuit board 150, and the number of first positioning posts 160 is equal to the number of first fixing holes 153 and corresponds to each other, wherein the diameter of the first fixing hole 153 is slightly larger than the diameter of the first positioning post 160, the length of the first positioning post 160 is larger than the depth of the first fixing hole 153, and the first positioning post 160 is riveted to the adjusting circuit board 150. This design further improves the reliability of the assembly of the adjusting circuit board 150.

[0076] In this embodiment, a groove 180 is provided on the side of the bracket body 100 away from the first conductive member 200 and the second conductive member 300. The size of the groove 180 is adapted to the size of the two battery modules 500, and the bracket body 100 can be clamped on the battery module 500 through the groove 180.

[0077] In this embodiment, the first conductive member 200 and / or the second conductive member 300 are rectangular, triangular or circular. Preferably, the first conductive member 200 and the second conductive member 300 are both rectangular and have four rounded corners. This design can provide a larger contact area, which helps to improve the current transmission efficiency, and through the rounded corner design, it can reduce stress concentration and improve mechanical strength.

[0078] In this embodiment, the first conductive member 200 and / or the second conductive member 300 are made of aluminum or copper. Preferably, the first conductive member 200 and the second conductive member 300 are made of aluminum. This design not only has a good conductive effect, but also meets welding requirements and realizes a lightweight design.

[0079] In this embodiment, multiple first conductive members 200 are introduced to connect the electrodes of two adjacent battery cells 510, so that multiple battery cells 510 in the same battery module 500 can be connected in series. This design enables current to flow from one battery cell 510 to another battery cell 510 in a single battery module 500, thereby increasing the voltage output of the entire module, which is suitable for application scenarios requiring higher voltage.

[0080] In this embodiment, by introducing the second conductive member 300 and connecting it to the electrodes of two adjacent battery cells 510 of two adjacent battery modules 500, the two battery modules 500 can be connected in series. This design enables multiple battery modules 500 to output higher voltage and current as a whole, further expanding the total capacity and output capacity of the system, and meeting application scenarios with greater power requirements.

[0081] In this embodiment, the first conductive member 200 and / or the second conductive member 300 are provided with a first positioning hole 210 and a second positioning hole 220 which are circular and penetrate through the first conductive member 200 and / or the second conductive member 300, and the first positioning hole 210 and the second positioning hole 220 correspond one-to-one to at least two electrode welding positions of the battery module 500. This design can realize the rapid determination of the welding point, ensure the welding accuracy, and improve the reliability and production efficiency of the entire system.

[0082] Preferably, in this embodiment, laser welding technology is used to connect the first conductive member 200 and the second conductive member 300 to the electrodes of the battery module 500. This welding method can not only achieve efficient and accurate connection, but also ensure the quality and reliability of the welding point.

[0083] Since the battery module 500 generates heat during use, when its heat is transferred to the first conductive member 200 and the second conductive member 300, the first conductive member 200 and the second conductive member 300 will expand along the length direction due to the heat. Therefore, in this embodiment, the first conductive member 200 and / or the second conductive member 300 is provided with an adjustment portion 230, which is located between the first positioning hole 210 and the second positioning hole 220, is in an arc shape, and protrudes in a direction perpendicular to the first conductive member 200 or the second conductive member 300. This design can provide expansion margin when the first conductive member 200 and the second conductive member 300 expand due to heat, prevent deformation or damage caused by thermal expansion, and effectively improve the service life of the CCS component.

[0084] like Figures 1 to 9 As shown, an embodiment of the present invention further provides a battery pack, including:

[0085] The battery module 500 is provided with at least two groups;

[0086] The CCS assembly includes a support body 100, a first conductive member 200 and a second conductive member 300;

[0087] The bracket body 100 is provided with a first accommodating area and a second accommodating area;

[0088] The first conductive member 200 is disposed in the first accommodation area, and the first conductive member 200 is welded to the electrode of the battery module 500, so that multiple battery cells 510 in a single battery module 500 can form a series circuit;

[0089] The second conductive member 300 is disposed in the second accommodation area, and two ends of the second conductive member 300 can be welded to electrodes of two battery modules 500 respectively, so that the two battery modules 500 form a series circuit;

[0090] The housing 600 includes a bottom plate 610 having a receiving groove 611. When the battery module 500 and the CCS assembly are located in the receiving groove 611, there is a welding space between the receiving groove 611 and the CCS assembly. This design simplifies the structure of the CCS assembly and reduces the production cost. On the other hand, through the design of the welding space, sufficient welding space is provided, so that multiple battery modules 500 and CCS assemblies can be welded in series on the bottom plate 610 at one time, which significantly improves the production efficiency.

[0091] In the design of the conventional housing 600, the side wall of the bottom plate 610 is usually high to ensure the rigidity and anti-deformation ability of the housing 600. However, this design makes it impossible for the welding tool to approach the welding point from multiple angles, resulting in difficulty in welding operation and affecting welding quality and efficiency. Therefore, in this embodiment, a housing 600 composed of a bottom plate 610 and a shell cover 620 is introduced, so that the bottom plate 610 has a receiving groove 611 that can accommodate the CCS assembly and multiple battery modules 500, and the receiving groove 611 includes a rectangular side wall extending along the stacking direction of the battery module 500 and the CCS assembly, and the extension length of the side wall is less than the straight-line distance from the bottom of the bracket body 100 to the receiving groove 611. Since the side wall of the receiving groove 611 is lower than the bracket body 100, an open welding space is formed, which allows the welding tool to approach the welding point from multiple angles, ensures the smooth progress of the welding process, and effectively improves the welding quality and efficiency.

[0092] In this embodiment, the side wall of the receiving groove 611 is detachably connected to the side of the shell cover 620 by fasteners, preferably, the fasteners include screws and nuts. This design ensures the reliability of the connection between the bottom plate 610 and the shell cover 620, and realizes the protection of internal components such as the battery module 500, the CCS component and the main circuit board 800.

[0093] In this embodiment, a handle 900 is provided on the shell cover 620 as a fulcrum for lifting the battery pack. In order to avoid interference between the connection points between the bottom plate 610 and the shell cover 620 arranged in a line along the length direction and the handle 900. The extension length of the side wall of the accommodating groove 611 is less than the straight-line distance from the bottom of the handle 900 to the accommodating groove 611, that is, the height of the side wall of the accommodating groove 611 is lower than the height of the bottom edge of the handle 900. This design makes the connection point between the bottom plate 610 and the shell cover 620 below the handle 900. On the one hand, it ensures that the handle 900 can support lifting and carrying the battery pack without being affected by the connection point; on the other hand, it also ensures the aesthetics of the overall structure.

[0094] In this embodiment, the shell cover 620 includes a top cover 621 and a front cover 622, wherein the top cover 621 is a hollow rectangular frame with openings on both sides, and the front cover 622 is rectangular; when the top cover 621 and the front cover 622 are covered on the bottom plate 610, the front cover 622 can close one of the openings of the top cover 621, and the bottom plate 610 can close the other opening, and the three cooperate to form a receiving cavity for accommodating the battery module 500 and the CCS assembly. This split design improves the convenience of internal structure assembly.

[0095] like Fig. 9 As shown, since the height of the side wall of the bottom plate 610 is reduced, in this embodiment, the side wall of the top cover 621 extends vertically toward the bottom cover. This causes the horizontal surface of the top cover 621 to deform when the shell 600 is lifted, that is, the horizontal surface of the top cover 621 will bulge upward or sag downward. Therefore, a reinforcing rib 623 is provided on the side of the top cover 621 opposite to the bracket body 100; when the shell 600 is lifted by the handle 900, the reinforcing rib 623 can suppress the deformation of the top cover 621 when it is subjected to force. This design significantly enhances the structural strength of the top cover 621, prevents deformation during the lifting process, ensures the stability of the horizontal surface of the top cover 621, effectively improves the reliability and durability of the entire battery pack, and extends the service life.

[0096] In this embodiment, a plurality of reinforcing ribs 623 are provided, which significantly enhance the structural strength of the top cover 621 and the deformation resistance of the overall structure, and at least one reinforcing rib 623 is arranged in a direction perpendicular to the pulling direction, which ensures that the deformation of the top cover 621 can be effectively suppressed during the pulling process, thereby improving the reliability and durability of the entire battery pack.

[0097] It is worth noting that the reinforcing ribs 623 can also be arranged in a staggered manner horizontally and vertically to provide multi-directional support for the top cover 621, ensuring that it can remain stable and not deformed under different stress conditions.

[0098] Preferably, in this embodiment, five reinforcing ribs 623 are provided, which are arranged equidistantly along the length direction of the top cover 621. This design ensures the uniformity of the supporting force distribution and also improves the aesthetics of the top cover 621.

[0099] In this embodiment, the reinforcing rib 623 can be an arcuate strip, a rectangle, a triangle or other suitable geometric shapes, depending on the actual application requirements, and the height and width of the reinforcing rib 623 are designed according to the thickness of the top cover 621 and the expected stress conditions.

[0100] In this embodiment, the top cover 621 and the bottom plate 610 are detachably connected by fasteners, and the front cover 622 is plugged into the top cover 621 and the bottom plate 610 respectively, which is used to realize the pre-fixation of the front cover 622 during assembly, so that the front cover 622 can be quickly positioned and fixed during the assembly process, reducing the assembly time and complexity. In addition, the plug-in fit provides multi-point support, enhances the structural strength of the entire battery pack, and prevents deformation or damage during transportation or use.

[0101] In this embodiment, the front cover 622 is a plastic part, and the bottom plate 610 and the top cover 621 are sheet metal parts. This design not only ensures the strength of the battery pack housing 600, but also realizes a lightweight design and reduces production costs.

[0102] In order to ensure the connection strength between the front cover 622 and the bottom plate 610, in this embodiment, a vertically connected reinforcing sheet 700 is provided on the front cover 622, and the reinforcing sheet 700 is detachably connected to the bottom plate 610, the front cover 622, and the top cover 621 through fasteners. The introduction of the reinforcing sheet 700 not only significantly enhances the connection strength between the front cover 622 and the bottom plate 610, preventing loosening or separation during transportation or use, but also makes the connection force point between the front cover 622 and the bottom plate 610 concentrated on the reinforcing sheet 700, rather than directly acting on the front cover 622, thereby reducing the strength requirements of the front cover 622, reducing the production cost, and achieving the dual goals of design optimization and cost control.

[0103] In this embodiment, the handle 900 is detachably fixed to the end of the reinforcing sheet 700 near the front cover 622 by fasteners. When the user pulls the battery pack by the handle 900, the reinforcing sheet 700, as the main carrier, transmits the pulling load to the top cover 621 and the bottom cover. Since the reinforcing sheet 700 is vertically connected to the front cover 622, the force direction of the pulling load is perpendicular to the front cover 622, so that the pulling load does not act on the front cover 622. This design optimizes the transmission path of the pulling load, avoids the pulling load directly acting on the front cover 622, reduces the force burden of the front cover 622, and thus extends the service life of the front cover 622.

[0104] An embodiment of the present invention further provides a battery pack assembly process for efficiently and reliably assembling the above-mentioned battery pack. The assembly process simplifies the assembly process and improves production efficiency by optimizing steps and structural design.

[0105] In this embodiment, the assembly process includes the following steps:

[0106] S1, placing at least two battery modules 500 side by side on the bottom plate 610, ensuring accurate positioning of the battery modules 500 on the bottom plate 610, and preparing for subsequent welding operations;

[0107] S2. The CCS assembly is placed on two battery modules 500, and the first conductive member 200 and the second conductive member 300 are aligned with the electrodes on the battery module 500, respectively, so as to facilitate subsequent welding operations;

[0108] S3, the first conductive member 200 and the second conductive member 300 are sequentially laser welded to the corresponding electrodes on the battery module 500 to achieve the series connection of multiple battery cells 510 in the same battery module 500, and the series connection of at least two groups of battery modules 500;

[0109] S4, plug the front cover 622 onto the bottom plate 610 to pre-fix the front cover 622, and make the reinforcing sheet 700 fit the side wall of the bottom plate 610 to position the reinforcing sheet 700;

[0110] S5. Close the top cover 621 on the bottom plate 610 in the horizontal direction and plug it into the front cover 622 so that the side wall of the top cover 621 fits with the side wall of the bottom plate 610. Then connect the reinforcing sheet 700, the side wall of the top cover 621 and the side wall of the bottom plate 610 with fasteners to ensure the structural stability of the entire battery pack.

[0111] Compared with the existing assembly process, the need for additional assembly connectors 152 is reduced, the assembly process is simplified, and the production cost is reduced. At the same time, through reasonable layout and design, the welding operation of multiple battery modules 500 can be completed in the same welding process, which significantly improves the production efficiency.

Claims

1. A CCS assembly for connecting at least two battery modules, wherein: The two groups of battery modules are arranged side by side, and the sides of the two groups with electrodes together form a support surface, characterized in that the CCS assembly includes: A bracket body, wherein a first accommodating area and a second accommodating area are provided on the bracket body and are located in the same horizontal plane, and projections of the first accommodating area and the second accommodating area in a direction perpendicular to the supporting surface are located within the supporting surface; A first conductive member, wherein the first conductive member is disposed in the first accommodating area, and the first conductive member is welded to the electrode of the battery module so that a plurality of cells in a single battery module can form a series circuit; The second conductive member is disposed in the second accommodating area, and two ends of the second conductive member can be respectively welded to electrodes of the two groups of battery modules, so that the two groups of battery modules form a series circuit.

2. A CCS assembly according to claim 1, characterized in that: The first accommodating area is provided with a plurality of first positioning grooves, the second accommodating area is provided with a second positioning groove, and the size of the first positioning groove is adapted to the size of the first conductive member, and the size of the second positioning groove is adapted to the size of the second conductive member.

3. A CCS assembly according to claim 2, characterized in that: Each group of the battery modules includes a plurality of battery cells arranged side by side, each of the first positioning grooves is located above the electrodes of two adjacent battery cells in the same battery cell module, and the second positioning groove is located above the electrodes of two adjacent battery cells between two battery cell modules.

4. A CCS assembly according to claim 2, characterized in that: The bracket body is provided with a mainstream channel and multiple diversion channels, the mainstream channel extends in a direction perpendicular to the second positioning groove, the multiple second positioning grooves extend in a direction perpendicular to the first positioning groove respectively, and are connected to the mainstream channel, and the height of the mainstream channel and the diversion channel is lower than or parallel to the height of the first positioning groove and the second positioning groove.

5. A CCS assembly according to claim 4, characterized in that: There are multiple first conductive members, and the CCS assembly also includes multiple wires corresponding to the number of the first conductive members and the second conductive members, and one end of the wire is connected to the first conductive member or the second conductive member, and the other end is connected to the main circuit board along the diversion channel and the main flow channel.

6. A CCS assembly according to claim 5, characterized in that: The bracket body is also provided with a plurality of adjustment circuit boards corresponding to the number of the first conductive parts and the second conductive parts, and the wire is connected to the first conductive part or the second conductive part through the adjustment circuit board; when the current exceeds a preset value, the adjustment circuit board can disconnect the electrical connection between the wire and the first conductive part or the second conductive part.

7. A CCS assembly according to claim 6, characterized in that: The regulating circuit board is provided with at least one fixing part and a connecting member, the electric wire is connected to the fixing part, the connecting member is connected to the first conductive member or the second conductive member, and the fixing part and the connecting member are connected via a fuse structure.

8. A CCS assembly according to claim 6, characterized in that: The bracket body is also provided with a first positioning column, the adjustment circuit board is provided with a first fixing hole for the first positioning column to pass through, and the adjustment circuit board is fixed to the bracket body through the first positioning column.

9. A CCS assembly according to claim 2, characterized in that: A second positioning column is provided in the first positioning groove and the second positioning groove respectively, and the first conductive member and the second conductive member have a second fixing hole for the second positioning column to pass through, and the first conductive member and the second conductive member are fixed in the first positioning groove or the second positioning groove through the second positioning column.

10. A CCS assembly according to claim 1, characterized in that: The first conductive member and / or the second conductive member are rectangular and made of aluminum; a first positioning hole and a second positioning hole are provided on the first conductive member and / or the second conductive member, and the first positioning hole and the second positioning hole correspond one-to-one to at least two electrode welding positions of the battery module.

11. A CCS assembly according to claim 10, characterized in that: An adjusting portion is provided on the first conductive member and / or the second conductive member. The adjusting portion is located between the first positioning hole and the second positioning hole and protrudes in a direction perpendicular to the first conductive member and / or the second conductive member.

12. A battery pack, characterized in that: include: A battery module, wherein the battery module is provided with at least two groups; A CCS assembly, the CCS assembly comprising a bracket body, a first conductive member and a second conductive member; The bracket body is provided with a first accommodating area and a second accommodating area; The first conductive member is disposed in the first accommodating area, and the first conductive member is welded to the electrode of the battery module, so that a plurality of cells in a single battery module can form a series circuit; The second conductive member is disposed in the second accommodating area, and two ends of the second conductive member can be respectively welded to electrodes of the two groups of battery modules, so that the two groups of battery modules form a series circuit; The shell comprises a bottom plate having a receiving groove; when the battery module and the CCS component are located in the receiving groove, a welding space is provided between the receiving groove and the CCS component.

13. A battery pack according to claim 12, characterized in that: The accommodating groove includes a side wall extending along the stacking direction of the battery module and the CCS assembly, and the extending length of the side wall is less than the straight-line distance from the bottom of the bracket body to the accommodating groove.

14. A battery pack according to claim 12, characterized in that: The shell body also includes a shell cover detachably connected to the base plate, and the shell cover is provided with a handle, the accommodating groove includes a side wall extending along the stacking direction of the battery module and the CCS assembly, and the extension length of the side wall is less than the straight-line distance from the bottom of the handle to the accommodating groove.

15. A battery pack according to claim 14, characterized in that: The shell cover includes a top cover and a front cover, the top cover is detachably connected to the bottom plate, the front cover is plug-fitted with the top cover and the bottom plate respectively, and a reinforcing sheet detachably connected to the bottom plate is provided on the front cover.

16. A battery pack according to claim 15, characterized in that: A reinforcing rib is provided on one side of the top cover opposite to the bracket body; when the shell is lifted by the handle, the reinforcing rib can suppress the deformation of the top cover when it is subjected to force.

17. A battery pack according to claim 16, characterized in that: There are multiple reinforcing ribs, and the setting direction of at least one of the reinforcing ribs is perpendicular to the pulling direction.

18. A battery pack assembly process for assembling a battery pack according to any one of claims 15 to 17, characterized in that: The steps include: Placing at least two of the battery modules side by side on the bottom plate; Placing the CCS assembly on the two battery modules, and aligning the first conductive member and the second conductive member with the electrodes on the battery modules respectively; Welding the first conductive member and the second conductive member to corresponding electrodes on the battery module in sequence; Insert the front cover onto the bottom plate, and make the reinforcing sheet fit the side wall of the bottom plate; The top cover is placed on the bottom plate and plugged with the front cover so that the side wall of the top cover fits with the side wall of the bottom plate, and then the reinforcing sheet, the side wall of the top cover and the side wall of the bottom plate are connected by fasteners.

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