CCS assembly and battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses a CCS assembly and a battery pack, the CCS assembly is used for realizing the connection of at least two groups of battery modules, the two groups of battery modules are arranged side by side, one sides of the two groups of battery modules with electrodes jointly form a supporting surface, the CCS assembly comprises a bracket 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 utility model has the advantages of high assembly efficiency and low production cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially, relates to a CCS assembly and battery package. BACKGROUND

[0002] In the design of traditional large capacity battery package, usually adopt the structure of multiple battery module parallel connection or series connection to improve energy output. Each battery module needs to independently configure a CCS (Cell Contact System) assembly for realizing the collection, monitoring and electrical connection of battery cell. In order to realize the miniaturization design of battery package, the internal space of battery package shell is usually small, can only place battery module, cannot allow welding operation. Therefore, the existing battery module is placed into the shell of battery package after being welded with CCS assembly. This makes battery package need to additionally configure copper bar respectively and detachably connected with two CCS assemblies to realize the series connection of two battery modules. This not only increases the complexity of assembly process of battery package, reduces assembly efficiency, but also increases production cost. SUMMARY

[0003] In view of the above-mentioned deficiencies existing in the prior art, the technical problem to be solved by the utility model is to provide a CCS assembly and battery package with high assembly efficiency and low production cost.

[0004] The utility model solves its technical problem and adopts the technical scheme that a CCS assembly is provided for realizing the connection of at least two groups of battery modules, wherein the two groups of battery modules are arranged side by side, and the side with electrodes of the two groups of battery modules jointly constitutes a support surface, and the CCS assembly comprises:

[0005] A support body is provided with a first containing area and a second containing area in the same horizontal plane, and the projection of the first containing area and the second containing area in the direction perpendicular to the support surface is in the support surface;

[0006] A first conductive part is arranged in the first containing area, and the first conductive part is welded with the electrode of the battery module to form a series circuit of multiple battery cells in a single battery module;

[0007] A second conductive part is arranged in the second containing area, and the two ends of the second conductive part can be welded with the electrodes of the two groups of battery modules respectively, and the two groups of battery modules form a series circuit.

[0008] Further, a plurality of first positioning grooves are arranged in the first containing area, a second positioning groove is arranged in the second containing area, and the size of the first positioning groove is matched with the size of the first conductive part, and the size of the second positioning groove is matched with the size of the second conductive part.

[0009] Further, each of the battery modules comprises a plurality of battery cells arranged side by side, each of the first positioning slots is located above the electrodes of two adjacent battery cells in the same battery module, and each of the second positioning slots is located above the electrodes of two adjacent battery cells between the two battery modules.

[0010] Further, the support body is provided with a main flow channel and a plurality of branch flow channels, the main flow channel extends along a direction perpendicular to the second positioning slots, the second positioning slots extend along a direction perpendicular to the first positioning slots respectively, and the main flow channel and the branch flow channels are in communication with the main flow channel and the branch flow channels, and the height of the main flow channel and the branch flow channels is lower than or parallel to the height of the first positioning slots and the second positioning slots.

[0011] Further, the first conductive members are provided in plurality, the CCS assembly further comprises a plurality of electric wires corresponding to the first conductive members and the second conductive members one by one, one end of each of the electric wires is connected to the first conductive member or the second conductive member, and the other end of each of the electric wires is connected to the main circuit board along the branch flow channels and the main flow channel.

[0012] Further, the support body is further provided with a plurality of adjusting circuit boards corresponding to the first conductive members and the second conductive members one by one, and the electric wires are connected to the first conductive members or the second conductive members through the adjusting circuit boards; when the current exceeds a preset value, the adjusting circuit boards can disconnect the electrical connection between the electric wires and the first conductive members or the second conductive members.

[0013] Further, the adjusting circuit boards are provided with at least one fixing part and a connecting member, the electric wires are connected to the fixing part, the connecting member is connected to the first conductive members or the second conductive members, and the fixing part and the connecting member are connected through a fuse structure.

[0014] Further, the support body is further provided with a first positioning column, the adjusting circuit boards are provided with a first fixing hole through which the first positioning column passes, and the adjusting circuit boards are fixed to the support body through the first positioning column.

[0015] Further, the first positioning slots and the second positioning slots are respectively provided with a second positioning column, the first conductive members and the second conductive members have a second fixing hole through which the second positioning column passes, and the first conductive members and the second conductive members are fixed in the first positioning slots or the second positioning slots through the second positioning column.

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

[0017] Further, the first conductive piece and / or the second conductive piece is provided with an adjusting part between the first positioning hole and the second positioning hole, and the adjusting part protrudes towards a direction perpendicular to the first conductive piece and / or the second conductive piece.

[0018] The utility model solves its technical problem adopts the technical scheme still provides a kind of battery pack, including:

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

[0020] CCS component, the CCS component includes support body, first conductive piece and second conductive piece;

[0021] The support body is provided with first containing area and second containing area;

[0022] The first conductive piece is arranged in the first containing area, and the electrode of the battery module is welded by the first conductive piece, so that multiple battery cells in a single battery module form a series circuit;

[0023] The second conductive piece is arranged in the second containing area, and the electrode of two groups of battery modules can be welded at both ends of the second conductive piece, and two groups of battery modules form a series circuit;

[0024] Shell, the shell includes bottom plate, and the bottom plate has a containing groove;When the battery module and the CCS component are located in the containing groove, the containing groove and the CCS component have welding space.

[0025] Further, the containing groove includes a side wall extending along the stacking direction of the battery module and the CCS component, and the extension length of the side wall is less than the straight line distance from the bottom of the support body to the containing groove.

[0026] Further, the shell further includes a shell cover detachably connected with the bottom plate, and the shell cover is provided with a handle, the containing groove includes a side wall extending along the stacking direction of the battery module and the CCS component, and the extension length of the side wall is less than the straight line distance from the bottom of the handle to the containing groove.

[0027] Further, the shell cover comprises a top cover and a front cover, the top cover is detachably connected with the bottom plate, the front cover is in plug-in fit with the top cover and the bottom plate respectively, and the front cover is provided with a reinforcing sheet detachably connected with the bottom plate.

[0028] Further, the top cover is provided with a reinforcing rib on the side opposite to the bracket body; when the shell is pulled by the handle, the reinforcing rib can inhibit the deformation of the top cover under stress.

[0029] Further, the reinforcing rib is provided with a plurality of reinforcing ribs, and at least one of the reinforcing ribs is arranged in a direction perpendicular to the pulling direction.

[0030] Compared with the prior art, the utility model has at least the following beneficial effects:

[0031] 1、 in the utility model, the first accommodating area and the second accommodating area are arranged on the bracket body, the first conductive part is arranged in the first accommodating area, and the second conductive part is arranged in the second accommodating area, the electrode of the battery module is welded to the first conductive part, a plurality of battery cells in a single battery module form a series circuit, the electrode of the battery module is welded to the second conductive part at both ends, and two groups of battery modules form a series circuit. The integrated design integrates the bracket body, the first conductive part and the second conductive part into one, which not only saves the need for additional external copper bars and related fastening structures, effectively reduces production cost, but also supports welding and series connection of multiple battery modules and CCS modules at one time, and significantly improves assembly efficiency.

[0032] 2、 in the utility model, the main flow channel and the plurality of branch flow channels are arranged on the bracket body and are in communication with each other, and the height of the main flow channel and the branch flow channels is lower than or parallel to the height of the first positioning groove and the second positioning groove, so that orderly arrangement of the plurality of wires is realized, and interference of the wire harness formed by the plurality of wires with welding of the first conductive part and the second conductive part is avoided, welding convenience of the first conductive part and the second conductive part is effectively improved, and process reliability is ensured.

[0033] 3、 in the utility model, the plurality of wires are arranged in the main flow channel and the branch flow channel, and the main circuit board is connected with the first conductive part and the second conductive part through the wires, that is, the wire harness is used to replace the original flexible circuit board, which not only significantly reduces production cost while ensuring effective circuit connection, but also reduces occupation of the internal space of the battery pack through cooperation with the main flow channel and the branch flow channel, and improves welding convenience of the first conductive part and the second conductive part. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is a structural schematic view of the CCS assembly in the utility model.

[0035] Figure 2 It is an exploded view of the CCS assembly in the utility model.

[0036] Figure 3 It is a structure schematic view of the CCS assembly assembled on the battery module in the utility model.

[0037] Figure 4 It is a structure schematic view of the bracket body in the utility model.

[0038] Figure 5 It is a structure schematic view of a battery pack in the utility model.

[0039] Figure 6 It is an exploded view of a battery pack in the utility model.

[0040] Figure 7 It is a sectional view of a battery pack in the utility model.

[0041] Figure 8 It is Figure 7 The enlarged view of A in the utility model.

[0042] Figure 9 It is a top cover deformation direction schematic view in the utility model.

[0043] In all the drawings, same reference signs represent same technical features, specifically: 100, bracket body; 110, first positioning groove; 120, second positioning groove; 130, main flow channel; 140, branch flow channel; 150, adjusting circuit board; 151, fixed part; 152, connecting piece; 153, first fixed hole; 160, first positioning column; 170, second positioning column; 180, recess; 200, first conductive piece; 210, first positioning hole; 220, second positioning hole; 230, adjusting part; 240, second fixed hole; 300, second conductive piece; 400, electric wire; 500, battery module; 510, electric core; 600, shell; 610, bottom plate; 611, containing groove; 620, shell cover; 621, top cover; 622, front cover; 623, reinforcing rib; 700, reinforcing sheet; 800, main circuit board; 900, handle. DETAILED DESCRIPTION

[0044] The following is a specific embodiment of the utility model and further describes the technical scheme of the utility model in combination with the drawings, but the utility model is not limited to these embodiments.

[0045] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0046] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0047] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0048] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0049] like Figures 1 to 4 As shown, this 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 support surface. The CCS assembly includes:

[0050] The support body 100 has a first accommodating area and a second accommodating area on the same horizontal plane, and the projections of the first accommodating area and the second accommodating area in the direction perpendicular to the support surface are within the support surface.

[0051] The first conductive element 200 is disposed in the first accommodating area. By welding the first conductive element 200 to the electrodes of the battery module 500, multiple cells 510 in a single battery module 500 can form a series circuit.

[0052] The second conductive element 300 is disposed in the second accommodating area, and its two ends can be welded to the electrodes of the two battery modules 500 respectively, forming a series circuit between the two battery modules 500. This design integrates the bracket body 100, the first conductive element 200, and the second conductive element 300 into one unit, achieving integrated design. This not only eliminates the need for additional external copper busbars and related fastening structures, effectively reducing production costs, but also supports the simultaneous welding and series connection of multiple battery modules 500 with CCS components, significantly improving assembly efficiency.

[0053] Specifically, such as Figures 1 to 4 As shown, in this embodiment, the CCS component is mainly used to realize the series connection of the cells 510 inside the battery module 500 and the series connection between at least two sets of battery modules 500. The two sets of battery modules 500 are arranged side by side, and each battery module 500 includes multiple cells 510 arranged in a line. Each cell 510 is provided with an electrode, and the side of the two sets of battery modules 500 with electrodes together form a rectangular support surface to support the CCS component.

[0054] In this embodiment, the CCS assembly includes a rectangular support body 100 made of insulating material, preferably a plastic component. This design not only achieves a lightweight design for the CCS assembly but also ensures the safety of the battery module 500 while reducing production costs.

[0055] In this embodiment, the bracket body 100 is provided with a first accommodating area and a second accommodating area on the same horizontal plane for mounting the first conductive element 200 and the second conductive element 300. The projections of the first and second accommodating areas in a direction perpendicular to the support surface are within the support surface. This design integrates the mounting positions of the first conductive element 200 and the second conductive element 300 onto the bracket body 100, ensuring that the first conductive element 200 and the second conductive element 300 are connected to the battery module 500 within the support surface. Compared with the external copper busbar in the prior art, this not only saves on the arrangement of copper busbars and their related connection structures but also reduces the occupation of horizontal space inside the battery pack.

[0056] In the present embodiment, the first accommodating region is in the shape of a concave character, and the second accommodating region is in the shape of a rectangle, which is located in the concave gap of the first accommodating region and can form a rectangular region matching the size of the support surface. It is worth noting that the second accommodating region can be located at the side of the concave gap close to or away from the main circuit board 800 or at the middle position, which can be arranged between the two adjacent groups of battery modules 500. Preferably, the second accommodating region is located at the side of the first accommodating region away from the main circuit board 800. This design can simplify the complexity of the electrical circuit layout and improve the convenience of welding.

[0057] In the present embodiment, a plurality of first positioning grooves 110 are arranged in the first accommodating region, and a second positioning groove 120 is arranged in the second accommodating region. The size of the first positioning groove 110 matches the size of the first conductive part 200, and the size of the second positioning groove 120 matches the size of the second conductive part 300. This design realizes the positioning of the assembly of the first conductive part 200 and the second conductive part 300, improves the assembly precision of the first conductive part 200 and the second conductive part 300, and also forms a pre-fixing of the first conductive part 200 and the second conductive part 300.

[0058] Preferably, in the present embodiment, the first positioning groove 110 and the second positioning groove 120 are both in the shape of a rectangle. Each first positioning groove 110 is arranged horizontally along the arrangement direction of the adjacent two battery cells 510 of the same battery module 500, and each first positioning groove 110 is located directly above the electrodes of the adjacent two battery cells 510 of the same battery module 500. The second positioning groove 120 is arranged horizontally along the arrangement direction of the adjacent two groups of battery modules 500 and is located directly above the electrodes of the adjacent two battery cells 510 between the two battery modules 500. This design enables the first conductive part 200 and the second conductive part 300 to accurately correspond to the corresponding battery cells 510, ensuring the welding precision of the first conductive part 200 and the second conductive part 300.

[0059] In the present embodiment, a cylindrical second positioning column 170 is arranged in each of the first positioning groove 110 and the second positioning groove 120. A circular second fixing hole 240 is arranged on the first conductive part 200 and the second conductive part 300 for the second positioning column 170 to pass through, and the first conductive part 200 and the second conductive part 300 are fixed in the first positioning groove 110 or the second positioning groove 120 through the second positioning column 170. Through the cooperation of the second positioning column 170 and the second fixing hole 240, the first conductive part 200 and the second conductive part 300 are quickly, stably and accurately installed. This design not only improves the reliability of electrical connection, but also enhances the stability of the mechanical structure, which is suitable for application scenarios requiring high precision and high stability.

[0060] Preferably, in the embodiment, two groups of second fixing holes 240 are arranged on each of the first and second conductive members 200 and 300, the number of the second positioning columns 170 is equal to that of the second fixing holes 240, and the second positioning columns 170 and the second fixing holes 240 are one-to-one corresponding, wherein the diameter of the second fixing holes 240 is slightly larger than that of the second positioning columns 170, the length of the second positioning columns 170 is greater than the depth of the second fixing holes 240, and the second positioning columns 170 are riveted with the first and second conductive members 200 and 300. The design further improves the firmness of the assembly of the first and second conductive members 200 and 300.

[0061] In the conventional CCS design, a flexible circuit board is usually used to realize the connection between the battery module 500 and 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 causes the production cost of the CCS assembly to surge, but also occupies the space on the bracket body 100.

[0062] In the embodiment, since the second conductive member 300 is integrated on the bracket body 100, the conventional flexible circuit board may interfere with the installation space of the second conductive member 300. Therefore, in the embodiment, a wire harness is used instead of the flexible circuit board, and a main flow channel 130 and a plurality of sub-flow channels 140 for arranging the wire harness are arranged on the bracket body 100; on the one hand, the interference with the installation space of the second conductive member 300 is avoided, and on the other hand, the structure is simplified, and the production cost is effectively reduced.

[0063] In the embodiment, one end of the main flow channel 130 is perpendicular to the main circuit board 800, the other end extends along the direction perpendicular to the second positioning groove 120, the plurality of second positioning grooves 120 respectively extend along the direction perpendicular to the first positioning groove 110 and are in vertical communication with the main flow channel 130, and the height of the main flow channel 130 and the sub-flow channels 140 is lower than or parallel to the height of the first and second positioning grooves 110 and 120. The design makes the wire harness not only bypass the first and second positioning grooves 110 and 120 to avoid interference with the installation space of the first and second conductive members 200 and 300, but also simplifies the overall structure of the bracket body 100.

[0064] In the embodiment, the wire harness includes a plurality of electric wires 400 corresponding to the first and second conductive members 200 and 300, one end of each electric wire 400 is connected to the first or second conductive member 200 or 300, and the other end is connected to the main circuit board 800 along the sub-flow channels 140 and the main flow channel 130, so that the battery module 500 can be electrically connected to the main circuit board 800.

[0065] In the embodiment, the support body 100 is further provided with a plurality of first conductive members 200 and second conductive members 300, and a plurality of adjusting circuit boards 150 corresponding to the first conductive members 200 and the second conductive members 300 in one-to-one correspondence. The electric wire 400 is connected to the first conductive member 200 or the second conductive member 300 through the adjusting circuit board 150. When the current exceeds the preset value, the adjusting circuit board 150 can disconnect the electric connection between the electric wire 400 and the first conductive member 200 or the second conductive member 300. By introducing the adjusting circuit board 150, overcurrent protection is formed for each battery cell 510, which avoids short circuit of the circuit due to excessive current, and effectively improves the safety of the system and the service life of the CCS assembly.

[0066] In the embodiment, the adjusting circuit board 150 is in the shape of a rectangular strip, and the four corners of the adjusting circuit board 150 are designed as rounded corners. Each adjusting circuit board 150 is provided with at least one fixing portion 151 and a connecting member 152. One end of the electric wire 400 away from the main circuit board 800 is connected to the fixing portion 151. One end of the connecting member 152 away from the adjusting circuit board 150 is connected to the first conductive member 200 or the second conductive member 300. 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, realizing overcurrent protection of the circuit.

[0067] The fuse structure is a filament, sheet or strip structure made of a low-melting-point conductive material. Preferably, in the embodiment, the fuse material is a strip structure made of aluminum material, 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.

[0068] In the embodiment, the support body 100 is further provided with vertically arranged cylindrical first positioning columns 160, and the adjusting circuit board 150 is provided with circular first fixing holes 153 through which the first positioning columns 160 pass. The adjusting circuit board 150 is fixed to the support body 100 through the first positioning columns 160. Through the cooperation of the first positioning columns 160 and the first fixing holes 153, it is ensured that the adjusting circuit board 150 can be quickly, stably and accurately installed at its predetermined position, thereby ensuring the reliability of electrical connection and the stability of mechanical structure.

[0069] Preferably, in the embodiment, each adjusting circuit board 150 is provided with two groups of first fixing holes 153. The number of the first positioning columns 160 is equal to the number of the first fixing holes 153, and they are in one-to-one correspondence. The diameter of the first fixing hole 153 is slightly larger than the diameter of the first positioning column 160. The length of the first positioning column 160 is greater than the depth of the first fixing hole 153, and the first positioning column 160 is riveted to the adjusting circuit board 150. This design further improves the firmness of the adjusting circuit board 150 assembly.

[0070] In the present embodiment, the bracket body 100 is provided with a groove 180 on the side 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 groups of battery modules 500, and the bracket body 100 can be clamped on the battery modules 500 through the groove 180.

[0071] In the present embodiment, the first conductive member 200 and / or the second conductive member 300 is in the shape of a rectangle, a triangle or a circle, preferably, both the first conductive member 200 and the second conductive member 300 are in the shape of a rectangle with four rounded corners. This design can provide a larger contact area, which helps to improve the current transmission efficiency, and through the design of rounded corners, stress concentration can be reduced and mechanical strength can be improved.

[0072] In the present embodiment, the first conductive member 200 and / or the second conductive member 300 is made of aluminum or copper material. Preferably, the first conductive member 200 and the second conductive member 300 are made of aluminum material. This design not only has good conductivity, but also meets the welding requirements, while realizing lightweight design.

[0073] In the present embodiment, by introducing a plurality of first conductive members 200, which are connected with the electrodes of the adjacent two battery cells 510, the series connection of the plurality of battery cells 510 in the same battery module 500 can be realized. This design enables the current to flow from one battery cell 510 to another battery cell 510 within a single battery module 500, thereby increasing the voltage output of the entire module, which can be applied to application scenarios requiring higher voltage.

[0074] In the present embodiment, by introducing a second conductive member 300 and connecting it with the electrodes of the adjacent two battery cells 510 of the adjacent two groups of battery modules 500, the series connection of the two groups of battery modules 500 can be realized. This design enables multiple battery modules 500 to output higher voltage and current as a whole, further expanding the total capacity and output capability of the system, which can meet the application scenarios requiring larger power.

[0075] In the present embodiment, the first conductive member 200 and / or the second conductive member 300 is provided with a first positioning hole 210 and a second positioning hole 220 in the shape of a circle and penetrating through itself, and the first positioning hole 210 and the second positioning hole 220 correspond one-to-one with the welding positions of at least two electrodes of the battery module 500. This design can realize quick determination of the welding points, ensure the accuracy of welding, and improve the reliability and production efficiency of the entire system.

[0076] Preferably, in the present embodiment, laser welding technology is used to connect the first conductive member 200 and the second conductive member 300 with the electrodes of the battery module 500. This welding method not only realizes efficient and accurate connection, but also ensures the quality and reliability of the welding points.

[0077] As the battery module 500 generates heat during use, when the 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 in the length direction due to heat. Therefore, in the embodiment, the first conductive member 200 and / or the second conductive member 300 is provided with an adjusting portion 230, which is between the first positioning hole 210 and the second positioning hole 220, in a circular arc shape, and protrudes towards the vertical direction of the first conductive member 200 or the second conductive member 300. This design can provide an expansion allowance 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 assembly.

[0078] As shown in Figures 1 to 9 the utility model embodiment further provides a battery pack, which comprises:

[0079] The battery module 500 is provided with at least two groups;

[0080] The CCS assembly comprises a support body 100, a first conductive member 200 and a second conductive member 300;

[0081] The support body 100 is provided with a first accommodating area and a second accommodating area;

[0082] The first conductive member 200 is arranged in the first accommodating area and is welded with the electrode of the battery module 500 through the first conductive member 200, so that a plurality of battery cells 510 in a single battery module 500 form a series circuit;

[0083] The second conductive member 300 is arranged in the second accommodating area, and the two ends of the second conductive member 300 can be welded with the electrodes of the two groups of battery modules 500 respectively, and the two groups of battery modules 500 form a series circuit;

[0084] The shell 600 comprises a bottom plate 610, and the bottom plate 610 has an accommodating groove 611; when the battery module 500 and the CCS assembly are located in the accommodating groove 611, the accommodating groove 611 and the CCS assembly have a welding space. This design simplifies the structure of the CCS assembly, reduces the production cost, and provides sufficient welding space through the design of the welding space, so that a plurality of battery modules 500 and the CCS assembly can be welded in series on the bottom plate 610 at one time, which significantly improves the production efficiency.

[0085] In the conventional housing 600 design, the sidewall of the bottom plate 610 is usually high to ensure the rigidity and deformation resistance of the housing 600. However, this design makes it difficult for the welding tool to access the welding point from multiple angles, resulting in difficult welding operation and affecting the welding quality and efficiency. Therefore, in the present embodiment, the housing 600 is introduced by combining the bottom plate 610 with the shell cover 620, so that the bottom plate 610 has a containing groove 611 capable of accommodating the CCS assembly and a plurality of battery modules 500, and the containing groove 611 has a rectangular sidewall extending along the stacking direction of the battery modules 500 and the CCS assembly, and the extension length of the sidewall is less than the straight line distance from the bottom of the bracket body 100 to the containing groove 611. Since the sidewall of the containing groove 611 is lower than the bracket body 100, an open welding space is formed, which allows the welding tool to access the welding point from multiple angles, ensures the smooth progress of the welding process, and effectively improves the welding quality and efficiency.

[0086] In the present embodiment, the sidewall of the containing groove 611 and the side edge of the shell cover 620 are detachably connected by fasteners, preferably screws and nuts. This design ensures the reliability of the connection between the bottom plate 610 and the shell cover 620, and protects the internal devices such as the battery modules 500, the CCS assembly, and the main circuit board 800.

[0087] In the present embodiment, the shell cover 620 is provided with a handle 900 as a fulcrum for lifting the battery pack. In order to avoid interference between the connection point of the bottom plate 610 and the shell cover 620 arranged in line along the length direction and the handle 900, the extension length of the sidewall of the containing groove 611 is less than the straight line distance from the bottom of the handle 900 to the containing groove 611, i.e. the height of the sidewall of the containing groove 611 is lower than the height of the bottom edge of the handle 900. This design makes the connection point of the bottom plate 610 and the shell cover 620 below the handle 900, which on the one hand ensures that the handle 900 can support lifting and carrying the battery pack without being affected by the connection point, and on the other hand ensures the overall structural aesthetics.

[0088] In the present 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 two openings, and the front cover 622 is rectangular. When the top cover 621 and the front cover 622 are combined 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, thereby forming a containing cavity for accommodating the battery modules 500 and the CCS assembly. This split design improves the convenience of assembling the internal structure.

[0089] As Figure 9As shown, due to the reduced height of the sidewall of the bottom plate 610, in the present embodiment, the sidewall of the top cover 621 extends vertically towards the bottom cover. This makes the horizontal surface of the top cover 621 deform, i.e. the horizontal surface of the top cover 621 bulges upwards or sinks downwards when the shell 600 is pulled. Therefore, the side of the top cover 621 opposite to the bracket body 100 is provided with reinforcing ribs 623; when the shell 600 is pulled by the handle 900, the reinforcing ribs 623 can inhibit the deformation of the top cover 621 when it is stressed. This design significantly enhances the structural strength of the top cover 621, prevents deformation during pulling, ensures the stability of the horizontal surface of the top cover 621, effectively improves the reliability and durability of the entire battery pack, and prolongs the service life.

[0090] In the present embodiment, the reinforcing ribs 623 are provided in multiple numbers, which significantly enhances the structural strength of the top cover 621 and the anti-deformation ability 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 inhibited during pulling, thereby improving the reliability and durability of the entire battery pack.

[0091] It is worth noting that the reinforcing ribs 623 can also be arranged in a horizontal and vertical staggered manner to provide the top cover 621 with support force in multiple directions, ensuring that it can remain stable and undeformed under different stress conditions.

[0092] Preferably, in the present embodiment, the reinforcing ribs 623 are provided in five numbers and arranged equidistantly along the length direction of the top cover 621. This design ensures the uniformity of the support force distribution, while also improving the aesthetics of the top cover 621.

[0093] In the present embodiment, the reinforcing ribs 623 can be arc-shaped strips, rectangles, triangles or other suitable geometric shapes, depending on the actual application requirements, and the height and width of the reinforcing ribs 623 are designed according to the thickness of the top cover 621 and the expected stress conditions.

[0094] In the present embodiment, the top cover 621 is detachably connected to the bottom plate 610 by fasteners, and the front cover 622 is insertedly fitted with the top cover 621 and the bottom plate 610, respectively, to achieve pre-fixing when the front cover 622 is assembled, so that the front cover 622 can be quickly positioned and fixed during assembly, reducing the assembly time and complexity. In addition, the multi-point support provided by the inserted fitting enhances the structural strength of the entire battery pack, preventing deformation or damage during handling or use.

[0095] In the present 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 shell 600, but also achieves lightweight design, while reducing production costs.

[0096] To ensure the connection strength of the front cover 622 and the bottom plate 610, in the embodiment, a reinforcing sheet 700 is vertically connected on the front cover 622, and the reinforcing sheet 700 is detachably connected with the bottom plate 610 and 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, prevents loosening or separation during handling or use, but also makes the connection stress 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 requirement of the front cover 622, reducing the production cost, achieving the dual goals of design optimization and cost control.

[0097] In the embodiment, the handle 900 is detachably fixed on the reinforcing sheet 700 close to one end of the front cover 622 through a fastener. When a user pulls the battery pack through the handle 900, the reinforcing sheet 700 acts as a main carrier to transmit the pulling load to the top cover 621 and the bottom cover. Since the reinforcing sheet 700 is vertically connected with 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 stress burden of the front cover 622, and thereby prolongs the service life of the front cover 622.

[0098] The utility model embodiment further provides a battery package assembly process for efficiently and reliably assembling the above battery pack. The assembly process simplifies the assembly process and improves the production efficiency through optimized steps and structural design.

[0099] In the embodiment, the assembly process includes the following steps:

[0100] S1, at least two battery modules 500 are placed side by side on the bottom plate 610 to ensure accurate positioning of the battery modules 500 on the bottom plate 610, and to prepare for subsequent welding operation;

[0101] S2, the CCS assembly is placed on the two battery modules 500, and the first conductive part 200 and the second conductive part 300 are respectively aligned with the electrodes on the battery modules 500, so as to perform subsequent welding operation;

[0102] S3, the first conductive part 200 and the second conductive part 300 are sequentially laser-welded with the corresponding electrodes on the battery modules 500, to realize 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;

[0103] S4, the front cover 622 is inserted into the bottom plate 610 to realize the pre-fixing of the front cover 622, and the reinforcing sheet 700 is attached to the side wall of the bottom plate 610 to realize the positioning of the reinforcing sheet 700;

[0104] S5, the top cover 621 is closed on the bottom plate 610 in the horizontal direction, and is inserted with the front cover 622, so that the side wall of the top cover 621 is fitted with the side wall of the bottom plate 610, and then the fastener is used to connect the reinforcing sheet 700, the side wall of the top cover 621 and the side wall of the bottom plate 610, so as to ensure the structural stability of the whole battery pack.

[0105] 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 is completed in the same welding process, which significantly improves the production efficiency.

Claims

1. A CCS component for connecting at least two battery modules, wherein, The two sets of battery modules are arranged side by side, and the sides of both having electrodes together form a support surface. The CCS assembly comprises: The support body has a first accommodating area and a second accommodating area on 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 located within the support surface. A first conductive element is disposed in the first accommodating area. By welding the first conductive element to the electrodes of the battery module, multiple cells in a single battery module can form a series circuit. The second conductive element is disposed in the second accommodating area, and both ends of the second conductive element can be welded to the electrodes of the two sets of battery modules respectively, so that the two sets of battery modules form a series circuit.

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

3. A CCS component according to claim 2, characterized in that, Each battery module includes multiple cells arranged side by side. Each first positioning slot is located above the electrodes of two adjacent cells in the same battery module, and the second positioning slot is located above the electrodes of two adjacent cells between two battery modules.

4. A CCS component according to claim 2, characterized in that, The support body is provided with a main channel and multiple branch channels. The main channel extends along the direction perpendicular to the second positioning groove. The multiple second positioning grooves extend along the direction perpendicular to the first positioning groove and are connected to the main channel. The height of the main channel and the branch channels is lower than or parallel to the height of the first positioning groove and the second positioning groove.

5. A CCS component according to claim 4, characterized in that, The first conductive element is provided in multiple ways. The CCS assembly also includes multiple wires that correspond one-to-one with the number of the first conductive element and the second conductive element. One end of each wire is connected to the first conductive element or the second conductive element, and the other end is connected to the main circuit board along the shunt channel and the main channel.

6. A CCS component according to claim 5, characterized in that, The bracket body is also provided with a plurality of adjustment circuit boards that correspond one-to-one with the number of the first conductive element and the second conductive element, and the wire is connected to the first conductive element or the second conductive element through the adjustment circuit board; when the current exceeds a preset value, the adjustment circuit board can disconnect the wire from the first conductive element or the second conductive element.

7. A CCS component according to claim 6, characterized in that, The adjustment circuit board is provided with at least one fixing part and a connector. The wire is connected to the fixing part, the connector is connected to the first conductive element or the second conductive element, and the fixing part and the connector are connected by a fusible structure.

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

9. A CCS component according to claim 2, characterized in that, The first positioning groove and the second positioning groove are respectively provided with second positioning posts. The first conductive element and the second conductive element have second fixing holes for the second positioning posts to pass through, and the first conductive element and the second conductive element are fixed in the first positioning groove or the second positioning groove by the second positioning posts.

10. A CCS component according to claim 1, characterized in that, The first conductive element and / or the second conductive element are rectangular and made of aluminum; the first conductive element and / or the second conductive element are 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 with the welding positions of at least two electrodes of the battery module.

11. A CCS component according to claim 10, characterized in that, The first conductive element and / or the second conductive element are provided with an adjustment part, which is located between the first positioning hole and the second positioning hole and protrudes in a direction perpendicular to the first conductive element and / or the second conductive element.

12. A battery pack, characterized in that, include: A battery module, wherein the battery module is provided with at least two sets; The CCS assembly includes a support body, a first conductive element, and a second conductive element. The support body is provided with a first accommodating area and a second accommodating area; The first conductive element is disposed in the first accommodating area. By welding the first conductive element to the electrode of the battery module, multiple cells in a single battery module can form a series circuit. The second conductive element is disposed in the second accommodating area, and both ends of the second conductive element can be welded to the electrodes of the two sets of battery modules respectively, so that the two sets of battery modules form a series circuit; The housing includes a base plate having a receiving groove; when the battery module and the CCS assembly are located within the receiving groove, there is a welding space between the receiving groove and the CCS assembly.

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

14. A battery pack according to claim 12, characterized in that, The housing also includes a cover detachably connected to the base plate, and the cover is provided with a handle. The receiving groove includes a sidewall extending along the stacking direction of the battery module and the CCS assembly, and the extension length of the sidewall is less than the straight-line distance from the bottom of the handle to the receiving 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 inserted into the top cover and the bottom plate respectively. The front cover is provided with a reinforcing piece that is detachably connected to the bottom plate.

16. A battery pack according to claim 15, characterized in that, The top cover is provided with a reinforcing rib on the side opposite to the support body; when the shell is lifted by the handle, the reinforcing rib can suppress the deformation of the top cover under force.

17. A battery pack according to claim 16, characterized in that, The reinforcing ribs are provided in multiple ways, and at least one of the reinforcing ribs is arranged in a direction perpendicular to the lifting direction.

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