High-integration battery pack

Abstract

The utility model relates to a high-integration battery pack, which comprises a plurality of modules, a plurality of high-voltage lines and a plurality of low-voltage lines, the plurality of modules are arranged in two rows side by side, the plurality of high-voltage lines are arranged between the two rows of modules, the plurality of low-voltage lines are divided into two groups, and the two groups of low-voltage lines are respectively arranged on the outer sides of the two rows of modules. According to the high-integration battery pack provided by the utility model, the trends of the high-voltage line and the low-voltage line are fully considered, the high-voltage line and the low-voltage line are completely isolated, the overall layout is regular and safe, and risks caused by disordered wiring are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, in particular to a highly integrated battery pack. Background Art

[0002] With the development of the new energy vehicle industry, the research on the technical route of power batteries as important core components has become increasingly important. However, the current battery packs on the market do not fully consider the routing of high-voltage and low-voltage harnesses inside the system, resulting in chaotic arrangements of high-voltage and low-voltage harnesses. There are high-voltage and low-voltage parallel wiring methods and water pipe and high-voltage / low-voltage cross-wiring methods, which pose safety hazards. Summary of the Utility Model

[0003] Based on this, in view of the technical problem that the current battery pack does not fully consider the routing of high-voltage and low-voltage harnesses inside the system, resulting in chaotic arrangements of high-voltage and low-voltage harnesses, there are high-voltage and low-voltage parallel wiring methods and water pipe and high-voltage / low-voltage cross-wiring methods, which pose safety hazards, the utility model provides a highly integrated battery pack.

[0004] A highly integrated battery pack provided by the utility model includes a plurality of modules, a plurality of high-voltage lines and a plurality of low-voltage lines. The plurality of modules are arranged side by side in two rows, the plurality of high-voltage lines are all arranged between the two rows of modules, and the plurality of low-voltage lines are divided into two groups and the two groups of low-voltage lines are respectively arranged outside the two rows of modules.

[0005] The highly integrated battery pack proposed by the utility model fully considers the routing of high-voltage and low-voltage lines, completely isolates the high-voltage lines and low-voltage lines, and has a regular and safe overall layout, avoiding the risks caused by chaotic wiring.

[0006] As a further improvement of the above solution of the utility model, it further includes a high-voltage plug, a BDU (Battery Distribution Unit) module and a BMS (Battery Management System) module; the BDU module and the BMS module are arranged at one end of the two rows of modules, and the high-voltage plug is arranged at the other end of the two rows of modules. The positive and negative poles of the high-voltage plug are respectively connected to the main positive output terminal and the main negative output terminal of the BDU module through high-voltage lines, and the positive and negative poles of each module are connected to the BDU module through high-voltage lines; the BMS module is connected to the plurality of modules through a plurality of low-voltage lines respectively.

[0007] As a further improvement of the above solution of the present utility model, it further includes a box body, in which a first assembly area and a second assembly area are provided. The area of the first assembly area is larger than that of the second assembly area, and the second assembly area is located at one end of the first assembly area. A plurality of modules are assembled in the first assembly area and the modules in the first assembly area are arranged in two rows, and a plurality of high-voltage lines are all arranged between the two rows of modules in the first assembly area, and two groups of low-voltage lines are respectively arranged outside the two rows of modules in the first assembly area; One module is assembled in the second assembly area and a bracket is fixed above the module, and both the BDU module and the BMS module are installed on the bracket.

[0008] As a further improvement of the above solution of the present utility model, the box body includes a bottom plate, a liquid cooling plate and an outer frame, and the bottom plate, the liquid cooling plate and the outer frame are arranged in sequence from bottom to top. The edge of the liquid cooling plate is connected to the bottom of the outer frame through a plurality of FDS (Flow Drill Screw, abbreviated as FDS) bolts, and the edge of the bottom plate is connected to the bottom of the outer frame through a plurality of bolts.

[0009] As a further improvement of the above solution of the present utility model, a water inlet nozzle and a water outlet nozzle are provided at one end of the outer frame away from the BDU module; a liquid cooling flow channel is provided in the liquid cooling plate, and a water inlet interface and a water outlet interface communicating with the liquid cooling flow channel are provided at one end of the liquid cooling plate away from the BDU module, and the water inlet interface and the water outlet interface are respectively connected to the water inlet nozzle and the water outlet nozzle through water pipes.

[0010] As a further improvement of the above solution of the present utility model, the liquid cooling plate includes a stamping-formed liquid cooling upper plate and a liquid cooling lower plate. A flow channel groove is integrally formed on the side of the liquid cooling lower plate facing the liquid cooling upper plate, and the liquid cooling upper plate and the liquid cooling lower plate are welded together to seal the flow groove to form a liquid cooling flow channel.

[0011] As a further improvement of the above solution of the present utility model, a sealing foam is provided between the edge of the liquid cooling plate and the edge of the bottom plate.

[0012] As a further improvement of the above solution of the present utility model, a plurality of buffer foams arranged at intervals are provided between the liquid cooling plate and the bottom plate.

[0013] As a further improvement of the above solution of the present utility model, a PVC protective coating is provided on the bottom of the bottom plate.

[0014] As a further improvement of the above solution of the present utility model, the box body further includes a cover plate, the cover plate is hermetically connected to the top of the outer frame, and a convex portion is provided at one end of the cover plate close to the BDU module, and an avoidance groove is formed inside the convex portion, and the BDU module and the BMS module are arranged in the avoidance groove.

[0015] Compared with the prior art, the present utility model has the following beneficial effects:

[0016] 1. The highly integrated battery pack proposed by the present utility model fully considers the routing directions of high-voltage and low-voltage wires, completely isolates the high-voltage wires from the low-voltage wires, and has a regular and safe overall layout, avoiding the risks caused by chaotic wire routing.

[0017] 2. The highly integrated battery pack proposed by the present utility model makes full use of the layout space. On the basis of the original envelope space, the BDU module and the BMS module are innovatively placed above the module and fixed by brackets. While saving the layout space of the module, it facilitates the routing of high-voltage and low-voltage wires, makes the wire harness layout more regular, and also makes the fixation of the BDU module and the BMS module very reliable.

[0018] 3. The highly integrated battery pack proposed by the present utility model arranges the flow channels integrally on the liquid cooling plate, and sets the water inlet interface and the water outlet interface of the liquid cooling plate and the water inlet nozzle and the water outlet nozzle of the outer frame at one end, making the entire water path very short, and arranging it separately from the high-voltage and low-voltage areas. While greatly reducing the failure risk, it also greatly saves the internal space of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of a highly integrated battery pack proposed by an embodiment of the present utility model;

[0020] Figure 2 is an exploded view of the box body in a highly integrated battery pack proposed by an embodiment of the present utility model;

[0021] Figure 3 is a top view of the box body in a highly integrated battery pack proposed by an embodiment of the present utility model;

[0022] Figure 4 is a schematic structural diagram of the liquid cooling lower plate in a highly integrated battery pack proposed by an embodiment of the present utility model;

[0023] Figure 5 is a routing layout diagram of high-voltage and low-voltage wires in a highly integrated battery pack proposed by an embodiment of the present utility model.

[0024] Reference numerals: 1, module; 2, high-voltage wire; 3, low-voltage wire; 4, BDU module; 5, BMS module; 6, outer frame; 7, bottom plate; 8, liquid cooling plate; 801, liquid cooling lower plate; 802, flow channel groove; 9, FDS bolt; 10, bolt; 11, water inlet nozzle; 12, water outlet nozzle; 13, water inlet interface; 14, water outlet interface; 15, water pipe; 16, sealing foam; 17, buffer foam; 18, PVC protective coating; 19, cover plate; 1901, protruding part; 20, bracket; 21, high-voltage plug-in. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below in conjunction with specific embodiments. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the disclosure of the present utility model more thorough and comprehensive.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs. The terms used in the specification of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model.

[0027] Referring to Figure 1 , this embodiment provides a highly integrated battery pack, which includes a plurality of modules 1, a plurality of high-voltage lines 2, and a plurality of low-voltage lines 3. It may also include a high-voltage plug 21, a BDU module 4, a BMS module 5, and a box body. The box body is used to accommodate electrical components such as the module 1, high-voltage line 2, low-voltage line 3, high-voltage plug 21, BDU module 4, and BMS module 5, ensuring the stability of internal components such as battery cells, electrical components, and electrical connection devices, and preventing damage caused by vibration or impact during vehicle operation.

[0028] Combined with Figure 2 , in this embodiment, the box body includes a bottom plate 7, a liquid cooling plate 8, an outer frame 6, and a cover plate 19. The bottom plate 7, liquid cooling plate 8, outer frame 6, and cover plate 19 are arranged in sequence from bottom to top. The edge of the liquid cooling plate 8 is connected to the bottom of the outer frame 6 through a plurality of FDS bolts 9, the edge of the bottom plate 7 is connected to the bottom of the outer frame 6 through a plurality of bolts 10, and the cover plate 19 is hermetically connected to the top of the outer frame 6, thereby forming a completely sealed box body. Among them, the FDS bolt is a fastener used in the flow drill screw tightening process, and the flow drill screw tightening process is a technology that can drill holes, tap threads, and finally form a stable threaded connection during the connection process. Combined with Figure 3 , the box body has a first assembly area and a second assembly area for assembling the module 1. The area of the first assembly area is larger than that of the second assembly area, and the second assembly area is located at one end of the first assembly area. In this embodiment, a convex portion 1901 is provided above the cover plate 19 at the position of the second assembly area, and an avoidance groove is formed inside the convex portion 1901.

[0029] In this embodiment, the liquid cooling plate 8 adopts a welded integral structure. The liquid cooling plate 8 includes a liquid cooling upper plate and a liquid cooling lower plate 801 formed by stamping aluminum alloy profiles. Combined with Figure 4, on the side of the liquid-cooled lower plate 801 facing the liquid-cooled upper plate, a flow channel groove 802 is integrally formed. The liquid-cooled upper plate and the liquid-cooled lower plate 801 are welded and connected to seal the flow channel to form a liquid-cooled flow channel. At one end of the liquid-cooled upper plate away from the second assembly area, a water inlet interface 13 and a water outlet interface 14 communicating with the liquid-cooled flow channel are provided. The liquid-cooled plate 8 adopts an integrated flow channel without external pipeline connection, reducing the risk of joint failure and improving the volume utilization rate of the PACK, which is beneficial to improving the energy density.

[0030] In this embodiment, a sealing foam 16 is provided between the edge of the liquid-cooled plate 8 and the edge of the bottom plate 7, and a plurality of buffer foams 17 arranged at intervals are provided between the liquid-cooled plate 8 and the bottom plate 7. By increasing the buffer foam 17, while increasing the elastic deformation space, heat insulation is also carried out on the liquid-cooled plate 8 and the bottom plate 7. A PVC protective coating 18 is provided at the bottom of the bottom plate 7.

[0031] At one end of the outer frame 6 away from the second assembly area, a water inlet nozzle 11 and a water outlet nozzle 12 are provided. The water inlet nozzle 11 and the water outlet nozzle 12 are respectively connected to the water inlet interface 13 and the water outlet interface 14 through a water pipe 15. The length of the water pipe 15 of the entire liquid-cooled system is very short, greatly saving the internal space of the box body.

[0032] A plurality of modules 1 are all assembled in the box body, and, combined Figure 5 , a plurality of modules 1 are assembled in the first assembly area and the modules 1 in the first assembly area are arranged in two rows, and one module 1 is assembled in the second assembly area and a bracket 20 is fixed above the module 1.

[0033] Both the BDU module 4 and the BMS module 5 are installed on the bracket 20 and the BDU module 4 and the BMS module 5 are arranged in the avoidance groove, and the main positive lead-out electrode and the main negative lead-out electrode of the BDU module 4 are arranged on the side of the BDU module 4 close to the first assembly area. The BDU module 4 generally refers to a battery distribution unit in the field of electric vehicles and is a core component in electric vehicles. The BMS module 5 refers to a battery management system, which is an electronic control device for monitoring and managing the operating state of a battery pack. In this embodiment, the BDU module 4 and the BMS module 5 are innovatively placed above the module 1 and fixed by a sheet metal bracket 20. Without affecting the arrangement of the module 1, the envelope space is fully utilized, saving the arrangement space of the module 1, and also making the fixation of the BDU module 4 and the BMS module 5 very firm. The cover plate 19 makes a raised shape to reasonably avoid the BDU module 4 and the BMS module 5 in combination with the internal space usage, further effectively using the space and greatly improving the volume utilization rate. The BDU module 4 and the BMS module 5 are not only beneficial to electrical integration and full use of space, but also can make the layout of high-voltage and low-voltage wiring harnesses more regular. The BDU module 4 sets the main negative lead-out electrode and the main positive lead-out electrode at the middle position on the same side, regularizing the high-voltage direction of the system to the middle position, making the copper row direction regular.

[0034] The high-voltage plug-in 21 is installed on the outer frame 6 and is arranged at one end of the outer frame 6 away from the second assembly area.

[0035] A plurality of high-voltage wires 2 are all arranged between two rows of modules 1 in the first assembly area. The positive and negative poles of the high-voltage plug-in 21 are respectively connected to the main positive lead-out pole and the main negative lead-out pole of the BDU module 4 through the high-voltage wires 2. The positive and negative poles of each module 1 are connected to the BDU module 4 through the high-voltage wires 2. The high-voltage main positive is connected from the positive pole of the high-voltage plug-in 21 to the main positive lead-out pole of the BDU module 4, reaches the positive pole of the module 1 through components such as the fuse inside the BDU module 4, then returns from the negative pole of the module 1 to the BDU module 4, and returns to the negative pole of the high-voltage plug-in 21 through the main negative lead-out pole of the BDU module 4, thus forming a high-voltage loop.

[0036] The plurality of low-voltage wires 3 are divided into two groups. The two groups of low-voltage wires 3 are respectively arranged on the outer sides of two rows of modules 1 in the first assembly area and both groups of low-voltage wires 3 extend to both sides of the modules 1 in the second assembly area. The BMS module 5 is connected to a plurality of modules 1 through the plurality of low-voltage wires 3. In this embodiment, the low-voltage wires 3 can be completely fixed by using tie straps, reducing the operation steps of workers and facilitating installation.

[0037] In this embodiment, the high-voltage wire bundle 2 and the low-voltage wire bundle 3 are completely separated, and the overall layout is regular and safe.

[0038] It should be noted that when a component is referred to as being "installed on" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "arranged on" another component, it can be directly arranged on the other component or there may be an intermediate component at the same time. When a component is considered to be "fixed to" another component, it can be directly fixed to the other component or there may be an intermediate component at the same time.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this utility model belongs. The terms used in the description of this utility model in this specification are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0040] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0041] The above-described embodiments merely represent several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several variations and improvements can still be made, and these all fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent shall be subject to the appended claims.

Claims

1. A highly integrated battery pack, which includes a plurality of modules (1), a plurality of high-voltage lines (2) and a plurality of low-voltage lines (3), characterized in that, Multiple modules (1) are arranged side by side in two rows, and multiple high-voltage lines (2) are all arranged between the two rows of modules (1). Multiple low-voltage lines (3) are divided into two groups, and the two groups of low-voltage lines (3) are respectively arranged outside the two rows of modules (1).

2. The highly integrated battery pack according to claim 1, wherein, It further includes a high-voltage plug-in (21), a BDU module (4) and a BMS module (5); the BDU module (4) and the BMS module (5) are arranged at one end of the two rows of modules (1), and the high-voltage plug-in (21) is arranged at the other end of the two rows of modules (1). The positive and negative poles of the high-voltage plug-in (21) are respectively connected to the main positive lead-out pole and the main negative lead-out pole of the BDU module (4) through the high-voltage line (2). The positive and negative poles of each module (1) are connected to the BDU module (4) through the high-voltage line (2); the BMS module (5) is connected to multiple modules (1) respectively through multiple low-voltage lines (3).

3. The highly integrated battery pack according to claim 2, characterized in that, It further includes a box body. A first assembly area and a second assembly area are arranged in the box body. The area of the first assembly area is larger than that of the second assembly area, and the second assembly area is located at one end of the first assembly area. Multiple modules (1) are assembled in the first assembly area and the modules (1) in the first assembly area are arranged in two rows. Multiple high-voltage lines (2) are all arranged between the two rows of modules (1) in the first assembly area. Two groups of low-voltage lines (3) are respectively arranged outside the two rows of modules (1) in the first assembly area; One module (1) is assembled in the second assembly area, and a bracket (20) is fixed above the module (1). The BDU module (4) and the BMS module (5) are both installed on the bracket (20).

4. The highly integrated battery pack according to claim 3, characterized in that, The box body includes a bottom plate (7), a liquid cooling plate (8) and an outer frame (6). The bottom plate (7), the liquid cooling plate (8) and the outer frame (6) are arranged in sequence from bottom to top. The edge of the liquid cooling plate (8) is connected to the bottom of the outer frame (6) through multiple FDS bolts (9), and the edge of the bottom plate (7) is connected to the bottom of the outer frame (6) through multiple bolts (10).

5. The highly integrated battery pack according to claim 4, characterized in that, An inlet nozzle (11) and an outlet nozzle (12) are arranged at one end of the outer frame (6) away from the BDU module (4); a liquid cooling flow channel is arranged in the liquid cooling plate (8), and an inlet interface (13) and an outlet interface (14) communicated with the liquid cooling flow channel are arranged at one end of the liquid cooling plate (8) away from the BDU module (4). The inlet interface (13) and the outlet interface (14) are respectively connected to the inlet nozzle (11) and the outlet nozzle (12) through water pipes (15).

6. The highly integrated battery pack according to claim 4, wherein, The liquid cooling plate (8) includes a liquid cooling upper plate and a liquid cooling lower plate (801) formed by stamping. A flow channel groove (802) is integrally formed on the side of the liquid cooling lower plate (801) facing the liquid cooling upper plate. The liquid cooling upper plate is welded to the liquid cooling lower plate (801) to seal the flow groove to form a liquid cooling flow channel.

7. The highly integrated battery pack according to claim 4, wherein A sealing foam (16) is arranged between the edge of the liquid cooling plate (8) and the edge of the bottom plate (7).

8. The highly integrated battery pack according to claim 4, wherein, Multiple buffer foams (17) arranged at intervals are arranged between the liquid cooling plate (8) and the bottom plate (7).

9. The high-integration battery pack according to claim 4, characterized in that, A PVC protective coating (18) is arranged at the bottom of the bottom plate (7).

10. The highly integrated battery pack according to claim 4, wherein The box body further includes a cover plate (19). The cover plate (19) is hermetically connected to the top of the outer frame (6). A raised portion (1901) is provided at one end of the cover plate (19) close to the BDU module (4). An avoidance groove is formed inside the raised portion (1901). The BDU module (4) and the BMS module (5) are arranged in the avoidance groove.

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