High-voltage battery system

Abstract

The utility model discloses a high-voltage battery system which comprises a box body as well as a battery module and an electric control assembly which are arranged in the box body, the battery module is electrically connected with the electric control assembly, the box body comprises a bottom box and a cover body covering the bottom box, a lower assembly layer and an upper assembly layer are arranged in the bottom box, and the upper assembly layer is arranged in the box body. The lower assembly layer is provided with a plurality of battery modules in parallel, and the upper assembly layer is provided with a battery module and an electric control assembly; the cover body comprises a cover plate matched with the bottom box, a cover box is integrally arranged on the cover plate, and the cover box and the bottom box are matched to form a double-layer structure with the through interior. According to the invention, the structure is simple, the assembly is convenient, through reasonable arrangement, the electric control assembly and the battery module can be arranged on the upper assembly layer, the waste of the upper space is avoided, in addition, the cover box is integrally arranged on the cover plate, and the cover box and the bottom box are matched to form an internal through double-layer structure; and the structure of the whole battery system can be reduced while the battery modules are increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium batteries, and in particular relates to a high-voltage battery system. Background Art

[0002] Electric forklifts are electrically driven, with direct current from a battery pack driving each motor. Compared with internal combustion forklifts, they are pollution-free, easy to operate, energy-efficient and highly efficient. With economic development and the increasing requirements for environmental protection and energy conservation, electric forklifts are developing rapidly, especially in ports, warehousing, tobacco, food, textile and other industries. Electric forklifts are gradually replacing internal combustion forklifts and becoming the main force in fixed-range cargo handling.

[0003] At present, the battery PACKs used in the electric forklift industry are mainly divided into two categories, lead-acid battery PACKs and lithium battery PACKs. Among them, the traditional lead-acid power battery and battery pack are made into an open structure without a cover due to safety and cost requirements. The advantage is that it is convenient for the discharge of battery acid gas and also conducive to maintenance. The disadvantage is that the lead-acid battery has a low energy density, a memory effect, and the overall protection performance of the battery pack is low. The new energy lithium-ion power battery has a higher energy density, does not produce acid gas, has no memory effect, and the battery pack can be sealed. The overall protection performance is higher, but the maintenance convenience is lower.

[0004] Regardless of the type of battery PACK, thick steel plates are welded into a box body, topped with a cover, and supplemented with a counterweight to meet the protection and weight requirements of the internal battery cells. Under the traditional structure, the battery box uses multiple battery cells assembled in the battery box and electrically connected to the electronic components to form a battery box assembly. However, the existing forklift battery box is relatively large, and the battery cell assembly and electronic component installation are complicated, the stability is poor, and it is inconvenient to repair. Utility Model Content

[0005] In order to make up for the deficiencies of the prior art, the utility model provides a high-voltage battery system to solve the problems of the existing battery box being too large in size and the complicated arrangement of battery cells and components.

[0006] The high-voltage battery system comprises a box body and a battery module and an electronic control component arranged in the box body, the battery module and the electronic control component are electrically connected, the box body comprises a bottom box and a cover body covering the bottom box, the bottom box is provided with a lower assembly layer and an upper assembly layer, the lower assembly layer is provided with a plurality of battery modules arranged in parallel, and the upper assembly layer is provided with a battery module and an electronic control component; the cover body comprises a cover plate matched with the bottom box, a cover box is integrally provided on the cover plate, and the cover box cooperates with the bottom box to form an internally through double-layer structure.

[0007] Furthermore, a first partition and a second partition are arranged between the lower assembly layer and the upper assembly layer, the first partition and the second partition are laid side by side, an electric control component is arranged on the first partition, and a battery module is arranged on the second partition.

[0008] Furthermore, the cover plate includes an assembly plate and an assembly frame arranged on one side of the assembly plate, and the cover box is integrally arranged on the assembly frame to cover the upper battery module and part of the electronic control components; the cover plate and the bottom box are fastened by a plurality of fasteners.

[0009] Furthermore, a first assembly rack is arranged on the assembly plate to cooperate with the assembly of the DC / DC; and a second assembly rack is arranged on the top wall of the cover box to cooperate with the assembly of the whole vehicle VCU.

[0010] Furthermore, a positive charging interface, a negative charging interface, a vehicle communication interface, an MSD interface, a PTC interface, a DCDC interface, an A / C interface, an MCU interface, an MCU interface and a battery life switch are provided on the side of the cover box close to the assembly plate.

[0011] Furthermore, the top wall of the cover box is provided with an inspection window and an inspection cover cooperating with the inspection window, and a sealing strip is provided between the inspection window and the inspection cover.

[0012] Furthermore, the electronic control component includes a charging relay, a discharging relay, a fuse, a shunt, a BMS master control, a G module, a pre-charging resistor, and a pre-charging relay.

[0013] Furthermore, the lower assembly layer is equipped with four groups of battery modules arranged in parallel, and the upper assembly layer is equipped with two groups of battery modules and electronic control components.

[0014] Furthermore, a lifting plate and a charging seat bracket are provided on the side wall of the bottom box on the side of the side assembly plate, and the charging seat bracket is provided with a charging harness port; a lifting frame is provided on the side wall of the bottom box away from the assembly plate; guide strips are provided on the other two side walls of the bottom box, and the outer end surfaces of the guide strips protrude from the outer end walls of the cover body.

[0015] Furthermore, a plurality of wiring harness installation holes are arranged on the CCS upper cover of the battery module.

[0016] Compared with the prior art, the utility model has the following advantages: the utility model has a simple structure and is easy to assemble. Through reasonable layout, in addition to the electronic control components, the battery module can be arranged on the upper assembly layer, thereby avoiding the waste of the upper space. In addition, a cover box is integrally arranged on the cover plate, and the cover box cooperates with the bottom box to form an internally connected double-layer structure, which can increase the battery module while reducing the structure of the entire battery system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is one of the side structural diagrams of the utility model;

[0019] Figure 3 This is the second side view structural diagram of the utility model;

[0020] Figure 4 It is a top view of the structure of the utility model;

[0021] Figure 5 It is a separation diagram of the utility model;

[0022] Figure 6 It is the internal structure diagram of the utility model;

[0023] Figure 7 This is a structural diagram of the battery module of the present utility model.

[0024] In the figure: 10-box, 11-bottom box, 12-cover, 121-cover plate, 1211-assembly plate, 1212-first assembly frame, 122-cover box, 123-inspection window, 124-inspection cover, 125-first sealing strip, 126-second assembly frame, 13-first partition, 14-second partition, 15-second sealing strip, 20-battery module, 21-wiring harness mounting hole, 30-hanging plate, 40-charging seat bracket, 50-charging harness port, 60-hanging frame, 70-guide strip, 80-electronic control component. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to more clearly understand the technical solution of the present application, the present invention is further described below in conjunction with the accompanying drawings.

[0026] like Figure 1-Figure 6 In the embodiment shown, a high-voltage battery system includes a box 10 and a battery module 20 and an electronic control component 80 arranged in the box 10. The battery module 20 and the electronic control component 80 are electrically connected. The box 10 includes a bottom box 11 and a cover 12 covering the bottom box 11. The bottom box 11 is provided with a lower assembly layer and an upper assembly layer. The lower assembly layer is provided with a plurality of battery modules 20 in parallel, and the upper assembly layer is provided with a battery module 20 and an electronic control component 80. The cover 12 includes a cover plate 121 matched with the bottom box 11, and a cover box 122 is integrally provided on the cover plate 121. The cover box 122 cooperates with the bottom box 11 to form an internally connected double-layer structure. The electronic control component 80 includes a charging relay, a discharging relay, a fuse, a shunt, a BMS master control, a 4G module, a pre-charging resistor, and a pre-charging relay.

[0027] Specifically, a first partition 13 and a second partition 14 are arranged between the lower assembly layer and the upper assembly layer, the first partition 13 and the second partition 14 are laid side by side, an electric control component is arranged on the first partition 13, and a battery module 20 is arranged on the second partition 14. The cover plate 121 includes an assembly plate 1211 and an assembly frame arranged on one side of the assembly plate 1211, and a cover box 122 is integrally arranged on the assembly frame to cover the upper battery module 20 and part of the electric control component 80; the cover plate 121 and the bottom box 11 are fastened by a plurality of fasteners, and the fasteners are preferably bolt assemblies / screw assemblies. A first assembly frame 1212 is arranged on the assembly plate 1211 to cooperate with the assembly of DC / DC; a second assembly frame 126 is arranged on the top wall of the cover box 122 to cooperate with the assembly of the whole vehicle VCU.

[0028] As shown in the figure, the cover box 122 is provided with a positive charging interface, a negative charging interface, a vehicle communication interface, an MSD interface, a PTC interface, a DCDC interface, an A / C interface, an MCU1 interface, an MCU2 interface, and a battery life switch on the side of the assembly plate 1211. The top wall of the cover box 122 is provided with an inspection window 123 and an inspection cover 124 that cooperates with the inspection window 123. A sealing strip 125 is provided between the inspection window 123 and the inspection cover 124 to ensure the sealing of the connection. All electrical components can be seen through the inspection cover 124, which is convenient for after-sales service technicians to maintain the battery.

[0029] In addition, a lifting plate 30 and a charging stand bracket 40 are provided on the side wall of the bottom box 11 on the side of the side assembly plate 1211, and the charging stand bracket 40 is provided with a charging harness port 50; a lifting frame 60 is provided on the side wall of the bottom box 11 away from the assembly plate 1211; guide bars 70 are provided on the other two side walls of the bottom box 11, and the outer end surface of the guide bar 70 protrudes from the outer end wall of the cover body 12. The guide bar 70 is used for guiding. In this embodiment, the guide bar 70 protrudes from the outer end wall of the cover body 12 by 3 mm to prevent the battery system from colliding with the side wall of the whole vehicle.

[0030] In this embodiment, four battery modules 20 are arranged in parallel on the lower assembly layer, and two battery modules 20 and an electronic control component 80 are arranged on the upper assembly layer. Figure 7 As shown, in this embodiment, a plurality of harness mounting holes 21 are provided on the CCS upper cover of the battery module 20. The existing battery box wall has harness mounting holes, and space needs to be reserved for the harness. However, I put a mounting groove on the CCS upper cover of the module, so there is no need to reserve the side, and the harness can be fixed on the module.

[0031] Through reasonable layout, in addition to the electronic control component 80, the battery module 20 can be arranged on the upper assembly layer, avoiding the waste of the upper space. In addition, the cover box 122 is integrally arranged on the cover plate 121, and the cover box 122 cooperates with the bottom box 11 to form an internally connected double-layer structure, thereby reducing the structure of the entire battery system.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A high-voltage battery system, comprising a housing (10) and a battery module (20) and an electronic control component (80) arranged in the housing (10), wherein the battery module (20) and the electronic control component (80) are electrically connected, and characterized in that: The box body (10) comprises a bottom box (11) and a cover body (12) covering the bottom box (11); a lower assembly layer and an upper assembly layer are provided inside the bottom box (11); a plurality of battery modules (20) are arranged in parallel on the lower assembly layer; and a battery module (20) and an electric control component are arranged on the upper assembly layer; the cover body (12) comprises a cover plate (121) matched with the bottom box (11); a cover box (122) is integrally provided on the cover plate (121); the cover box (122) cooperates with the bottom box (11) to form an internally connected double-layer structure.

2. A high-voltage battery system according to claim 1, characterized in that: A first partition (13) and a second partition (14) are arranged between the lower assembly layer and the upper assembly layer. The first partition (13) and the second partition (14) are laid in parallel. An electric control component (80) is arranged on the first partition (13), and a battery module (20) is arranged on the second partition (14).

3. A high voltage battery system according to claim 2, characterized in that: The cover plate (121) comprises an assembly plate (1211) and an assembly frame arranged on one side of the assembly plate (1211); the cover box (122) is integrally arranged on the assembly frame to cover the upper battery module (20) and part of the electric control components; the cover plate (121) and the bottom box (11) are fastened together by a plurality of fasteners.

4. A high-voltage battery system according to claim 3, characterized in that: A first assembly rack (1212) is arranged on the assembly plate (1211) to cooperate with assembling the DC / DC; and a second assembly rack (126) is arranged on the top wall of the cover box (122) to cooperate with assembling the whole vehicle VCU.

5. A high-voltage battery system according to claim 3, characterized in that: The cover box (122) is provided with a positive charging interface, a negative charging interface, a vehicle communication interface, an MSD interface, a PTC interface, a DCDC interface, an A / C interface, an MCU1 interface, an MCU2 interface and a battery life switch on one side of the cover box (122) close to the assembly plate (1211).

6. A high-voltage battery system according to claim 3, characterized in that: The top wall of the cover box (122) is provided with an inspection window (123) and an inspection cover (124) that cooperates with the inspection window (123), and a sealing strip (125) is provided between the inspection window (123) and the inspection cover (124).

7. A high voltage battery system according to any one of claims 1 to 6, characterized in that: The electric control component (80) comprises a charging relay, a discharging relay, a fuse, a shunt, a BMS main control, a 4G module, a pre-charging resistor, and a pre-charging relay.

8. A high-voltage battery system according to claim 7, characterized in that: The lower assembly layer is equipped with four groups of battery modules (20) arranged in parallel, and the upper assembly layer is equipped with two groups of battery modules (20) and an electric control component (80).

9. A high voltage battery system according to any one of claims 3 to 6, characterized in that: A hanging plate (30) and a charging seat bracket (40) are arranged on the side wall of the bottom box (11) close to the side assembly plate (1211), and the charging seat bracket (40) is provided with a charging harness port (50); a hanging frame (60) is arranged on the side wall of the bottom box (11) away from the assembly plate (1211); and guide strips (70) are arranged on the other two side walls of the bottom box (11), and the outer end surfaces of the guide strips (70) protrude from the outer end walls of the cover body (12).

10. A high voltage battery system according to any one of claims 1 to 6, characterized in that: A plurality of wiring harness installation holes (21) are provided on the CCS upper cover of the battery module (20).

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