An integrated disconnect device for micro-face battery pack

Abstract

The utility model relates to battery pack technical field, concretely is a kind of integrated disconnecting device applied to micro-face battery pack.The utility model discloses upper shell and lower shell, the copper bar, high voltage sampling wire harness, low voltage control wire harness, fuse, high voltage wire harness, main positive relay, shunt, main negative relay and fast charging relay and pre-charging relay are arranged in the shell body formed by upper shell and lower shell inside, the lower end of the pre-charging relay is provided with the pre-charging resistance of cooperation, the copper bar is fixed by screw, the upper end of the copper bar is provided with fin, the fin is aluminum fin, the fin is fixed to connecting copper bar by rivet structure, the upper end of the upper shell is provided with anti-electric shock cover, when battery pack uses BDU charge-discharge, BDU is provided with liquid cooling and self-cooling, cooperates copper bar, so that cooling in the BDU charge-discharge process, and then as far as possible solve the problem that BDU internal space is narrow and not easy to radiate heat.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, and in particular to an integrated disconnection device for micro-surface battery packs. Background Technology

[0002] In the field of new energy battery packs, due to the differences in customer needs, different disconnection devices (BDU) designs exist for different customers. There are many types of BDUs, resulting in resource waste, high development costs, and long product development cycles, which does not meet the growing demand for platformization.

[0003] Currently, the second-generation logistics vehicle series projects have a wide variety of battery capacities and rates, including 1.5C-56kWh, 2C-52kWh, 2C-56 kWh, and 2C-58 kWh series. With the trend of increasing battery capacity and rate, in order to reduce the development of BDU shells, platform projects can use the same BDU shell. However, high battery capacity and high rate PACKs have the problem of increased internal temperature of the BDU. Utility Model Content

[0004] The purpose of this invention is to solve the problem of internal temperature rise in high-capacity, high-rate PACKs using the same BDU housing in practical applications, and proposes an integrated disconnection device for micro-surface battery packs.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an integrated disconnection device for micro-surface battery packs, comprising an upper shell and a lower shell, wherein the housing composed of the upper shell and the lower shell contains a copper busbar, a high-voltage sampling harness, a low-voltage control harness, a fuse, a high-voltage harness, a main positive relay, a shunt, a main negative relay, a fast-charging relay, and a pre-charging relay, wherein a pre-charging resistor is provided at the lower end of the pre-charging relay, and the copper busbar is fixed by screws.

[0006] The effects achieved by the above components are as follows: When the battery pack is charged and discharged using the BDU, the BDU is equipped with liquid cooling and self-cooling (specific structural diagram not shown), which, together with the copper busbar, allows for cooling during the charging and discharging process of the BDU. This helps to solve the problem of limited internal space and poor heat dissipation in the BDU as much as possible. The BDU has basic control circuits for fast charging and discharging, as well as a three-in-one discharge circuit, enabling charging and discharging of battery packs at different rates. This reduces the number of BDU molds required, lowers the development cost of battery pack BDU products, shortens the development cycle of BDU products, improves the versatility of BDU products, and enhances the product integration and platform design concept, thereby improving the level of product research and development.

[0007] Preferably, the upper end of the copper busbar is provided with diffused fins, and the diffused fins are aluminum fins.

[0008] The effect achieved by the above components is as follows: by adding aluminum fins and fixing them to the connecting copper busbar with a rivet structure, the heat on the copper busbar can be effectively removed. According to the current thermal simulation analysis data, the temperature is effectively reduced by 10℃ after adding the heat sink, which ensures the service life and reliability of the internal components of the BDU.

[0009] Preferably, the fins are fixed to the connecting copper busbar by a rivet structure, and the upper end of the upper shell is provided with an anti-electric shock cover.

[0010] The effect achieved by the above-mentioned components is to prevent maintenance workers from being electrocuted by installing anti-electric shock covers.

[0011] Preferably, a pre-charge resistor protection cover is provided at the lower end of the lower shell, the pre-charge resistor protection cover being used to protect the pre-charge resistor.

[0012] The effect achieved by the above components is to protect the pre-charge resistor by setting a pre-charge resistor protection cover.

[0013] Preferably, a pre-charge relay protection cover is provided at the lower end of the lower shell, which is used to protect the pre-charge relay.

[0014] The effect achieved by the above components is to protect the precharge relay by setting a protective cover for the precharge relay.

[0015] Preferably, the upper end of the upper shell is provided with a product label and a high-pressure warning label fixedly connected by adhesive.

[0016] The effect achieved by the above components is to provide product descriptions and warnings for BDU products by setting product labels and high-voltage warning labels.

[0017] Preferably, the upper shell and the lower shell are fixed together by a snap-fit ​​structure, and the lower shell and the precharge relay protection cover are fixed together by a snap-fit ​​structure.

[0018] The effect achieved by the above components is: dragging the precharge relay protection cover causes the clips of the precharge relay protection cover to separate from the protrusions on the lower shell surface.

[0019] In summary, the beneficial effects of this utility model are as follows: In this invention, when the battery pack uses a BDU for charging and discharging, the BDU is equipped with liquid cooling and self-cooling, along with copper busbars, to cool the BDU during charging and discharging. This effectively addresses the problem of limited internal space and poor heat dissipation in the BDU. The BDU has basic control circuits for fast charging and discharging, as well as a three-in-one discharge circuit, enabling charging and discharging of battery packs at different rates. This reduces the number of BDU molds required, lowers the development cost of battery pack BDU products, shortens the development cycle, and improves the versatility of BDU products. It also enhances the product integration and platform design concepts, thereby improving the overall product development level. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the explosion of this utility model; Figure 2 This is a three-dimensional structural diagram of the present invention; Figure 3 This is a three-dimensional structural diagram of the anti-electric shock cover of this utility model; Figure 4 This is a three-dimensional structural diagram of the diffuser fins of this utility model.

[0021] Legend: 1. Product label; 2. High voltage warning label; 3. Electric shock protection cover; 4. Upper shell; 5. Spread fins; 6. Screw; 7. Copper busbar; 8. High voltage sampling harness; 9. Low voltage control harness; 10. Fuse; 11. High voltage harness; 12. Main positive relay; 13. Shunt; 14. Main negative relay; 15. Fast charging relay; 16. Pre-charge relay; 17. Pre-charge resistor; 18. Lower shell; 19. Pre-charge resistor protection cover; 20. Pre-charge relay protection cover. Detailed Implementation

[0022] Reference Figure 1As shown, this utility model provides a technical solution: an integrated disconnection device for a micro-faceted battery pack includes an upper shell 4 and a lower shell 18. Inside the shell formed by the upper shell 4 and the lower shell 18 are arranged a copper busbar 7, a high-voltage sampling harness 8, a low-voltage control harness 9, a fuse 10, a high-voltage harness 11, a main positive relay 12, a shunt 13, a main negative relay 14, a fast-charging relay 15, and a pre-charge relay 16. A pre-charge resistor 17 is provided at the lower end of the pre-charge relay 16 for cooperation. The copper busbar 7 is fixed by screws 6. The battery pack is charged and discharged using a BDU. During operation, the BDU is equipped with liquid cooling and self-cooling, along with copper busbar 7, to cool the BDU during charging and discharging. This effectively addresses the issue of limited internal space and poor heat dissipation in the BDU. The BDU features basic control circuits for fast charging and discharging, as well as a three-in-one discharge circuit, enabling charging and discharging of battery packs at different rates. This reduces the number of BDU molds required, lowers the development cost of battery pack BDU products, shortens the BDU product development cycle, and enhances the versatility of BDU products. It also promotes product integration and platform design concepts, thereby improving product R&D capabilities.

[0023] Reference Figure 1 and Figure 3 as well as Figure 4 As shown in this embodiment: the upper end of the copper busbar 7 is provided with a diffused fin 5, which is an aluminum fin. By adding aluminum fins and fixing them to the connecting copper busbar 7 with a rivet structure, the heat on the copper busbar 7 can be effectively dissipated. According to the current thermal simulation analysis data, the temperature is effectively reduced by 10°C after adding the heat sink, which ensures the service life and reliability of the internal components of the BDU. The diffused fin 5 is fixed to the connecting copper busbar 7 by a rivet structure. The upper end of the upper shell 4 is provided with an anti-electric shock cover 3. By setting the anti-electric shock cover 3, the electric shock of maintenance workers is prevented. The lower end of the lower shell 18 is provided with a pre-charge resistor protection cover 19. The pre-charge resistor protection cover 19 is used to protect the pre-charge resistor 17. By setting the pre-charge resistor 17 protection cover, the pre-charge resistor 17 is protected.

[0024] Reference Figure 1 As shown in this embodiment: a pre-charge relay protection cover 20 is provided at the lower end of the lower shell 18. The pre-charge relay protection cover 20 is used to protect the pre-charge relay 16. By providing the pre-charge relay protection cover 20, the pre-charge relay 16 is protected. A product label 1 and a high-voltage warning label 2 are provided at the upper end of the upper shell 4 and are fixedly connected by glue. By providing the product label 1 and the high-voltage warning label 2, the BDU product is explained and warned. The upper shell 4 and the lower shell 18 are fixed by a snap-fit ​​structure. The lower shell 18 and the pre-charge relay protection cover 20 are fixed by a snap-fit ​​structure. Dragging the pre-charge relay 16 protection cover causes the snap-fit ​​of the pre-charge relay protection cover 20 to separate from the protrusion on the surface of the lower shell 18.

[0025] Working principle: When the battery pack uses a BDU for charging and discharging, the BDU is equipped with liquid cooling and self-cooling (specific structural diagram not shown), which, together with the copper busbar 7, allows for cooling during the charging and discharging process. This effectively addresses the issue of limited internal space and poor heat dissipation in the BDU. The BDU features basic control circuits for fast charging and discharging, as well as a three-in-one discharge circuit, enabling charging and discharging of battery packs at different rates. This reduces the number of BDU molds required, lowers the development cost of battery pack BDU products, shortens the product development cycle, and improves the versatility of BDU products. It also enhances product integration and platform design concepts, improving product development capabilities. Aluminum fins are added and fixed to the connecting copper busbar using a riveting structure. On 7, the heat can be effectively dissipated from the copper busbar 7. According to the current thermal simulation analysis data, the temperature is effectively reduced by 10℃ after adding the heat sink, which ensures the service life and reliability of the internal components of the BDU. By setting the anti-electric shock cover 3, the electric shock of maintenance workers is prevented. By setting the pre-charge resistor 17 protection cover, the pre-charge resistor 17 is protected. By setting the pre-charge relay protection cover 20, the pre-charge relay 16 is protected. By setting the product label 1 and the high voltage warning label 2, the BDU product is explained and warned. Dragging the pre-charge relay 16 protection cover makes the clip of the pre-charge relay protection cover 20 separate from the protrusion on the surface of the lower shell 18. When a short circuit occurs, the fuse 10 blows.

[0026] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may use the disclosed technical content to make changes or modifications to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the scope of the utility model's technical solution, still fall within the protection scope of this utility model's technical solution. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through specific circumstances.

Claims

1. An integrated disconnection device for micro-surface battery packs, comprising an upper shell (4) and a lower shell (18), characterized in that: The housing consisting of the upper shell (4) and the lower shell (18) contains a copper busbar (7), a high-voltage sampling harness (8), a low-voltage control harness (9), a fuse (10), a high-voltage harness (11), a main positive relay (12), a shunt (13), a main negative relay (14), a fast-charging relay (15), and a pre-charging relay (16). The lower end of the pre-charging relay (16) is provided with a pre-charging resistor (17) for use. The copper busbar (7) is fixed by screws (6).

2. The integrated disconnection device for micro-surface battery packs according to claim 1, characterized in that: The upper end of the copper busbar (7) is provided with a diffuse fin (5), which is an aluminum fin.

3. The integrated disconnection device for micro-surface battery packs according to claim 2, characterized in that: The diffused fins (5) are fixed to the connecting copper busbar (7) by a rivet structure, and the upper end of the upper shell (4) is provided with an anti-electric shock cover (3).

4. An integrated disconnection device for micro-surface battery packs according to claim 3, characterized in that: The lower end of the lower shell (18) is provided with a pre-charge resistor protection cover (19), which is used to protect the pre-charge resistor (17).

5. An integrated disconnection device for a micro-surface battery pack according to claim 4, characterized in that: The lower end of the lower shell (18) is provided with a pre-charge relay protection cover (20), which is used to protect the pre-charge relay (16).

6. An integrated disconnection device for a micro-surface battery pack according to claim 5, characterized in that: The upper end of the upper shell (4) is provided with a product label (1) and a high-pressure warning label (2) that are fixedly connected by glue.

7. An integrated disconnection device for a micro-surface battery pack according to claim 6, characterized in that: The upper shell (4) and the lower shell (18) are fixed by a snap-fit ​​structure, and the lower shell (18) and the precharge relay protection cover (20) are fixed by a snap-fit ​​structure.

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