CN211670399U

CN211670399U - Lithium battery management system joint

Info

Publication number: CN211670399U
Application number: CN202020528008.6U
Authority: CN
Inventors: 王素芳; 张孝迪
Original assignee: Beijing Kinglong New Energy Technology Co ltd
Current assignee: Beijing Kinglong New Energy Technology Co ltd
Priority date: 2020-04-10
Filing date: 2020-04-10
Publication date: 2020-10-13
Anticipated expiration: 2030-04-10

Abstract

The utility model provides a lithium battery management system connects, includes a casing, sets up in the first side and the second side of the relative both sides of casing and sets up in the inside keysets of casing, wherein: the first side is provided with four terminals including a first terminal, a second terminal, a third terminal, a fourth terminal, a power supply line bundle V-, a communication line bundle CAN L, a communication line bundle CAN H and a power supply line bundle V + of the battery management unit, the second side is provided with two RJ45 interfaces, the RJ45 interfaces are used for cascading with the adjacent battery management unit, the adapter plate is provided with two wire harnesses, each wire harness comprises 1 st cable, 8 th cable, on the first side, the 1 st cable, the 8 th cable and the first terminal, the second terminal and one of the RJ45 interfaces are sequentially connected with the 1 st cable, the 8 th cable and the first terminal in each wire harness in a preset line sequence.

Description

Lithium battery management system joint

Technical Field

The utility model relates to a battery management system field specifically relates to a design of lithium cell battery management system's joint.

Background

The battery management system that current energy storage system (the utility model discloses focus on the family with energy storage cabinet or commercial energy storage cabinet field) adopts a owner more to follow formula, Battery Management System (BMS) x 1+ Battery Management Unit (BMU) x N promptly. In the application process, in order to realize the communication between each battery management unit, adopt plug-in terminal mostly, the mode that twists who adopts the screw between battery management unit's pencil and the pencil more connects, the pencil is too tight or too loose CAN bring power supply and communication unstability, the sampling line mainly includes BMU power supply and CAN communication pencil between each battery management unit, because there is slight difference in current assembly process installation battery PACK module fixed position and connected mode, this just leads to the pencil CAN't accomplish length and cable technology standardization, manual work has been increased, this brings the waste in time and the cost to production automation flow and extensive energy storage battery PACK system in groups.

The wiring harnesses of the battery management unit are mainly classified into three main categories: the system comprises a collecting wire harness, a power supply wire harness and a communication wire harness. The collecting wire harness mainly comprises voltage collection and temperature collection, and the collecting wire harness is mainly connected with an electric core in a battery PACK; the power supply wire harness is used for supplying power to the battery management unit, and the communication wire harness is used for communication cascade of the Battery Management Unit (BMU) and the Battery Management System (BMS) to realize data transmission and command issuing. The wiring harness connection inside the existing battery management system is shown in fig. 1, each battery management unit outputs 4 cables to respectively supply power V + and V-to the BMU, and BMU communication wiring harnesses CAN H (H in the figure) and CAN L (L in the figure), wherein V + and V-are used for supplying power to the BMU, and CAN H (H in the figure) and CAN L (L in the figure) realize the communication cascade of the Battery Management Unit (BMU) and the Battery Management System (BMS). Therefore, in the prior art, when a plurality of BMUs are cascaded, 4 connecting wires are needed between every two adjacent BMUs, each connecting wire needs to be manually installed one by one, the requirement on the accuracy of manual operation is high, the manual operation consumes long time, and the plurality of connecting wires are wound mutually, so that the connecting wires are inconvenient.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a lithium battery management system connects, it is integrated inside connecting the connecting wire between the adjacent BMU, only need to peg graft with battery management unit's the corresponding port and the net twine respectively with the both ends that connect and just can realize that a plurality of BMUs cascade.

In order to achieve the above object, the utility model provides a lithium battery management system connects, it includes: a casing, set up in the first side and the second side of the relative both sides of casing and set up in the adapter plate of casing inside, wherein:

the first side is provided with four terminals including a first terminal, a second terminal, a third terminal, a fourth terminal and a fourth terminal, wherein the first terminal, the second terminal, the third terminal and the fourth terminal are respectively used for being connected with V & lt- & gt of a power supply wire bundle, CAN L & lt- & gt of a communication wire bundle, CAN H & lt- & gt of the communication wire bundle and V & lt + & gt of a power supply,

the second side is provided with two RJ45 interfaces, the RJ45 interface is used for cascading with the adjacent battery management unit,

the keyset is equipped with two pencil, every pencil all includes 1 st cable ~ 8 th cable, on first side, the 1 st cable in every pencil, the 2 nd cable all is connected with first terminal, the 3 rd cable in every pencil, the 4 th cable all is connected with the second terminal, the 5 th cable in every pencil, the 6 th cable all is connected with the third terminal, the 7 th cable in every pencil, the 8 th cable all is connected with the fourth terminal, on the second side, 1 st cable ~ 8 th cable in every pencil is in proper order according to predetermineeing line sequence and one of them RJ45 interface connection, predetermine line sequence and be orange white, orange, green white, blue white, green, brown white, brown.

Drawings

FIG. 1 is a schematic diagram of a conventional battery management system connected to a battery management unit;

fig. 2 is a schematic view of the wire harness connection on the adapter plate of the present invention;

fig. 3 is a schematic diagram of the connection between the battery management system and the battery management unit according to the present invention.

Description of reference numerals: a communication CAN H of the H-BMU; a communication CAN L of the L-BMU; power supply of V-, V + -BMU; link1, Link2-RJ45 interfaces; a-a first terminal; b-a second terminal; c-a third terminal; d-a fourth terminal; s1 — first side; s2 — second side; k-shell.

Detailed Description

Fig. 1 is current battery management system and battery management unit connection schematic diagram, and fig. 2 is the utility model discloses a pencil connection schematic diagram on the keysets, fig. 3 is the utility model discloses a battery management system and battery management unit connection schematic diagram, the utility model provides a lithium Battery Management System (BMS) connects, and it is arranged in cascading a plurality of Battery Management Units (BMU) together in lithium Battery Management System (BMS), and as shown in fig. 2, it includes: a housing (K), a first side (S1) and a second side (S2) disposed at two opposite sides of the housing (K), and an adapter board (not shown) disposed inside the housing (K), wherein:

the first side (S1) is provided with four terminals (A, B, C, D) which are a first terminal to a fourth terminal, and the first terminal to the fourth terminal are respectively used for being connected with V-of a power supply harness of a Battery Management Unit (BMU), CAN L of a communication harness, CAN H of the communication harness and V + of the power supply harness;

the second side is provided with two RJ45 interfaces Link1 and Link2, wherein the Link1 and Link2 are used for being cascaded with adjacent Battery Management Units (BMUs);

the patch panel is provided with two wire harnesses, each wire harness comprises 1 st cable to 8 th cable, as shown in fig. 2, the left side 1-8 and the right side 1-8 are marked on the inner sides of RJ45 interfaces, the left side 1-8 leads out one wire harness, the right side 1-8 leads out another wire harness, in fig. 2, the 1 st cable to the 8 th cable are sequentially arranged in each wire harness from left to right, on the first side (S1), the 1 st cable and the 2 nd cable in each wire harness are connected with a first terminal (A), the 3 rd cable and the 4 th cable in each wire harness are connected with a second terminal (B), the 5 th cable and the 6 th cable in each wire harness are connected with a third terminal (C), the 7 th cable and the 8 th cable in each wire harness are connected with a fourth terminal (D), on the second side (S2), the 1 st cable to the 8 th cable in each wire harness are sequentially connected with one RJ45 interface according to a preset wire sequence, the preset line sequence is orange white, orange, green white, blue white, green, brown white and brown, that is, 1 to 8 in fig. 2 are connected with the net lines of which the colors in the RJ45 interface are "orange white, orange, green white, blue white, green, brown white and brown" in sequence, which is also the net line sequence of the standard RJ45 interface.

As can be seen from fig. 2, the two RJ45 interfaces Link1 and Link2 in the present invention are equivalent to each other, and are equivalent to two RJ45 interfaces connected in parallel inside, so that the BMU external output portion only has two RJ45 interfaces Link1 and Link2, and the power supply portion and the communication portion are integrated into two RJ45 interfaces.

In the present embodiment, the RJ45 interface realizes cascade communication and power supply externally by using an industrial grade network cable (568B standard network cable) connection. As shown in fig. 3, with Link1 of one BMU as an input port and Link2 as an output port, BMU1 is cascaded with Link1 of BMU2 through Link2 and finally connected to Link1 of BMU n, so that communication and power supply with a Battery Management System (BMS) can be realized through Link2 of BMU n (or Link1 of BMU 1). As shown in fig. 1, a schematic diagram of the connection between the existing battery management system and the battery management unit is shown, wherein a plurality of BMUs are cascaded, and 4 connection lines are required between every two adjacent BMUs, as can be seen from the above description, the present invention discloses a first terminal-fourth terminal of a first side and two RJ45 interfaces of a second side, which can achieve the same effect as the cascade connection of a plurality of BMUs shown in fig. 1, and at the same time, can avoid the inconvenience caused by the need of connecting a plurality of connection lines in fig. 1.

In the above embodiments of the present invention, the connection of communication and power supply of a master-slave battery management system (BMS × 1+ BMU × N) can be realized through an industrial-grade common network cable. Through such external connection mode, can shorten artificial wiring and check-up time, the length of pencil on the keysets can be customized and with its standardization according to actual demand, the mechanized batch production of being convenient for, the utility model discloses during the use, its installation is convenient reliable, can reduce the cost of labor greatly.

In summary, the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and those of ordinary skill in the art should understand that modifications or equivalent substitutions made without departing from the spirit and scope of the present invention are within the protection scope of the present invention.

Claims

1. A lithium battery management system connector, comprising: a casing, set up in the first side and the second side of the relative both sides of casing and set up in the adapter plate of casing inside, wherein:

the first side is provided with four terminals including a first terminal, a second terminal, a third terminal, a fourth terminal and a fourth terminal, wherein the first terminal, the second terminal, the third terminal and the fourth terminal are respectively used for being connected with V-of a power supply wire bundle, CAN L of a communication wire bundle, CAN H of the communication wire bundle and V + of the power supply wire bundle of the battery management unit,