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CN-224217518-U - Battery management device and battery pack

CN224217518UCN 224217518 UCN224217518 UCN 224217518UCN-224217518-U

Abstract

The embodiment of the disclosure provides a battery management device and a battery pack, wherein the battery management device comprises a plurality of battery management units and a battery management unit, the plurality of battery management units are connected in series to form a battery core data transmission link, each two adjacent battery management units are connected in a daisy chain mode, two ends of each battery core data transmission link are respectively connected with the battery management unit in a daisy chain mode, each battery management unit comprises a wired communication connection port, the wired communication connection ports are used for being in wired communication connection with battery cores in a battery pack, and the battery management unit comprises a wireless communication connection port, and the wireless communication connection ports are used for being in wireless communication connection with an upper control system. The problem that the internal wiring harness of the battery pack of the pure wired communication battery management system is complex and the high-voltage safety coefficient is low can be solved, and meanwhile, the whole cost of the battery management system caused by adopting pure wireless communication is avoided.

Inventors

  • XU TONGHUI

Assignees

  • 欣捷安汽车电子有限公司

Dates

Publication Date
20260508
Application Date
20250530

Claims (10)

  1. 1. A battery management device for managing and controlling a battery pack is characterized by comprising a plurality of battery management units (11) and a battery management unit (12); the plurality of the electric core management units (11) are connected in series to form an electric core data transmission link, and every two adjacent electric core management units (11) are connected by adopting daisy chain communication; Both ends of the cell data transmission link are respectively connected with the battery management unit (12) in a communication way by adopting a daisy chain; Each battery management unit (11) comprises a wired communication connection port, and the wired communication connection ports are used for wired communication connection with the battery cells in the battery pack; The battery management unit (12) comprises a wireless communication connection port, and the wireless communication connection port is used for being in wireless communication connection with an upper control system for managing and controlling the battery management device.
  2. 2. The battery management device according to claim 1, wherein the battery management unit (11) comprises a slave acquisition chip (111) and a slave communication chip (112); The secondary acquisition chip (111) is in communication connection with the secondary communication chip (112); The secondary acquisition chip (111) comprises the wired communication connection port, and the wired communication connection port is used for wired communication connection with the data sampling sensor corresponding to the battery cell; The slave communication chip (112) comprises a data communication port, and the data communication port is used for being connected with the adjacent battery management unit (11) and/or the battery management unit (12).
  3. 3. The battery management apparatus according to claim 2, wherein: And the secondary acquisition chip (111) is in communication connection with the data sampling sensor corresponding to the battery cell by using an FPC or FFC.
  4. 4. The battery management device according to claim 2, wherein the battery management unit (11) further comprises a slave control chip (113); The slave control chip (113) is respectively connected with the slave acquisition chip (111) and the slave communication chip (112).
  5. 5. The battery management apparatus according to claim 2, wherein: The model number of the slave communication chip (112) is ADBMS1818 or MAX17841.
  6. 6. The battery management device according to claim 1, wherein the battery management unit (12) includes a first main communication chip (121), a second main communication chip (122), and a main control chip (124); the first main communication chip (121) is a daisy chain communication chip; The second main communication chip (122) is a wireless communication chip; The main control chip (124) is connected with the first main communication chip (121) and the second main communication chip (122) respectively.
  7. 7. The battery management apparatus according to claim 6, wherein the battery management unit (12) further includes a power supply conversion device (123); The power supply conversion device (123) is connected with the first main communication chip (121) and the second main communication chip (122), and the power supply conversion device (123) comprises a power supply port, and the power supply port is used for being connected with the battery pack.
  8. 8. The battery management apparatus according to claim 6, wherein: The first main communication chip (121) is in daisy-chain communication connection with the electric core management unit (11); the second main communication chip (122) is in wireless communication connection with the upper control system.
  9. 9. The battery management apparatus according to claim 6, wherein: The model of the first main communication chip (121) is LTC6820.
  10. 10. Battery pack, characterized by comprising a battery-driven device to which the battery pack corresponds and a battery management apparatus according to any one of claims 1-9, the battery management unit (12) being integrated in the battery-driven device.

Description

Battery management device and battery pack Technical Field The present application relates to the field of battery technologies, and in particular, to a battery management device and a battery pack. Background With the vigorous development of new energy industry, there are 400V platform and 800V platform high-voltage battery platforms at present, and the battery pack of these high-voltage platforms is usually formed by a plurality of battery cells according to the serial-parallel connection of rule, in order to guarantee the safe and reliable operation of the battery pack, it is necessary to use a battery management system to manage these battery cells that form the battery pack, and to monitor the voltage, temperature and loop current of each battery cell in real time. At present, in order to facilitate better management of single battery cells and good loop control of a battery pack by a battery management system, the battery management system can be divided into a centralized battery management system and a distributed battery management system according to application conditions of the battery management system, and in the battery management system of traditional application, more battery cell sampling wire harnesses and control connection wire harnesses exist in the whole battery pack, wherein high-voltage and low-voltage wire harnesses are mixed, so that serious challenges are brought to electrical safety. Disclosure of utility model Accordingly, the present application is directed to a battery management device and a battery pack, which can solve the problems of complex internal harness and low high-voltage safety coefficient of a battery pack of a pure wired communication battery management system, and avoid the increase of the overall cost of the battery management system caused by adopting pure wireless communication. In a first aspect, an embodiment of the present application provides a battery management apparatus, including a plurality of battery management units and a battery management unit; The plurality of the battery management units are connected in series to form a battery data transmission link, and every two adjacent battery management units are connected by adopting daisy chain communication; the two ends of the cell data transmission link are respectively connected with the battery management unit in a communication way by adopting a daisy chain; each battery cell management unit comprises a wired communication connection port, and the wired communication connection ports are used for wired communication connection with battery cells in the battery pack; The battery management unit comprises a wireless communication connection port, and the wireless communication connection port is used for being in wireless communication connection with an upper control system for managing and controlling the battery management device. With reference to the first aspect, the embodiment of the present application provides a first possible implementation manner of the first aspect, where the electrical core management unit includes a slave acquisition chip and a slave communication chip; The slave acquisition chip is in communication connection with the slave communication chip; The secondary acquisition chip comprises the wired communication connection port, and the wired communication connection port is used for wired communication connection with the data sampling sensor corresponding to the battery cell; The slave communication chip comprises a data communication port, and the data communication port is used for being connected with the adjacent battery management unit and/or the battery management unit. With reference to the first aspect, an embodiment of the present application provides a second possible implementation manner of the first aspect, where the slave acquisition chip and the data sampling sensor corresponding to the electrical core are connected by using a communication harness, where the communication harness includes an FPC flexible connector or an FFC flexible connector. With reference to the first aspect, the embodiment of the present application provides a third possible implementation manner of the first aspect, where the electrical core management unit further includes a slave control chip; the slave control chip is respectively connected with the slave acquisition chip and the slave communication chip. With reference to the first aspect, the embodiment of the present application provides a fourth possible implementation manner of the first aspect, where the battery management unit 12 includes a first main communication chip, a second main communication chip, and a main control chip; the first main communication chip is a daisy chain communication chip; the second main communication chip is a wireless communication chip; The main control chip is respectively connected with the first main communication chip and the second main communication chip. With reference to the first asp