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CN-121983688-A - Battery module information acquisition integration and structure integration method

CN121983688ACN 121983688 ACN121983688 ACN 121983688ACN-121983688-A

Abstract

The invention relates to the technical field of lithium batteries, in particular to a battery module information acquisition integration and structure integration method, which comprises a module injection molding piece and an FPC acquisition circuit board, wherein the module injection molding piece comprises a lower injection molding piece, an upper injection molding piece and a battery module, the FPC acquisition circuit board comprises a lower FPC welding nickel strap and an upper FPC welding nickel strap, and a temperature sensor and a voltage sensor are electrically connected to the FPC acquisition circuit board. The battery module is integrally formed, the space utilization rate is improved, the mold opening cost is reduced by the upper layer injection molding piece and the lower layer injection molding piece, the production cost is reduced, the use of materials is reduced by using the integrated FPC acquisition circuit board, the welding is more convenient and quick, the production efficiency is improved, the wiring is more convenient and quick, the appearance is more attractive, the operation state of heating and radiating equipment is regulated by the temperature regulating mechanism, and the safe and stable operation of the battery module is ensured.

Inventors

  • ZHAO YONGGANG
  • ZHAO JIANGANG
  • JI YUPENG
  • ZHANG SHUO

Assignees

  • 山东航天威能科技有限公司

Dates

Publication Date
20260505
Application Date
20260106

Claims (10)

  1. 1. The battery module information acquisition integration and structure integration method comprises a module injection molding piece (1) and an FPC acquisition circuit board (2) arranged on the outer side face of the module injection molding piece (1), and is characterized in that the module injection molding piece (1) comprises a lower injection molding piece (101) and an upper injection molding piece (102), a battery module (10) is arranged between the lower injection molding piece (101) and the upper injection molding piece (102), and the battery module (10) is connected by using a module welding belt (501) in a welding mode according to a serial-parallel connection relation, and the battery module (10) comprises a plurality of 26650 electric cores (11); corresponding battery core mould grooves (103) are formed in the side surfaces, close to the lower injection molding piece (101) and the upper injection molding piece (102), of the battery cores (11) of the 26650 are uniformly arranged in the module injection molding piece (1); Twelve 26650 electric cores (11) are arranged in the length direction, eight 26650 electric cores (11) are arranged and fixed in the width direction, and the battery module (10) aggregate of four three-eight strings is formed, so that a three-twelve-string electric core structure is formed; The FPC gathers circuit board (2) including lower floor's FPC welding nickel strap (201) and upper strata FPC welding nickel strap (202), lower floor's FPC welding nickel strap (201) with upper strata FPC welding nickel strap (202) all designs to four way collection structure, electric connection has temperature sensor (3) and voltage sensor (4) on FPC gathers circuit board (2), temperature sensor (3) with voltage sensor (4) are used for gathering temperature, the voltage information of three eight strings of monomer electric cores.
  2. 2. The method for integrating information collection and structure integration of a battery module according to claim 1, wherein one end of the lower-layer FPC welding nickel strap (201) and one end of the upper-layer FPC welding nickel strap (202) are connected with an FPC collection wire connector (204) through an electrical connection piece (203), the electrical connection piece (203) is fixedly connected to the lower injection molding piece (101) or the upper injection molding piece (102) through a patch cord screw (205), and threaded sleeves are riveted on the lower injection molding piece (101) and the upper injection molding piece (102) in advance; The lower-layer FPC welding nickel strap (201) is fixed on the lower side face of the lower injection molding piece (101), and the upper-layer FPC welding nickel strap (202) is fixed on the upper side face of the upper injection molding piece (102).
  3. 3. The method for information collection, integration and structure integration of a battery module according to claim 1, wherein the lower layer FPC welding nickel strap (201) and the upper layer FPC welding nickel strap (202) are electrically connected with the module welding strap (501) through resistance welding and are fixed on the upper side surface and the lower side surface of the battery module (10).
  4. 4. The method for integrating information collection and structure integration of a battery module according to claim 1, wherein a terminal groove (106) is formed in the lower injection molding piece (101), a total negative wire harness terminal (502) and a total positive wire harness terminal (503) are arranged on the terminal groove (106), and the total negative wire harness terminal (502) and the total positive wire harness terminal (503) are fixedly connected with the module welding strip (501) through terminal bolts (7) and fixedly arranged on the terminal groove (106).
  5. 5. The method for integrating information collection and structure integration of a battery module according to claim 1, wherein a plurality of corresponding counter bores (104) are formed in the lower injection molding piece (101) and the upper injection molding piece (102), a long screw (6) is arranged in the counter bores (104), and the long screw (6) is used for fixing the lower injection molding piece (101) and the upper injection molding piece (102).
  6. 6. The method for integrating information collection and structure integration of a battery module according to claim 1, wherein connecting row fixing holes (108) are formed in four corners of the lower injection molding piece (101) and the upper injection molding piece (102), stainless steel connecting rows (601) are fixedly arranged in the connecting row fixing holes (108), and the stainless steel connecting rows (601) are fixedly arranged in the connecting row fixing holes (108) through connecting row screws (602).
  7. 7. The method for integrating information collection and structure integration of a battery module according to claim 1, wherein the outer side faces of the battery cell die grooves (103) are fixedly provided with battery cell check blocks (107), and the two side faces of the 26650 battery cells (11) are abutted against the battery cell check blocks (107).
  8. 8. The method for information collection, integration and structural integration of a battery module according to claim 7, wherein a plurality of corresponding heat dissipation holes (109) are formed in the lower injection molding piece (101) and the upper injection molding piece (102), the heat dissipation holes (109) penetrate through the battery cell stop block (107), and a temperature adjusting mechanism (8) is arranged on the heat dissipation holes (109).
  9. 9. The method for integrating information collection and structure integration of a battery module according to claim 1, wherein the temperature adjusting mechanism (8) comprises a hollow cylinder (801), two ends of the hollow cylinder (801) are connected with hollow cylinder plug connectors (802), and the hollow cylinder plug connectors (802) are plugged into the heat dissipation holes (109); The inside of fretwork section of thick bamboo (801) is provided with symmetrically distributed's heating strip fixed plate (803), two fixedly between heating strip fixed plate (803) be provided with heating strip (804), the one end of fretwork section of thick bamboo (801) is fixed to be provided with fan (805), fan (805) with go up injection molding (102) corresponding, heating strip (804) with fan (805) with FPC gathers circuit board (2) electric connection.
  10. 10. The method for integrating information collection and structure integration of a battery module according to claim 1, wherein the outer side faces of the lower injection molding piece (101) and the upper injection molding piece (102) are respectively clamped with a partition board (5), the partition boards (5) are arranged between the FPC collection circuit board (2) and the module welding strip (501), and sealing plates (9) are fixedly arranged on the bottom side faces of the upper injection molding piece (102).

Description

Battery module information acquisition integration and structure integration method Technical Field The invention relates to information acquisition integration and structure, in particular to a battery module information acquisition integration and structure integration method, and belongs to the technical field of lithium batteries. Background The 26650 electric core battery module on the market at present adopts through FPC gathers, transmits battery cell voltage, battery cell temperature information to the slave control more, and every battery module uses two FPC, uses aluminium row series connection mode to connect between the battery module, constitutes and reaches voltage and capacity platform that meets the requirements. The series connection mode between the modules is used, gaps are reserved when the battery modules are connected in series, each module is provided with 2 FPC, the problems that the space utilization rate of the battery modules is high and the outgoing lines are few cannot be solved, and the number of wire harnesses in the power battery modules is large and disordered, or a large amount of space is occupied. If the power battery system is to ensure that the specified voltage and capacity are achieved, 26650 cells are used to form a 3-and-32-string battery module, the 3-and-32-string battery module is formed by connecting 4 3-and-8-string battery modules in series, each 3-and-8-string battery module is provided with two FPCs for collecting and transmitting temperature and voltage information of single batteries, gaps left among the battery modules increase the volume of the whole battery module and reduce the internal space utilization rate of the power battery system in a serial connection mode of the 4 battery modules, 2 FPCs are used for each battery module, and the total number of 8 FPCs is increased, so that the number of wire harnesses connected between the FPCs and the slave plates is increased along with the increase of the number. Therefore, there is a need for improvement in battery module information collection integration and structural integration to solve the above-mentioned problems. Disclosure of Invention The invention aims to provide an information acquisition integration and structure integration method for a battery module, which is characterized in that the battery module is integrally formed, the space utilization rate is improved, the mold opening cost is reduced by upper and lower injection molding pieces, the production cost is reduced, the use of materials is reduced by using an integrated FPC (flexible printed circuit) acquisition circuit board, the welding is more convenient and quick, the production efficiency is improved, the wiring is more convenient and quick, the appearance is more attractive, the operation state of heating and radiating equipment is regulated by a temperature regulating mechanism, and the safe and stable operation of the battery module is ensured. In order to achieve the above purpose, the main technical scheme adopted by the invention comprises the following steps: The battery module information acquisition integration and structure integration method comprises a module injection molding piece and an FPC acquisition circuit board arranged on the outer side face of the module injection molding piece, wherein the module injection molding piece comprises a lower injection molding piece and an upper injection molding piece, a battery module is arranged between the lower injection molding piece and the upper injection molding piece, the battery module is connected by using a module welding strip according to a serial-parallel connection relationship, and the battery module comprises a plurality of 26650 electric cores; corresponding battery core mould grooves are formed in the side surfaces, close to the lower injection molding piece and the upper injection molding piece, of the lower injection molding piece, and a plurality of 26650 battery cores are uniformly arranged in the module injection molding piece; twelve 26650 electric cores are arranged in the length direction, eight 26650 electric cores are arranged and fixed in the width direction, and four three-to-eight-string battery module assemblies are formed, so that a three-to-thirty-two-string electric core structure is formed; The FPC gathers the circuit board and includes lower floor's FPC welding nickel strap and upper strata FPC welding nickel strap, lower floor's FPC welding nickel strap with upper strata FPC welding nickel strap all designs into four-way collection structure, electric connection has temperature sensor and voltage sensor on the FPC gathers the circuit board, temperature sensor with voltage sensor is used for gathering temperature, the voltage information of three eight strings of monomer electric cores in parallel. Preferably, one ends of the lower-layer FPC welding nickel strap and the upper-layer FPC welding nickel strap are connected with an FPC acquisition