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CN-224232690-U - Battery module, battery pack and electric equipment

CN224232690UCN 224232690 UCN224232690 UCN 224232690UCN-224232690-U

Abstract

The application discloses a battery module, a battery pack and electric equipment, which belong to the technical field of power batteries, wherein the battery module comprises a battery module main body, a first sampling assembly and a second sampling assembly, the battery module main body comprises a plurality of acquisition groups, each acquisition group comprises a first single battery and a second single battery, and the anode of the first single battery is connected in series with the cathode of the second single battery; the first sampling assembly comprises a first collecting plate and a plurality of first collecting units, the first collecting plate is arranged on one side of the battery module body, the negative electrodes of the first single batteries in each collecting group face the first collecting plate, the first collecting units are connected with the first collecting plate, the second sampling assembly and the first collecting plates are arranged on two sides of the battery module body, voltage signals of the serial connection positions of the first single batteries and the second single batteries are transmitted to the first collecting units by the second sampling assembly, and the collection of the two single batteries is achieved through one first collecting unit, so that the usage amount of the first collecting units is reduced.

Inventors

  • LIU XUEWEN

Assignees

  • 蜂巢能源科技股份有限公司

Dates

Publication Date
20260512
Application Date
20250411

Claims (10)

  1. 1. A battery module, comprising: The battery module body (100) comprises a plurality of acquisition groups (110) which are sequentially arranged along a first direction (X), wherein each acquisition group (110) comprises a first single battery (111) and a second single battery (112) which are alternately arranged at the positive and negative poles, and the positive pole of each first single battery (111) is connected with the negative pole of each second single battery (112) in series; The first sampling assembly (200) comprises a first collecting plate (210) and a plurality of first collecting units (220), wherein the first collecting plate (210) is arranged on one side of the battery module main body (100), and the cathodes of the first single batteries (111) in each collecting group (110) face the first collecting plate (210), and the first collecting units (220) are arranged on one side, away from the battery module main body (100), of the first collecting plate (210) and are connected with the first collecting plate (210); The second sampling assembly (300) is arranged on two sides of the battery module main body (100) opposite to the first collecting plate (210) along a second direction (Y), and the second sampling assembly (300) is configured to transmit voltage signals at the serial connection position of the first single battery (111) and the second single battery (112) in each collecting group (110) to the corresponding first collecting unit (220), and the second direction (Y) is intersected with the first direction (X).
  2. 2. The battery module according to claim 1, wherein a voltage signal at a position where the first unit cell (111) and the second unit cell (112) are connected in series, which is received by the first collecting unit (220), is V Total (S) , a voltage of the first unit cell (111) collected by the first collecting unit (220) is V 1 , and a voltage of the second unit cell (112) is V 2 , which satisfies V 2 ＝V Total (S) -V 1 .
  3. 3. The battery module of claim 1, wherein the first sampling assembly (200) further comprises: The first isolation plate (230) is arranged between the first collection plate (210) and the battery module main body (100) and is connected with the battery module main body (100), and the first collection plate (210) is arranged on the first isolation plate (230); The first tabs (240) are arranged on the first isolation plate (230) at intervals along the first direction (X), the first tabs (240) are connected with the first single batteries (111) or the second single batteries (112), and the first tabs (240) connected with the first single batteries (111) are also connected with the first collecting unit (220).
  4. 4. The battery module of claim 3, wherein the first sampling assembly (200) further comprises: a first negative electrode sampling nickel plate (250), which is connected to the first collecting plate (210), and the first tab (240) connected to the first unit cell (111) is connected to the first negative electrode sampling nickel plate (250); The first positive electrode sampling nickel sheet (260) is connected with the first collecting plate (210), and the first tab (240) connected with the second single battery (112) is connected with the first positive electrode sampling nickel sheet (260).
  5. 5. The battery module according to claim 4, wherein the first sampling assembly (200) further comprises a plurality of switching nickel plates (270), one end of each switching nickel plate (270) is connected with the housing of the first unit cell (111), and the other end is connected with one first collecting unit (220) through the first collecting plate (210).
  6. 6. The battery module according to claim 1, wherein the second sampling assembly (300) includes: the second collecting plates (310) are arranged on two sides of the battery module main body (100) opposite to the first collecting plates (210) along the second direction (Y); The second collecting plate (310) is arranged between the battery module main body (100) and connected with the battery module main body (100), and the second collecting plate (310) is arranged on the second separating plate (320); The second tabs (330) are arranged on the second isolation plate (320) at intervals along the first direction (X), and the second tabs (330) are connected with the first single battery (111) or the second single battery (112); A second positive electrode sampling nickel sheet (340), one end of which is connected with the second acquisition board (310) and the other end of which is connected with the second bar sheet (330); and one end of the equipotential nickel plate (350) is connected with the second acquisition plate (310), and the other end of the equipotential nickel plate is connected with the shell of the first single battery (111).
  7. 7. The battery module according to claim 6, wherein the battery module body (100) further includes a third unit cell (120), the third unit cell (120) and the plurality of collection groups (110) are all disposed along the first direction (X), and the plurality of collection groups (110) are all located at one side of the third unit cell (120); The first sampling assembly (200) further comprises a second acquisition unit (280) and a first adapter (290), wherein the second acquisition unit (280) is arranged on one side, away from the battery module main body (100), of the first acquisition plate (210) and is connected with the first acquisition plate (210), and the first adapter (290) is arranged on the first acquisition plate (210) and is connected with the first acquisition plate (210); The second sampling assembly (300) further comprises a second adapter (360), wherein the second adapter (360) is arranged on the second acquisition board (310) and is connected with the first adapter (290) through a wire (500).
  8. 8. The battery module of claim 1, further comprising two communication interfaces (400), both communication interfaces (400) being disposed on the first acquisition board (210).
  9. 9. A battery pack comprising the single cell according to any one of claims 1 to 8.
  10. 10. A powered device comprising a single cell as claimed in any one of claims 1 to 8 or comprising a battery pack as claimed in claim 9.

Description

Battery module, battery pack and electric equipment Technical Field The application belongs to the technical field of power batteries, and particularly relates to a battery module, a battery pack and electric equipment. Background The conventional sampling scheme of the existing battery pack is usually in a form of a centralized AFE (Analog Front End) mode, a board, a wire harness and an FPC (Flexible Printed Circuit, flexible printed circuit board), the battery pack is complex in sampling scheme, the wire harness is large in arrangement space occupation, only has functions of collecting voltage, temperature signals and balancing, and has no functions of measuring impedance of the battery core, and the like. The acquisition scheme of a single cell integrated chip is mentioned, the single acquisition chip can acquire the voltage and the temperature of a cell (the temperature sense is integrated in the chip) and has impedance measurement and equalization functions, the impedance monitoring function can monitor early thermal faults in the cell, alarm is faster than that of an NTC or a pressure sensor by a minute level, and the NTC can react with the actual temperature in the cell through impedance, and the temperature of a cell shell is measured by the NTC to react with the temperature of the cell to have hysteresis, so that the sampling scheme with the impedance measurement function can use the maximum allowable current higher than that of the NTC scheme during charging, thereby shortening the charging time. At present, some manufacturers have mass-produced vehicle-standard single-cell acquisition chips, and because the single chip manages one cell, the comprehensive cost is equivalent to that of the conventional acquisition scheme, and the cost is not reduced, so that the practical application and popularization are difficult. Disclosure of utility model The embodiment of the application provides a battery module, which aims to solve the technical problem that the cost of managing one battery cell by a single chip is high at present, and another purpose of the embodiment of the application is to provide a battery pack, and still another purpose of the embodiment of the application is to provide electric equipment. An embodiment of the present application provides a battery module including: The battery module comprises a battery module body and a plurality of battery modules, wherein the battery module body comprises a plurality of acquisition groups which are sequentially arranged along a first direction, each acquisition group comprises a first single battery and a second single battery, the positive electrodes of the first single batteries are staggered with the negative electrodes of the second single batteries, and the positive electrodes of the first single batteries are connected in series with the negative electrodes of the second single batteries; The first sampling assembly comprises a first collecting plate and a plurality of first collecting units, wherein the first collecting plate is arranged on one side of the battery module main body, and the cathodes of the first single batteries in each collecting group face the first collecting plate; The second sampling assembly is oppositely arranged on two sides of the battery module body along a second direction with the first collecting plate, and is configured to transmit voltage signals of the serial connection positions of the first single batteries and the second single batteries in each collecting group to the corresponding first collecting units, and the second direction is intersected with the first direction. In some embodiments, the voltage signal at the serial connection position of the first single battery and the second single battery, which is received by the first collecting unit, is V Total (S) , the voltage of the first single battery, which is collected by the first collecting unit, is V 1, and the voltage of the second single battery is V 2, which satisfies V 2＝V Total (S) -V1. In some embodiments, the first sampling assembly further comprises: The first isolation plate is arranged between the first acquisition plate and the battery module main body, is connected with the battery module main body and is arranged on the first isolation plate; The first tabs are arranged on the first isolation plate at intervals along the first direction, the first tabs are connected with the first single battery or the second single battery, and the first tabs connected with the first single battery are also connected with the first acquisition unit. In some embodiments, the first sampling assembly further comprises: The first negative electrode sampling nickel plate is connected with the first acquisition plate, and the first tab connected with the first single battery is connected with the first negative electrode sampling nickel plate; The first positive electrode sampling nickel sheet is connected with the first collecting plate, and the first ta