一种具有三电压输出的锂电电池包

Abstract

本实用新型涉及电池包技术领域，公开了一种具有三电压输出的锂电电池包，包括电池包本体、电池保护板、切换单元、控制单元，电池包本体包括第一电池组、第二电池组、第三电池组、第四电池组，切换单元包括第一切换开关、第二切换开关、第三切换开关、第四切换开关、第五切换开关、第六切换开关、第七切换开关、第八切换开关和第九切换开关。利用切换单元内的第一切换开关、第二切换开关、第三切换开关、第四切换开关、第五切换开关、第六切换开关、第七切换开关、第八切换开关和第九切换开关切换电路，从而进行电压切换以匹配外部设备，最终即可通过第一电池组、第二电池组、第三电池组、第四电池组实现三种电压输出。

Claims

1. A lithium battery pack with three voltage outputs, comprising a battery pack body (1), a battery protection board (2) with multiple voltage outputs, a switching unit (3) for switching the output voltage, and a control unit for communicating with external devices through communication and judging the type of external devices, characterized in that: The battery pack body (1) includes a first battery pack (11), a second battery pack (12), a third battery pack (13), and a fourth battery pack (14). The switching unit (3) includes a first switching switch (31), a second switching switch (32), a third switching switch (33), a fourth switching switch (34), a fifth switching switch (35), a sixth switching switch (36), a seventh switching switch (37), an eighth switching switch (38), and a ninth switching switch (39). When the type of external device matches the current output voltage of the battery pack, the battery pack maintains a constant output voltage. When the type of external device does not match the current output voltage of the battery pack, the battery pack switches the voltage through the switching unit (3) to match the external device; When the second switch (32), the fifth switch (35) and the eighth switch (38) are open, and the first switch (31), the third switch (33), the fourth switch (34), the sixth switch (36), the seventh switch (37) and the ninth switch (39) are closed, the first voltage value is output; When the second switch (32), the fourth switch (34), the sixth switch (36) and the eighth switch (38) are open, and the first switch (31), the third switch (33), the fifth switch (35), the seventh switch (37) and the ninth switch (39) are closed, the second voltage value is output. When the first switch (31), the third switch (33), the fourth switch (34), the sixth switch (36), the seventh switch (37) and the ninth switch (39) are open, and the second switch (32), the fifth switch (35) and the eighth switch (38) are closed, the third voltage value is output.

2. The lithium battery pack with three voltage outputs of claim 1, wherein: External devices include chargers or working devices that use battery packs.

3. The lithium battery pack with three voltage outputs of claim 1, wherein: The first battery pack (11), the second battery pack (12), the third battery pack (13), and the fourth battery pack (14) are all composed of multiple batteries connected in series.

4. The lithium battery pack with three voltage outputs of claim 3, wherein: The first battery pack (11), the second battery pack (12), the third battery pack (13), and the fourth battery pack (14) are all provided with grid plates (4) on both sides. The grid plates (4) are integrally provided with positioning sleeves (41) for the battery ends to be embedded. The grid plates (4) are provided with multiple splicing components (5) on their peripheral side edges. The splicing components (5) include dovetail grooves (51) opened on the side edge of the grid plates (4) and dovetail blocks (52) for being embedded in the dovetail grooves (51).

5. The lithium battery pack with three voltage outputs of claim 4, wherein: The first battery pack (11), the second battery pack (12), the third battery pack (13), and the fourth battery pack (14) have hollow sections in the middle.

6. The lithium battery pack with three voltage outputs of claim 5, wherein: A cooling fan (6) is installed inside the hollow section.

7. The lithium battery pack with three voltage outputs of claim 3, wherein: Multiple sets of connectors (7) for connecting the two grid plates (4) located at both ends of the battery are provided between the grid plates (4). The connectors (7) include a first connecting sleeve (71) provided on one side of the grid plate (4), a second connecting sleeve (72) provided on the other side of the grid plate (4), an internal threaded sleeve (73) provided at the end of the first connecting sleeve (71), a positioning ring (74) provided on the inner wall of the second connecting sleeve (72) and abutting against the end face of the internal threaded sleeve (73), and a connecting bolt (75) threaded into the internal threaded sleeve (73) after passing through the positioning ring (74).

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