Multi-voltage output battery pack

Abstract

The utility model discloses a multi-voltage output battery pack which comprises a battery pack assembly, a first microswitch, a second microswitch, a third microswitch and a push block device are respectively arranged on the battery pack assembly, and a switch contact of the second microswitch is opposite to a switch contact of the third microswitch. The push block device is arranged between the second microswitch and the third microswitch, a switch contact of the first microswitch directly faces the push block device, the second microswitch and the third microswitch are initially in a normally closed state, and the first microswitch is initially in a normally open state; the component of the push block device moves towards the first microswitch and can trigger switch contacts of the first microswitch, the second microswitch and the third microswitch, so that the first microswitch is in a normally-closed state, and the second microswitch and the third microswitch are in a normally-open state. According to the invention, the traditional electrode terminal is replaced by the microswitch, so that the connection structure of the battery pack is simpler and more reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, and in particular to a multi-voltage output battery pack. Background Art

[0002] At present, multi-voltage or dual-voltage output battery packs on the market generally use mechanical structures and electrode terminals to achieve the series-parallel relationship of battery cells through combined connection, so as to achieve the purpose of outputting multiple voltages in the same battery pack. Although this type of battery pack can achieve the purpose of outputting multiple voltages, the electrode terminal structure is complex, the production process is cumbersome, and the cost is high; when conventional electrode terminals are connected in series and parallel, the current used in the entire battery pack will pass through the electrode terminals, causing the electrode terminals to heat up severely; in addition, the contact life of the traditional electrode terminals is short, and their mechanical wear and fatigue resistance can no longer meet the current market demand for high-current tools. Utility Model Content

[0003] To this end, an embodiment of the present invention provides a multi-voltage output battery pack to solve the problems raised by the above-mentioned background technology.

[0004] In order to achieve the above objectives, the embodiments of the present invention provide the following technical solutions:

[0005] A multi-voltage output battery pack includes a battery pack assembly, on which a first microswitch, a second microswitch, a third microswitch and a push block device are respectively arranged, the switch contact of the second microswitch is arranged opposite to the switch contact of the third microswitch, the push block device is arranged between the second microswitch and the third microswitch, the switch contact of the first microswitch is directly opposite to the push block device, the second microswitch and the third microswitch are initially in a normally closed state, and the first microswitch is initially in a normally open state; the component of the push block device moves toward the first microswitch to trigger the switch contacts of the first microswitch, the second microswitch and the third microswitch, so that the first microswitch is in a normally closed state, and the second microswitch and the third microswitch are in a normally open state.

[0006] Preferably, the pushing block device includes a base plate and a pushing block, the base plate is fixedly arranged on the battery pack assembly, two positioning grooves are arranged on the base plate, and two protrusions are arranged on the pushing block, the two protrusions are correspondingly matched in the two positioning grooves and can move along the positioning grooves.

[0007] Further preferably, a connecting hole is opened on the bottom plate, and a fixing screw is arranged in the connecting hole, and the fixing screw fixes the bottom plate to the battery pack assembly.

[0008] Further preferably, a spring is provided between the push block and the bottom plate.

[0009] Further preferably, a push rod is provided on a side of the push block close to the first micro switch, and the push rod is just opposite to the switch contact of the first micro switch.

[0010] Preferably, the first micro switch, the second micro switch and the third micro switch have the same structure.

[0011] Preferably, the distances between the second micro switch and the third micro switch and the block pushing device are equal.

[0012] Preferably, when the second microswitch and the third microswitch are both in the normally closed state and the first microswitch is in the normally open state, the voltage output by the battery pack is 20V; when the first microswitch is in the normally closed state and the second microswitch and the third microswitch are both in the normally open state, the voltage output by the battery pack is 40V.

[0013] Further preferably, the two side surfaces of the push block head are arranged to be inwardly inclined surfaces for matching with the second micro switch and the third micro switch.

[0014] Further preferably, the bottom plate is an "L"-shaped plate.

[0015] The present invention has at least the following beneficial effects:

[0016] In a multi-voltage output battery pack, the traditional electrode terminals are replaced by micro switches, making the connection structure of the battery pack simpler. At the same time, a push block device is used to control different micro switches, which is safe and reliable, and there is no mechanical wear and fatigue, which can extend the service life of the multi-voltage output battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly explain the prior art and the present invention, the following briefly introduces the drawings required for describing the prior art and the present invention. Obviously, the drawings described below are only exemplary, and for ordinary technicians in this field, other drawings can be derived from the provided drawings without creative work.

[0018] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them. They are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportion or adjustment of size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0019] Figure 1 It is a structural schematic diagram of a first state of a multi-voltage output battery pack involved in an embodiment of the utility model;

[0020] Figure 2 for Figure 1 State schematic diagram;

[0021] Figure 3 It is a structural schematic diagram of a second state of a multi-voltage output battery pack involved in an embodiment of the utility model;

[0022] Figure 4 for Figure 3 State schematic diagram;

[0023] Figure 5 An exploded diagram of a multi-voltage output battery pack according to an embodiment of the present utility model;

[0024] Description of reference numerals:

[0025] 1. Battery pack assembly; 2. First micro switch; 3. Second micro switch; 4. Third micro switch; 5. Push block device; 501. Bottom plate; 502. Push block; 503. Positioning groove; 504. Bump; 505. Connecting hole; 506. Fixing screw; 507. Spring; 508. Push rod. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0027] In the description of the present invention, unless otherwise specified, "plurality" means two or more. The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present invention and the above-mentioned drawings are intended to distinguish the objects referred to. For schemes with a sequential flow, this terminology does not have to be understood as describing a specific order or sequence. For schemes with device structures, this terminology does not distinguish between importance, positional relationships, etc.

[0028] In addition, the terms "comprises", "has" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that have been explicitly listed, but may also include other steps or units that are not explicitly listed but are inherent to these processes, methods, products or apparatuses, or steps or units that are added based on further optimization schemes conceived by the present invention.

[0029] See also Figure 1-Figure 5 The embodiment of the utility model provides a multi-voltage output battery pack, including a battery pack assembly 1, on which a first micro switch 2, a second micro switch 3, a third micro switch 4 and a push block device 5 are respectively arranged, the switch contact of the second micro switch 3 and the switch contact of the third micro switch 4 are arranged oppositely, the push block device 5 is arranged between the second micro switch 3 and the third micro switch 4, the switch contact of the first micro switch 2 is directly opposite to the push block device 5, the second micro switch 3 and the third micro switch 4 are initially in a normally closed state, and the first micro switch 2 is initially in a normally open state; the component of the push block device 5 moves toward the first micro switch 2 to trigger the switch contacts of the first micro switch 2, the second micro switch 3 and the third micro switch 4, so that the first micro switch 2 is in a normally closed state, and the second micro switch 3 and the third micro switch 4 are in a normally open state. In specific implementation, the multi-voltage output battery pack involved in the present invention has two states. The first state is: the push block device 5 is in the initial state, and the second micro switch 3 and the third micro switch 4 are in a normally closed state. The first micro switch 2 is in a normally open state. At this time, the two battery packs are in a parallel state. The second state is: under the thrust of the electrode holder, the components of the push block device 5 move toward the first micro switch 2, so that the push block device 5 contacts the switch contact of the first micro switch 2, so that the first micro switch 2 is in a normally closed state. At the same time, since the second micro switch 3 and the third micro switch 4 are also affected by the thrust of the push block device 5, the second micro switch 3 and the third micro switch 4 are in a normally open state. At this time, the two battery packs are in a series state.

[0030] Through the above structure and specific implementation process of the multi-voltage output battery pack, it can be seen that in the multi-voltage output battery pack, the traditional electrode terminals are replaced by micro switches, which makes the connection structure of the battery pack simpler. At the same time, the push block device 5 is used to control different micro switches, which is safe and reliable, and there is no mechanical wear and fatigue, which can make the service life of the multi-voltage output battery pack longer.

[0031] The pushing block device 5 includes a base plate 501 and a pushing block 502. The base plate 501 is fixedly arranged on the battery pack assembly 1. Two positioning grooves 503 are arranged on the base plate 501. Two protrusions 504 are arranged on the pushing block 502. The two protrusions 504 are correspondingly matched in the two positioning grooves 503 and can move along the positioning grooves 503. During specific implementation, the base plate 501 is limited on the battery pack assembly 1, and initially the push block 502 remains stationary, and the second microswitch 3 and the third microswitch 4 are in a normally closed state. At this time, there is no contact between the push block 502 and the first microswitch 2, and the first microswitch 2 is in a normally open state; when the battery pack needs to output another voltage, under the thrust of the electrode holder, the protrusion 504 of the push block 502 moves in the positioning groove 503 of the base plate 501 until it moves to the position where the push block 502 contacts the switch contact of the first microswitch 2 and triggers the switch contact, so that the first microswitch 2 is in a normally closed state. At the same time, due to the movement of the push block 502, the switch contacts of the second microswitch 3 and the third microswitch 4 are also affected by the thrust and are thus in a normally open state.

[0032] From the above structure and specific implementation process of the pushing block device 5, it can be known that a positioning groove 503 is provided on the bottom plate 501, and a protrusion 504 is provided on the pushing block 502, so that the protrusion 504 moves in the positioning groove 503, thereby ensuring the stability and reliability of the movement of the pushing block 502.

[0033] The bottom plate 501 is provided with a connection hole 505, in which a fixing screw 506 is arranged, and the battery pack assembly 1 is provided with a threaded hole, and the fixing screw 506 fixes the bottom plate 501 to the battery pack assembly 1. The threaded connection method is detachable while ensuring a firm connection.

[0034] In some embodiments, a spring 507 is disposed between the push block 502 and the bottom plate 501 .

[0035] A push rod 508 is provided on one side of the push block 502 close to the first micro switch 2, and the push rod 508 is just opposite to the switch contact of the first micro switch 2. By providing the push rod 508, it is beneficial for the switch contact of the first micro switch 2 to contact the push rod 508.

[0036] It should be noted that the first micro switch 2 , the second micro switch 3 , and the third micro switch 4 have the same structure.

[0037] The distances from the second micro switch 3 and the third micro switch 4 to the block pushing device 5 are equal.

[0038] When the second microswitch 3 and the third microswitch 4 are both in the normally closed state and the first microswitch 2 is in the normally open state, the voltage output by the battery pack is 20V; when the first microswitch 2 is in the normally closed state and the second microswitch 3 and the third microswitch 4 are both in the normally open state, the voltage output by the battery pack is 40V.

[0039] The two side surfaces of the head of the push block 502 are configured as inwardly inclined surfaces, which are used to match the second micro switch 3 and the third micro switch 4. Specifically, when the push block 502 moves toward the first micro switch 2, since the two side surfaces of the head of the push block 502 are configured as inwardly inclined surfaces, as the push block 502 moves, the distance between the push block 502 and the second micro switch 3 or the third micro switch 4 gradually decreases until the switch contacts of the second micro switch 3 and the switch contacts of the third micro switch 4 are triggered.

[0040] The bottom plate 501 is an L-shaped plate. The advantage of such arrangement is that, in the initial state, the two projections 504 will not slip out of the respective corresponding positioning grooves 503 .

[0041] The above specific embodiments may be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0042] The technical features of the above embodiments may be arbitrarily combined (as long as there is no contradiction in the combination of these technical features). To make the description concise, not all possible combinations of the technical features in the above embodiments are described; these embodiments that are not explicitly written should also be considered to be within the scope of this specification.

[0043] The present invention is described in more detail through general description and specific embodiments. It should be noted that, without departing from the concept of the present invention, it is obvious that several variations and improvements can be made to these specific embodiments, which all belong to the protection scope of this application. Therefore, the protection scope of the patent of this application shall be subject to the attached claims.

Claims

1. A multi-voltage output battery pack, characterized in that: The invention comprises a battery pack assembly (1), wherein the battery pack assembly (1) is respectively provided with a first micro switch (2), a second micro switch (3), a third micro switch (4) and a push block device (5), wherein the switch contact of the second micro switch (3) and the switch contact of the third micro switch (4) are arranged opposite to each other, the push block device (5) is arranged between the second micro switch (3) and the third micro switch (4), the switch contact of the first micro switch (2) is directly opposite to the push block device (5), the second micro switch (3) and the third micro switch (4) are initially in a normally closed state, and the first micro switch (2) is initially in a normally open state; the component of the push block device (5) moves toward the first micro switch (2) to trigger the switch contacts of the first micro switch (2), the second micro switch (3) and the third micro switch (4), so that the first micro switch (2) is in a normally closed state, and the second micro switch (3) and the third micro switch (4) are in a normally open state.

2. The multi-voltage output battery pack according to claim 1, characterized in that: The pushing block device (5) comprises a base plate (501) and a pushing block (502); the base plate (501) is fixedly arranged on the battery pack assembly (1); two positioning grooves (503) are arranged on the base plate (501); and two protrusions (504) are arranged on the pushing block (502); the two protrusions (504) are correspondingly matched in the two positioning grooves (503) and can move along the positioning grooves (503).

3. The multi-voltage output battery pack according to claim 2, characterized in that: The bottom plate (501) is provided with a connection hole (505), and a fixing screw (506) is arranged in the connection hole (505). The fixing screw (506) fixes the bottom plate (501) to the battery pack assembly (1).

4. The multi-voltage output battery pack according to claim 2, characterized in that: A spring (507) is provided between the push block (502) and the bottom plate (501).

5. The multi-voltage output battery pack according to claim 2, characterized in that: A push rod (508) is provided on one side of the push block (502) close to the first micro switch (2), and the push rod (508) is just opposite to the switch contact of the first micro switch (2).

6. The multi-voltage output battery pack according to claim 1, characterized in that: The first micro switch (2), the second micro switch (3) and the third micro switch (4) have the same structure.

7. The multi-voltage output battery pack according to claim 1, characterized in that: The distances between the second micro switch (3) and the third micro switch (4) and the block pushing device (5) are equal.

8. The multi-voltage output battery pack according to claim 1, characterized in that: When the second microswitch (3) and the third microswitch (4) are both in a normally closed state and the first microswitch (2) is in a normally open state, the voltage output by the battery pack is 20V; when the first microswitch (2) is in a normally closed state and the second microswitch (3) and the third microswitch (4) are both in a normally open state, the voltage output by the battery pack is 40V.

9. The multi-voltage output battery pack according to claim 2, characterized in that: The two side surfaces of the head of the push block (502) are arranged to be inwardly inclined surfaces, so as to be compatible with the second micro switch (3) and the third micro switch (4).

10. The multi-voltage output battery pack according to claim 2, characterized in that: The bottom plate (501) is an "L" shaped plate.

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