Battery pack power supply system

Abstract

The utility model provides a battery pack power supply system. The battery pack comprises a first battery cell group which comprises a first positive electrode and a first negative electrode; the second battery cell group comprises a second positive electrode and a second negative electrode; the plug pin comprises a first positive electrode connecting end, a first negative electrode connecting end and a connecting electrode connecting end; the first positive electrode connecting end comprises a first positive electrode connecting terminal connected with the second positive electrode and a second positive electrode connecting terminal connected with the first positive electrode; the first negative electrode connecting end comprises a first negative electrode connecting terminal connected with the first negative electrode and a second negative electrode connecting terminal connected with the second negative electrode; and the connecting electrode connecting end comprises a first connecting electrode connecting terminal connected with the second negative electrode and a second connecting electrode connecting terminal connected with the first positive electrode. According to the scheme of the utility model, flexible switching of voltage can be realized in the same battery pack, and various voltage requirements can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery pack power supply system. Background Art

[0002] With the rapid development of fields such as electronic devices, portable tools, and electric vehicles, the demand for battery packs is increasing continuously. As the core power component of these devices, the performance and function of the battery pack directly affect the operation efficiency of the devices and the user experience. However, traditional battery packs are usually designed to provide a single voltage output, which shows certain limitations in some application scenarios. For example, some multifunctional devices need to work in different working modes, and these modes may require different voltage supplies; or in some composite tools, different components require different working voltages. Summary of the Invention

[0003] In view of this, the embodiments of the present application are committed to providing a battery pack power supply system to solve the technical problem that voltage switching cannot be performed inside the same battery pack in the prior art, and the technical problem that various different voltage requirements cannot be met.

[0004] In a first aspect, the utility model provides a battery pack power supply system, including a battery pack, and the battery pack includes:

[0005] A first battery cell group, including a first positive electrode and a first negative electrode;

[0006] A second battery cell group, including a second positive electrode and a second negative electrode;

[0007] A pin, including a first positive electrode connection end, a first negative electrode connection end, and a connection pole connection end; the first positive electrode connection end includes a first positive electrode connection terminal connected to the second positive electrode and a second positive electrode connection terminal connected to the first positive electrode; the first negative electrode connection end includes a first negative electrode connection terminal connected to the first negative electrode and a second negative electrode connection terminal connected to the second negative electrode; the connection pole connection end includes a first connection pole connection terminal connected to the second negative electrode and a second connection pole connection terminal connected to the first positive electrode.

[0008] Optionally, the power supply system further includes:

[0009] A first socket, including a first socket positive terminal and a first socket negative terminal, and the first socket is configured to connect the first socket positive terminal to the first positive electrode connection terminal and the second positive electrode connection terminal respectively, and the first socket negative terminal to the first negative electrode connection terminal and the second negative electrode connection terminal respectively when the pin is inserted.

[0010] Optionally, the power supply system further includes:

[0011] The second socket, comprising a second socket positive terminal, a second socket negative terminal and a second socket connection terminal, is configured such that when the pin is inserted, the second socket positive terminal is connected to the first positive connection terminal, the second socket negative terminal is connected to the first negative connection terminal, and the second socket connection terminal is respectively connected to the first connection pole connection terminal and the second connection pole connection terminal.

[0012] Optionally, the first positive connection end, the first negative connection end and the connection pole connection end are distributed in parallel, and the first positive connection terminal and the second positive connection terminal are distributed front and back, the first negative connection terminal and the second negative connection terminal are distributed front and back, and the first connection pole connection terminal and the second connection pole connection terminal are distributed front and back.

[0013] Optionally, the pin further comprises:

[0014] A second positive connection end, configured to be connected to the first positive connection terminal;

[0015] A second negative connection end, configured to be connected to the first negative connection terminal.

[0016] Optionally, the power supply system further comprises:

[0017] A third socket, comprising a third socket positive terminal, a third socket negative terminal and a third socket push rod, is configured such that when the pin is inserted, the third socket positive terminal is connected to the second positive connection end, and the third socket negative terminal is connected to the second negative connection end;

[0018] A first rotary connection piece, which can be switched from an initial state to a first working state or a second working state; the initial state is a non-contact state, the first working state is to be respectively connected to the first connection pole connection terminal and the first negative connection terminal, and the second working state is to be respectively connected to the first positive connection terminal and the second connection pole connection terminal;

[0019] A first contact socket, configured to contact the third socket push rod when the third socket is inserted, and switch the first rotary connection piece to the first working state or the second working state.

[0020] Optionally, the power supply system further comprises:

[0021] The fourth socket includes a fourth socket positive terminal, a fourth socket negative terminal, and a fourth socket push rod. The fourth socket is configured such that when the pin is inserted, the fourth socket positive terminal is connected to the second positive connection terminal, the fourth socket negative terminal is connected to the second negative connection terminal, and the fourth socket push rod is connected to the first connection pole connection terminal and the second connection pole connection terminal respectively.

[0022] Optionally, the battery pack further includes:

[0023] The fifth socket includes a fifth socket positive terminal, a fifth socket negative terminal, and a fifth socket push rod. The fifth socket is configured such that when the pin is inserted, the fifth socket positive terminal is connected to the second positive connection terminal, and the fifth socket negative terminal is connected to the second negative connection terminal;

[0024] The second rotary connection piece is capable of switching from the initial state to a third working state or a fourth working state or a fifth working state; the third working state is being connected to the first positive connection terminal and the second connection pole connection terminal respectively, the fourth working state is being connected to the first connection pole connection terminal and the first negative connection terminal respectively, and the fifth working state is being connected to the first connection pole connection terminal and the second connection pole connection terminal respectively;

[0025] The voltage selection knob is set to be operable to cause the second rotary connection piece to switch to the third working state or the fourth working state when the fifth socket is inserted.

[0026] Optionally, the power supply system further includes:

[0027] The sixth socket includes a sixth socket positive terminal, a sixth socket negative terminal, and a sixth socket push rod. The sixth socket is configured such that when the pin is inserted, the sixth socket positive terminal is connected to the second positive connection terminal, and the sixth socket negative terminal is connected to the second negative connection terminal.

[0028] Optionally, the voltage selection knob is further set to be operable to cause the second rotary connection piece to switch to the fifth working state when the sixth socket inserts the pin.

[0029] According to the design solution of the present utility model, by connecting different connection terminals at different voltage requirements, the internal connection relationship is changed, realizing the switching between 20V voltage and 40V voltage, and solving the technical problem in the prior art that voltage cannot be flexibly switched within the same battery pack to meet various voltage requirements.

[0030] Further, when different sockets are inserted, different connection terminals are connected, and the rotary connecting piece inside the battery pack will also switch to the corresponding position, so that the touched terminals are connected to achieve automatic voltage switching. In addition, the voltage can also be switched by manually rotating the voltage selection knob to rotate the corresponding rotary connecting piece inside the battery pack.

[0031] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly and implement it according to the content of the specification, the following describes the preferred embodiments of the present invention in detail. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 Shows the internal structure diagram of the battery pack according to an embodiment of the present invention;

[0033] Figure 2 Shows the schematic structural diagram of the first socket according to an embodiment of the present invention;

[0034] Figure 3 Shows the structural diagram of the battery power supply system according to an embodiment of the present invention;

[0035] Figure 4 Shows the schematic structural diagram of the second socket according to an embodiment of the present invention;

[0036] Figure 5 Shows the structural diagram of the battery power supply system according to another embodiment of the present invention;

[0037] Figure 6 Shows the schematic structural diagram of the third socket according to another embodiment of the present invention;

[0038] Figure 7 Shows the connection relationship diagram of the internal terminals of the pin when the system power supply voltage is 20V according to an embodiment of the present invention;

[0039] Figure 8 Shows the connection relationship diagram of the internal terminals of the pin when the system power supply voltage is 20V according to another embodiment of the present invention;

[0040] Figure 9 Shows the schematic structural diagram of the fourth socket according to another embodiment of the present invention;

[0041] Figure 10 Shows the connection relationship diagram of the internal terminals of the pin when the system power supply voltage is 40V according to an embodiment of the present invention;

[0042] Figure 11 Shows the schematic structural diagram of the fifth socket according to another embodiment of the present invention;

[0043] Figure 12 A diagram showing the connection relationship between the internal terminals of the pins when the system power supply voltage is 20V according to another embodiment of the present invention is shown;

[0044] Figure 13 shows a schematic structural diagram of a sixth socket according to another embodiment of the present utility model;

[0045] Figure 14 The figure shows the connection relationship diagram of the internal terminals of the pins when the system power supply voltage is 40V according to another embodiment of the present invention. DETAILED DESCRIPTION

[0046] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It will be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some, rather than all, structures related to the present application are shown in the accompanying drawings. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0047] As used herein, the terms "comprise," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.

[0048] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0049] Example 1:

[0050] Figure 1 FIG1 shows the internal structure of a battery pack according to an embodiment of the present invention. Figure 1As shown, the battery pack 100 includes a first battery cell group 110, a second battery cell group 120, and pins 130. The first battery cell group 110 includes a first positive electrode 111 and a first negative electrode 112. The second battery cell group includes a second positive electrode 121 and a second negative electrode 122. The pins 130 include a first positive electrode connection end 131, a first negative electrode connection end 133, and a connection pole connection end 132 that are distributed in parallel. The first positive electrode connection end 131 includes a first positive electrode connection terminal 1311 and a second positive electrode connection terminal 1312 that are distributed front and back. The first negative electrode connection end 133 includes a first negative electrode connection terminal 1331 and a second negative electrode connection terminal 1332 that are distributed front and back. The connection pole connection end 132 includes a first connection pole connection terminal 1321 and a second connection pole connection terminal 1322 that are distributed front and back.

[0051] Specifically, the first positive electrode connection terminal 1311 is connected to the second positive electrode 121, and the second positive electrode connection terminal 1312 is connected to the first positive electrode 111. The first negative electrode connection terminal 1331 is connected to the first negative electrode 112, and the second negative electrode connection terminal 1332 is connected to the second negative electrode 122. The first connection pole connection terminal 1321 is connected to the second negative electrode 122, and the second connection pole connection terminal 1322 is connected to the first positive electrode 111. In one embodiment, the voltages of both the first battery cell group 110 and the second battery cell group 120 are 20V.

[0052] Figure 2 The schematic structural diagram of a first socket according to an embodiment of the present invention is shown, and this first socket is a 20V socket. Figure 3 The structural diagram of a battery power supply system according to an embodiment of the present invention is shown, and the supply voltage of this battery power supply system is 20V. As Figure 2 shown, the first socket 210 includes a first socket positive electrode end 211, a first socket signal electrode end 212, and a first socket negative electrode end 213. Combining Figure 3, a load 200 with a voltage requirement of 20V includes a first socket 210. When the first socket 210 is inserted into the pin 130, the positive terminal 211 of the first socket is respectively connected to the first positive connection terminal 1311 and the second positive connection terminal 1312, and the negative terminal 213 of the first socket is respectively connected to the first negative connection terminal 1331 and the second negative connection terminal 1332. At this time, the first positive electrode 111 is connected to the positive terminal 211 of the first socket through the second positive connection terminal 1312, and the first negative electrode 112 is connected to the negative terminal 213 of the first socket through the first negative connection terminal 1331, so that the first battery cell group 110 and the load 200 form a circuit to charge the load 200. In addition, it is also possible to connect the second positive electrode 121 to the first positive connection terminal 1311 and then to the positive terminal 211 of the first socket, and connect the second negative electrode 122 to the second negative connection terminal 1332 and then to the negative terminal 213 of the first socket, so that the second battery cell group 120 and the load 200 form a circuit to charge the load 200. The voltages of the above-mentioned first battery cell group 110 and second battery cell group 120 are both 20V and they are in a parallel state, so that a load with a voltage requirement of 20V can be powered.

[0053] Figure 4 The schematic structural diagram of a second socket according to an embodiment of the present invention is shown, and the second socket is a 40V socket. Figure 5 The structural diagram of a battery power supply system according to another embodiment of the present invention is shown, and the power supply voltage of the battery power supply system is 40V. As Figure 4 shown, the second socket 310 includes a second socket positive terminal 311, a second socket signal terminal 312, a second socket connection terminal 313, and a second socket negative terminal 314. Combining Figure 5, the load 300 with a voltage requirement of 40V includes a second socket 310. When the second socket 310 is inserted into the pin 130, the positive terminal 311 of the second socket is connected to the first positive connection terminal 1311, the negative terminal 314 of the second socket is connected to the first negative connection terminal 1331, and the connection end 313 of the second socket is respectively connected to the first connection pole connection terminal 1321 and the second connection pole connection terminal 1322. At this time, the second positive electrode 121 is connected to the positive terminal 311 of the second socket through the first positive connection terminal 1311, and the first negative electrode 112 is connected to the negative terminal 314 of the second socket through the first negative connection terminal 1331. At the same time, the connection end 313 of the second socket connects the first connection pole connection terminal 1321 and the second connection pole connection terminal 1322, so that the first positive electrode 111 is connected to the first connection pole connection terminal 1321 through the second connection pole connection terminal 1322 and then connected to the second negative electrode 122. The second positive electrode 121 of the second battery cell group 120 is finally connected to the first negative electrode 112 of the first battery cell group 110 through the load 300 to form a loop. At this time, the first battery cell group 110 and the second battery cell group 120 are connected in series through the connection end 313 of the second socket, and thus the load with a voltage requirement of 40V can be powered.

[0054] According to the embodiment of the present invention, by connecting different connection terminals at different voltage requirements, the internal connection relationship is changed, realizing the switching between 20V voltage and 40V voltage, and solving the technical problem in the prior art that the flexible switching of voltage cannot be achieved within the same battery pack to meet various voltage requirements.

[0055] Embodiment 2:

[0056] The difference between this Embodiment 2 and Embodiment 1 lies in the different sockets. Moreover, the battery pack power supply system of this embodiment adds a first contact socket 400, and the second positive connection end 134, the second negative connection end 135 and the first rotating connection piece 140 are added inside the battery pack. Figure 6 The schematic structural diagram of the third socket according to another embodiment of the present invention is shown. The third socket is a 20V socket. As Figure 6 shown, the third socket 410 includes a third socket positive terminal 411, a third socket signal terminal 412, a third socket push rod 413 and a third socket negative terminal 414. When the third socket 410 is inserted into the pin 130, the third socket positive terminal 411 is connected to the second positive connection end 134, the third socket negative terminal 414 is connected to the second negative connection end 135, and the third socket push rod 413 contacts the first contact socket 400. The first contact socket 400 is a 20V contact socket, which contacts the third socket push rod 413 and drives the first rotating connection piece 140 to switch to the first working state or the second working state.

[0057] Figure 7Shows the connection relationship diagram of the internal terminals of the pin when the system supply voltage is 20V according to an embodiment of the present invention. Figure 8 Shows the connection relationship diagram of the internal terminals of the pin when the system supply voltage is 20V according to another embodiment of the present invention. As Figure 7 shown, the second positive connection end 134 is connected to the first positive connection terminal 1311, and the second negative connection end 135 is connected to the first negative connection terminal 1331. After the first rotating connection piece 140 contacts the third push rod 413, it switches to the first working state and is respectively connected to the first connection pole connection terminal 1321 and the first negative connection terminal 1331. Refer to Figure 1 , the second positive electrode 121 of the second battery cell group 120 is connected to the first positive connection terminal 1311, and the second negative electrode 122 is connected to the first connection pole connection terminal 1321. From the above connection relationship, it can be seen that the second positive electrode 121 is connected to the second positive connection end 134 through the first positive connection terminal 1311 and is connected to the positive extreme 411 of the third socket; the second negative electrode 122 is connected to the first connection pole connection terminal 1321, then passes through the first rotating connection piece 140 and is connected to the first negative connection terminal 1331, and finally is connected to the second negative connection end 135 and is connected to the negative extreme 414 of the third socket, thereby forming a loop to supply power to a load with a voltage requirement of 20V. In addition, the first rotating connection piece 140 can also switch to the second working state after contacting the third push rod 413 and is respectively connected to the first positive connection terminals 1311 and 1322. As Figure 8 shown, the second positive connection end 134 is connected to 1311, is connected to the second connection pole connection terminal 1322 through the first rotating connection piece 140, and the second negative connection end 135 is connected to the first negative connection terminal 1331. At this time, the first positive electrode 111 is connected to the second connection pole connection terminal 1322, passes through the first rotating connection piece 140 and is connected to the first positive connection terminal 1311, is connected to the second positive connection end 134, and then is connected to the positive extreme 411 of the third socket; the first negative electrode 112 is connected to the second negative connection end 135 by being connected to the first negative connection terminal 1331, and then is connected to the negative extreme 414 of the third socket, thereby forming a loop to supply power to a load with a voltage requirement of 20V.

[0058] Figure 9 Shows a schematic structural diagram of a fourth socket according to another embodiment of the present invention, and this fourth socket is a 40V socket. Figure 10 Shows the connection relationship diagram of the internal terminals of the pin when the system supply voltage is 40V according to an embodiment of the present invention. As Figure 9As shown, the fourth socket 510 includes a fourth socket positive terminal 511, a fourth socket signal terminal 512, a fourth socket push rod 513, and a fourth socket negative terminal 514. When the fourth socket 510 is inserted into the pin 130, the fourth socket positive terminal 511 is connected to the second positive connection terminal 134, the fourth socket negative terminal 514 is connected to the second negative connection terminal 135, and the fourth socket push rod 513 is respectively connected to the first connection pole connection terminal 1321 and the second connection pole connection terminal 1322. The first contact socket 400 is a 20V contact socket, while the fourth socket 510 is a 40V socket, so it does not contact the first contact socket 400. At this time, the first rotating connection piece 140 is in the initial state, that is, the non-contact state, and is not connected to any terminal. Refer to Figure 10 and Figure 1 , when the fourth socket 510 is inserted into the pin 130, the second positive electrode 121 is connected to the second positive connection terminal 134 through the connection of the first positive connection terminal 1311, and then is connected to the fourth socket positive terminal 511; the first negative electrode 112 is connected to the second negative connection terminal 135 through the connection of the first negative connection terminal 1331, and then is connected to the fourth socket negative terminal 514; the second negative electrode 122 is connected to the first connection pole connection terminal 1321, the first positive electrode 111 is connected to the second connection pole connection terminal 1322, and the fourth socket push rod 513 is respectively connected to the first connection pole connection terminal 1321 and the second connection pole connection terminal 1322, so that the first battery cell group 110 and the second battery cell group 120 are connected in series to form a loop to supply power to a load with a voltage requirement of 40V.

[0059] Embodiment 3:

[0060] The difference between this Embodiment 3 and Embodiment 2 lies in that the sockets, sockets, and rotating connection pieces are different, and this Embodiment 3 adds a voltage selection button. Figure 11 The schematic structural diagram of the fifth socket according to another embodiment of the present invention is shown. The fifth socket is a 20V socket. As Figure 11 shown, the fifth socket 610 includes a fifth socket positive terminal 611, a fifth socket signal terminal 612, a fifth socket push rod 613, and a fifth socket negative terminal 614. When the fifth socket 610 is inserted into the pin 130, the fifth socket positive terminal 611 is connected to the second positive connection terminal 134, the fifth socket negative terminal 614 is connected to the second negative connection terminal 135, and the fifth socket push rod 613 contacts the 20V anti-misinsertion socket 500. The 20V anti-misinsertion socket 500 can only be matched with a 20V socket to prevent misinsertion of a 40V socket. Figure 12 The connection relationship diagram of the internal terminals of the pin when the system supply voltage is 20V according to another embodiment of the present invention is shown. As Figure 12As shown, the second rotary connection piece 150 is manually operable. When the fifth socket 610 is inserted into the pin 130, the second rotary connection piece 150 can be switched to the third working state by means of a voltage selection knob, that is, it is connected to the first positive connection terminal 1311 and the second connection pole connection terminal 1322 respectively. At this time, the connection relationship between the internal terminals of the battery pack is the same as that in Embodiment 2 Figure 8 and will not be elaborated here. In addition, when the fifth socket 610 is inserted into the pin 130, the second rotary connection piece 150 can also be switched to the fourth working state by means of a voltage selection knob, that is, it is connected to the first negative connection terminal 1331 and the first connection pole connection terminal 1321 respectively. At this time, the connection relationship between the internal terminals of the battery pack is the same as that in Embodiment 2 Figure 7 and will not be elaborated here.

[0061] Figure 13 Fig. shows a schematic structural diagram of a sixth socket according to another embodiment of the present invention. The sixth socket is a 40V socket. As Figure 13 shown, the sixth socket 710 includes a sixth socket positive terminal 711, a sixth socket signal terminal 712, a sixth socket push rod 713, and a sixth socket negative terminal 714. When the sixth socket 710 is inserted into the pin 130, the sixth socket positive terminal 711 is connected to the second positive connection end 134, the sixth socket negative terminal 714 is connected to the second negative connection end 135, and the sixth socket push rod 713 is in contact with the 40V anti-misinsertion socket 600. The 40V anti-misinsertion socket 600 can only be matched with a 40V socket to prevent misinsertion of a 20V socket. Figure 14 Fig. shows a connection relationship diagram of the internal terminals of the pin when the system supply voltage is 40V according to another embodiment of the present invention. As Figure 14 shown, when the sixth socket 710 is inserted into the pin 130, the second rotary connection piece 150 is switched to the fifth working state by means of a voltage selection knob, that is, it is connected to the first connection pole connection terminal 1321 and the second connection pole connection terminal 1322 respectively. At this time, the first connection pole connection terminal 1321 and the second connection pole connection terminal 1322 are connected through the second rotary connection piece 150, and the connection relationship between the internal terminals of the battery pack is the same as that in Embodiment 2 Figure 10 and will not be elaborated here.

[0062] In the solution of the embodiment of the present invention, when different sockets are inserted, different connection terminals are connected, and the rotary connection piece inside the battery pack will also be switched to the corresponding position, so that the touched terminals are connected to achieve automatic voltage switching. In addition, the corresponding rotary connection piece inside the battery pack can also be rotated manually by rotating the voltage selection knob to achieve voltage switching.

[0063] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0064] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A battery pack power supply system, characterized in that, including a battery pack, the battery pack comprising: a first battery cell group including a first positive electrode and a first negative electrode; a second battery cell group including a second positive electrode and a second negative electrode; a pin including a first positive electrode connection end, a first negative electrode connection end, and a connection pole connection end; the first positive electrode connection end includes a first positive electrode connection terminal connected to the second positive electrode and a second positive electrode connection terminal connected to the first positive electrode; the first negative electrode connection end includes a first negative electrode connection terminal connected to the first negative electrode and a second negative electrode connection terminal connected to the second negative electrode; the connection pole connection end includes a first connection pole connection terminal connected to the second negative electrode and a second connection pole connection terminal connected to the first positive electrode.

2. The battery pack power supply system according to claim 1, wherein The power supply system further includes: a first socket including a first socket positive terminal and a first socket negative terminal, the first socket being configured such that when the pin is inserted, the first socket positive terminal is respectively connected to the first positive electrode connection terminal and the second positive electrode connection terminal, and the first socket negative terminal is respectively connected to the first negative electrode connection terminal and the second negative electrode connection terminal.

3. The battery pack power supply system according to claim 1, wherein The power supply system further includes: a second socket including a second socket positive terminal, a second socket negative terminal, and a second socket connection end, the second socket being configured such that when the pin is inserted, the second socket positive terminal is connected to the first positive electrode connection terminal, the second socket negative terminal is connected to the first negative electrode connection terminal, and the second socket connection end is respectively connected to the first connection pole connection terminal and the second connection pole connection terminal.

4. The battery pack power supply system according to claim 1, characterized in that, The first positive electrode connection end, the first negative electrode connection end, and the connection pole connection end are distributed in parallel, and the first positive electrode connection terminal and the second positive electrode connection terminal are distributed front and back, the first negative electrode connection terminal and the second negative electrode connection terminal are distributed front and back, and the first connection pole connection terminal and the second connection pole connection terminal are distributed front and back.

5. The battery pack power supply system according to claim 1, characterized in that The pin further includes: a second positive electrode connection end configured to be connected to the first positive electrode connection terminal; a second negative electrode connection end configured to be connected to the first negative electrode connection terminal.

6. The battery pack power supply system according to claim 5, characterized in that The power supply system further includes: a third socket including a third socket positive terminal, a third socket negative terminal, and a third socket push rod, the third socket being configured such that when the pin is inserted, the third socket positive terminal is connected to the second positive electrode connection end, and the third socket negative terminal is connected to the second negative electrode connection end; a first rotary connection piece capable of switching from an initial state to a first working state or a second working state; the initial state is a non-contact state, the first working state is being respectively connected to the first connection pole connection terminal and the first negative electrode connection terminal, and the second working state is being respectively connected to the first positive electrode connection terminal and the second connection pole connection terminal; a first contact socket configured to contact the third socket push rod when the third socket is inserted, switching the first rotary connection piece to the first working state or the second working state.

7. The battery pack power supply system according to claim 6, wherein The power supply system further includes: The fourth socket includes a fourth socket positive terminal, a fourth socket negative terminal, and a fourth socket push rod. The fourth socket is configured such that when the pin is inserted, the fourth socket positive terminal is connected to the second positive connection terminal, the fourth socket negative terminal is connected to the second negative connection terminal, and the fourth socket push rod is connected to the first connection pole connection terminal and the second connection pole connection terminal respectively.

8. The battery pack power supply system according to claim 6, characterized in that, The battery pack further includes: A fifth socket, including a fifth socket positive terminal, a fifth socket negative terminal, and a fifth socket push rod. The fifth socket is configured such that when the pin is inserted, the fifth socket positive terminal is connected to the second positive connection terminal, and the fifth socket negative terminal is connected to the second negative connection terminal. A second rotary connecting piece that can be switched from the initial state to a third working state, a fourth working state, or a fifth working state. The third working state is to be connected to the first positive connection terminal and the second connection pole connection terminal respectively. The fourth working state is to be connected to the first connection pole connection terminal and the first negative connection terminal respectively. The fifth working state is to be connected to the first connection pole connection terminal and the second connection pole connection terminal respectively. A voltage selection button, which is set to be operable to cause the second rotary connecting piece to switch to the third working state or the fourth working state when the fifth socket is inserted.

9. The battery pack power supply system according to claim 8, wherein The power supply system further includes: A sixth socket, including a sixth socket positive terminal, a sixth socket negative terminal, and a sixth socket push rod. The sixth socket is configured such that when the pin is inserted, the sixth socket positive terminal is connected to the second positive connection terminal, and the sixth socket negative terminal is connected to the second negative connection terminal.

10. The battery pack power supply system according to claim 9, characterized in that, The voltage selection button is also set to be operable to cause the second rotary connecting piece to switch to the fifth working state when the sixth socket inserts the pin.

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