A bypass switching system

Abstract

The utility model relates to a bypass switching system, include: the first bypass switching unit and second bypass switching unit of series connection, the first bypass switching unit includes: first aluminum baseplate, first connection copper row, be used for controlling the first control unit of bypass switching of first battery to first radiator of heat dissipation of first aluminum baseplate, second bypass switching unit includes: second aluminum baseplate, second connection copper row, be used for controlling the second control unit of bypass switching of second battery to second radiator of heat dissipation of second aluminum baseplate, first radiator installs in the first side of first aluminum baseplate, second radiator installs in the third side of second aluminum baseplate, first negative pole connection copper row still with second level connection copper row of second bypass switching unit is connected, adopt the utility model, bypass switching system passes through the assembly mode of aluminum baseplate, radiator, copper row, supports through the big current at the same time, has further improved the heat dissipation effect.

Description

Technical Field

[0001] This utility model relates to the technical field of battery cell formation and capacity testing systems, and in particular to a bypass switching system. Background Technology

[0002] In traditional battery cell formation and capacity testing systems, the bypass switching units connected in series generate a lot of heat when high current is required. The PCB board of the bypass switching unit needs to be multi-layered, with a wide copper area and copper busbars soldered on the surface of the copper to enhance current carrying capacity and heat dissipation, thus ensuring the overcurrent capacity of the bypass unit board. However, increasing the width of the copper area and soldering copper busbars increases the PCB board area, resulting in a larger overall equipment volume and increased PCB board and equipment costs. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a bypass switching system, including a first bypass switching unit and a second bypass switching unit connected in series. The bypass switching system, by adopting an assembly method of aluminum substrate, heat sink and conductive copper busbar, supports the passage of large current while further improving the heat dissipation effect.

[0004] In a first aspect, this utility model provides a bypass switching system, comprising: a first bypass switching unit for bypassing a first battery and a second bypass switching unit for bypassing a second battery, wherein the first bypass switching unit and the second bypass switching unit are connected in series.

[0005] The first bypass switching unit includes: a first aluminum substrate, a first connecting copper busbar, a first control unit for controlling the bypass switching of the first battery, and a first heat sink for dissipating heat from the first aluminum substrate; the first connecting copper busbar includes: a first positive electrode connecting copper busbar, a first negative electrode connecting copper busbar, and a first cascaded copper busbar; the second bypass switching unit includes: a second aluminum substrate, a second connecting copper busbar, a second control unit for controlling the bypass switching of the second battery, and a second heat sink for dissipating heat from the second aluminum substrate; the second connecting copper busbar includes: a second positive electrode connecting copper busbar, a second negative electrode connecting copper busbar, and a second cascaded copper busbar;

[0006] The first heat sink is mounted on the first side of the first aluminum substrate, and the first control unit and the first connecting copper busbar are respectively mounted on the second side of the first aluminum substrate. The first side and the second side are opposite sides of the first aluminum substrate. The first cascaded copper busbar is connected to the first positive terminal connecting copper busbar through a first connection circuit on the second side of the first aluminum substrate. The first positive terminal connecting copper busbar is connected to the first positive terminal of the first battery, and the first negative terminal connecting copper busbar is connected to the first negative terminal of the first battery. The first negative terminal connecting copper busbar is also connected to the second cascaded copper busbar of the second bypass switching unit. The first cascaded copper busbar is also connected to the positive terminal of the power supply used to power the first battery and the second battery.

[0007] The second heat sink is mounted on the third side of the second aluminum substrate, and the second control unit and the second connecting copper busbar are respectively mounted on the fourth side of the second aluminum substrate. The third side and the fourth side are opposite sides of the second aluminum substrate. The second cascaded copper busbar is also connected to the second positive electrode connecting copper busbar through the second connecting circuit on the fourth side of the second aluminum substrate. The second positive electrode connecting copper busbar is also connected to the second positive electrode of the second battery, and the second negative electrode connecting copper busbar is connected to the second negative electrode of the second battery.

[0008] In conjunction with the first aspect, in one optional implementation, the second negative terminal connecting copper busbar is also connected to the negative terminal of the power supply.

[0009] In conjunction with the first aspect, in an optional embodiment, it further includes: a third bypass switching unit, which is connected in series with the first bypass switching unit and the second bypass switching unit. The third bypass switching unit includes: a third aluminum substrate, a third connecting copper busbar, a third control unit for controlling the bypass switching of the third battery, and a third heat sink. The third connecting copper busbar includes: a third positive electrode connecting copper busbar, a third negative electrode connecting copper busbar, and a third cascaded copper busbar. The third positive electrode connecting copper busbar, the third negative electrode connecting copper busbar, and the third cascaded copper busbar are all copper busbars.

[0010] The third heat sink is mounted on the fifth side of the third aluminum substrate, and the third control unit and the third connecting copper busbar are respectively mounted on the sixth side of the third aluminum substrate. The fifth and sixth sides are opposite sides of the third aluminum substrate.

[0011] The third cascaded copper busbar and the third positive terminal copper busbar are connected through the third connection circuit on the sixth side of the third aluminum substrate. The third positive terminal copper busbar is connected to the third positive terminal of the third battery, and the third negative terminal copper busbar is connected to the third negative terminal of the third battery. The third negative terminal copper busbar is also connected to the negative terminal of the power supply.

[0012] In conjunction with the first aspect, in an optional embodiment, a plurality of first preset surface mount MOSFETs and a plurality of first preset surface mount copper terminals with screw holes are also mounted on the second side of the first aluminum substrate, wherein the plurality of first preset surface mount MOSFETs and the plurality of first preset surface mount copper terminals with screw holes are electrically connected.

[0013] The first positive terminal connecting copper busbar, the first negative terminal connecting copper busbar, and the first cascade copper busbar each have multiple first preset holes. A first screw passing through the first hole is threaded into a screw hole on the first surface-mount copper terminal, so that the first positive terminal connecting copper busbar, the first negative terminal connecting copper busbar, and the first cascade copper busbar are electrically connected to the first surface-mount copper terminal; wherein...

[0014] The first hole is any one of a plurality of first preset holes, and the first surface mount copper terminal is any one of a plurality of first preset surface mount copper terminals.

[0015] In conjunction with the first aspect, in one optional embodiment, a plurality of second preset surface mount MOSFETs and a plurality of second preset surface mount copper terminals with screw holes are also mounted on the fourth side of the second aluminum substrate, wherein the plurality of second preset surface mount MOSFETs and the plurality of second preset surface mount copper terminals with screw holes are electrically connected.

[0016] The second positive terminal copper busbar, the second negative terminal copper busbar, and the second cascade copper busbar each have multiple pre-set holes. A second screw passing through the second holes is threaded into a screw hole on the second surface-mount copper terminal, so that the second positive terminal copper busbar, the second negative terminal copper busbar, and the second cascade copper busbar are electrically connected to the second surface-mount copper terminal.

[0017] The second hole is any one of the multiple second preset holes, and the second surface mount copper terminal is any one of the multiple second preset surface mount copper terminals.

[0018] In conjunction with the first aspect, in one optional embodiment, the first positive electrode is connected to a copper busbar, the first negative electrode is connected to a copper busbar, the first cascaded copper busbar, the second positive electrode is connected to a copper busbar, the second negative electrode is connected to a copper busbar, and the second cascaded copper busbar are all conductive copper busbars.

[0019] This utility model provides a bypass switching system, comprising: a first bypass switching unit and a second bypass switching unit connected in series. The first bypass switching unit includes: a first aluminum substrate, a first connecting copper busbar, a first control unit for controlling the bypass switching of a first battery, and a first heat sink for dissipating heat from the first aluminum substrate; the second bypass switching unit includes: a second aluminum substrate, a second connecting copper busbar, a second control unit for controlling the bypass switching of a second battery, and a second heat sink for dissipating heat from the second aluminum substrate; the first heat sink is mounted on a first side of the first aluminum substrate, the second heat sink is mounted on a third side of the second aluminum substrate, and the first negative connecting copper busbar is also connected to a second cascaded copper busbar of the second bypass switching unit; by adopting this utility model, the bypass switching system, through the assembly method of aluminum substrate, heat sink, and copper busbar, supports the passage of large current while further improving the heat dissipation effect. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a bypass switching system provided by this utility model;

[0022] Figure 2 This is a schematic diagram of another bypass switching system provided by this utility model;

[0023] Figure 3 This is a schematic diagram of another bypass switching system provided by this utility model;

[0024] Figure 4 This is a schematic diagram of another bypass switching system provided by this utility model;

[0025] Figure 5 This is a schematic diagram of another bypass switching system provided by this utility model;

[0026] Figure 6 This is a schematic diagram of the exploded structure of the first switching unit in the bypass switching system provided by this utility model;

[0027] 10-First bypass switching unit, 101-First cascaded copper busbar, 102-First positive terminal connection copper busbar, 103-First negative terminal connection copper busbar, 104-First control unit, 105-First aluminum substrate, 106-First heat sink, 107-First preset surface mount copper terminal, 1071-Screw hole, 108-First preset surface mount MOSFET, 109-First screw, 110-First preset hole, 20-Second bypass switching unit, 201-Second cascaded copper busbar, 2 02-Second positive copper busbar, 203-Second negative copper busbar, 204-Second control unit, 205-Second aluminum substrate, 206-Second heat sink, 30-Third bypass switching unit, 301-Third cascaded copper busbar, 302-Third positive copper busbar, 303-Third negative copper busbar, 40-Power supply, 401-Positive, 402-Negative, 50-Fourth bypass switching unit, 501-Third cascaded copper busbar, 503-Fourth negative connection terminal. Detailed Implementation

[0028] The technical solutions of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0029] It should be noted that the terms "first," "second," "third," "fourth," "fifth," and "sixth" in this utility model are only used to distinguish different connection terminals, holes, sides, aluminum substrates, MOS transistors, screws, bypass switching units, positive electrodes, negative electrodes, etc., and have no other meaning. They should not be used to limit the scope of protection of this utility model.

[0030] The appendix of this utility model can be combined with Figure 1-6 This utility model provides a bypass switching system, which may include, but is not limited to: a first bypass switching unit 10 for bypassing a first battery and a second bypass switching unit 20 for bypassing a second battery, wherein the first bypass switching unit 10 and the second bypass switching unit 20 are connected in series; wherein,

[0031] The first bypass switching unit 10 includes: a first aluminum substrate 105, a first connecting copper busbar, a first control unit 104 for controlling the bypass switching of the first battery, and a first heat sink 106; the first connecting copper busbar includes: a first positive electrode connecting copper busbar 102, a first negative electrode connecting copper busbar 103, and a first cascaded copper busbar 101.

[0032] The second bypass switching unit 20 includes: a second aluminum substrate 205, a second connecting copper busbar, a second control unit 204 for controlling the bypass switching of the second battery, and a second heat sink 206; the second connecting copper busbar includes: a second positive terminal connecting copper busbar 202, a second negative terminal connecting copper busbar 203, and a second cascaded copper busbar 201; wherein, the first positive terminal connecting copper busbar 102, the first negative terminal connecting copper busbar 103, and the first cascaded copper busbar 101 are all copper busbars, and the second positive terminal connecting copper busbar 202, the second negative terminal connecting copper busbar 203, and the second cascaded copper busbar 201 are also all copper busbars.

[0033] The first heat sink 106 is mounted on the first side of the first aluminum substrate 105. The first control unit 104 and the first connecting copper busbar are respectively mounted on the second side of the first aluminum substrate 105. The first side and the second side are opposite sides of the first aluminum substrate 105. The first cascaded copper busbar 101 and the first positive terminal connecting copper busbar 102 are connected through a first connecting circuit on the second side of the first aluminum substrate 105. The first positive terminal connecting copper busbar 102 is connected to the first positive terminal of the first battery. The first negative terminal connecting copper busbar 103 is connected to the first negative terminal of the first battery. The first negative terminal connecting copper busbar 102 is also connected to the second cascaded copper busbar 201 of the second bypass switching unit 20. The first cascaded copper busbar 101 is also connected to the positive terminal 401 of the power supply 40 used to supply power to the first battery and the second battery. The first connecting circuit can be a copper foil layer attached to the second side of the first aluminum substrate 105. The first cascaded copper busbar 101 can serve as the total positive terminal of the bypass switching system.

[0034] The second heat sink 206 is mounted on the third side of the second aluminum substrate 205. The second control unit 204 and the second connecting copper busbar are respectively mounted on the fourth side of the second aluminum substrate 205. The third side and the fourth side are opposite sides of the second aluminum substrate 205. The second cascaded copper busbar 201 is also connected to the second positive terminal connecting copper busbar 202 via a second connection circuit on the fourth side of the second aluminum substrate 205. The second positive terminal connecting copper busbar 202 is also connected to the second positive terminal of the second battery. The second negative terminal connecting copper busbar 203 is connected to the second negative terminal of the second battery. The second connection circuit can be a copper foil layer attached to the fourth side of the second aluminum substrate 205. It should be noted that the first connection circuit and the second connection circuit are... Figure 1 The specific locations shown are illustrated in the figures, and the corresponding locations in the other figures of this utility model will not be repeated.

[0035] It should be noted that the first bypass switching unit 10 is used to: when the first battery is fully charged, in order to prevent the first battery from being overcharged, bypass the first battery, that is, switch out the charging circuit for the first battery, that is, switch the charging circuit to stop charging the first battery.

[0036] It should be noted that the second bypass switching unit 20 is used to: when the second battery is fully charged, in order to prevent the second battery from being overcharged, bypass the second battery, that is, switch out the charging circuit for the second battery, that is, switch the charging circuit to stop charging the second battery.

[0037] It should be noted that the first bypass switching unit 10 and the second bypass switching unit 20 contain the same components and structures; the first positive electrode of the first battery can be the positive electrode of the first battery, and the first negative electrode of the first battery can be the negative electrode of the first battery; the second positive electrode of the second battery can be the positive electrode of the second battery, and the second negative electrode of the second battery can be the negative electrode of the second battery.

[0038] More specifically, a plurality of first preset surface mount MOSFETs 108 and a plurality of first preset surface mount copper terminals 107 respectively provided with screw holes 1071 are also mounted on the second side of the first aluminum substrate 105, wherein the plurality of first preset surface mount MOSFETs 108 and the plurality of first preset surface mount copper terminals 107 respectively provided with screw holes 1071 are electrically connected.

[0039] The first positive connecting copper busbar 102, the first negative connecting copper busbar 103, and the first cascaded copper busbar 101 each have multiple first preset holes 110. A first screw 109 passing through the first hole is threadedly connected to a screw hole on the first surface-mount copper terminal, so that the first positive connecting copper busbar 102, the first negative connecting copper busbar 103, and the first cascaded copper busbar 101 are electrically connected to the first surface-mount copper terminal; wherein...

[0040] The first hole is any one of the plurality of first preset holes 110, and the first surface mount copper terminal is any one of the plurality of first preset surface mount copper terminals 107.

[0041] More specifically, a plurality of second preset surface mount MOSFETs and a plurality of second preset surface mount copper terminals with screw holes are also mounted on the fourth side of the second aluminum substrate 205, wherein the plurality of second preset surface mount MOSFETs and the plurality of second preset surface mount copper terminals with screw holes are electrically connected.

[0042] The second positive terminal connecting copper busbar 202, the second negative terminal connecting copper busbar 203, and the second cascade copper busbar 201 are each provided with multiple second preset holes. A second screw passing through the second holes is threadedly connected to a screw hole on the second surface-mount copper terminal, so that the second positive terminal connecting copper busbar 202, the second negative terminal connecting copper busbar 203, and the second cascade copper busbar 201 are electrically connected to the second surface-mount copper terminal; wherein...

[0043] The second hole is any one of the multiple second preset holes, and the second surface mount copper terminal is any one of the multiple second preset surface mount copper terminals.

[0044] More specifically, the first positive terminal is connected to copper busbar 102, the first negative terminal is connected to copper busbar 103, the first cascaded copper busbar 101, the second positive terminal is connected to copper busbar 202, the second negative terminal is connected to copper busbar 203, and the second cascaded copper busbar 201 can all be conductive (capable of conducting large current) copper busbars.

[0045] It should be noted that the first control unit 104 is specifically used to: when the first battery is fully charged, to bypass the first battery and stop charging the first battery to prevent overcharging of the first battery;

[0046] The second control unit 204 is specifically used to: when it is determined that the second battery is fully charged, to bypass the second battery and stop charging the second battery to prevent overcharging of the second battery;

[0047] The third control unit is specifically used to: when it is determined that the third battery is fully charged, to bypass the third battery and stop charging the third battery to prevent overcharging.

[0048] Preferably, the second negative terminal connecting copper busbar 203 is also connected to the negative terminal 402 of the power supply 40. In this application scenario, the bypass switching system includes two bypass switching units, namely: a first bypass switching unit 10 and a second bypass switching unit 20. Specifically, the first cascaded copper busbar 101 of the first bypass switching unit 10 is connected to the positive terminal 401 of the power supply 40 used to supply power to the first and second batteries; the first negative terminal connecting copper busbar 103 of the first bypass switching unit 10 is connected to the second cascaded copper busbar 201 of the second bypass switching unit 20; and the second negative terminal connecting copper busbar 203 of the second bypass switching unit 20 is connected to the negative terminal 402 of the power supply 40. In this case, the second negative terminal connecting copper busbar 203 can serve as the total negative terminal of the bypass switching system.

[0049] Preferably, it further includes: a third bypass switching unit 30, which is connected in series with the first bypass switching unit 10 and the second bypass switching unit 20. The third bypass switching unit 30 includes: a third aluminum substrate, a third connecting copper busbar, a third control unit for controlling the bypass switching of the third battery, and a third heat sink. The third connecting copper busbar includes: a third positive electrode connecting copper busbar 302, a third negative electrode connecting copper busbar 303, and a third cascaded copper busbar 301. The third positive electrode connecting copper busbar 302, the third negative electrode connecting copper busbar 303, and the third cascaded copper busbar 301 are all copper busbars.

[0050] The third heat sink is mounted on the fifth side of the third aluminum substrate, and the third control unit and the third connecting copper busbar are respectively mounted on the sixth side of the third aluminum substrate. The fifth and sixth sides are opposite sides of the third aluminum substrate.

[0051] The third cascaded copper busbar 301 and the third positive terminal connecting copper busbar 302 are connected via a third connection circuit on the sixth side of the third aluminum substrate. The third positive terminal connecting copper busbar 302 is connected to the third positive terminal of the third battery, and the third negative terminal connecting copper busbar 303 is connected to the third negative terminal of the third battery. The third negative terminal connecting copper busbar 303 is also connected to the negative terminal 402 of the power supply 40. The third connection circuit can be a copper foil layer attached to the sixth side of the third aluminum substrate. It should be noted that the third positive terminal of the third battery can be the positive terminal of the third battery, and the third negative terminal of the third battery can be the negative terminal of the third battery.

[0052] When the switching bypass system includes only three bypass switching units, namely the first bypass switching unit 10, the second bypass switching unit 20, and the third bypass switching unit 30, the connection relationship of each bypass switching unit in the switching bypass system is as follows:

[0053] The first cascaded copper busbar 101 of the first bypass switching unit 10 is connected to the positive terminal 401 of the power supply 40 used to supply power to the first and second batteries. The first negative terminal connecting copper busbar 103 of the first bypass switching unit 10 is connected to the second cascaded copper busbar 201 of the second bypass switching unit 20. The second negative terminal connecting copper busbar 203 of the second bypass switching unit 20 is connected to the third cascaded copper busbar 301 of the third bypass switching unit 30. The third negative terminal connecting copper busbar 303 of the third bypass switching unit 30 is connected to the negative terminal 402 of the power supply 40. At this time, the third negative terminal connecting copper busbar 303 can be used as the total negative terminal of the bypass switching system.

[0054] When the switching bypass system includes four or more bypass switching units, namely the first bypass switching unit 10, the second bypass switching unit 20, and the third bypass switching unit 30, the connection relationship of each bypass switching unit in the switching bypass system is as follows:

[0055] The first cascaded copper busbar 101 of the first bypass switching unit 10 is connected to the positive terminal 401 of the power supply 40 used to power the first and second batteries. The first negative terminal connecting copper busbar 103 of the first bypass switching unit 10 is connected to the second cascaded copper busbar 201 of the second bypass switching unit 20. The second negative terminal connecting copper busbar 203 of the second bypass switching unit 20 is connected to the fourth cascaded copper busbar 501 of the fourth bypass switching unit 50. The fourth negative terminal connecting copper busbar 503 of the fourth bypass switching unit 50 is connected to the cascaded copper busbar of the next series-connected bypass switching unit (e.g., the third cascaded copper busbar 301). If the first bypass switching unit 10 is the first bypass switching unit in the bypass switching system, then the third bypass switching unit 30 is the last series-connected bypass switching unit in the bypass switching system. The third negative terminal connecting copper busbar 303 of the third bypass switching unit 30 is connected to the negative terminal 402 of the power supply 40. At this time, the third negative terminal connecting copper busbar 303 can be used as the total negative terminal of the bypass switching system.

[0056] It should be noted that the third bypass switching unit 30 is used to: when the third battery is fully charged, in order to prevent the third battery from being overcharged, bypass the third battery, that is, switch out the charging circuit for the third battery, that is, switch the charging circuit for the third battery to stop charging the third battery.

[0057] Figure 1-6 This is only used to illustrate the embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0058] The above are merely optional embodiments of this utility model and do not limit the patent scope of this utility model. All equivalent structural transformations made based on the contents of this utility model specification and drawings under the application concept of this utility model, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A bypass switching system, comprising: A first bypass switching unit (10) for switching the bypass of the first battery and a second bypass switching unit (20) for switching the bypass of the second battery, wherein the first bypass switching unit (10) and the second bypass switching unit (20) are connected in series, characterized in that, The first bypass switching unit (10) includes: a first aluminum substrate (105), a first connecting copper busbar, a first control unit (104) for controlling the bypass switching of the first battery, and a first heat sink (106) for dissipating heat from the first aluminum substrate (105); the first connecting copper busbar includes: a first positive electrode connecting copper busbar (102), a first negative electrode connecting copper busbar (103), and a first cascaded copper busbar (101); the second bypass switching unit (20) includes: a second aluminum substrate (205), a second connecting copper busbar, a second control unit (204) for controlling the bypass switching of the second battery, and a second heat sink (206) for dissipating heat from the second aluminum substrate (205); the second connecting copper busbar includes: a second positive electrode connecting copper busbar (202), a second negative electrode connecting copper busbar (203), and a second cascaded copper busbar (201); The first heat sink (106) is installed on the first side of the first aluminum substrate (105), the first control unit (104) and the first connecting copper busbar are respectively installed on the second side of the first aluminum substrate (105). The first side and the second side are opposite sides on the first aluminum substrate (105). The first cascaded copper busbar (101) and the first positive electrode connecting copper busbar (102) are connected through the first connecting circuit on the second side of the first aluminum substrate (105). The first positive electrode connecting copper busbar (102) is connected to the first positive electrode of the first battery. The first negative electrode connecting copper busbar (103) is connected to the first negative electrode of the first battery. The first negative electrode connecting copper busbar (103) is also connected to the second cascaded copper busbar (201) of the second bypass switching unit (20). The first cascaded copper busbar (101) is also connected to the positive electrode (401) of the power supply (40) used to supply power to the first battery and the second battery. The second heat sink (206) is mounted on the third side of the second aluminum substrate (205), and the second control unit (204) and the second connecting copper busbar are respectively mounted on the fourth side of the second aluminum substrate (205). The third side and the fourth side are opposite sides on the second aluminum substrate (205). The second cascaded copper busbar (201) is also connected to the second positive terminal connecting copper busbar (202) through the second connecting circuit on the fourth side of the second aluminum substrate (205). The second positive terminal connecting copper busbar (202) is also connected to the second positive terminal of the second battery. The second negative terminal connecting copper busbar (203) is connected to the second negative terminal of the second battery.

2. The bypass switching system as described in claim 1, characterized in that, The second negative terminal connecting copper busbar (203) is also connected to the negative terminal (402) of the power supply (40).

3. The bypass switching system as described in claim 1, characterized in that, It also includes: a third bypass switching unit (30), which is connected in series with the first bypass switching unit (10) and the second bypass switching unit (20). The third bypass switching unit (30) includes: a third aluminum substrate, a third connecting copper busbar, a third control unit for controlling the bypass switching of the third battery, and a third heat sink. The third connecting copper busbar includes: a third positive electrode connecting copper busbar (302), a third negative electrode connecting copper busbar (303), and a third cascaded copper busbar (301). The third positive electrode connecting copper busbar (302), the third negative electrode connecting copper busbar (303), and the third cascaded copper busbar (301) are all copper busbars. The third heat sink is mounted on the fifth side of the third aluminum substrate, and the third control unit and the third connecting copper busbar are respectively mounted on the sixth side of the third aluminum substrate. The fifth and sixth sides are opposite sides of the third aluminum substrate. The third cascaded copper busbar (301) and the third positive terminal connecting copper busbar (302) are connected through the third connection circuit on the sixth side of the third aluminum substrate. The third positive terminal connecting copper busbar (302) is connected to the third positive terminal of the third battery. The third negative terminal connecting copper busbar (303) is connected to the third negative terminal of the third battery. The third negative terminal connecting copper busbar (303) is also connected to the negative terminal (402) of the power supply (40).

4. The bypass switching system as described in claim 1, characterized in that, On the second side of the first aluminum substrate (105), a plurality of first preset surface mount MOSFETs (108) and a plurality of first preset surface mount copper terminals (107) with screw holes (1071) are also mounted, wherein the plurality of first preset surface mount MOSFETs (108) and the plurality of first preset surface mount copper terminals (107) with screw holes (1071) are electrically connected. The first positive connecting copper busbar (102), the first negative connecting copper busbar (103), and the first cascade copper busbar (101) are each provided with a plurality of first preset holes (110). A first screw (109) passing through the first hole is threadedly connected to a screw hole on the first surface-mount copper terminal, so that the first positive connecting copper busbar (102), the first negative connecting copper busbar (103), and the first cascade copper busbar (101) are electrically connected to the first surface-mount copper terminal respectively; wherein, The first hole is any one of the plurality of first preset holes (110), and the first patch copper terminal is any one of the plurality of first preset patch copper terminals (107).

5. The bypass switching system as described in claim 1, characterized in that, On the fourth side of the second aluminum substrate (205), a plurality of second preset surface mount MOSFETs and a plurality of second preset surface mount copper terminals with screw holes are also mounted, wherein the plurality of second preset surface mount MOSFETs and the plurality of second preset surface mount copper terminals with screw holes are electrically connected. The second positive connecting copper busbar (202), the second negative connecting copper busbar (203), and the second cascade copper busbar (201) are each provided with multiple second preset holes. A second screw passing through the second hole is threadedly connected to a screw hole on the second surface-mount copper terminal, so that the second positive connecting copper busbar (202), the second negative connecting copper busbar (203), and the second cascade copper busbar (201) are electrically connected to the second surface-mount copper terminal, respectively; wherein, The second hole is any one of the multiple second preset holes, and the second surface mount copper terminal is any one of the multiple second preset surface mount copper terminals.

6. The bypass switching system as described in claim 1, characterized in that, The first positive electrode is connected to the copper busbar (102), the first negative electrode is connected to the copper busbar (103), the first cascaded copper busbar (101), the second positive electrode is connected to the copper busbar (202), the second negative electrode is connected to the copper busbar (203), and the second cascaded copper busbar (201) are all conductive copper busbars.

Images