WO2024045590A1

WO2024045590A1 - Battery system and electric working machine

Info

Publication number: WO2024045590A1
Application number: PCT/CN2023/084436
Authority: WO
Inventors: 易小刚; 张星; 刘刚; 杨重
Original assignee: 三一锂能有限公司
Priority date: 2022-08-31
Filing date: 2023-03-28
Publication date: 2024-03-07
Also published as: CN218300111U

Abstract

The present application relates to the technical field of power batteries. Provided are a battery system and an electric working machine. The battery system comprises at least one box body of a layer, and bottom quick-plug connectors, top quick-plug connectors, a high voltage box, manual maintenance switches and a connecting wire group which are arranged in the box body. A battery cell module is arranged in the box body, and the manual maintenance switches comprise a first switch and a second switch. The connecting wire group is used for achieving the following connection functions: electrical connection between the high-voltage box and positive and negative electrodes of the bottom quick-plug connectors, positive and negative electrodes of the top quick-plug connectors as well as positive and negative electrodes of the battery cell module; and series connection between the first switch as well as the second switch and the battery cell module. By means of the bottom quick-plug connectors and the top quick-plug connectors, the battery system provided by the present application can achieve quick connection of circuits among battery systems when being connected to other battery systems, thus the required number of battery systems can be assembled according to actual working requirements.

Description

Battery systems and electric working machinery

Technical field

The present application relates to the field of power battery technology, and in particular to a battery system and electric working machinery.

Background technique

At present, electric working machinery (such as heavy trucks, mixers, dump trucks) mainly uses large-power battery assemblies. In some application scenarios, small-power battery systems can meet the usage needs. It can be seen that the battery system settings In order to be able to be assembled in a form, it is necessary to assemble the required number of battery systems according to actual work requirements.

Contents of the invention

This application provides a battery system and an electric working machine to solve the problem in the prior art that the circuit structure of the battery system cannot realize quick connection with other battery systems.

The present application provides a battery system, including: at least one layer of boxes, a bottom quick-plug connector, a top quick-plug connector, a high-voltage box, a manual maintenance switch and a connecting wire set provided in the box. The box is provided with Battery core module, the manual maintenance switch includes a first switch and a second switch; the connecting wire set is used to realize the following connection functions: the positive and negative poles of the high-voltage box and the bottom quick-plug connector, the top The electrical connection between the positive and negative poles of the quick-plug connector and the positive and negative poles of the battery module; and/or the series connection between the first switch and the second switch and the battery module.

According to a battery system provided by this application, the battery module includes two or more battery modules, and the connecting wire group is also used to realize the serial connection of each of the battery modules.

According to a battery system provided by the present application, the length direction of the battery module is parallel to the width direction of the box, and each battery module in the same box is arranged along the length direction of the box. .

According to a battery system provided by the present application, the top quick-plug connector is located in the middle of the length direction of the box; each of the battery modules in the same box as the top quick-plug connector is located along the The length direction of the box is symmetrically arranged on both sides of the top quick-plug plug.

According to a battery system provided by the present application, the bottom quick-plug connector is located in the middle of the length direction of the box, and each battery module in the same box as the bottom quick-plug connector is located along the The length direction of the box is symmetrically arranged on both sides of the bottom quick-plug connector.

According to a battery system provided by this application, the box includes a top box, a middle box and The bottom box, the top box, the middle box and the bottom box are stacked in sequence along the vertical direction, the top quick-plug connector is arranged on the top plate of the top box, and the bottom quick-plug connector is arranged on On the bottom plate of the bottom box, the high-voltage box and the manual maintenance switch are arranged on the side walls of the middle box.

According to a battery system provided by this application, a first installation box and a second installation box are provided on the side wall of the middle box, and the first installation box and the second installation box are located in the middle box. Inside, the high-voltage box is set in the first installation box, and the manual maintenance switch is set in the second installation box.

According to a battery system provided by this application, an operation window is provided on the side wall of the middle box, and a detachable door panel is provided at the operation window.

According to a battery system provided by this application, fixing holes and fixing ribs are respectively provided on the inner side walls and bottom plates of the top box, the middle box and the bottom box.

According to a battery system provided by the present application, the connecting wire group includes a first wire group, one end of the first wire group is connected to the high-voltage box, and the other end of the first wire group passes through the middle box The upper side of the battery module is connected to the positive and negative poles of the top quick-plug connector from the middle part of the middle box.

According to a battery system provided by the present application, the connecting wire group includes a second wire group, a first wiring hole is provided on the bottom plate of the middle box, one end of the second wire group is connected to the high-voltage box, and the After the other end of the second wire group passes through the first wiring hole, it extends through the lower side of the battery core module in the bottom box to the middle of the bottom box, and is quickly plugged into the bottom box. Connect the positive and negative poles of the connector.

According to a battery system provided by the present application, in the second wire group, an insulating plate is provided at least on a section below the cell module in the bottom box, and the insulating plate is provided on the The upper and lower sides of the second line group.

According to a battery system provided by this application, the connection line group includes a total positive connection line, a total negative connection line, a switch anode connection line, a switch cathode connection line and a multi-section series connection.

According to a battery system provided by this application, the high-voltage box is connected to the positive electrode of the battery module in the middle box through the total positive connection line, and is connected to the bottom box through the total negative connection line. The negative pole of the battery module in the battery module.

According to a battery system provided by the present application, the first switch is connected in series to the battery module in the bottom box and the battery module in the middle box through the switch anode connection line and the switch cathode connection line. between core modules.

According to a battery system provided by this application, the second switch is connected in series between the main positive connection line and the high-voltage box.

According to a battery system provided by the present application, there is a gap between each of the battery modules in the battery module, as well as between the battery module in the middle box and the battery module in the top box. are connected in series through the series wires.

According to a battery system provided by the present application, the connecting wire group includes a parallel wire group; there are two bottom quick-plug connectors and two top quick-plug connectors respectively, and between the two bottom quick-plug connectors and The two top quick-plug connectors are connected in parallel through the parallel wire set.

According to a battery system provided by the present application, at least some of the connecting wires in the connecting wire group adopt a copper bar structure.

This application also provides an electric working machine, including at least one of the above-mentioned battery systems.

In the battery system provided by this application, the high-voltage box is electrically connected to the battery module, the bottom quick-plug connector, and the top quick-plug connector through the connecting wire set, and is connected to other battery systems using the bottom quick-plug connector and the top quick-plug connector. At this time, the circuits between the battery systems can be quickly connected, and the required number of battery systems can be assembled according to actual operating requirements; in addition, the manual maintenance switch is connected in series with the battery module, and the power can be cut off through the manual maintenance switch operation to ensure safe use.

Furthermore, since the electric working machine provided by the present application is provided with the battery system as described above, it also has the advantages described above.

Description of drawings

In order to more clearly explain the embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description These are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is a schematic diagram of the overall structure of a battery system provided by the present application in one line of sight direction.

Figure 2 is a schematic diagram of the overall structure of a battery system provided by this application from another viewing direction.

Figure 3 is a schematic diagram of the overall structure of a battery system provided by this application from another viewing direction.

Figure 4 is one of the structural schematic diagrams of the cooperation between the connecting wire group and the battery module in a battery system provided by this application.

Figure 5 is the second structural schematic diagram of the cooperation between the connecting wire group and the battery module in a battery system provided by this application.

Figure 6 is a schematic structural diagram of a connecting wire group in a battery system provided by this application.

Figure 7 is a schematic structural diagram of the current direction in a battery system provided by the present application (the arrow in the figure The head indicates the direction of current flow).

Figure 8 is a schematic structural diagram of a top box in a battery system provided by this application.

Figure 9 is a schematic structural diagram of a top box in a battery system provided by this application.

Figure 10 is a schematic structural diagram of the middle top box of a battery system provided by this application.

Reference signs: 1. Top box; 2. Middle box; 3. Bottom box; 4. High voltage box; 5. First switch; 6. Second switch; 7. Battery module; 8. Bottom quick plug Connector; 9. Top quick-plug connector; 10. First line set; 11. Second line set; 12. Total positive connection line; 13. Total negative connection line; 14. Switch anode connection line; 15. Switch cathode connection line; 16. Series wiring; 17. Parallel wiring set; 18. First installation box; 19. Second installation box; 20. First threading hole; 21. Second threading hole; 22. Fixing hole; and 23. Fixing ribs .

Detailed ways

The embodiments of the present application will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the present application but cannot be used to limit the scope of the present application.

In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "horizontal", "upper", "lower", "front", "back", "left" and "right" The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing this document. The application embodiments and simplified descriptions do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as limiting the embodiments of the application. Furthermore, the terms “first”, “second” and “third” are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of this application, it should be noted that, unless otherwise clearly stated and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. Or integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood in specific situations.

In the embodiments of this application, unless otherwise expressly provided and limited, the first feature "on" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in intermediate contact. Indirect media contact. Furthermore, the terms "above", "above" and "above" the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "below" and "beneath" the first feature to the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "an example," "specific examples," or "some examples" or the like means that specific features are described in connection with the embodiment or example. , structures, materials or features are included in at least one embodiment or example of the embodiments of this application. In this specification, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification unless they are inconsistent with each other.

It is very necessary to set the battery system in a form that can be assembled. It is necessary to assemble the required number of battery systems according to actual work requirements. How to quickly connect the circuits between battery systems is a major problem. The circuit structure of the battery system is usually impossible to achieve. Quick connection to other battery systems.

The battery system of the embodiment of the present application will be described below with reference to Figures 1 to 10. The battery system of the embodiment of the present application can be used alone on electric working machinery such as heavy trucks, mixer trucks, dump trucks, etc., or it can also be used according to the needs of the working radius. After combining two or more battery systems, they are applied to electric working machinery.

The battery system in the embodiment of the present application includes at least one layer of boxes, and a bottom quick-plug connector 8, a top quick-plug connector 9, a high-voltage box 4, a manual maintenance switch and a connecting wire set provided in the box. A battery module 7 is provided in the box, and the battery module 7 is fixed in the box by, for example, clamping, bolting or bonding. The manual maintenance switch includes a first switch 5 and a second switch 6. Both the first switch 5 and the second switch 6 can function as power switch and short circuit protection.

The connecting wire set in the embodiment of the present application is used to realize the electrical connection between the high-voltage box 4 and the positive and negative poles of the bottom quick-plug connector 8, the positive and negative poles of the top quick-plug connector 9, and the positive and negative poles of the battery module 7; and The first switch 5 and the second switch 6 are connected in series with the battery module 7 .

It should be noted that the top quick-plug connector 9 in the embodiment of the present application is a male end for realizing circuit connection between battery systems, and the bottom quick-plug connector 8 is a female end for realizing circuit connection between battery systems. When two battery systems When making the connection, the top quick-connect connector 9 of the battery system located below can be inserted into the bottom quick-connect connector 8 of the battery system located above.

According to the battery system of the embodiment of the present application, the battery module 7 includes two or more battery modules, and the connecting wire group is also used to realize the serial connection of each battery module.

Optionally, the length direction of the battery module is parallel to the width direction of the box, and each battery module in the same box is arranged along the length direction of the box. In this embodiment, the top quick-plug connector 9 and the bottom quick-plug connector 8 are arranged in the middle of the length direction of the box, and each battery core in the same box as the top quick-plug connector 9 or the bottom quick-plug connector 8 The modules can be symmetrically arranged on both sides of the top quick-plug plug 9 and the bottom quick-plug connector 8 along the length direction of the box.

In some embodiments of the present application, the box includes a top box 1, a middle box 2, and a bottom box 3. The top box 1, the middle box 2, and the bottom box 3 are stacked in sequence in the vertical direction. It should be noted here that there is one top box 1 and one bottom box 3 each, and one or more middle boxes 2 can be provided as needed. In addition, since the top box 1 , the middle box 2 and the bottom box 3 are stacked, the middle box 2 and the bottom box 3 do not need to be provided with a top plate and adopt the form of openings on the upper side.

The top quick-plug connector 9 is arranged on the top plate of the top box 1 , the bottom quick-plug connector 8 is arranged on the bottom plate of the bottom box 3 , and the high-voltage box 4 and manual maintenance switch are arranged on the side wall of the middle box 2 . It can be understood that since the top quick-plug connector 9 needs to be plugged into the connectors of other battery systems, the top quick-plug connector 9 protrudes from the top plate of the top box 1, and the high-voltage box 4, manual maintenance switch and bottom quick-plug connector 8 needs to be installed inside the box to prevent it from protruding from the outer wall of the box and affecting the installation layout of the battery system.

Optionally, a first installation box 18 and a second installation box 19 are provided on the side wall of the middle box 2. The first installation box 18 and the second installation box 19 are located inside the middle box 2, and in the middle box. An operation window is provided on the side wall of 2, and a removable door panel is provided at the position of the operation window. The high-voltage box 4 is provided in the first installation box 18, and the manual maintenance switch is provided in the second installation box 19.

Optionally, the high-voltage box 4 and the manual maintenance switch are arranged at the end of the middle box 2, making the layout of the box more reasonable and forming a larger installation space inside.

At least some of the connecting lines in the connecting line set in the embodiment of the present application adopt a copper bar structure, which is easy to arrange and can occupy less space. The connection line group in the embodiment of the present application will be introduced in detail below.

In some embodiments of the present application, the connecting wire group includes a first wire group 10. The first wire group 10 is divided into two lines: cathode and anode. One end of the first wire group 10 is connected to the high-voltage box 4, and the other end passes through the intermediate box. The upper side of the battery module 7 in 2 is connected from the middle part of the middle box 2 to the positive and negative poles of the top quick-plug connector 9 to realize the electrical connection between the high-voltage box 4 and the top quick-plug connector 9 . It should be noted that the positive and negative connecting wires of the top quick-plug connector 9 extend to the middle of the bottom plate of the top box 1, and a connector is provided in the middle of the bottom plate of the top box 1 that penetrates the bottom plate of the top box 1. The first wire group 10. The connector can be directly connected to the upper middle position of the middle box 2. In this embodiment, since the connection line from the top quick-plug connector 9 to the bottom plate of the top box 1 will not interfere with the installation of the battery module 7, an ordinary cable structure can be used, and the first wire group 10 needs It passes through the side wall and top wall of the battery module 7, so it is preferably a copper bar structure.

Further, the connection line group also includes a second line group 11. The second line group 11 is divided into two lines, cathode and anode. A first threading hole 20 is provided on the bottom plate of the middle box 2. The first threading hole 20 is located in the middle box. The bottom plate of 2 is close to the high-voltage box 4. One end of the second wire group 11 is connected to the high-voltage box 4, and the other end passes through the first threading hole 20 and extends through the lower side of the battery module 7 in the bottom box 3 to the middle of the bottom box 3, and connected to the positive and negative poles of the bottom quick-plug connector 8. It should be noted that since the terminal of the bottom quick-plug connector 8 is located in the bottom box 3 , the second wire set 11 can be extended to the middle of the inner cavity of the bottom box 3 and directly connected to the bottom quick-plug connector 8 . For the same considerations as the first wire group 10 , to avoid the second wire group 11 from affecting the installation of the battery module 7 , and to reduce the occupied space, the second wire group 11 is preferably a copper bar structure.

Optionally, in the second wire group 11, an insulating plate is provided at least in the section located on the lower side of the battery core module 7 of the bottom box 3. The insulating plate is provided on the upper and lower sides of the second wire group 11. The insulating plate can be It is a PC board and can protect the second wire group 11.

According to the battery system of the embodiment of the present application, the connection line group also includes a total positive connection line 12, a total negative connection line 13, a switch anode connection line 14, a switch cathode connection line 15 and a multi-section series connection line 16.

The high-voltage box 4 is connected to the positive electrode of the battery core module 7 in the middle box 2 through the total positive connection line 12, and is connected to the battery core module 7 in the bottom box 3 through the total negative connection line 13 passing through the first wiring hole 20. 7 negative pole. The bottom plate of the middle box 2 is provided with a second threading hole 21 close to the first switch 5. The switch anode connecting wire 14 passes through the second threading hole 21. The first switch 5 passes through the switch anode connecting wire 14 and the switch cathode connecting wire. 15 is connected in series between the battery core module 7 in the bottom box 3 and the battery core module 7 in the middle box 2. The second switch 6 is connected in series between the main positive connection line 12 and the high-voltage box 4 . The battery modules in the battery module 7 and the battery module 7 in the middle box 2 and the battery module 7 in the top box 1 are connected in series through series wires 16 respectively.

To facilitate understanding, the specific connection forms of the high-voltage box 4, the cell module 7, the first switch 5 and the second switch 6 in the battery system are described in detail below. In the following description, the box (including the top box 1 , the middle part of the middle box 2 and the bottom box 3) is the dividing line. The half of the box close to the high-voltage box 4 is set to the left side of the box. Correspondingly, the half far away from the high-voltage box 4 is set to the right side of the box. .

The first switch 5 is located at the right end of the middle box 2 , and the second switch 6 is located at the left end of the middle box 2 . Each battery cell module in the bottom box 3 is connected in series from left to right through multi-section series wires 16. The battery module at the far left in the bottom box 3 is connected to the high-voltage box 4 through the total negative connecting wire 13 and is located at the rightmost end. The battery module is connected to the first switch 5 through the switch anode connection line 14, and the first switch 5 is connected to the battery module located at the rightmost end of the middle box 2 through the switch cathode connection line 15.

Each battery module located on the right side of the middle box 2 is connected in series from right to left through multi-section series wires 16 .

The battery module located on the right side of the top box 1 and close to the top quick-plug connector 9 is connected to the battery module located on the right side and close to the top quick-plug connector 9 in the middle box 2 through a series wire 16 and is located in the top box The battery modules on the right side of 1 are connected in series from left to right through multiple series wires 16; the battery module located at the rightmost end of the top box 1 is connected to the battery module located at the leftmost end of the top box 1 through a series wire 16. Each cell module on the left side of the top box 1 is connected through multi-segment series wiring 16 Connect in series from left to right. The battery module located on the left side and close to the top quick-plug connector 9 in the top box 1 is connected in series to the battery module located on the left side and close to the top quick-plug connector 9 in the middle box 2 through a section of series wire 16 . Each cell module located on the left side of the middle box 2 is connected in series from right to left through multi-section series wires 16 . The high-voltage box 4 is connected to one end of the main positive connection line 12 through the second switch 6 , and the other end of the main positive connection line 12 is connected to the leftmost cell module in the middle box 2 .

It can be seen from the above description that in the embodiment of the present application, the connection of the high-voltage box 4, the first switch 5, the second switch 6 and the battery module 7 is realized through reasonable circuit layout, and the structure is compact. And it can make the battery system have higher safety.

According to the battery system of the embodiment of the present application, the connecting wire group also includes a parallel wire group 17. There are two bottom quick-plug connectors 8 and two top quick-plug connectors 9 respectively. Between the two bottom quick-plug connectors 8 and the two top quick-plug connectors The plug connectors 9 are connected in parallel via a parallel line set 17 . Specifically, the parallel wire set 17 includes four sections of connecting wires, respectively realizing the connection between the positive poles and the negative poles of the two bottom quick-plug connectors 8 and the connection between the positive poles and the negative poles of the two top quick-plug connectors 9 .

In some embodiments of the present application, fixing holes 22 and fixing ribs 23 are respectively provided on the inner walls and bottom plates of the top box 1, the middle box 2 and the bottom box 3 for fixing the connecting wire group. Further increase the structural stability and use safety of the battery system.

An embodiment of the present application also provides an electric working machine, including at least one of the above-mentioned battery systems. The electric working machine in the embodiment of the present application can be, for example, a heavy truck, a mixer truck, a dump truck, etc., and is not specifically limited here.

The battery system and electric working machinery of the embodiment of the present application can realize quick connection of circuits between battery systems, and have the advantages of reasonable layout, stable structure, and safe use.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent substitutions are made to some of the technical features; however, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions in the embodiments of the present application.

Claims

A battery system, characterized in that it includes: at least one layer of boxes and a bottom quick-plug connector, a top quick-plug connector, a high-voltage box, a manual maintenance switch and a connecting wire set provided in the box. There is a battery module, and the manual maintenance switch includes a first switch and a second switch;

The connecting wire set is used to realize the following connection functions: the positive and negative poles of the high-voltage box and the bottom quick-plug connector, the positive and negative poles of the top quick-plug connector, and the positive and negative poles of the battery module. Electrical connection; and/or series connection between the first switch, the second switch and the battery module.
The battery system according to claim 1, wherein the battery cell module includes two or more battery cell modules, and the connecting wire group is also used to realize the serial connection of each of the battery cell modules.
The battery system according to claim 2, wherein the length direction of the battery module is parallel to the width direction of the box, and each battery module in the same box is along the length direction of the box. Arranged lengthwise.
The battery system according to claim 2 or 3, characterized in that the top quick-plug connector is located in the middle of the length direction of the box; and the top quick-plug connector is located in the same box as the top quick-plug connector. The battery core modules are symmetrically arranged on both sides of the top quick-plug plug along the length direction of the box.
The battery system according to any one of claims 2 to 4, characterized in that the bottom quick-plug connector is located in the middle of the length direction of the box, and is in the same box as the bottom quick-plug connector. Each of the battery modules in the battery module is symmetrically arranged on both sides of the bottom quick-plug connector along the length direction of the box.
The battery system according to any one of claims 1 to 5, wherein the box includes a top box, a middle box and a bottom box, and the top box, the middle box and the bottom box The bottom boxes are stacked in sequence along the vertical direction, the top quick-plug connector is arranged on the top plate of the top box, the bottom quick-plug connector is arranged on the bottom plate of the bottom box, and the high-voltage box and the manual maintenance switch is arranged on the side wall of the intermediate box.
The battery system according to claim 6, wherein a first installation box and a second installation box are provided on the side wall of the middle box, and the first installation box and the second installation box are located at Inside the intermediate box, the high-voltage box is arranged in the first installation box, and the manual maintenance switch is arranged in the second installation box.
The battery system according to claim 6 or 7, characterized in that an operation window is provided on the side wall of the intermediate box, and a detachable door panel is provided at the operation window.
The battery system according to any one of claims 6 to 8, characterized in that: Fixing holes and fixing ribs are respectively provided on the inner side walls and bottom plates of the top box, the middle box and the bottom box.
The battery system according to any one of claims 6 to 9, wherein the connecting wire group includes a first wire group, one end of the first wire group is connected to the high-voltage box, and the first wire group The other end of the group passes through the upper side of the battery core module in the middle box and is connected to the positive and negative poles of the top quick-plug connector from the middle part of the middle box.
The battery system according to any one of claims 6 to 10, wherein the connecting wire group includes a second wire group, a first wire hole is provided on the bottom plate of the intermediate box, and the second wire group One end of the second wire group is connected to the high-voltage box. After the other end of the second wire group passes through the first wiring hole, it extends to the bottom box through the lower side of the battery core module in the bottom box. in the middle, and connect it to the positive and negative poles of the bottom quick-plug connector.
The battery system according to claim 11, characterized in that, in the second wire group, an insulating plate is provided at least in a section located below the battery core module in the bottom box, and the insulating plate arranged on the upper and lower sides of the second wire group.
The battery system according to any one of claims 3 to 12, wherein the connection line group includes a total positive connection line, a total negative connection line, a switch anode connection line, a switch cathode connection line and a multi-segment series line.
The battery system according to claim 13, wherein the high-voltage box is connected to the positive electrode of the battery core module in the intermediate box through the total positive connection line, and is connected to the positive electrode of the battery core module in the intermediate box through the total negative connection line. Connect the negative electrode of the battery module in the bottom box.
The battery system according to claim 13 or 14, wherein the first switch is connected in series to the battery core module in the bottom box through the switch anode connection line and the switch cathode connection line. between the battery pack and the battery core module in the intermediate box.
The battery system according to any one of claims 13 to 15, characterized in that the second switch is connected in series between the main positive connection line and the high-voltage box.
The battery system according to any one of claims 13 to 16, characterized in that: between each of the battery modules in the battery module and between the battery modules in the intermediate box They are connected in series with the battery core modules in the top box respectively through the series wires.
The battery system according to any one of claims 1 to 17, wherein the connecting wire group includes a parallel wire group; there are two bottom quick-plug connectors and two top quick-plug connectors, respectively. The two bottom quick-plug connectors and the two top quick-plug connectors are connected in parallel through the parallel wire set.
The battery system according to any one of claims 1 to 18, characterized in that at least some of the connecting wires in the connecting wire group adopt a copper bar structure.
An electric working machine, characterized by comprising at least one battery system according to any one of claims 1 to 19.