Multi-battery parallel system and electric equipment

Abstract

The utility model provides a multi-battery parallel system and electric equipment. The multi-battery parallel system comprises a plurality of rechargeable batteries, a plurality of battery bases and an address identification assembly, the address identification assembly comprises an identification piece and a positioning piece, the identification piece is arranged in the rechargeable battery, and the positioning piece is used for being arranged on the battery base; wherein at least one of the plurality of battery bases is provided with the positioning piece. According to the utility model, an address can be allocated to each battery base, so that connection between different rechargeable batteries is established, and blind merging of the batteries is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a multi-battery parallel system and electric equipment. Background Art

[0002] Blind paralleling refers to inserting any two or more rechargeable batteries into a battery base and connecting them directly in parallel. The voltage difference between a fully charged battery and a rechargeable battery in a rechargeable state is quite large. When a fully charged battery and a rechargeable battery in a rechargeable state are directly connected in parallel, a very large kickback current is generated at the moment of parallel connection. This kickback current can damage the MOSFETs in the BMS (Battery Management System). Therefore, current electric devices do not support blind paralleling. Utility Model Content

[0003] The utility model provides a multi-battery parallel system and electric equipment, aiming to solve the problem that current electric equipment does not support blind parallel connection.

[0004] In a first aspect, the utility model provides a multi-battery parallel system, which is applied to electric equipment, and the multi-battery parallel system includes multiple rechargeable batteries, multiple battery bases and an address identification component; the address identification component includes an identification member and a positioning member, the identification member is arranged in the rechargeable battery, and the positioning member is used to be arranged on the battery base; wherein, at least one of the multiple battery bases is provided with the positioning member.

[0005] Furthermore, two battery bases are included, and the two battery bases are respectively a first battery base and a second battery base; at least one of the first battery base and the second battery base is provided with the positioning member.

[0006] Furthermore, the positioning member is provided on the first battery base.

[0007] Furthermore, four battery bases are included, which are respectively a third battery base, a fourth battery base, a fifth battery base and a sixth battery base; at least one of the third battery base, the fourth battery base, the fifth battery base and the sixth battery base is not provided with the positioning member.

[0008] Furthermore, the third battery base is provided with a positioning member.

[0009] Furthermore, the fourth battery base is provided with a positioning member, and the area of ​​the fourth battery base where the positioning member is provided does not overlap with the area of ​​the third battery base where the positioning member is provided.

[0010] Furthermore, the fifth battery base is provided with two positioning members, and the two positioning members are located in different areas.

[0011] Furthermore, the battery base also includes an electrode assembly, which is arranged in the battery base and is used to connect to the rechargeable battery.

[0012] Furthermore, the battery base also includes a signal component, which is arranged in the battery base and is used to connect to the rechargeable battery.

[0013] In a second aspect, the present invention further provides an electric device, which includes the multi-battery parallel system described in any one of the above items.

[0014] The electric equipment disclosed in the present utility model includes a multi-battery parallel system, which includes multiple rechargeable batteries, multiple battery bases and an address identification component. The address identification component includes an identification part and a positioning part. The identification part is arranged on the rechargeable battery, and the positioning part is used to be arranged on the battery base. An address can be assigned to each battery base according to whether a positioning part is provided on the battery base, the position of the positioning part and the number of the positioning parts. When the rechargeable battery is connected to the battery base, the identification part identifies the corresponding positioning part and confirms the address of the connected battery base. The rechargeable batteries of different battery bases can obtain the information of each rechargeable battery through the address of the battery base, which is convenient for BMS to manage and avoid large voltage differences between each rechargeable battery, thereby realizing blind paralleling. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 This is an overall structural diagram of a rechargeable battery and a battery base provided in one embodiment of the present utility model;

[0017] Figure 2 This is an exploded view of a rechargeable battery and a battery base provided in one embodiment of the present utility model;

[0018] Figure 3 This is a structural diagram of a battery base provided by an embodiment of the present utility model;

[0019] Figure 4 This is a structural diagram of a multi-battery parallel system provided by the first embodiment of the present utility model;

[0020] Figure 5This is a structural diagram of a multi-battery parallel system provided by the second embodiment of the present utility model;

[0021] Figure 6 This is a structural diagram of a multi-battery parallel system provided by the third embodiment of the present utility model;

[0022] Description of the accompanying drawings: 100, multi-battery parallel system; 10, rechargeable battery; 20, battery base; 21, electrode assembly; 211, positive electrode; 212, negative electrode; 22, signal assembly; 221, CAN_L; 222, CAN_H; 23, support platform; 24, connecting bridge; 30, address identification assembly; 31, identification part; 32, positioning part. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] It will be understood that when used in this specification and the appended claims, the terms “include” and “comprising” indicate the presence of described features, integers, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, operations, elements, components and / or groups thereof.

[0025] It should also be understood that the terms used in this utility model specification are for the purpose of describing specific embodiments only and are not intended to limit the utility model. As used in this utility model specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms unless the context clearly indicates otherwise. It should also be further understood that the term "and / or" used in this utility model specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, including and including these combinations.

[0026] Furthermore, directional terms used in this disclosure, such as "up," "down," "front," "back," "left," "right," "inside," "outside," and "side," refer only to the accompanying drawings and the orientation of the product in use. Therefore, these directional terms are intended to illustrate and facilitate understanding of this disclosure and are not intended to limit this disclosure. Furthermore, in the accompanying drawings, similar or identical structures are denoted by the same reference numerals.

[0027] See also Figures 1 to 6 , Figure 1This is an overall structural diagram of a rechargeable battery 10 and a battery base 20 provided in one embodiment of the present invention; Figure 2 This is an exploded view of a rechargeable battery 10 and a battery base 20 provided in one embodiment of the present invention; Figure 3 This is a structural diagram of a battery base 20 provided in one embodiment of the present utility model;

[0028] Figure 4 1 is a structural diagram of a multi-battery parallel system 100 provided in a first embodiment of the present invention; Figure 5 1 is a structural diagram of a multi-battery parallel system 100 provided in a second embodiment of the present invention; Figure 6 This is a structural diagram of a multi-battery parallel system 100 provided in the third embodiment of the present invention. As shown, the multi-battery parallel system 100 includes multiple rechargeable batteries 10, multiple battery bases 20, and an address identification assembly 30. The address identification assembly 30 includes an identification member 31 and a positioning member 32. The identification member 31 is disposed within the rechargeable battery 10, and the positioning member 32 is disposed on the battery base 20. The positioning member 32 is provided on at least one of the multiple battery bases 20.

[0029] Specifically, electric devices are devices that rely on electricity to operate, primarily converting electrical energy into mechanical energy through electric motors. Batteries are the core energy source for electric devices. Taking electric bicycles as an example, most electric vehicles currently use a single lithium battery pack, which can meet users' daily travel needs. However, when users require longer battery life or faster speeds, the capacity of a single lithium battery pack is limited and cannot meet user needs. Simply increasing the number of lithium battery packs can easily damage the BMS due to voltage differences, making it impossible to directly connect multiple lithium batteries in parallel.

[0030] The present invention provides an electric device, which includes a multi-battery parallel system 100. The multi-battery parallel system 100 includes multiple rechargeable batteries 10, multiple battery bases 20, and an address identification component 30. The multi-battery parallel system 100 is installed in the electric device to power the electric device. Preferably, multiple battery bases 20 can be provided in the electric device, and the user can choose to install any number of rechargeable batteries 10 into the corresponding battery base 20 according to actual needs. For example, for an electric device, it can be provided with two battery bases 20. Then, the electric device can install at most two rechargeable batteries 10 at the same time, and one rechargeable battery 10 corresponds to one battery base 20. The user can choose to install one rechargeable battery 10 or two rechargeable batteries 10 at the same time. When only one rechargeable battery 10 is installed, the weight of the electric device can be reduced to meet daily travel needs. When two rechargeable batteries 10 are installed at the same time, the battery life and power of the electric device can be improved to meet the user's requirements for battery life.

[0031] The battery base 20 is installed in an electric device, which can be an electric-powered device such as an electric bicycle, an electric beach car, or an electric speedboat. The number of battery bases 20 installed in the electric device can vary depending on the specific usage scenario, and can be two, three, or more. For example, if two battery bases 20 are installed in the electric device, two rechargeable batteries 10 can be configured accordingly, with one battery base 20 corresponding to each battery base 20.

[0032] The address identification component 30 includes an identification member 31 and a positioning member 32. The identification member 31 is provided in the rechargeable battery 10, and can be located in the battery cell of the rechargeable battery 10 and near the connection with the battery base 20. The identification member 31 can be a Hall sensor, and the number of Hall sensors is usually multiple, that is, multiple Hall sensors are provided in the rechargeable battery 10, and the multiple Hall sensors are located in different areas of the rechargeable battery 10 for identifying different positioning members 32. Figure 2 As shown, Figure 2 The positioning member 32 and the identification member 31 indicated by the middle arrows are only used to illustrate the installation positions of the identification member 31 and the positioning member 32, and their specific structures are not shown.

[0033] The positioning member 32 can be a magnetic element, such as a magnet. The positioning member 32 is provided in the battery base 20. For example, it can be provided at the bottom of the battery base 20. A mounting structure for mounting the positioning member 32 can be provided at the bottom of the battery base 20. The mounting structure can be a mounting groove, a limit groove, or other structure for fixing the positioning member 32. The specific structure is not limited here. In addition, the positioning member 32 can also be adhered to the bottom of the battery base 20 by an adhesive. In addition to providing the positioning member 32 at the bottom of the battery base 20, an inner cavity can also be provided in the battery base 20, and the positioning member 32 can be provided in the inner cavity of the battery base 20. The positioning member 32 is used to identify different battery bases 20, so as to facilitate the assignment of different addresses to the battery bases 20. The address of the battery base 20 can refer to a CAN address. Through the cooperation of the identification member 31 and the positioning member 32, a CAN address can be assigned to each battery base 20 in the multi-battery parallel system 100, which is convenient for management by the BMS. Whether a battery base 20 is provided with a positioning member 32 and the number of positioning members 32 provided are determined by the overall multi-battery parallel system 100. For example, for a multi-battery parallel system 100 with two battery bases 20, a positioning member 32 may be provided on one battery base 20, while no positioning member 32 is provided on the other battery base 20. Alternatively, a positioning member 32 may be provided in one area of ​​one battery base 20, while a positioning member 32 is provided in another area of ​​the other battery base 20. For a multi-battery parallel system 100 with four battery bases 20, a positioning member 32 may be provided in different areas of each of the four battery bases 20.

[0034] In actual use, take an electric device with two battery bases 20, one of which is provided with a positioning part 32 and the other is not provided with a positioning part 32 as an example. When the user only needs one rechargeable battery 10, the rechargeable battery 10 can be inserted into one of the battery bases 20. The BMS of the electric device will recognize it as a single-power mode and assign a CAN address to the rechargeable battery 10, which is powered by one rechargeable battery 10. When the user needs two rechargeable batteries 10 to be powered at the same time, the other rechargeable battery 10 is inserted into the other battery base 20. At this time, the identification part 31 of the rechargeable battery 10 inserted into the battery base 20 with the positioning part 32 detects the corresponding positioning part 32, and the identification part 31 of the rechargeable battery 10 inserted into the battery base 20 without the positioning part 32 does not detect any positioning part 32. The BMS assigns a CAN address to each of the two battery bases 20. The two rechargeable batteries 10 can communicate with each other through CAN to obtain each other's information, which is convenient for BMS management. For example, when the voltage of one rechargeable battery 10 is higher and the voltage of the other rechargeable battery 10 is lower, the BMS controls the rechargeable battery 10 with the higher voltage to turn on both the charging MOS transistor and the discharging MOS transistor, and controls the rechargeable battery 10 with the lower voltage to turn on only the discharging MOS transistor, thereby preventing reverse charging of the rechargeable battery 10 with the lower voltage. When the voltages of the two rechargeable batteries 10 are equal, the two rechargeable batteries 10 are successfully connected in parallel and can be discharged and charged simultaneously. With the above settings, users can connect any number of batteries in parallel at any time, achieving blind paralleling of batteries.

[0035] As a further embodiment, two battery bases 20 are included, and the two battery bases 20 are respectively a first battery base and a second battery base; at least one of the first battery base and the second battery base 20 is provided with the positioning member 32. Furthermore, the positioning member 32 is provided on the first battery base.

[0036] Among them, such as Figure 4 As shown, Figure 4 In the figure, A is the first battery base and B is the second battery base. Both battery bases 20 can be installed in the electric device. When the first battery base is inserted into the rechargeable battery 10, the electric device is in single-power mode. When the first battery base and the second battery base are both inserted into the rechargeable battery 10, the electric device is in dual-power parallel mode.

[0037] like Figure 5 As shown, Figure 5 A is the first battery base, B is the second battery base, and Figure 4 The difference is, Figure 5 The second battery base is provided with a positioning member 32, and Figure 4 The second battery base in the embodiment is not provided with a battery base 20. Figure 5The position of the positioning member 32 of the second battery base is different from that of the positioning member 32 of the first battery base, that is, different battery bases 20 can be identified by setting positioning members 32 in different areas of the battery base 20, thereby assigning different CAN addresses to the battery bases 20. Figure 5 When the rechargeable battery 10 is inserted into the first battery base, the identification member 31 that matches the positioning member 32 of the first battery base can detect the positioning member 32. Figure 5 In the second battery base shown, the identification member 31 of the rechargeable battery 10 that matches the positioning member 32 of the second battery base can detect the corresponding positioning member 32. That is, the rechargeable battery 10 is provided with multiple identification members 31, and the multiple identification members 31 are arranged in different areas for detecting the positioning members 32 in different areas.

[0038] As a further embodiment, four battery bases 20 are included, namely a third battery base, a fourth battery base, a fifth battery base, and a sixth battery base; at least one of the third, fourth, fifth, and sixth battery bases 20 is not provided with the positioning member 32. Furthermore, the third battery base is provided with a positioning member 32. Furthermore, the fourth battery base is provided with a positioning member 32, and the area of ​​the fourth battery base provided with the positioning member 32 does not overlap with the area of ​​the third battery base provided with the positioning member 32. Furthermore, the fifth battery base is provided with two positioning members 32, and the two positioning members 32 are located in different areas.

[0039] The multi-battery parallel system 100 may further include four battery bases 20, namely a third battery base, a fourth battery base, a fifth battery base and a sixth battery base. Figure 6 As shown, Figure 6 In the middle, C is the third battery base, D is the fourth battery base, E is the fifth battery base, and F is the sixth battery base. Figure 6 The positioning member 32 of the third battery base is located at the lower left, the positioning member 32 of the fourth battery base is located at the upper right, the fifth battery base is provided with a positioning member 32 at the lower left and lower right respectively, and the sixth battery base is not provided with a positioning member 32.

[0040] In actual use, the third battery base, the fourth battery base, the fifth battery base, and the sixth battery base can be sequentially arranged on the electric device. When inserting batteries, the user can insert them in sequence. For example, when only one rechargeable battery 10 is needed, the rechargeable battery 10 is inserted into the third battery base. When the user needs two rechargeable batteries 10, the first rechargeable battery 10 is inserted into the third battery base, and the second rechargeable battery 10 is inserted into the fourth battery base. When the user needs four rechargeable batteries 10, the first rechargeable battery 10 is inserted into the third battery base, the second rechargeable battery 10 is inserted into the fourth battery base, the third rechargeable battery 10 is inserted into the fifth battery base, and the fourth rechargeable battery 10 is inserted into the sixth battery base. Accordingly, the identification member 31 of the positioning member 32 detected by the rechargeable batteries 10 inserted into different battery bases 20 is also different, so that each battery base 20 can be assigned a CAN address.

[0041] As a further embodiment, the battery base 20 further includes an electrode assembly 21, which is disposed in the battery base 20 and is used to connect to the rechargeable battery 10. Furthermore, the battery base 20 further includes a signal assembly 22, which is disposed in the battery base 20 and is used to connect to the rechargeable battery 10.

[0042] The battery base 20 may include a support platform 23, which is connected to the housing of the battery base 20 via connecting bridges 24 on all sides to secure the support platform 23. An electrode assembly 21 and a signal assembly 22 are provided on the support platform 23. Both the electrode assembly 21 and the signal assembly 22 are used to connect to the rechargeable battery 10. The electrode assembly 21 is used to charge the rechargeable battery 10, and the signal assembly 22 is used to establish a signal connection with the rechargeable battery 10 to facilitate signal transmission. Preferably, the electrode assembly 21 may include a positive electrode 211 and a negative electrode 212, and the signal assembly 22 may include a CAN_H 222 and a CAN_L 221.

[0043] The present utility model also provides an electric device, which includes the multi-battery parallel system 100 described in any one of the above embodiments, wherein the multi-battery parallel system 100 includes multiple rechargeable batteries 10, multiple battery bases 20 and an address identification component 30; the address identification component 30 includes an identification member 31 and a positioning member 32, wherein the identification member 31 is arranged in the rechargeable battery 10, and the positioning member 32 is used to be arranged on the battery base 20; wherein, at least one of the multiple battery bases 20 is provided with the positioning member 32.

[0044] Specifically, electric devices are devices that rely on electricity to operate, primarily converting electrical energy into mechanical energy through electric motors. Batteries are the core energy source for electric devices. Taking electric bicycles as an example, most electric vehicles currently use a single lithium battery pack, which can meet users' daily travel needs. However, when users require longer battery life or faster speeds, the capacity of a single lithium battery pack is limited and cannot meet user needs. Simply increasing the number of lithium battery packs can easily damage the BMS due to voltage differences, making it impossible to directly connect multiple lithium batteries in parallel.

[0045] The present invention provides an electric device, which includes a multi-battery parallel system 100. The multi-battery parallel system 100 includes multiple rechargeable batteries 10, multiple battery bases 20, and an address identification component 30. The multi-battery parallel system 100 is installed in the electric device to power the electric device. Preferably, multiple battery bases 20 can be provided in the electric device, and the user can choose to install any number of rechargeable batteries 10 into the corresponding battery base 20 according to actual needs. For example, for an electric device, it can be provided with two battery bases 20. Then, the electric device can install at most two rechargeable batteries 10 at the same time, and one rechargeable battery 10 corresponds to one battery base 20. The user can choose to install one rechargeable battery 10 or two rechargeable batteries 10 at the same time. When only one rechargeable battery 10 is installed, the weight of the electric device can be reduced to meet daily travel needs. When two rechargeable batteries 10 are installed at the same time, the battery life and power of the electric device can be improved to meet the user's requirements for battery life.

[0046] The battery base 20 is installed in an electric device, which can be an electric-powered device such as an electric bicycle, an electric beach car, or an electric speedboat. The number of battery bases 20 installed in the electric device can vary depending on the specific usage scenario, and can be two, three, or more. For example, if two battery bases 20 are installed in the electric device, two rechargeable batteries 10 can be configured accordingly, with one battery base 20 corresponding to each battery base 20.

[0047] The address identification component 30 includes an identification member 31 and a positioning member 32. The identification member 31 is provided in the rechargeable battery 10, and can be located in the battery cell of the rechargeable battery 10 and near the connection with the battery base 20. The identification member 31 can be a Hall sensor, and the number of Hall sensors is usually multiple, that is, multiple Hall sensors are provided in the rechargeable battery 10, and the multiple Hall sensors are located in different areas of the rechargeable battery 10 for identifying different positioning members 32. Figure 2 As shown, Figure 2 The positioning member 32 and the identification member 31 indicated by the middle arrows are only used to illustrate the installation positions of the identification member 31 and the positioning member 32, and their specific structures are not shown.

[0048] The positioning member 32 can be a magnetic element, such as a magnet. The positioning member 32 is provided in the battery base 20. For example, it can be provided at the bottom of the battery base 20. A mounting structure for mounting the positioning member 32 can be provided at the bottom of the battery base 20. The mounting structure can be a mounting groove, a limit groove, or other structure for fixing the positioning member 32. The specific structure is not limited here. In addition, the positioning member 32 can also be adhered to the bottom of the battery base 20 by an adhesive. In addition to providing the positioning member 32 at the bottom of the battery base 20, an inner cavity can also be provided in the battery base 20, and the positioning member 32 can be provided in the inner cavity of the battery base 20. The positioning member 32 is used to identify different battery bases 20, so as to facilitate the assignment of different addresses to the battery bases 20. The address of the battery base 20 can refer to a CAN address. Through the cooperation of the identification member 31 and the positioning member 32, a CAN address can be assigned to each battery base 20 in the multi-battery parallel system 100, which is convenient for management by the BMS. Whether a battery base 20 is provided with a positioning member 32 and the number of positioning members 32 provided are determined by the overall multi-battery parallel system 100. For example, for a multi-battery parallel system 100 with two battery bases 20, a positioning member 32 may be provided on one battery base 20, while no positioning member 32 is provided on the other battery base 20. Alternatively, a positioning member 32 may be provided in one area of ​​one battery base 20, while a positioning member 32 is provided in another area of ​​the other battery base 20. For a multi-battery parallel system 100 with four battery bases 20, a positioning member 32 may be provided in different areas of each of the four battery bases 20.

[0049] In actual use, take an electric device with two battery bases 20, one of which is provided with a positioning part 32 and the other is not provided with a positioning part 32 as an example. When the user only needs one rechargeable battery 10, the rechargeable battery 10 can be inserted into one of the battery bases 20. The BMS of the electric device will recognize it as a single-power mode and assign a CAN address to the rechargeable battery 10, which is powered by one rechargeable battery 10. When the user needs two rechargeable batteries 10 to be powered at the same time, the other rechargeable battery 10 is inserted into the other battery base 20. At this time, the identification part 31 of the rechargeable battery 10 inserted into the battery base 20 with the positioning part 32 detects the corresponding positioning part 32, and the identification part 31 of the rechargeable battery 10 inserted into the battery base 20 without the positioning part 32 does not detect any positioning part 32. The BMS assigns a CAN address to each of the two battery bases 20. The two rechargeable batteries 10 can communicate with each other through CAN to obtain each other's information, which is convenient for BMS management. For example, when the voltage of one rechargeable battery 10 is higher and the voltage of the other rechargeable battery 10 is lower, the BMS controls the rechargeable battery 10 with the higher voltage to turn on both the charging MOS transistor and the discharging MOS transistor, and controls the rechargeable battery 10 with the lower voltage to turn on only the discharging MOS transistor, thereby preventing reverse charging of the rechargeable battery 10 with the lower voltage. When the voltages of the two rechargeable batteries 10 are equal, the two rechargeable batteries 10 are successfully connected in parallel and can be discharged and charged simultaneously. With the above settings, users can connect any number of batteries in parallel at any time, achieving blind paralleling of batteries.

[0050] The multi-battery parallel system and electric equipment disclosed by the utility model are provided with an identification piece on the rechargeable battery and a positioning piece on the battery base. An address is assigned to each battery base through the identification piece and the positioning piece, which facilitates the establishment of connections between different rechargeable batteries and realizes blind parallel connection.

[0051] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions are intended to be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A multi-battery parallel system, characterized in that: Used in electric equipment, including: multiple rechargeable batteries and multiple battery docks; An address identification component, the address identification component comprising an identification member and a positioning member, the identification member being disposed in the rechargeable battery, and the positioning member being disposed on the battery base; Wherein, at least one of the plurality of battery bases is provided with the positioning member.

2. The multi-battery parallel system according to claim 1, characterized in that: The device comprises two battery bases, and the two battery bases are respectively a first battery base and a second battery base; At least one of the first battery base and the second battery base is provided with the positioning member.

3. The multi-battery parallel system according to claim 2, characterized in that: The positioning member is provided on the first battery base.

4. The multi-battery parallel system according to claim 1, wherein: The four battery bases are respectively a third battery base, a fourth battery base, a fifth battery base and a sixth battery base; At least one of the third battery base, the fourth battery base, the fifth battery base, and the sixth battery base is not provided with the positioning member.

5. The multi-battery parallel system according to claim 4, characterized in that: The third battery base is provided with a positioning member.

6. The multi-battery parallel system according to claim 5, characterized in that: The fourth battery base is provided with a positioning member, and the area of ​​the fourth battery base where the positioning member is provided does not overlap with the area of ​​the third battery base where the positioning member is provided.

7. The multi-battery parallel system according to claim 6, characterized in that: The fifth battery base is provided with two positioning members, and the two positioning members are located in different areas.

8. The multi-battery parallel system according to claim 1, wherein: The battery base further includes an electrode assembly, which is disposed in the battery base and is used for connecting to the rechargeable battery.

9. The multi-battery parallel system according to claim 8, characterized in that: The battery base further includes a signal component, which is disposed in the battery base and is used to connect to the rechargeable battery.

10. An electric device, characterized in that: The multi-battery parallel system comprises the multi-battery parallel system according to any one of claims 1 to 9.

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