Battery system and vehicle

Abstract

The utility model relates to a battery system and a vehicle, relates to the technical field of automobile power batteries, and aims to optimize the charging condition of a battery pack. The battery system comprises a battery pack, a first switch module, a processor and a detection module. The battery pack comprises a plurality of batteries connected in parallel. The first switch module comprises a plurality of first switches, the plurality of first switches are in one-to-one correspondence with the plurality of batteries, one end of each first switch is connected with the corresponding battery, and the other end of each first switch is connected with the battery system. The processor is connected with the first switch module. The detection module is connected with the processor and the battery pack. The detection module is configured to obtain charging information of each battery in the battery pack and send the charging information to the processor. The processor is configured to receive the charging information and control the corresponding first switches to be turned on or turned off according to the charging information of the batteries. Due to the fact that the phenomenon of overcharging of the battery is prevented, the charging condition of the battery pack is optimized, and the service life of the battery pack is prolonged.

Description

Technical Field

[0001] This application relates to the technical field of automotive power batteries, and particularly relates to a battery system and a vehicle. Background Art

[0002] As a core component of new energy vehicles, the performance of the battery pack directly affects the driving range and safety performance of new energy vehicles.

[0003] The battery pack usually includes multiple batteries. Referring to CN113178904B, a battery equalization system. The battery equalization system includes a gating module. The gating module is connected to the battery pack. By setting the gating module, a single target battery in the battery pack is selected to detect its internal resistance, and a corresponding charging strategy is formulated according to the detected internal resistance.

[0004] However, in the actual application process, since the gating module charges the batteries one by one, the efficiency is low and it cannot meet the demand for rapid charging of the vehicle during travel. Summary of the Utility Model

[0005] The purpose of this application is to provide a battery system and a vehicle, aiming to optimize the charging condition of the battery pack.

[0006] In order to achieve the above purpose, the technical solution adopted in this application is as follows:

[0007] According to the first aspect of this application, a battery system is provided. The battery system includes a battery pack, a first switch module, a processor, and a detection module. The battery pack includes multiple batteries connected in parallel to each other. The first switch module includes multiple first switches. The multiple first switches correspond to the multiple batteries one by one. One end of the first switch is connected to the corresponding battery, and the other end of the first switch is connected to the battery system. The battery system is configured to charge the battery pack. The processor is connected to the first switch module. The detection module is connected to the processor and is also connected to the battery pack. The detection module is configured to obtain the charging information of each battery in the battery pack and send the charging information to the processor. The processor is configured to receive the charging information and control the opening or closing of the corresponding first switch according to the charging information of each battery.

[0008] Multiple first switches in the first switch module correspond to multiple batteries one by one. Since both ends of the first switch are respectively connected to the battery and the battery system, when the first switch is closed, the battery system can supply power to the battery corresponding to the first switch. When the first switch is opened, the battery system no longer charges the battery corresponding to the first switch. The detection module detects the charging information of each battery in real time and transmits the charging information to the processor. The processor can judge the charging status of each battery according to the charging information. When it is judged that a certain battery in the battery pack is overcharged, the processor controls the first switch corresponding to the battery to switch from the closed state to the open state until all the batteries are fully charged. Since the occurrence of battery overcharging is prevented and the charging condition of the battery pack is optimized, the service life of each battery is extended, and the service life of the overall battery pack is also extended.

[0009] As a possible implementation, the battery system further includes a second switch module. The second switch module includes multiple second switches, and the multiple second switches correspond to the multiple batteries one by one. One ends of the multiple second switches are connected to each other, and the other ends of the multiple second switches are connected to the corresponding batteries. The processor is further configured to: control the opening or closing of the corresponding second switch according to the charging information of each battery.

[0010] As a possible implementation, the battery system further includes a second switch module. The battery pack includes N batteries, the second switch module includes N - 1 second switches, the N - 1 second switches correspond to N - 1 batteries one by one, one ends of the N - 1 second switches are connected to each other, and the other ends of the N - 1 second switches are connected to the corresponding batteries. The processor is further configured to: control the opening or closing of the corresponding second switch according to the charging information of each battery.

[0011] As a possible implementation, the detection module includes multiple detection terminals, and the multiple detection terminals are connected to the multiple batteries one by one.

[0012] As a possible implementation, the charging information includes: the internal resistance of the battery, the charging time, and the voltage of the battery. The processor is further configured to store the rated charging time and rated voltage of each battery among the multiple batteries.

[0013] As a possible implementation, the processor is connected to the battery system. The battery system includes multiple power supply terminals, and the multiple power supply terminals are connected to the multiple first switches one by one. The processor is further configured to: record the charging times of each battery, and when the charging times of the battery are greater than the first threshold, output a first signal to the battery system. The battery system is further configured to: receive the first signal and control the power supply voltage of the power supply terminal corresponding to the battery with the charging times greater than the first threshold to decrease according to the first signal.

[0014] According to a second aspect provided by the present application, a battery system is provided, including a battery pack, a third switch module, a processor, and a detection module. The battery pack is connected to the battery system, and the battery system is configured to charge the battery pack. Among them, the battery pack includes a plurality of batteries connected in series in sequence. The third switch module includes a plurality of third switches, and the plurality of third switches correspond to the plurality of batteries one by one. One end of the third switch is connected to one pole of the corresponding battery, and the other end of the third switch is connected to the other pole of the corresponding battery. The processor is connected to the third switch module, the detection module is connected to the processor, and is also connected to the battery pack. The detection module is configured to: obtain the charging information of each battery in the battery pack and send the charging information to the processor. The processor is configured to: receive the charging information and control the opening or closing of the corresponding third switch according to the charging information of each battery.

[0015] As a possible implementation, the detection module includes a plurality of detection terminals, and the plurality of detection terminals are connected to the plurality of batteries one by one.

[0016] As a possible implementation, the charging information includes: the internal resistance of the battery, the charging time, and the voltage of the battery. The processor is further configured to store the rated charging time and rated voltage of each battery among the plurality of batteries.

[0017] As a possible implementation, the processor is connected to the battery system. The battery system includes a plurality of power supply terminals, and the plurality of power supply terminals are connected to a plurality of first switches one by one. The processor is further configured to: record the charging times of each battery, and when the charging times of the battery are greater than a first threshold, output a first signal to the battery system. The battery system is further configured to: receive the first signal and control the power supply voltage of the power supply terminal corresponding to the battery with the charging times greater than the first threshold to decrease according to the first signal.

[0018] In a third aspect, the present application further provides a vehicle, including the battery system mentioned in the first aspect and its possible implementations, or the battery system mentioned in the second aspect and its possible implementations.

[0019] Among them, the beneficial effects brought by the second aspect, the third aspect and their possible implementations can refer to the first aspect and its possible implementations, which will not be elaborated here. Description of the Drawings

[0020] Figure 1 It is a schematic diagram of a battery system provided by an embodiment of the present application;

[0021] Figure 2 It is a schematic diagram of another battery system provided by an embodiment of the present application;

[0022] Figure 3 It is a schematic diagram of another battery system provided by an embodiment of the present application;

[0023] Figure 4 Schematic diagram of another battery system provided by an embodiment of the present application;

[0024] Figure 5 Schematic diagram of a vehicle provided by an embodiment of the present application.

[0025] In the figure, 1 - battery system; 2 - battery pack; 3 - first switch module; 4 - processor; 5 - detection module; 21 - battery; 31 - first switch; 51 - detection end; 51a - first detection end; 51b - second detection end; 61 - second switch; 1-1 - first power supply end; 1-2 - second power supply end; 6 - second switch module; 7 - third switch module; 71 - third switch; 100 - vehicle. Detailed implementation manners

[0026] The following will describe the implementation manners of the present application with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. The present application can also be implemented or applied through different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for illustrating the present application, rather than for limiting the protection scope of the present application.

[0027] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present application in a schematic manner. Therefore, only the components related to the present application are shown in the diagrams, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0028] In the description of the embodiments, unless otherwise specified, " / " means "or". For example, A / B can represent A or B. The "and / or" herein is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, "at least one" and "a plurality of" mean two or more. The words such as "first" and "second" do not limit the quantity and execution order, and the words such as "first" and "second" do not necessarily limit being different.

[0029] With the gradual reduction of fossil energy and the increasing environmental problems, the development of new energy has become an irresistible trend, and new energy vehicles have also become the development direction of the automotive industry. As the core component of new energy vehicles, the performance of the battery pack directly affects the driving range and safety performance of new energy vehicles.

[0030] The battery pack of a new energy vehicle usually includes multiple batteries connected in series or in parallel, and the life and capacity of each battery have an impact on the entire battery pack. In the continuous cycle of charging and discharging of the battery pack, the charging and discharging of each battery in the battery pack is not synchronized. For example, the battery pack includes a first battery and a second battery, and the first battery and the second battery have the same capacity. During the operation of the vehicle, the power consumption rate of the first battery is higher than that of the second battery. When charging a new energy vehicle, the existing battery system often charges the first battery and the second battery at the same time, and the charging of the battery pack will not be disconnected until the first battery and the second battery are both fully charged.

[0031] However, since the remaining capacity of the first battery and the second battery is different, at the same charging rate, the second battery will be fully charged first due to its larger remaining capacity. At this time, since the first battery is not fully charged, the second battery will continue to be charged, which will cause the second battery to be in an overcharged state.

[0032] The existing technology often causes the batteries in the battery pack to be in an overcharged state. Once the battery is in an overcharged state for a long time, the life span and performance will be greatly reduced. The reduction in battery life and performance will lead to a reduction in the life of the entire battery pack, and even potential safety hazards. In order to avoid overcharging, the existing technology will cause a single battery to be fully charged, resulting in a direct reduction in driving range. Therefore, how to optimize the charging status of the battery pack has become an urgent problem to be solved.

[0033] In view of this, the present application provides a battery system, exemplarily, as Figure 1 The battery system 1 includes a battery pack 2, a first switch module 3, a processor 4 and a detection module 5. The battery pack 2 includes a plurality of batteries 21 connected in parallel, for example Figure 1 The first switch module 3 includes a plurality of first switches 31, and the plurality of first switches 31 correspond to the plurality of batteries 21 one by one. For example, the first battery corresponds to one of the plurality of first switches 31, the second battery corresponds to one of the plurality of first switches 31, and the third battery corresponds to one of the plurality of first switches 31.

[0034] One end of the first switch 31 is connected to the corresponding battery 21, and the other end of the first switch 31 is connected to the battery system 1. The battery system 1 is configured to charge the battery pack 2. For example, the battery system 1 can be a charging pile. The processor 4 is connected to the first switch module 3. The detection module 5 is connected to the processor 4 and is also connected to the battery pack 2. The detection module 5 is configured to obtain the charging information of each battery 21 in the battery pack 2 and send the charging information to the processor 4. The processor 4 is configured to receive the charging information and control the opening or closing of the corresponding first switch 31 according to the charging information of each battery 2.

[0035] The multiple first switches 31 in the first switch module 3 correspond to the multiple batteries 21 one by one. Since the two ends of the first switch 31 are connected to the battery 21 and the battery system 1 respectively, when the first switch 31 is closed, the battery system 1 can supply power to the battery 21 corresponding to the first switch 31. When the first switch 31 is disconnected, the battery system 1 no longer continues to charge the battery 21 corresponding to the first switch 31. The detection module 5 detects the charging information of each battery 21 in real time and transmits the charging information to the processor 4. The processor can determine the charging status of each battery 21 according to the charging information. When it is determined that a battery 21 of the battery pack 2 is overcharged, the processor 4 controls the first switch 31 corresponding to the battery 21 to switch from the closed state to the open state until all the batteries 21 are fully charged. Since the overcharging of the battery 21 is prevented, the charging condition of the battery pack 2 is optimized, so the life of each battery 21 is extended, and the life of the entire battery pack 2 is also extended.

[0036] For example, when the car starts to charge, all the first switches 31 in the first switch module 3 are closed, and the battery system 1 supplies power to each battery. Since the remaining power of each battery 21 is different, the time it takes to fully charge each battery is also different. The detection module 5 detects the status of each battery 21 in real time, and sends the charging information of each detected battery to the processor 4. When the processor 4 determines that the first battery is full according to the charging information, the first switch 31 connected to the first battery is controlled to be disconnected. When the processor 4 determines that the second battery is full according to the charging information, the first switch 31 connected to the second battery is controlled to be disconnected, until all batteries are fully charged, all first switches 31 are disconnected, and the car is fully charged.

[0037] In some embodiments, Figure 1 As shown, the detection module 5 includes a plurality of detection terminals 51, and the plurality of detection terminals 51 are connected to a plurality of batteries in a one-to-one correspondence. Figure 1 The multiple detection terminals 51 in the detection module 5 include a first detection terminal 51a, and the first detection terminal 51a of the detection module 5 is connected to the first battery. The multiple detection terminals 51 include a second detection terminal 51b, and the second detection terminal 51b of the detection module 5 is connected to the second battery. Each battery has a detection terminal corresponding to it in the detection module 5. The multiple detection terminals 51 are connected to the multiple batteries one by one, and each detection terminal 51 detects the status of the corresponding battery, making the entire battery system more reliable, the detected battery charging status is more accurate, and the number of times information disorder occurs is reduced.

[0038] As a possible implementation, for example, Figure 2As shown, the battery system further includes a second switch module 6. The second switch module 6 includes a plurality of second switches 61. The plurality of second switches 61 correspond to the plurality of batteries 21 one by one. One ends of the plurality of second switches 61 are connected to each other, and the other ends of the plurality of second switches 61 are connected to the corresponding batteries 21. The processor 4 is further configured to control the turning on or off of the corresponding second switch 61 according to the charging information of each battery 21.

[0039] In the battery system provided by the present application, the second switches 61 in the second switch module are all in the normally open state. The processor 4 can control the turning on or off of the corresponding second switch 61 according to the charging information of each battery 21. Specifically, the processor 4 can judge the battery 21 with the most remaining charge to be charged and the battery 21 with the least remaining charge to be charged according to the charging situation. For example, Figure 2 the first battery in Figure 2 is the battery with the least remaining charge to be charged, and

[0040] the third battery in

[0041] is the battery with the most remaining charge to be charged. At this time, the processor 4 controls the first switch connected to the first battery to be disconnected, controls the second switch connected to the first battery to be closed, and controls the second switch connected to the third battery to be closed. At this time, while the battery system supplies power to the third battery, the first battery also charges the third battery. When the processor 4 judges that the remaining charge to be charged of the first battery and the third battery is the same according to the detected charging information, the processor 4 controls the second switch connected to the first battery to be disconnected, controls the second switch connected to the third battery to be disconnected, and controls the first switch connected to the first battery to be closed. Since the remaining power of the first battery and the third battery is the same, they will be fully charged simultaneously under the power supply of the battery system. Figure 3

[0042] Figure 3 Referring to Figure 3, the second switches 61 in the second switch module in the battery system provided by this application are all in the normally open state. The processor 4 can control the opening or closing of the corresponding second switch 61 according to the charging information of each battery 21. Specifically, still taking the first battery as the battery with the least remaining charge to be charged, Figure 2 the third battery in it is the battery with the most remaining charge to be charged. At this time, the processor 4 controls the first switch 31 connected to the first battery to disconnect, and controls the second switch connected to the third battery to close. At this time, while the battery system 1 supplies power to the third battery, the first battery also charges the third battery. When the processor 4 determines that the remaining charge amounts of the first battery and the third battery are the same according to the detected charging information, the processor 4 controls the first switch 31 connected to the first battery to close, and controls the second switch 61 connected to the third battery to disconnect. Since the remaining charge amounts of the first battery and the third battery are the same, they will be fully charged simultaneously under the power supply of the battery system 1.

[0043] When the processor 4 determines that the battery 21 is fully charged according to the charging information, it then controls the first switch connected to the battery 21 to disconnect, ending the charging. Using the battery system provided by this application can prevent overcharging while accelerating the overall charging speed of the batteries in the battery pack.

[0044] As a possible implementation, the detection module can detect the charging information of the battery. The charging information includes: the internal resistance of the battery, the charging time, and the voltage of the battery. The processor is also configured to store the rated charging time and rated voltage of each battery among multiple batteries. The processor records the start time of charging the battery after receiving the charging information. When each battery reaches its corresponding rated charging time, the processor controls the first switch corresponding to the battery to disconnect and stop charging.

[0045] The processor can also judge the charging state of the battery according to the voltage of the battery in the received charging information. When the voltage value is close to the rated voltage of the battery, it means the battery is fully charged. At this time, the first switch connected to the battery is disconnected. When the voltage of the battery is too different from the rated voltage of the battery, it means the battery is in an under-voltage state and will continue to be charged. The processor comprehensively considers the charging time and voltage of the battery to confirm the charging status of the battery, improving the reliability and accuracy of the entire battery system.

[0046] The processor can also judge the state of the battery according to the internal resistance of the battery in the received charging information. As the usage time of the battery continuously increases, the internal resistance of the battery also continuously increases. The processor can judge whether the battery needs to be replaced according to the internal resistance of the battery, thus ensuring the safety of the whole vehicle.

[0047] As a possible implementation, by way of example, such as Figure 3As shown, the processor 4 is connected to the battery system 1. The battery system 1 includes a plurality of power supply terminals, and the plurality of power supply terminals are connected to a plurality of first switches 31 in one-to-one correspondence. For example, the first power supply terminal 1-1 corresponds to the first switch 31 connected to the first battery, the second power supply terminal 1-2 corresponds to the first switch 31 connected to the second battery, and the third power supply terminal 1-3 corresponds to the first switch connected to the third battery. The processor 4 is further configured to record the charging times of each battery, and when the charging times of the battery are greater than a first threshold, output a first signal to the battery system 1. The battery system 1 is further configured to receive the first signal and, according to the first signal, control the power supply voltage of the power supply terminal corresponding to the battery with the charging times greater than the first threshold to be reduced.

[0048] As the number of charge and discharge cycles of the battery increases, the internal resistance of the battery is also continuously increasing. Therefore, the processor can also obtain the state of the battery according to the number of charging times of the battery. When the charging times of the battery are greater than the first threshold, it means that the battery has been charged and discharged a relatively large number of times, and its internal part has aged. Without replacing the battery, the battery system needs to slowly charge the battery with a low voltage. The processor comprehensively considers the internal resistance of the battery and the number of charge and discharge cycles of the battery to judge the state of the battery, improving the accuracy of the judgment. When the number of charge and discharge cycles of the battery is relatively large, the battery system is controlled to reduce the output voltage of the corresponding power supply terminal, ensuring the reliability and safety during the battery charging process, and further improving the life of the battery pack.

[0049] This application also provides a battery system, which is applicable to the case where each battery in the battery pack is connected in series. Exemplarily, as Figure 4 shown. Figure 4 The battery system shown includes a battery pack, a third switch module 7, a processor 4, and a detection module 5. The battery pack 2 is connected to the battery system 1, and the battery system 1 is configured to charge the battery pack 2. Among them, the battery pack 2 includes a plurality of batteries 21 connected in series in sequence. The third switch module 7 includes a plurality of third switches 71, and the plurality of third switches 71 correspond to the plurality of batteries 21 one by one. One end of the third switch 71 is connected to one pole of the corresponding battery 21, and the other end of the third switch 71 is connected to the other pole of the corresponding battery 21.

[0050] The processor 4 is connected to the third switch module 71, the detection module 5 is connected to the processor 4, and is also connected to the battery pack 2. The detection module 5 is configured to obtain the charging information of each battery 21 in the battery pack 2 and send the charging information to the processor 4. The processor 4 is configured to receive the charging information and control the opening or closing of the corresponding third switch 71 according to the charging information of each battery.

[0051] The switches in the third switch module are all in the normally open state. The detection module 5 continuously detects the charging information of each battery in the battery pack 2 and sends it to the processor 4. The processor 4 processes and analyzes the information to determine whether there is a fully charged battery. For example, if the first battery is fully charged, the processor 4 controls the third switch 71 connected in parallel with the first battery to switch from the open state to the closed state, short-circuiting the first battery so that the battery system 1 no longer charges the first battery, thus preventing overcharging of the battery.

[0052] Referring to Figure 4 , in the case where the batteries in the battery pack are connected in series, as a possible implementation, the detection module 5 includes multiple detection terminals, and the multiple detection terminals are connected to the multiple batteries 21 in a one-to-one correspondence.

[0053] As a possible implementation, the charging information includes: the internal resistance of the battery, the charging time, and the voltage of the battery. The processor 4 is also configured to store the rated charging time and rated voltage of each battery 21 in the multiple batteries 21. After receiving the charging information, the processor 4 records the start time of charging the battery. When each battery reaches its corresponding rated charging time, the processor 4 controls the third switch 71 corresponding to the battery 21 to disconnect and stop charging.

[0054] Similar to the case of being connected in parallel with each battery 21 in the battery pack 2, the processor 4 can also determine the charging state of the battery based on the voltage of the battery 21 in the received charging information. When the voltage value is close to the rated voltage of the battery, it means that the battery 21 is fully charged, and at this time, the third switch 71 connected to the battery 21 is disconnected. When the voltage of the battery 21 is too different from the rated voltage of the battery 21, it indicates that the battery 21 is in an under-voltage state and will continue to be charged. The processor 4 comprehensively considers the charging time and voltage of the battery to confirm the charging status of the battery 21, improving the reliability and accuracy of the entire battery system.

[0055] The processor 4 can also determine the state of the battery based on the internal resistance of the battery 21 in the received charging information. As the usage time of the battery 21 continuously increases, the internal resistance of the battery 21 also continuously increases. The processor 4 can determine whether the battery needs to be replaced based on the internal resistance of the battery, thus ensuring the safety of the entire vehicle.

[0056] As a possible implementation, the processor is connected to the battery system. The battery system includes multiple power supply terminals, which are connected to multiple first switches in a one-to-one correspondence. The processor is also configured to: record the number of times each battery is charged, and when the number of times the battery is charged is greater than the first threshold, output a first signal to the battery system. The battery system is also configured to: receive the first signal, and according to the first signal, control the power supply terminal corresponding to the battery whose number of charges is greater than the first threshold to reduce the supply voltage. When the number of times the battery is charged is greater than the first threshold, it means that the battery has been charged and discharged for a large number of times, and its internal part has aged. If the battery is not replaced, the battery system needs to use low voltage to slowly charge the battery. The processor considers the state of the battery by comprehensively considering the internal resistance of the battery and the number of times the battery is charged and discharged, thereby improving the accuracy of the judgment. When the number of times the battery is charged and discharged is large, the battery system is controlled to reduce the output voltage of the corresponding power supply terminal, thereby ensuring the reliability and safety of the battery charging process, and further improving the life of the battery pack.

[0057] It should be noted that, refer to Figure 2 , Figure 3 as well as Figure 4 In the above figure, the connection between the processor 4 and the first switch module 3 means that the processor 4 is connected to each first switch 31 in the first switch module 3. For example, the first switch 31 is a field effect transistor, and the processor 4 is connected to the gate of the field effect transistor, and the gate is used to control whether the field effect transistor is turned on or off. Similarly, the connection between the processor 4 and the second switch module 6 means that the processor 4 is connected to each second switch 61 in the second switch module 6, and the connection between the processor 4 and the third switch module 7 means that the processor 4 is connected to each third switch 71 in the third switch module 7.

[0058] The present application also provides a vehicle, exemplarily, such as Figure 5 See Figure 5 When the batteries in the battery pack of the vehicle 100 are connected in parallel, the vehicle 100 may choose to use Figure 1 , picture or Figure 3 In the battery system 1 shown in FIG. 1 , when the batteries in the battery pack of the vehicle 100 are connected in series, the vehicle 100 may choose to adopt Figure 4 The battery system 1 shown in the figure. Since the vehicle is charged by the battery system provided by the present application, the battery overcharge phenomenon is prevented, so that the overall charging condition of the battery pack is optimized, the life of each battery in the battery pack is extended, and the life of the entire battery pack is also extended.

[0059] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A battery system (1), characterized in that, Comprising: A battery pack (2), the battery pack (2) including a plurality of batteries (21) connected in parallel with each other; A first switch module (3), the first switch module (3) including a plurality of first switches (31), the plurality of first switches (31) corresponding one-to-one to the plurality of batteries (21), one end of the first switch (31) being connected to the corresponding battery (21), and the other end of the first switch (31) being connected to the battery system (1); the battery system (1) being configured to charge the battery pack (2); A processor (4), connected to the first switch module (3); A detection module (5), connected to the processor (4) and also connected to the battery pack (2); The detection module (5) is configured to: obtain the charging information of each battery (21) in the battery pack (2) and send the charging information to the processor (4); The processor (4) is configured to: receive the charging information and control the opening or closing of the corresponding first switch (31) according to the charging information of each battery (21).

2. The battery system (1) according to claim 1, characterized in that, The battery system (1) further includes a second switch module; The second switch module (6) includes a plurality of second switches (61), the plurality of second switches (61) corresponding one-to-one to the plurality of batteries (21), one ends of the plurality of second switches (61) being connected to each other, and the other ends of the plurality of second switches (61) being connected to the corresponding batteries (21); The processor (4) is further configured to: control the opening or closing of the corresponding second switch (61) according to the charging information of each battery (21).

3. The battery system (1) according to claim 1, characterized in that, The battery system (1) further includes a second switch module (6); the battery pack (2) includes N batteries (21); The second switch (61) module includes N - 1 second switches (61), the N - 1 second switches (61) corresponding one-to-one to the N - 1 batteries (21), one ends of the N - 1 second switches (61) being connected to each other, and the other ends of the N - 1 second switches (61) being connected to the corresponding batteries (21); The processor (4) is further configured to: control the opening or closing of the corresponding second switch (61) according to the charging information of each battery (21).

4. The battery system (1) according to any one of claims 1 to 3, characterized in that, The detection module (5) includes a plurality of detection terminals (51), the plurality of detection terminals (51) being connected to the plurality of batteries (21) in a one-to-one correspondence.

5. The battery system (1) according to any one of claims 1 to 3, characterized in that, The charging information includes: the internal resistance of the battery (21), the charging time, and the voltage of the battery (21); The processor (4) is further configured to store the rated charging time and the rated voltage of each battery (21) among the plurality of batteries (21).

6. The battery system (1) according to any one of claims 1 to 3, characterized in that, The processor (4) is connected to the battery system (1); The battery system (1) includes a plurality of power supply terminals, the plurality of power supply terminals being connected to the plurality of first switches (31) in a one-to-one correspondence, The processor (4) is further configured to record the number of charging times of each of the batteries (21), and when the number of charging times of the battery (21) is greater than a first threshold, output a first signal to the battery system (1); The battery system (1) is further configured to receive the first signal and, according to the first signal, control the power supply voltage of the power supply terminal corresponding to the battery (21) with the number of charging times greater than the first threshold to be reduced.

7. A battery system (1), characterized in that, Comprising: A battery pack (2) connected to the battery system (1), the battery system (1) being configured to charge the battery pack (2), wherein the battery pack (2) includes a plurality of batteries (21) connected in series in sequence, A third switch module (7), the third switch module (7) including a plurality of third switches (71), the plurality of third switches (71) corresponding to the plurality of batteries (21) one by one, one end of the third switch (71) being connected to one pole of the corresponding battery (21), and the other end of the third switch (71) being connected to the other pole of the corresponding battery (21); A processor (4) connected to the third switch module (7); A detection module (5) connected to the processor (4) and also connected to the battery pack (2); The detection module (5) is configured to obtain the charging information of each battery (21) in the battery pack (2) and send the charging information to the processor (4); The processor (4) is configured to receive the charging information and control the corresponding third switch (71) to be turned on or off according to the charging information of each battery (21).

8. The battery system (1) according to claim 7, characterized in that, The detection module (5) includes a plurality of detection terminals (51), the plurality of detection terminals (51) being connected to the plurality of batteries (21) one by one.

9. The battery system (1) according to claim 7, characterized in that, The charging information includes: the internal resistance of the battery (21), the charging time, and the voltage of the battery (21); The processor (4) is further configured to store the rated charging time and rated voltage of each of the plurality of batteries (21) in the plurality of batteries (21).

10. The battery system (1) according to claim 7, characterized in that, The processor (4) is connected to the battery system (1); The battery system (1) includes a plurality of power supply terminals, the plurality of power supply terminals being connected to a plurality of first switches (31) one by one, The processor (4) is further configured to record the number of charging times of each of the batteries (21), and when the number of charging times of the battery (21) is greater than a first threshold, output a first signal to the battery system (1); The battery system (1) is further configured to receive the first signal and, according to the first signal, control the power supply voltage of the power supply terminal corresponding to the battery (21) with the number of charging times greater than the first threshold to be reduced.

11. A vehicle (100), characterized in that, Comprising the battery system (1) according to any one of claims 1 to 6, or the battery system (1) according to any one of claims 7 to 10.

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