Battery management device, battery system and automobile

Abstract

The utility model discloses a battery management device, a battery system and an automobile. The battery management device comprises a battery interface group, a load interface and a main control circuit, the battery interface group comprises a positive electrode end, a negative electrode end and a plurality of battery interfaces; the positive electrode end, positive electrodes and negative electrodes of the plurality of battery interfaces and the negative electrode end are sequentially connected in series; the battery interface is used for being detachably connected with a battery pack; the load interface is connected with the anode end and the cathode end of the battery interface group; the load interface is used for accessing a load; the main control circuit is electrically connected with the plurality of battery interfaces, and the main control circuit is used for being in communication connection with a battery pack accessed by the main control circuit through the battery interfaces; the main control circuit is used for controlling the plurality of accessed battery packs to work through the plurality of battery interfaces, so that the plurality of accessed battery packs output first voltage through the load interface or receive charging voltage through the load interface. The battery management device provided by the utility model can be compatible with battery packs of different types of new energy automobiles, so that resource waste is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy automobile power supply, and in particular to a battery management device, a battery system and an automobile. Background Art

[0002] The current battery packs of new energy electric vehicles are often not compatible with the platforms of other types of new energy vehicles. For other types of new energy vehicles, specially designed battery packs are required, resulting in a waste of resources. Utility Model Content

[0003] The main purpose of the utility model is to provide a battery management device, which is designed to be compatible with battery packs of different types of new energy vehicles, thereby reducing resource waste.

[0004] To achieve the above-mentioned purpose, the battery management device proposed by the utility model includes:

[0005] A battery interface group, the battery interface group comprising a positive terminal, a negative terminal and a plurality of battery interfaces, the positive terminal, the positive and negative electrodes of the plurality of battery interfaces and the negative terminal being sequentially connected in series; the battery interface being used for detachable connection with a battery pack;

[0006] A load interface, the load interface being connected to the positive terminal and the negative terminal of the battery interface group; the load interface being used to access a load;

[0007] A main control circuit, the main control circuit being electrically connected to the plurality of battery interfaces respectively, and the main control circuit being used for communicating with the battery pack connected thereto via the battery interfaces;

[0008] The main control circuit is used to control the operation of the multiple connected battery packs through the multiple battery interfaces, so that the multiple connected battery packs output the first voltage through the load interface or receive the charging voltage through the load interface.

[0009] In one embodiment, the battery interface has a communication terminal, and the communication terminal is used to be electrically connected to the communication terminal of the battery pack when the battery interface is connected to the battery pack;

[0010] The main control circuit comprises:

[0011] Main controller;

[0012] A communication module, the communication module is respectively connected to the main controller and the communication terminals of the plurality of battery interfaces;

[0013] The main controller is used to communicate with the battery pack connected to the battery interface via the communication module and the communication terminal.

[0014] In one embodiment, the communication module includes:

[0015] A bus communication circuit, the bus communication circuit is electrically connected to the main controller;

[0016] A communication bus, wherein the bus communication circuit and the communication ends of the plurality of battery interfaces are electrically connected to the communication bus respectively.

[0017] In one embodiment, the battery management device further includes:

[0018] A switch circuit, wherein a controlled end of the switch circuit is electrically connected to the main control circuit, and the switch circuit is connected in series in a path between the battery interface group and the load interface;

[0019] The main control circuit is used to control the operation of the switch circuit.

[0020] In one embodiment, there are multiple battery interface groups, and the multiple battery interface groups are connected in parallel with the load interface.

[0021] In one embodiment, the number of the battery interface groups is three, each of the battery interface groups includes a positive terminal, a negative terminal and two battery interfaces connected in series in sequence, and the three battery interface groups are connected in parallel with the load interface.

[0022] In addition, to achieve the above-mentioned purpose, the present invention also proposes a battery system, including a plurality of battery packs and the battery management device as described above.

[0023] In one embodiment, the battery pack comprises:

[0024] Battery cells;

[0025] A controller, the controller being electrically connected to a main control circuit of the battery management device;

[0026] A switch, a controlled end of the switch is electrically connected to the controller, and the switch is connected in series in a path between the controller and the battery cell;

[0027] The controller is used to control the operation of the switch.

[0028] In one embodiment, the voltage of the battery pack is 48V or 60V.

[0029] In addition, to achieve the above-mentioned purpose, the utility model also provides a car, comprising the battery management device as described above;

[0030] Alternatively, comprising a battery system as described above.

[0031] The technical solution of the utility model is provided by setting a battery interface group, a load interface and a main control circuit; the battery interface group includes a positive terminal, a negative terminal and multiple battery interfaces, the positive terminal, the positive and negative terminals of the multiple battery interfaces and the negative terminal are connected in series in sequence; the battery interface is used for detachable connection with the battery pack; the load interface is connected to the positive and negative terminals of the battery interface group; the load interface is used to connect to the load; the main control circuit is electrically connected to the multiple battery interfaces respectively. The main control circuit of the technical solution of the utility model is used to communicate with the battery pack connected to it via the battery interface, and when receiving the charging control signal output by the vehicle controller of the new energy vehicle, control the connected battery pack to receive the charging voltage output by the load via the load interface; when receiving the discharge control signal output by the vehicle controller of the new energy vehicle, control the connected battery pack to output the first voltage to the load via the load interface, thereby realizing the charging and discharging function of the battery pack. In addition, the main control circuit can also selectively control the on or off of the switches of multiple connected battery packs through multiple battery interfaces to achieve series and parallel connection of multiple battery packs, so that battery packs of different types of new energy vehicles can be used compatibly. There is no need to specially design dedicated battery packs for different types of new energy vehicles, thereby reducing the waste of resources caused by incompatible battery packs. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0033] Figure 1 This is a schematic diagram of a circuit function module of an embodiment of a battery management device of the utility model;

[0034] Figure 2 This is a schematic diagram of the circuit function module structure of another embodiment of the battery management device of the utility model;

[0035] Figure 3 This is a schematic diagram of the circuit function module structure of another embodiment of the battery management device of the utility model;

[0036] Figure 4 This is a schematic diagram of the circuit function module structure of another embodiment of the battery management device of the utility model;

[0037] Figure 5 This is a schematic diagram of a circuit function module of an embodiment of a battery system of the utility model;

[0038] Figure 6 This is a circuit diagram of an embodiment of the battery system of the utility model;

[0039] Figure 7 FIG. 2 is a circuit diagram of another embodiment of the battery system of the present invention.

[0040] Description of Figure Numbers:

[0041] Label name Label name 1 Battery System 131 Main Controller 2 load 132 Communication Module 10 Battery Management Device 132a Bus communication circuit 20 Battery Pack 132b Communication Bus 11 Battery interface group 14 Switching Circuit 111 Battery interface 21 Battery Cell 12 Load interface 22 Controller 13 Main control circuit 23 switch

[0042] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0044] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0045] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0046] It is understandable that the current battery packs 20 of new energy electric vehicles are often not compatible with the platforms of other types of new energy vehicles. For example, the high-voltage power supply used in new energy electric vehicles is generally an independent battery pack 20 of 96V or above, while the battery pack 20 used in new energy electric two-wheeled vehicles is generally a 48V battery pack 20 or a 60V battery pack 20. That is, for different types of new energy vehicles, special battery packs 20 need to be specially designed, which causes waste of resources.

[0047] To this end, the present invention proposes a battery management device 10, which is intended to be compatible with battery packs 20 of different types of new energy vehicles, thereby reducing resource waste.

[0048] In one embodiment of the present invention, combined with Figure 1 and Figure 6 , the battery management device 10 comprises:

[0049] A battery interface group 11, the battery interface group 11 comprising a positive terminal, a negative terminal and a plurality of battery interfaces 111, the positive terminal, the positive and negative electrodes of the plurality of battery interfaces 111 and the negative terminal are sequentially connected in series; the battery interface 111 is used to be detachably connected to the battery pack 20;

[0050] A load 2 interface, the load 2 interface is connected to the positive terminal and the negative terminal of the battery interface group 11; the load 2 interface is used to access the load 2;

[0051] A main control circuit 13, wherein the main control circuit 13 is electrically connected to the plurality of battery interfaces 111 respectively, and the main control circuit 13 is used for communicating with the battery pack 20 connected thereto via the battery interface 111;

[0052] The main control circuit 13 is used to control the operation of the multiple connected battery packs 20 through the multiple battery interfaces 111, so that the multiple connected battery packs 20 output the first voltage through the load 2 interface or receive the charging voltage through the load 2 interface.

[0053] In this embodiment, the battery interface group 11 includes a positive terminal, a negative terminal and multiple battery interfaces 111, and the positive terminal, the positive and negative terminals of the multiple battery interfaces 111 and the negative terminal are connected in series in sequence, wherein each battery interface 111 is used for detachable connection with the battery pack 20.

[0054] In this embodiment, the positive terminal and the negative terminal of the battery interface group 11 are also connected to the interface of the load 2, so that a charge and discharge loop is formed between the battery pack 20 and the load 2, so that the battery pack 20 can discharge the load 2, or the load 2 can charge the battery pack 20. Optionally, the load 2 is an electric device or a charging device, the electric device can be a vehicle controller 22, etc., and the charging device can be a charger, etc. If the load 2 is an electric device, the battery pack 20 supplies power to the load 2 through the battery interface group 11; if the load 2 is a charging device, the load 2 charges the battery pack 20 through the battery interface group 11.

[0055] In this embodiment, the main control circuit 13 is electrically connected to the multiple battery interfaces 111 of the battery interface group 11, and serves as the control center of the battery management device 10 of this embodiment. It is mainly used to communicate with the corresponding connected battery pack 20 through each battery interface 111, and control the corresponding connected battery pack 20 to work through each battery interface 111 when receiving the control signal output by the vehicle controller 22 of the new energy vehicle. If the control signal received by the main control circuit 13 is a discharge control signal, the switches 23 of the multiple connected battery packs 20 are controlled to be turned on, so that the multiple battery packs 20 output the first voltage to the load 2 through the load 2 interface to supply power to the load 2; if the control signal received by the main control circuit 13 is a charging control signal, the switches 23 of the multiple connected battery packs 20 are controlled to be turned on, so that the multiple battery packs 20 receive the charging voltage output by the load 2 through the load 2 interface to charge the multiple battery packs 20.

[0056] It is worth noting that each battery interface is not limited to connecting to one battery pack. When each battery interface is connected to multiple battery packs, the multiple battery packs can be connected in series or in parallel; or, the multiple battery packs are set as multiple parallel branches, and the multiple battery packs in each parallel branch are connected in series, and the types of battery packs in the same parallel branch are the same, and the types of battery packs in different parallel branches are different. For example, when the multiple battery packs in this embodiment are set as the first parallel branch and the second parallel branch, the battery pack in the first parallel branch can be a battery pack with a voltage of 48V, and the battery pack in the second parallel branch can be a battery pack with a voltage of 60V. At this time, the main control circuit can selectively control the switch of the battery pack in the first parallel branch and / or the switch of the battery pack in the second parallel branch through multiple battery interfaces to turn on or off, so as to realize the series and parallel connection of different types of battery packs, so that the battery packs of different types of new energy vehicles can be used compatibly, and there is no need to specially design dedicated battery packs for different types of new energy vehicles, thereby reducing the phenomenon of resource waste caused by incompatible battery packs.

[0057] The technical solution of the utility model proposes a battery management device 10, a battery system 1 and a car, wherein the battery management device 10 includes a battery interface group 11, a load 2 interface and a main control circuit 13; the battery interface group 11 includes a positive terminal, a negative terminal and a plurality of battery interfaces 111, and the positive terminal, the positive and negative terminals of the plurality of battery interfaces 111 and the negative terminal are sequentially connected in series; the battery interface 111 is used for detachable connection with the battery pack 20; the load 2 interface is connected to the positive terminal and the negative terminal of the battery interface group 11; the load 2 interface is used for accessing the load 2; the main control circuit 13 is respectively electrically connected to the plurality of battery interfaces 111, and the main control circuit 13 is used for communicating and connecting with the battery pack 20 connected thereto via the battery interface 111; the main control circuit 13 is used for controlling the operation of the plurality of connected battery packs 20 via the plurality of battery interfaces 111, so that the plurality of connected battery packs 20 output the first voltage via the load 2 interface or receive the charging voltage via the load 2 interface. The battery management device 10 provided in the utility model can be compatible with the battery packs 20 of different types of new energy vehicles, thereby reducing resource waste.

[0058] Optionally, in an embodiment of the present utility model, referring to Figure 2 The battery interface 111 has a communication terminal, and the communication terminal is used to be electrically connected to the communication terminal of the battery pack 20 when the battery interface 111 is connected to the battery pack 20;

[0059] The main control circuit 13 includes:

[0060] Main controller 131;

[0061] A communication module 132, wherein the communication module 132 is respectively connected to the main controller 131 and the communication terminals of the plurality of battery interfaces 111;

[0062] The main controller 131 is used to communicate with the battery pack 20 connected to the battery interface 111 via the communication module 132 and the communication terminal.

[0063] In this embodiment, each battery interface 111 of the battery interface group 11 has a communication terminal. Each communication terminal is used to electrically connect to the communication terminal of the corresponding battery pack 20 when the corresponding battery interface 111 is connected to the battery pack 20. Further, in order to establish a communication connection between the main control circuit 13 and multiple battery packs 20, the main control circuit 13 of this embodiment includes a main controller 131 and a communication module 132. Among them, the main controller 131 can be a main control chip, such as MCU (Microcontroller Unit), DSP (Digital Signal Process), FPGA (Field Programmable Gate Array), SOC (System On Chip), etc. The communication module 132 can be implemented by a wired communication module 132, such as an RS485 communication module 132 or an SPI communication module 132. It is worth noting that the wired communication module 132 includes multiple transceiver circuits, one end of the multiple transceiver circuits is connected to the main controller 131, and the other end of the multiple transceiver circuits is connected to the communication end of the multiple battery interfaces 111 in a one-to-one correspondence. In this way, the main controller 131 can establish communication connections with multiple battery packs 20 through multiple transceiver circuits and the communication ends of multiple battery interfaces 111 in sequence. Moreover, since the wired communication module 132 such as the RS485 communication module 132 or the SPI communication module 132 communicates through a communication protocol, the reliability and stability of the signal transmission of the battery management device 10 can be improved.

[0064] Optionally, in an embodiment of the present utility model, referring to Figure 3 , the communication module 132 includes:

[0065] A bus communication circuit 132a, wherein the bus communication circuit 132a is electrically connected to the main controller 131;

[0066] The communication bus 132b, the bus communication circuit 132a, and the communication ends of the plurality of battery interfaces 111 are electrically connected to the communication bus 132b respectively.

[0067] In this embodiment, the communication module 132 can be implemented by a CAN module, and the corresponding bus communication circuit 132a and communication bus 132b are a CAN bus circuit and a CAN bus, respectively. The CAN bus circuit is electrically connected to the main controller, one end of the CAN bus is electrically connected to the CAN bus circuit, and the other end of the CAN bus is electrically connected to the communication ends of the multiple battery interfaces 111. Compared with other communication modules 132, such as RS485 communication module 132 or SPI communication module 132, the bus communication module 132 such as the CAN module has only one transceiver circuit and one bus, which can not only ensure the stability of signal transmission, but also make the circuit architecture of the battery management device 10 simpler, which is conducive to saving the cost and space of the battery management device 10.

[0068] Optionally, in an embodiment of the present utility model, referring to Figure 4 , the battery management device 10 further includes:

[0069] A switch circuit 14, wherein a controlled end of the switch circuit 14 is electrically connected to the main control circuit 13, and the switch circuit 14 is connected in series in a path between the battery interface group 11 and the load 2 interface;

[0070] The main control circuit 13 is used to control the operation of the switch circuit 14 .

[0071] In this embodiment, the switch circuit 14 may be composed of a single or multiple switch elements, and the switch element may be a MOS tube, an IGBT or a thyristor. Through the switching action of the switch element, the battery management device 10 can achieve stable and reliable operation. Specifically, the switch circuit 14 is implemented by a MOS tube, and the main control circuit 13 can output an on signal or an off signal to the MOS tube to control the MOS tube to be on or off.

[0072] When multiple battery interfaces 111 of the battery interface group 11 are all connected to the battery pack 20, when an abnormality occurs in the switch of at least one battery pack 20 among the multiple battery packs 20, the main control circuit 13 can output a shutdown signal to the switch circuit 14 to cause the switch circuit 14 to disconnect the path between the battery pack 20 and the load 2, thereby improving the safety of the battery management device 10.

[0073] Optionally, in one embodiment of the present utility model, in combination with Figure 1 and Figure 7 The number of the battery interface groups 11 is multiple, and the multiple battery interface groups 11 are connected in parallel with the load 2 interface.

[0074] In this embodiment, there are multiple battery interface groups 11, and multiple battery interface groups 11 are connected in parallel with the load 2 interface, that is, the battery management device 10 of this embodiment is provided with multiple parallel branches. With such a configuration, the new energy vehicle can selectively conduct at least one of the multiple parallel branches according to the actual power demand. Optionally, the number of battery interface groups 11 is generally not limited. In a preferred embodiment, refer to Figure 7 The number of battery interface groups 11 is three, each battery interface group 11 includes a positive terminal, a negative terminal and two battery interfaces 111 connected in series in sequence, and the three battery interface groups 11 are connected in parallel with the load 2 interface.

[0075] The utility model also proposes a battery system 1, which includes multiple battery packs 20 and a battery management device 10. The specific structure of the battery management device 10 refers to the above embodiment. Since the battery system 1 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0076] Optionally, in an embodiment of the present utility model, referring to Figure 5 Each battery pack 20 includes a controller 22, a switch 23, and a battery cell 21. The controller 22 of each battery pack 20 is electrically connected to the main control circuit 13 of the battery management device 10 through the corresponding battery interface 111, and the controller 22 of each battery pack 20 forms a path with the corresponding battery cell 21; the switch 23 of each battery pack 20 is connected in series in the corresponding path, and the controlled end of the switch 23 of each battery pack 20 is electrically connected to the control end of the corresponding controller 22.

[0077] In actual applications, when the controller 22 of each battery pack 20 receives a control signal output by the main control circuit 13 through the corresponding battery interface 111, the controller 22 controls the corresponding battery pack 20 to output a first voltage to the load 2 through the battery interface 111 and the load 2 interface in turn according to the control signal, or to receive the charging voltage output by the load 2 through the load 2 interface and the battery interface 111 in turn.

[0078] Optionally, in an embodiment of the present invention, the voltage of each battery pack 20 may be 48V or 60V, which is not specifically limited herein.

[0079] The utility model also proposes a car, which includes a battery management device 10 or a battery system 1. The specific structures of the battery management device 10 and the battery system 1 refer to the above embodiments. Since the car adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0080] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A battery management device, characterized in that: include: A battery interface group, the battery interface group comprising a positive terminal, a negative terminal and a plurality of battery interfaces, the positive terminal, the positive and negative electrodes of the plurality of battery interfaces and the negative terminal being sequentially connected in series; the battery interface being used for detachable connection with a battery pack; A load interface, the load interface being connected to the positive terminal and the negative terminal of the battery interface group; the load interface being used to access a load; A main control circuit, the main control circuit being electrically connected to the plurality of battery interfaces respectively, and the main control circuit being used for communicating with the battery pack connected thereto via the battery interfaces; The main control circuit is used to control the operation of the multiple connected battery packs through the multiple battery interfaces, so that the multiple connected battery packs output the first voltage through the load interface or receive the charging voltage through the load interface.

2. The battery management device according to claim 1, characterized in that: The battery interface has a communication terminal, and the communication terminal is used to be electrically connected to the communication terminal of the battery pack when the battery interface is connected to the battery pack; The main control circuit comprises: Main controller; A communication module, the communication module is respectively connected to the main controller and the communication terminals of the plurality of battery interfaces; The main controller is used to communicate with the battery pack connected to the battery interface via the communication module and the communication terminal.

3. The battery management device according to claim 2, characterized in that: The communication module comprises: A bus communication circuit, the bus communication circuit is electrically connected to the main controller; A communication bus, wherein the bus communication circuit and the communication ends of the plurality of battery interfaces are electrically connected to the communication bus respectively.

4. The battery management device according to claim 1, characterized in that: The battery management device further comprises: A switch circuit, wherein a controlled end of the switch circuit is electrically connected to the main control circuit, and the switch circuit is connected in series in a path between the battery interface group and the load interface; The main control circuit is used to control the operation of the switch circuit.

5. The battery management device according to any one of claims 1 to 4, characterized in that: There are multiple battery interface groups, and the multiple battery interface groups are connected in parallel with the load interface.

6. The battery management device according to claim 5, characterized in that: The number of the battery interface groups is three, each of the battery interface groups comprises a positive terminal, a negative terminal and two battery interfaces connected in series in sequence, and the three battery interface groups are connected in parallel with the load interface.

7. A battery system, characterized in that: The invention comprises a plurality of battery packs and a battery management device as claimed in any one of claims 1 to 6.

8. The battery system according to claim 7, characterized in that: The battery pack comprises: Battery cells; A controller, the controller being electrically connected to a main control circuit of the battery management device; A switch, a controlled end of the switch is electrically connected to the controller, and the switch is connected in series in a path between the controller and the battery cell; The controller is used to control the operation of the switch.

9. The battery system according to claim 7, characterized in that: The voltage of the battery pack is 48V or 60V.

10. An automobile, characterized in that: Comprising a battery management device as described in any one of claims 1 to 6; Alternatively, it comprises a battery system as described in any one of claims 7-9.

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