Household energy storage battery management system

Abstract

The utility model discloses a household energy storage battery management system. The household energy storage battery management system comprises a controller, at least two battery packs and at least two acquisition boards, wherein the number of the acquisition boards is the same as that of the battery packs; the acquisition board comprises an acquisition port and a communication port; the battery packs are connected in series; each acquisition channel of the acquisition port of the acquisition board is connected with each battery cell in the battery pack in a one-to-one correspondence manner; the communication ports of the acquisition boards are connected in a daisy chain communication mode; the communication port of the first acquisition board or the communication port of the last acquisition board is also connected with the controller; the battery pack is used for storing energy; the acquisition board is used for acquiring cell data of cells in the battery pack; and the controller is used for processing the battery cell data and monitoring and managing the battery pack according to the processed battery cell data. The household energy storage battery management system provided by the embodiment of the utility model is beneficial to simplifying the complexity of communication wiring and reducing the cost of the energy storage battery management system.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, and in particular to a household energy storage battery management system. Background Art

[0002] With the development of distributed power generation technology, energy storage systems have gradually become a hot topic of concern. As the power of household appliances increases, household energy storage systems have gradually entered the public eye. Therefore, the research on household energy storage battery management systems has become the focus of research.

[0003] However, in the prior art, the communication wiring between the battery pack and the controller in the household energy storage battery management system is cumbersome and complicated, which results in a high cost of the energy storage battery management system. Utility Model Content

[0004] The utility model provides a household energy storage battery management system to simplify the complexity of communication wiring and reduce the cost of the energy storage battery management system.

[0005] The household energy storage battery management system comprises: a controller, at least two battery packs and at least two acquisition boards; wherein the number of the acquisition boards is the same as the number of the battery packs; the acquisition board comprises an acquisition port and a communication port;

[0006] The battery packs are connected in series; the acquisition channels of the acquisition ports of the acquisition board are connected one by one with the cells in the battery packs; the communication ports of the acquisition boards are connected in a daisy chain communication mode; the communication port of the first acquisition board or the communication port of the last acquisition board is also connected to the controller;

[0007] The battery pack is used for energy storage; the acquisition board is used for collecting cell data of the cells in the battery pack; the controller is used for processing the cell data and monitoring and managing the battery pack according to the processed cell data.

[0008] Optionally, the collection port includes at least one collection channel.

[0009] Optionally, one battery pack is connected to one acquisition board.

[0010] Optionally, the number of collection channels of the collection port of the collection board is the same as the number of battery cells in the battery pack.

[0011] Optionally, the acquisition board and the controller are connected by a network cable; and each acquisition board is connected by a network cable.

[0012] Optionally, the household energy storage battery management system further includes: an inverter, a contactor unit, a fuse unit and a switch unit;

[0013] The positive electrode of the first battery pack is connected to the first end of the switch unit; the negative electrode of the last battery pack is connected to the second end of the switch unit; the third end of the switch unit is connected to the first end of the insurance unit; the fourth end of the switch unit is connected to the second end of the insurance unit; the third end of the insurance unit is connected to the first end of the contactor unit; the fourth end of the insurance unit is connected to the second end of the contactor unit; the third end of the contactor unit is connected to the first DC end of the inverter; the fourth end of the contactor unit is connected to the second DC end of the inverter; the AC output end of the inverter is connected to the household circuit; the control end of the inverter, the control end of the contactor unit and the control end of the switch unit are all connected to the controller;

[0014] The inverter is used to convert direct current into alternating current; the contactor unit and the switch unit are used to control the output of the battery pack; and the insurance unit is used to prevent overload.

[0015] Optionally, the switch unit comprises: a first switch and a second switch;

[0016] The first end of the first knife switch serves as the first end of the switch unit; the second end of the first knife switch serves as the third end of the switch unit; the first end of the second knife switch serves as the second end of the switch unit; and the second end of the second knife switch serves as the fourth end of the switch unit.

[0017] Optionally, the insurance unit comprises: a first fuse and a second fuse;

[0018] The first end of the first fuse serves as the first end of the insurance unit; the second end of the first fuse serves as the third end of the insurance unit; the first end of the second fuse serves as the second end of the insurance unit; and the second end of the second fuse serves as the fourth end of the insurance unit.

[0019] Optionally, the contactor unit includes: a first contactor, a second contactor, a third contactor, a Hall sensor and a pre-charging resistor;

[0020] The first end of the first contactor serves as the first end of the contactor unit; the second end of the first contactor serves as the third end of the contactor unit; the first end of the Hall sensor serves as the second end of the contactor unit; the second end of the Hall sensor is connected to the first end of the second contactor; the second end of the second contactor serves as the fourth end of the contactor unit; the first end of the third contactor is connected to the first end of the first contactor; the second end of the third contactor is connected to the first end of the pre-charging resistor; and the second end of the pre-charging resistor is connected to the second end of the first contactor.

[0021] The acquisition boards of the embodiment of the utility model are connected by daisy chain communication, and the first acquisition board or the last acquisition board is also connected to the controller; the acquisition board collects the cell data of each cell in the battery pack, and the controller obtains and processes the cell data, thereby monitoring and managing the battery pack. Compared with the prior art, the acquisition board of the embodiment of the utility model only collects the data of the cells in the battery pack, and the acquisition boards are connected by daisy chain communication, which is conducive to simplifying the complexity of communication wiring and reducing the cost of energy storage battery management system.

[0022] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present utility model, nor are they intended to limit the scope of the present utility model. Other features of the present utility model will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a schematic diagram of a household energy storage battery management system provided by an embodiment of the utility model;

[0025] Figure 2 It is a schematic diagram of another household energy storage battery management system provided by an embodiment of the utility model. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0028] The embodiment of the utility model provides a household energy storage battery management system. The acquisition board of the household energy storage battery management system only collects data of the battery cells in the battery pack, and each acquisition board is connected by a daisy chain communication method, which is conducive to simplifying the complexity of communication wiring and reducing the cost of the energy storage battery management system. Figure 1 Schematic diagram of a household energy storage battery management system provided by the embodiment of the utility model. Figure 1 The household energy storage battery management system includes: a controller 110, at least two battery packs 120 and at least two acquisition boards 130. The number of acquisition boards 130 is the same as the number of battery packs 120; the acquisition board 130 includes an acquisition port and a communication port.

[0029] The battery packs 120 are connected in series; the acquisition channels of the acquisition port of the acquisition board 130 are connected one-to-one with the battery cells 121 in the battery pack 120; the communication ports of the acquisition boards 130 are connected in a daisy chain communication manner; the communication port of the first acquisition board 130 or the communication port of the last acquisition board 130 is also connected to the controller 110; the battery pack 120 is used for energy storage; the acquisition board 130 is used to collect the cell data of the battery cells 121 in the battery pack 120; the controller 110 is used to process the cell data, and monitor and manage the battery pack 120 according to the processed cell data.

[0030] Specifically, each battery pack 120 is connected in series to achieve efficient energy storage. Each acquisition channel of the acquisition board 130 is connected to the battery cell 121 in the battery pack 120 in a one-to-one correspondence to collect the cell data of the battery cell 121 in the battery pack 120. Among them, each acquisition channel of the acquisition board 130 corresponds to a battery cell 121, and one acquisition channel only collects the cell data of one battery cell 121. Exemplarily, the battery cell data includes but is not limited to the voltage of the battery cell 121 and the temperature of the battery cell 121.

[0031] After the acquisition board 130 acquires the cell data through each acquisition channel, the controller 110 acquires the cell data through the communication port of the acquisition board 130. It should be noted that the acquisition board 130 only acquires the cell data of the cell 121 in the battery pack 120, and does not process the acquired cell data. After the controller 110 acquires the cell data, it processes the cell data, and evaluates the state of the cell 121 in the battery pack 120 through the processed cell data, thereby obtaining the state of the battery pack 120. After acquiring the state of the battery pack 120, the controller 110 manages the battery pack 120 according to the state of the battery pack 120, such as balancing the power of each battery pack 120 in the battery pack, optimizing the charging process of the battery pack 120, or controlling the discharge depth and rate of the battery pack 120.

[0032] The acquisition boards 130 of the embodiment of the utility model are connected by daisy chain communication, and the first acquisition board 130 or the last acquisition board 130 is also connected to the controller 110; the acquisition board 130 collects the cell data of each cell 121 in the battery pack 120, and the controller 110 obtains and processes the cell data, thereby monitoring and managing the battery pack 120. Compared with the prior art, the acquisition board 130 of the embodiment of the utility model only collects the data of the cell 121 in the battery pack 120, and the acquisition boards 130 are connected by daisy chain communication, which is conducive to simplifying the complexity of communication wiring and reducing the cost of the energy storage battery management system.

[0033] Based on the above embodiment, optionally, the collection port of the collection board 130 includes at least one collection channel.

[0034] Specifically, the acquisition channel is an important component of the battery cell data acquisition in the energy storage battery management system. It is used to collect the battery cell data of the battery cell 121. There is at least one acquisition channel in the acquisition port of the acquisition board 130, and each acquisition channel can independently collect the battery cell data of the battery cell 121 in the battery pack 120.

[0035] Based on the above embodiments, optionally, one battery pack 120 is connected to one acquisition board 130 .

[0036] Specifically, each acquisition channel of the acquisition port of the acquisition board 130 is connected to the same battery pack 120, that is, the acquisition board 130 only collects the cell data of the battery cells 121 in one battery pack 120. This connection method is conducive to the evaluation of the state of the battery pack 120 and improves the monitoring efficiency of the battery pack 120.

[0037] On the basis of the above embodiments, optionally, the number of collection channels of the collection port of the collection board 130 is the same as the number of battery cells 121 in the battery pack 120 .

[0038] Specifically, the number of collection channels of the collection port of the collection board 130 is the same as the number of battery cells 121 in the battery pack 120, which is conducive to avoiding redundancy of the collection channels of the collection port of the collection board 130, improving the utilization rate of the collection board 130, and further reducing the cost of the energy storage battery management system.

[0039] On the basis of the above embodiments, optionally, the acquisition board 130 and the controller 110 are connected by a network cable; and each acquisition board 130 is connected by a network cable.

[0040] Specifically, each acquisition board 130 uses daisy chain communication and is connected via a network cable, and the acquisition board 130 and the controller also use network cable communication. There is no need to customize the communication cables, which is conducive to further reducing the cost of the energy storage battery management system.

[0041] Figure 2 It is a schematic diagram of another household energy storage battery management system provided by the embodiment of the utility model. Based on the above embodiments, optionally, refer to Figure 2 The household energy storage battery management system also includes: an inverter 140 , a contactor unit 150 , a fuse unit 160 and a switch unit 170 .

[0042] The positive pole of the first battery pack 120 is connected to the first end of the switch unit 170; the negative pole of the last battery pack 120 is connected to the second end of the switch unit 170; the third end of the switch unit 170 is connected to the first end of the fuse unit 160; the fourth end of the switch unit 170 is connected to the second end of the fuse unit 160; the third end of the fuse unit 160 is connected to the first end of the contactor unit 150; the fourth end of the fuse unit 160 is connected to the second end of the contactor unit 150; the third end of the contactor unit 150 is connected to the first DC end of the inverter 140; the fourth end of the contactor unit 150 is connected to the second DC end of the inverter 140; the AC output end of the inverter 140 is connected to the household circuit; the control end of the inverter 140, the control end of the contactor unit 150 and the control end of the switch unit 170 are all connected to the controller 110. The inverter 140 is used to convert direct current into alternating current; the contactor unit 150 and the switch unit 170 are used to control the output of the battery pack 120; and the insurance unit 160 is used to prevent overload.

[0043] Specifically, the controller 110 controls the on and off of the switch unit 170 and the contactor unit 150 according to the state of the battery pack 120, and controls the output of the inverter 140 according to the needs of the user circuit and the state of the battery pack 120. Exemplarily, the connection between the switch unit 170 and the controller 110, the connection between the contactor unit 150 and the controller 110, and the connection between the inverter 140 and the controller can be connected by CAN bus. Among them, CAN bus (Controller Area Network) is a serial communication protocol bus for real-time applications, which can use twisted pair to transmit signals. The CAN bus can provide integrity serial data communication, provide real-time support, a transmission rate of up to 1Mb / s, and 11-bit addressing and error detection capabilities.

[0044] Based on the above embodiments, optionally, continue to refer to Figure 2 The switch unit 170 includes: a first switch QS1 and a second switch QS2.

[0045] The first end of the first knife switch QS1 serves as the first end of the switch unit 170 ; the second end of the first knife switch QS1 serves as the third end of the switch unit 170 ; the first end of the second knife switch QS2 serves as the second end of the switch unit 170 ; and the second end of the second knife switch QS2 serves as the fourth end of the switch unit 170 .

[0046] Based on the above embodiments, optionally, continue to refer to Figure 2 The insurance unit 160 includes: a first fuse FU1 and a second fuse FU2.

[0047] The first end of the first fuse FU1 serves as the first end of the insurance unit 160 ; the second end of the first fuse FU1 serves as the third end of the insurance unit 160 ; the first end of the second fuse FU2 serves as the second end of the insurance unit 160 ; the second end of the second fuse FU2 serves as the fourth end of the insurance unit 160 .

[0048] Based on the above embodiments, optionally, continue to refer to Figure 2 The contactor unit 150 includes: a first contactor KM1, a second contactor KM2, a third contactor KM3, a Hall sensor HALL and a pre-charging resistor Pre-R.

[0049] The first end of the first contactor KM1 serves as the first end of the contactor unit 150; the second end of the first contactor KM1 serves as the third end of the contactor unit 150; the first end of the Hall sensor HALL serves as the second end of the contactor unit 150; the second end of the Hall sensor HALL is connected to the first end of the second contactor KM2; the second end of the second contactor KM2 serves as the fourth end of the contactor unit 150; the first end of the third contactor KM3 is connected to the first end of the first contactor KM1; the second end of the third contactor KM3 is connected to the first end of the pre-charging resistor Pre-R; the second end of the pre-charging resistor Pre-R is connected to the second end of the first contactor KM1.

[0050] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0051] The above specific implementations do not constitute a limitation on the protection scope of the present utility model. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A household energy storage battery management system, It is characterized in that include: A controller, at least two battery packs and at least two acquisition boards; wherein the number of the acquisition boards is the same as the number of the battery packs; the acquisition board comprises an acquisition port and a communication port; The battery packs are connected in series; the acquisition channels of the acquisition ports of the acquisition board are connected one by one with the cells in the battery packs; the communication ports of the acquisition boards are connected in a daisy chain communication mode; the communication port of the first acquisition board or the communication port of the last acquisition board is also connected to the controller; The battery pack is used for energy storage; the acquisition board is used for collecting cell data of the cells in the battery pack; the controller is used for processing the cell data and monitoring and managing the battery pack according to the processed cell data.

2. The household energy storage battery management system according to claim 1, It is characterized in that The collection port includes at least one collection channel.

3. The household energy storage battery management system according to claim 2, It is characterized in that One battery pack is correspondingly connected to one acquisition board.

4. The household energy storage battery management system according to claim 2, It is characterized in that The number of collection channels of the collection port of the collection board is the same as the number of battery cells in the battery pack.

5. The household energy storage battery management system according to claim 1, It is characterized in that The acquisition board and the controller are connected by a network cable; and the acquisition boards are connected by a network cable.

6. The household energy storage battery management system according to claim 1, It is characterized in that Also includes: Inverter, contactor unit, fuse unit and switch unit; The positive electrode of the first battery pack is connected to the first end of the switch unit; the negative electrode of the last battery pack is connected to the second end of the switch unit; the third end of the switch unit is connected to the first end of the insurance unit; the fourth end of the switch unit is connected to the second end of the insurance unit; the third end of the insurance unit is connected to the first end of the contactor unit; the fourth end of the insurance unit is connected to the second end of the contactor unit; the third end of the contactor unit is connected to the first DC end of the inverter; the fourth end of the contactor unit is connected to the second DC end of the inverter; the AC output end of the inverter is connected to the household circuit; the control end of the inverter, the control end of the contactor unit and the control end of the switch unit are all connected to the controller; The inverter is used to convert direct current into alternating current; the contactor unit and the switch unit are used to control the output of the battery pack; and the insurance unit is used to prevent overload.

7. The household energy storage battery management system according to claim 6, It is characterized in that The switch unit comprises: a first switch and a second switch; The first end of the first knife switch serves as the first end of the switch unit; the second end of the first knife switch serves as the third end of the switch unit; the first end of the second knife switch serves as the second end of the switch unit; and the second end of the second knife switch serves as the fourth end of the switch unit.

8. The household energy storage battery management system according to claim 6, It is characterized in that The insurance unit comprises: a first fuse and a second fuse; The first end of the first fuse serves as the first end of the insurance unit; the second end of the first fuse serves as the third end of the insurance unit; the first end of the second fuse serves as the second end of the insurance unit; and the second end of the second fuse serves as the fourth end of the insurance unit.

9. The household energy storage battery management system according to claim 6, It is characterized in that The contactor unit comprises: a first contactor, a second contactor, a third contactor, a Hall sensor and a pre-charging resistor; The first end of the first contactor serves as the first end of the contactor unit; the second end of the first contactor serves as the third end of the contactor unit; the first end of the Hall sensor serves as the second end of the contactor unit; the second end of the Hall sensor is connected to the first end of the second contactor; the second end of the second contactor serves as the fourth end of the contactor unit; the first end of the third contactor is connected to the first end of the first contactor; the second end of the third contactor is connected to the first end of the pre-charging resistor; and the second end of the pre-charging resistor is connected to the second end of the first contactor.

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