Redundant power supply system applied to energy storage battery management module

Abstract

The utility model belongs to the technical field of battery management, and particularly discloses a redundant power supply system applied to an energy storage battery management module, which comprises a battery PACK, a battery management module and a POE power supply system. The battery PACK is connected with the electricity taking wire to serve as a main power supply loop; the POE power supply system comprises at least one POE power supply link, and when the number of the POE power supply links is larger than 1, different POE power supply links are sequentially connected through network cables to serve as a redundant power supply loop; and the battery management module is connected with the battery PACK through a power taking wire, is connected with a POE power supply system through a POE power supply bus, and is used for realizing switching between the main power supply loop and the redundant power supply loop. The redundant power supply system applied to the energy storage battery management module provided by the utility model can improve the power supply reliability of the energy storage battery management system and simplify the wiring complexity of redundant power supply.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy storage battery management power supply system, concretely relates to a kind of redundancy power supply system applied to energy storage battery management module, belong to battery management technical field. BACKGROUND

[0002] Battery management system, main function is the state of battery detection, the most important is the single cell voltage of battery, system current, single cell temperature, residual capacity, battery health status and other key parameters, and according to battery state and operation demand management battery charging and discharging process, to ensure that battery runs under the condition of safety, high efficiency and long life.

[0003] As backup power supply of key business, battery management system redundancy power supply is necessary, can guarantee the continuity of key business.To avoid that battery system becomes black box, battery management system needs to ensure real-time reliable operation, battery management system needs reliable power supply.Single power supply, there is unstable power supply situation, for example, overvoltage, power failure and other abnormal power-off situation, therefore it is very necessary to design redundancy power supply.

[0004] At present, the conventional redundancy power supply mode of energy storage battery management system needs to be separately powered from external traction power line, and the power line arrangement is troublesome and additional system cost is increased. UTILITARY MODEL CONTENTS

[0005] To solve the problems in the prior art, the utility model provides a redundancy power supply system applied to energy storage battery management module, which can improve the power supply reliability of energy storage battery management system and simplify the complexity of redundancy power supply wiring.

[0006] The utility model adopts the following technical solutions.

[0007] The utility model provides a redundancy power supply system applied to energy storage battery management module, which comprises: a battery PACK and a battery management module, the battery PACK is connected with a power taking line and serves as a main power supply circuit;The redundancy power supply system further comprises a POE power supply system;The POE power supply system comprises at least one POE power supply link, when the number of POE power supply links is greater than 1, different POE power supply links are connected in sequence through a network cable and serve as a redundancy power supply circuit;The battery management module is connected with the battery PACK through the power taking line and is connected with the POE power supply system through a POE power supply bus, to realize the switching of the main power supply circuit and the redundancy power supply circuit.

[0008] Preferably, one side of the battery PACK is provided with a sampling line, which is connected with the power taking line PWR1+ and PWR1-;The board-level power supply module in the battery management module is connected with the battery PACK through the power taking line PWR1+ and PWR1-.

[0009] Preferably, the POE power supply link comprises: a forward communication interface, a reverse communication interface and a communication line; wherein the forward communication interface and the reverse communication interface are arranged in the battery management module; the communication line is provided with two, respectively denoted as: communication line one and communication line two; the forward communication interface and the reverse communication interface are connected with the communication line one and the communication line two respectively, and the forward communication interface and the reverse communication interface are connected through the first wire core and the second wire core in the communication line, and the first wire core and the second wire core are connected to form a POE power supply bus.

[0010] Preferably, the end of the communication line one is provided with a unidirectional diode, which is used to make the power supply direction flow from the forward communication interface to the reverse communication interface unidirectionally.

[0011] Preferably, when the number of POE power supply links is greater than 1, different POE power supply links are connected in turn in the form of daisy chain network.

[0012] Preferably, in the two POE power supply links connected, the communication line two of one POE power supply link is connected with the communication line one of another POE power supply link through a network cable, and the first wire core and the second wire core in the communication line two are connected with the first wire core and the second wire core in the communication line one respectively.

[0013] Preferably, the network cable comprises: a first network cable and a second network cable; the first network cable and the second network cable are used to connect to form a daisy chain network cable.

[0014] Preferably, the battery management module comprises: a board-level power supply module and a control module; the board-level power supply module is connected with the power taking line and the POE power supply bus, and is used to realize the switching of the main power supply loop and the redundant power supply loop; the control module is connected with the battery PACK, and is used to collect real-time characteristic parameters of the battery and monitor the real-time state of the battery.

[0015] Preferably, the voltage levels provided by the board-level power supply module include: 12V, 24V and 48V, and different voltage levels.

[0016] Preferably, the control module comprises: a battery voltage acquisition module, a temperature acquisition module and an equalization control module.

[0017] The utility model discloses beneficial effect lies in: the prior art is usually through a group of external power bus to give the battery management module power supply, and the power supply wire harness will be according to the battery management module configuration situation, designs the multi-branch power supply circuit, and the wire harness itself needs according to the battery arrangement situation customization design, when the power supply bus appears terminal contact, wire harness broken wire etc. Situation, part or all battery management module power supply is lost. In order to realize redundant power supply, usually will increase a independent power supply again, and wire harness traction and wire harness cost will increase obviously, and wire harness wiring will be more complex. In order to solve the wiring complexity and additional power bus cost of redundant power supply, the utility model designs the power supply system of battery direct power and external POE power supply dual -channel power supply, and the switching of main power supply circuit and redundant power supply circuit is realized in board -level power supply. The communication line is a group of wire harness that battery management system must, utilizes the thought of communication line harness circuit and power supply switching power supply, simplifies the wiring complexity of redundant power supply, reduces the comprehensive cost of wiring and implementation, and improves system power supply reliability. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the structure block diagram of the redundant power supply system for energy storage battery management module provided by the utility model embodiment;

[0019] Figure 2 It is the schematic diagram of POE redundant power supply circuit provided by the utility model embodiment;

[0020] Reference numerals in the drawing:

[0021] 1, battery PACK;

[0022] 2, battery management module;21, board -level power module;

[0023] 3, POE power supply system;301, POE power supply link one;302, POE power supply link two;30N, POE power supply link N;31, forward communication interface;311, first forward communication interface;312, second forward communication interface;31N, Nth forward communication interface;

[0024] 32, reverse communication interface;321, first reverse communication interface;322, second reverse communication interface;32N, Nth reverse communication interface;33, communication line;331, first communication line;332, second communication line;33N, Nth communication line;

[0025] 4, first wire core;5, second wire core;7, first network cable;8, second network cable. DETAILED DESCRIPTION

[0026] For the purpose, technical scheme and advantages of the utility model, the technical scheme of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. The embodiments described in the application are only a part of the embodiments of the utility model, not all the embodiments. Based on the spirit of the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0027] As shown in Figure 1 The utility model provides a kind of redundancy power supply system applied to energy storage battery management module, comprising: battery PACK1, battery management system 2 and POE (Power Over Ethernet) power supply system 3.

[0028] Wherein, the side of battery PACK1 leads out sampling line, is directly connected by the sampling line of leading out and takes electricity line PWR1+ and PWR1-, then PWR1+ and PWR1- are connected to board-level power module 21 in battery management module 2, as main power supply circuit.

[0029] Power management module 2 includes: board-level power module 21 and control module. Wherein, board-level power module 21 is connected with electricity line PWR1+ and PWR1- and POE power supply bus, for controlling switching electricity line and POE power supply bus, to realize the switching of main power supply circuit and redundancy power supply circuit.Control module includes: battery voltage acquisition module, temperature acquisition module, equalization control module, directly collects battery real-time characteristic parameter by above control module, monitors battery real-time state.

[0030] In the preferred but non-limiting embodiment of the utility model, the voltage level provided by board-level power module includes: 12V, 24V and 48V, different voltage levels.

[0031] The POE power supply system 3 comprises a plurality of POE power supply links. Each POE power supply link comprises a forward communication interface 31, a reverse communication interface 32 and two communication lines 33, which are referred to as communication line one and communication line two respectively. The forward communication interface 31 and the reverse communication interface 32 are arranged on the battery management module 2. Each communication line 33 supports the POE power supply current carrying capacity. The forward communication interface 31 and the reverse communication interface 32 are connected with the communication line one and the communication line two respectively, and meanwhile, the forward communication interface 31 and the reverse communication interface 32 are connected with each other through the idle wire core in the communication line 33, the first wire core 4 and the second wire core 5. The end of the communication line one is an input end, and the end of the communication line two is an output end. A unidirectional diode is arranged at the input end, so that the power supply direction is from the forward communication interface 31 to the reverse communication interface 32, forming unidirectional flow. The POE power supply system 3 is used as a redundant power supply loop and is connected with the board-level power supply through a POE power supply bus. In the preferred but non-limiting embodiment of the present application, the forward communication interface 31 and the reverse communication interface 32 are RJ45 interfaces.

[0032] The plurality of POE power supply links are connected in sequence, and the communication line two of the first POE power supply link is connected with the communication line one of the second POE power supply link through the first wire core 4 and the second wire core 5, forming a “hand-in-hand” connection mode. In addition, the communication line two of the first POE power supply link and the communication line one of the second POE power supply link are also connected through the first network cable 7 and the second network cable 8, forming a redundant power supply loop based on a daisy chain ring network.

[0033] When the plurality of POE power supply links are connected, the first wire core 4 and the second wire core 5 between the communication lines 33 are connected with each other, and the POE bus is formed.

[0034] As shown in the figure, Figure 2 In the preferred but non-limiting embodiment of the present application, the plurality of battery management modules 2 are sequentially referred to as POE power supply link one 301, POE power supply link two 302, …, POE power supply link 30N, N is a positive integer, and the number of N can be selected according to the actual configuration of the system.

[0035] Specifically, the POE power supply link one 301 comprises a first forward communication interface 311, a first reverse communication interface 321 and two first communication lines 331; the POE power supply link two 302 comprises a second forward communication interface 312, a second reverse communication interface 322 and two second communication lines 332; and the POE power supply link 30N comprises an Nth forward communication interface 31N, an Nth reverse communication interface 32N and two Nth communication lines 33N.

[0036] In the preferred but non-limiting embodiments of the utility model, POE power supply link one 301, POE power supply link two 302 and POE power supply link 30N are sequentially connected in series with Ethernet cable as the medium to form a daisy chain ring network, so that the POE power supply system 3 is a redundant power supply circuit independent of the battery PACK power supply, and forms a redundant power supply system with the PACK power supply, ensuring that the battery management module will not lose power.

[0037] The POE power supply level can be adjusted according to the application scenario. When the power supply voltage is high, the current passing through the network cable will be reduced.

[0038] In the preferred but non-limiting embodiments of the utility model, 24V is taken as an example, and 24V level is transmitted through a non-communication chip. In the embodiments, the daisy chain network cable first network cable 7 and second network cable 8 are used for communication networking, and the first wire core 4 and second wire core 5 are used to form a POE redundant power supply network.

[0039] According to some embodiments, the battery PACK directly takes power and the POE power supply realizes a redundant power supply system without increasing the cost of additional wire harness.

[0040] Compared with the prior art, the utility model has the beneficial effects that: the utility model designs a power taking system of battery direct power taking and external POE power supply dual power supply, and the switching of the main power supply circuit and the redundant power supply circuit is realized in the board-level power supply. The communication line is a set of wire harness that the battery management system must have. The idea of using the communication line harness circuit to combine the power supply switching power supply simplifies the complexity of the redundant power supply wiring, reduces the comprehensive cost of wiring and implementation, and improves the reliability of the system power supply.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model and not to limit them. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that the specific embodiments of the utility model can still be modified or replaced, without departing from the spirit and scope of the utility model. Any modification or equivalent replacement that does not deviate from the spirit and scope of the utility model should be covered within the protection scope of the claims of the utility model.

Claims

1. A redundant power supply system for use in an energy storage battery management module, comprising: The battery PACK (1) and the battery management module (2) are characterized in that: The battery PACK (1) is connected to the power line as the main power supply circuit; The redundant power supply system further comprises a POE power supply system (3); The POE power supply system (3) comprises at least one POE power supply link, and when the number of POE power supply links is greater than 1, different POE power supply links are connected in turn through network cables as redundant power supply circuits; The battery management module (2) is connected to the battery PACK (1) through the power line and is connected to the POE power supply system (3) through the POE power supply bus, for realizing switching of the main power supply circuit and the redundant power supply circuit.

2. The redundant power supply system for energy storage battery management module according to claim 1, characterized in that: One side of the battery PACK (1) is provided with a sampling line connected to the power line PWR1+ and PWR1-; The board-level power supply module (21) in the battery management module (2) is connected to the battery PACK (1) through the power line PWR1+ and PWR1-.

3. The redundant power supply system for energy storage battery management module according to claim 1, characterized in that: The POE power supply link comprises a forward communication interface (31), a reverse communication interface (32) and a communication line (33); wherein the forward communication interface (31) and the reverse communication interface (32) are both arranged in the battery management module (2); the communication line (33) is provided with two, respectively denoted as communication line one and communication line two; The forward communication interface (31) and the reverse communication interface (32) are connected to the communication line one and the communication line two respectively, and the forward communication interface (31) and the reverse communication interface (32) are connected through the first wire core (4) and the second wire core (5) in the communication line (33), and the first wire core (4) and the second wire core (5) are connected in communication to form a POE power supply bus.

4. The redundant power supply system for energy storage battery management module according to claim 3, characterized in that: The end of the communication line one is provided with a unidirectional diode for making the power supply direction flow from the forward communication interface (31) to the reverse communication interface (32) in one direction.

5. The redundant power supply system for energy storage battery management module according to claim 2, characterized in that: When the number of POE power supply links is greater than 1, different POE power supply links are connected in turn in the form of daisy chain network.

6. The redundant power supply system for energy storage battery management module according to claim 5, characterized in that: In the two connected POE power supply links, the communication line two of one POE power supply link is connected to the communication line one of the other POE power supply link through a network cable, and the first wire core (4) and the second wire core (5) in the communication line two are connected in communication with the first wire core (4) and the second wire core (5) in the communication line one respectively.

7. The redundant power supply system for energy storage battery management module according to claim 6, characterized in that: The network cable comprises a first network cable (7) and a second network cable (8). The first net line (7) and the second net line (8) are used for connection to form a daisy chain net line. 8.The redundant power supply system applied to the energy storage battery management module according to claim 1, characterized in that: The battery management module (2) comprises a board-level power module (21) and a control module. The board-level power module (21) is connected with the power taking line and the POE power supply bus, and is used for switching the main power supply loop and the redundant power supply loop. The control module is connected with the battery PACK (1), and is used for collecting real-time characteristic parameters of the battery and monitoring real-time states of the battery. 9.The redundant power supply system applied to the energy storage battery management module according to claim 8, characterized in that: The voltage levels provided by the board-level power module (21) include 12V, 24V and 48V, and different voltage levels. 10.The redundant power supply system applied to the energy storage battery management module according to claim 8, characterized in that: The control module comprises a battery voltage collection module, a temperature collection module and an equalization control module.

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