Battery equalization circuit based on high-capacity marine battery and marine battery module

Abstract

The utility model provides a battery equalization circuit based on a high-capacity marine battery and a marine battery module. The circuit comprises a battery equalization protector and a plurality of equalization heating multiplexing modules, each equalization heating multiplexing module comprises a heating film resistor and an equalization heating control circuit, the positive electrode equalization monitoring end of the battery equalization protector is used for being connected with the positive electrode of a marine battery monomer, and the second end of the heating film resistor is connected with the negative electrode equalization monitoring end of the battery equalization protector; the negative electrode equalization monitoring end of the battery equalization protector is used for being connected with the negative electrodes of the marine battery monomers, and the heating film resistor is arranged in a battery pack formed by the marine battery monomers, so that heat generated by the heating film resistor is used for drying and reducing the internal humidity of the battery pack. The heat generated by the heating film resistor in the balancing process can be used for reducing the humidity in the battery pack and reducing the risk that the battery is affected with damp and corroded, and at the moment, the heat on the heating film resistor dehumidifies the interior of the battery pack.

Description

Technical Field

[0001] This disclosure relates to the field of marine battery power balancing technology, and in particular to a battery balancing circuit based on a high-capacity marine battery and a marine battery module. Background Technology

[0002] Existing marine batteries are battery packs designed for high humidity and strong vibration environments. There are two main methods for balancing marine batteries: active balancing and passive balancing. While active balancing improves balancing efficiency, it is costly and has complex circuitry. Traditional passive balancing methods use parallel-connected energy-dissipating resistors to the cells to dissipate excess charge when the cells are at high charge levels. However, this method has the following problems: 1. Although the balancing current can be increased by adding an external balancing circuit, the balancing current is limited by the resistor's power, resulting in unsatisfactory performance, typically less than 100mA, and low balancing efficiency; 2. High balancing current causes significant resistor heating, requiring additional heat dissipation devices, increasing system complexity. Furthermore, the heat generated during balancing is not utilized effectively, being directly dissipated into the air, resulting in energy waste. Utility Model Content

[0003] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a battery balancing circuit based on a large-capacity marine battery and a marine battery module that effectively improves the heat utilization rate during the power balancing process.

[0004] The purpose of this disclosure is achieved through the following technical solution:

[0005] A battery balancing circuit based on a high-capacity marine battery includes: a battery balancing protector and multiple balancing heating multiplexing modules; each of the balancing heating multiplexing modules includes a heating film resistor and a balancing heating control circuit. The first terminal and control terminal of the balancing heating control circuit are both connected to the positive balancing monitoring terminal of the battery balancing protector. The positive balancing monitoring terminal of the battery balancing protector is used to connect to the positive terminal of a single marine battery cell. The second terminal of the balancing heating control circuit is connected to the first terminal of the heating film resistor, and the second terminal of the heating film resistor is connected to the negative balancing monitoring terminal of the battery balancing protector. The negative balancing monitoring terminal of the battery balancing protector is used to connect to the negative terminal of a single marine battery cell. The heating film resistor is disposed within a battery pack formed by multiple marine battery cells so that the heat it generates is used to reduce the internal humidity of the battery pack.

[0006] In one embodiment, the equalization heating control circuit includes an equalization heating electronic switch and a first resistor. The first end of the first resistor is connected to the positive equalization monitoring terminal of the battery equalization protector. The second end of the first resistor is connected to the first end of the equalization heating electronic switch. The second end of the equalization heating electronic switch is connected to the first end of the heating film resistor. The control terminal of the equalization heating electronic switch is connected to the positive equalization monitoring terminal of the battery equalization protector.

[0007] In one embodiment, the equalization heating control circuit further includes a second resistor, the first end of which is connected to the first end of the first resistor, and the second end of which is connected to the control terminal of the equalization heating electronic switch.

[0008] In one embodiment, the equalization heating control circuit further includes an equalization Zener diode, the negative terminal of which is connected to the second terminal of the first resistor, and the negative terminal of which is connected to the second terminal of the second resistor.

[0009] In one embodiment, the equalization heating electronic switch is a PMOS transistor.

[0010] In one embodiment, the equalization heating control circuit further includes a filter capacitor, the first end of which is connected to the positive equalization monitoring terminal of the battery equalization protector, and the second end of which is connected to the negative equalization monitoring terminal of the battery equalization protector.

[0011] In one embodiment, the heating film resistor is a graphene electrothermal film resistor.

[0012] In one embodiment, the heating film resistor is a metal film resistor.

[0013] In one embodiment, multiple equal heating reuse modules are connected in parallel sequentially.

[0014] A marine battery module includes the battery balancing circuit based on a high-capacity marine battery as described in any of the above embodiments.

[0015] Compared with the prior art, this disclosure has at least the following advantages:

[0016] When the battery equalization protector detects that the voltage difference of a single marine battery cell exceeds the threshold, the single marine battery cell activates the equalization protection, turns on the internal equalization switch, and changes the equalization heating control circuit from the off state to the on state, thereby achieving a large equalization current. However, the heating film resistor will not exceed its own power limit and will not cause serious heat generation requiring heat dissipation. In addition, the heat generated by the heating film resistor during the equalization process can be used to reduce the humidity inside the battery pack and reduce the risk of battery moisture corrosion. At this time, the heat on the heating film resistor dehumidifies the inside of the battery pack. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a topology diagram of a battery balancing circuit based on a high-capacity marine battery in one embodiment. Detailed Implementation

[0019] To facilitate understanding of this disclosure, a more complete description will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the present disclosure. However, this disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure.

[0020] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] This disclosure relates to a battery balancing circuit based on a high-capacity marine battery. In one embodiment, the battery balancing circuit includes a battery balancing protector and multiple balancing heating multiplexing modules. Each balancing heating multiplexing module includes a heating film resistor and a balancing heating control circuit. The first terminal and control terminal of the balancing heating control circuit are both connected to the positive balancing monitoring terminal of the battery balancing protector. The positive balancing monitoring terminal of the battery balancing protector is used to connect to the positive terminal of a single marine battery cell. The second terminal of the balancing heating control circuit is connected to the first terminal of the heating film resistor. The second terminal of the heating film resistor is connected to the negative balancing monitoring terminal of the battery balancing protector. The negative balancing monitoring terminal of the battery balancing protector is used to connect to the negative terminal of a single marine battery cell. The heating film resistor is disposed within a battery pack formed by multiple marine battery cells so that the heat it generates is used to reduce the internal humidity of the battery pack. When the battery equalization protector detects that the voltage difference of a single marine battery cell exceeds the threshold, the single marine battery cell activates the equalization protection, turns on the internal equalization switch, and changes the equalization heating control circuit from the off state to the on state, thereby achieving a large equalization current. However, the heating film resistor will not exceed its own power limit and will not cause serious heat generation requiring heat dissipation. In addition, the heat generated during the equalization process can be used to reduce the humidity inside the battery pack and reduce the risk of battery corrosion due to moisture. At this time, the heat on the heating film resistor dehumidifies the inside of the battery pack.

[0023] Please see Figure 1 This is a topology circuit diagram of a battery balancing circuit based on a high-capacity marine battery according to an embodiment of the present disclosure.

[0024] An embodiment of a battery balancing circuit 10 based on a high-capacity marine battery includes a battery balancing protector U1 and multiple balancing heating multiplexing modules. Each of the balancing heating multiplexing modules includes a heating film resistor RBn and a balancing heating control circuit 100. The first terminal and the control terminal of the balancing heating control circuit 100 are both connected to the positive balancing monitoring terminal of the battery balancing protector U1, which is used to connect to the positive terminal of a single marine battery cell. The second terminal of the balancing heating control circuit 100 is connected to the first terminal of the heating film resistor RBn, and the second terminal of the heating film resistor RBn is connected to the negative balancing monitoring terminal of the battery balancing protector U1, which is used to connect to the negative terminal of a single marine battery cell. The heating film resistor RBn is disposed within a battery pack formed by multiple marine battery cells so that the heat it generates is used to reduce the humidity inside the battery pack.

[0025] In this embodiment, when the battery equalization protector detects that the voltage difference of a single marine battery cell exceeds the threshold, the single marine battery cell activates the equalization protection and turns on the internal equalization switch, causing the equalization heating control circuit to change from the off state to the on state, thereby achieving a large equalization current. However, the heating film resistor will not exceed its own limited power and will not cause serious heat generation requiring heat dissipation. Furthermore, the heat generated during the equalization process can be used to reduce the humidity inside the battery pack, reducing the risk of battery corrosion due to moisture. At this time, the heat on the heating film resistor dehumidifies the inside of the battery pack.

[0026] In another embodiment, the heating film resistor is connected to the BMS board of the battery pack, and can be disposed either on top of the BMS board or below the BMS board.

[0027] In one embodiment, please refer to Figure 1 The equalization heating control circuit 100 includes an equalization heating electronic switch tube MBn and a first resistor RAn. The first end of the first resistor RAn is connected to the positive equalization monitoring terminal of the battery equalization protector U1. The second end of the first resistor RAn is connected to the first end of the equalization heating electronic switch tube MBn. The second end of the equalization heating electronic switch tube MBn is connected to the first end of the heating film resistor RBn. The control terminal of the equalization heating electronic switch tube MBn is connected to the positive equalization monitoring terminal of the battery equalization protector U1. In this embodiment, the equalization heating electronic switch MBn acts as the on / off switch for the heating film resistor RBn. When the battery equalization protector U1 detects that the voltage difference between the individual marine battery cells exceeds a threshold, the battery equalization protector U1 activates its internal equalization switch. The positive electrode equalization monitoring terminal controls the voltage at the control terminal of the equalization heating electronic switch MBn, causing MBn to switch from off to on. This allows the equalization current to release heat through the heating film resistor RBn. Furthermore, the heat generated on the heating film resistor RBn reduces humidity within the battery pack, lowering the risk of battery corrosion due to moisture and improving heat utilization during the equalization process. The first resistor RAn rapidly connects the first terminal and the control terminal of the equalization heating electronic switch MBn to improve its switching efficiency.

[0028] In another embodiment, during the balancing process, the balancing current includes an external balancing current flowing through the heating film resistor RBn and an internal balancing current flowing through the battery balancing protector U1.

[0029] In another embodiment, the heating film resistor RBn is a graphene electrothermal film resistor, that is, the heating film resistor RBn is an electrothermal film made of graphene material to replace the traditional equalization resistor. By utilizing the high thermal conductivity and large area of ​​graphene, the heat during equalization is quickly transferred to the low-temperature marine battery.

[0030] In another embodiment, the heating film resistor RBn is a metal film resistor, that is, the heating film resistor RBn is an electrothermal film made of metal material, which utilizes the high heat capacity of metal to avoid local high temperature, and at the same time can also use the heat to assist in heating the low-temperature marine battery.

[0031] Furthermore, the equalization heating control circuit 100 also includes a second resistor RMn. The first end of the second resistor RMn is connected to the first end of the first resistor RAn, and the second end of the second resistor RMn is connected to the control terminal of the equalization heating electronic switch MBn. In this embodiment, the second resistor RMn is connected in series with the control terminal of the equalization heating electronic switch MBn. Specifically, the two ends of the second resistor RMn are respectively connected to the control terminal of the equalization heating electronic switch MBn and the positive equalization monitoring terminal of the battery equalization protector U1, so that the second resistor RMn ensures the normal switching on and off of the equalization heating electronic switch MBn.

[0032] Furthermore, the equalization heating control circuit 100 also includes an equalization Zener diode DBn. ​​The negative terminal of the equalization Zener diode DBn is connected to the second terminal of the first resistor RAn, and the negative terminal of the equalization Zener diode DBn is connected to the second terminal of the second resistor RMn. In this embodiment, the equalization Zener diode DBn is located between the first resistor RAn and the second resistor RMn. Specifically, the equalization Zener diode DBn is connected in parallel between the first terminal and the control terminal of the equalization heating electronic switch MBn. The equalization Zener diode DBn is used to protect the gate of the equalization heating electronic switch MBn from the transient effects of the battery pack.

[0033] In another embodiment, the equalization heating electronic switch MBn is a PMOS transistor, the first terminal of the equalization heating electronic switch MBn is the drain of the PMOS transistor, the second terminal of the equalization heating electronic switch MBn is the source of the PMOS transistor, and the control terminal of the equalization heating electronic switch MBn is the gate of the PMOS transistor.

[0034] In one embodiment, the equalization heating control circuit 100 further includes a filter capacitor CAn. The first terminal of the filter capacitor CAn is connected to the positive equalization monitoring terminal of the battery equalization protector U1, and the second terminal of the filter capacitor CAn is connected to the negative equalization monitoring terminal of the battery equalization protector U1. In this embodiment, the filter capacitor CAn is connected in parallel to the two monitoring terminals of the battery equalization protector U1. The filter capacitor CAn filters the voltage of the marine battery cells collected by the battery equalization protector U1, facilitating timely detection of voltage differences between the marine battery cells and thereby improving the accuracy of equalization control.

[0035] In another embodiment, multiple equal heating multiplexing modules are connected in series, and multiple marine battery cells are also connected in series simultaneously.

[0036] In one embodiment, this disclosure also relates to a marine battery module, including the battery balancing circuit based on a high-capacity marine battery as described in any of the above embodiments. In this embodiment, the battery balancing circuit based on a high-capacity marine battery includes a battery balancing protector and multiple balancing heating multiplexing modules; each of the balancing heating multiplexing modules includes a heating film resistor and a balancing heating control circuit. The first terminal and the control terminal of the balancing heating control circuit are both connected to the positive balancing monitoring terminal of the battery balancing protector. The positive balancing monitoring terminal of the battery balancing protector is used to connect to the positive terminal of a single marine battery cell. The second terminal of the balancing heating control circuit is connected to the first terminal of the heating film resistor. The second terminal of the heating film resistor is connected to the negative balancing monitoring terminal of the battery balancing protector. The negative balancing monitoring terminal of the battery balancing protector is used to connect to the negative terminal of a single marine battery cell. The heating film resistor is disposed within a battery pack formed by multiple single marine battery cells so that the heat it generates is used to reduce the humidity inside the battery pack. When the battery equalization protector detects that the voltage difference of a single marine battery cell exceeds the threshold, the single marine battery cell activates the equalization protection, turns on the internal equalization switch, and changes the equalization heating control circuit from the off state to the on state, thereby achieving a large equalization current. However, the heating film resistor will not exceed its own power limit and will not cause serious heat generation requiring heat dissipation. In addition, the heat generated during the equalization process can be used to reduce the humidity inside the battery pack and reduce the risk of battery corrosion due to moisture. At this time, the heat on the heating film resistor dehumidifies the inside of the battery pack.

[0037] The embodiments described above are merely illustrative of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent disclosure. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these all fall within the protection scope of this disclosure. Therefore, the protection scope of this patent disclosure should be determined by the appended claims.

Claims

1. A battery balancing circuit based on a high-capacity marine battery, characterized in that, include: Battery equalization protector, Multiple equalization heating multiplexing modules are provided. Each equalization heating multiplexing module includes a heating film resistor and an equalization heating control circuit. The first terminal and the control terminal of the equalization heating control circuit are both connected to the positive equalization monitoring terminal of the battery equalization protector. The positive equalization monitoring terminal of the battery equalization protector is used to connect to the positive terminal of the marine battery cell. The second terminal of the equalization heating control circuit is connected to the first terminal of the heating film resistor. The second terminal of the heating film resistor is connected to the negative equalization monitoring terminal of the battery equalization protector. The negative equalization monitoring terminal of the battery equalization protector is used to connect to the negative terminal of the marine battery cell. The heating film resistor is disposed within the battery pack formed by the multiple marine battery cells so that the heat generated by it is used to reduce the humidity inside the battery pack.

2. The battery balancing circuit based on a high-capacity marine battery according to claim 1, characterized in that, The equalization heating control circuit includes an equalization heating electronic switch and a first resistor. The first end of the first resistor is connected to the positive equalization monitoring terminal of the battery equalization protector. The second end of the first resistor is connected to the first end of the equalization heating electronic switch. The second end of the equalization heating electronic switch is connected to the first end of the heating film resistor. The control terminal of the equalization heating electronic switch is connected to the positive equalization monitoring terminal of the battery equalization protector.

3. The battery balancing circuit based on a high-capacity marine battery according to claim 2, characterized in that, The equal heating control circuit further includes a second resistor, the first end of which is connected to the first end of the first resistor, and the second end of which is connected to the control terminal of the equal heating electronic switch tube.

4. The battery balancing circuit based on a high-capacity marine battery according to claim 3, characterized in that, The equalization heating control circuit also includes an equalization Zener diode, the negative terminal of which is connected to the second end of the first resistor, and the negative terminal of which is connected to the second end of the second resistor.

5. The battery balancing circuit based on a high-capacity marine battery according to claim 2, characterized in that, The equalization heating electronic switch is a PMOS transistor.

6. The battery balancing circuit based on a high-capacity marine battery according to claim 2, characterized in that, The equalization heating control circuit also includes a filter capacitor. The first end of the filter capacitor is connected to the positive equalization monitoring terminal of the battery equalization protector, and the second end of the filter capacitor is connected to the negative equalization monitoring terminal of the battery equalization protector.

7. The battery balancing circuit based on a high-capacity marine battery according to claim 1, characterized in that, The heating film resistor is a graphene electrothermal film resistor.

8. The battery balancing circuit based on a high-capacity marine battery according to claim 1, characterized in that, The heating film resistor is a metal film resistor.

9. The battery balancing circuit based on a high-capacity marine battery according to claim 1, characterized in that, Multiple equal heating multiplexing modules are connected in parallel sequentially.

10. A marine battery module, characterized in that, Includes a battery balancing circuit based on a high-capacity marine battery as described in any one of claims 1 to 9.

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