Battery management assembly and device

Abstract

The invention discloses a battery management assembly and device. The battery management assembly comprises a PCB and a BMS control board. A BMS control panel, a positive electrode connection module, a negative electrode connection module, a sampling module, a current control module and a current limiting module are arranged on one side of the PCB at intervals. One end of the cathode connection module is connected with the cathode of the battery, the other end is connected with one end of the sampling module, the other end of the sampling module is connected with one end of the current control module, and the other end of the current control module is connected with the first end of the BMS control panel; one end of the anode connecting module is connected with the anode of the battery, the other end of the anode connecting module is connected with one end of the current limiting module, and the other end of the current limiting module is connected with the second end of the BMS control panel. According to the technical scheme provided by the embodiment of the invention, the BMS control panel and the sampling module as well as the current control module and the current limiting module are respectively arranged at different positions of the PCB, so that the heat dissipation influence among the modules is reduced, and the overall heat dissipation effect of the battery management assembly is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of battery management, and in particular to a battery management component and device. Background Art

[0002] With the continuous development of battery technology, the discharge current of the single cell in the battery is getting larger and larger, and the internal resistance of the single cell is getting lower and lower. The discharge current requirement for the BMS (BATTERY MANAGEMENT SYSTEM) is also getting larger and larger, resulting in more and more serious heating of other electrical components connected to the BMS. It is necessary to set up an additional heat dissipation structure for the BMS, and it is necessary to consider avoiding high temperature areas when designing the circuit. The circuit design is relatively cumbersome, the processing technology is relatively complex, and the heat dissipation of various components concentrated together affects each other, resulting in unsatisfactory heat dissipation effect. Summary of the invention

[0003] The present invention provides a battery management component and a device to improve the heat dissipation effect of a BMS control board and simplify circuit design.

[0004] According to one aspect of the present invention, there is provided a battery management assembly, comprising: a PCB board and a BMS control board;

[0005] The BMS control board, the positive electrode connection module, the negative electrode connection module, the sampling module, the current control module and the current limiting module are arranged on one side of the PCB board; the BMS control board, the positive electrode connection module, the negative electrode connection module, the sampling module, the current control module and the current limiting module are arranged at intervals;

[0006] One end of the negative electrode connection module is connected to the negative electrode of the battery, the other end of the negative electrode connection module is connected to one end of the sampling module through the PCB board, the other end of the sampling module is connected to one end of the current control module through the PCB board, and the other end of the current control module is connected to the first end of the BMS control board through the PCB board;

[0007] One end of the positive electrode connection module is connected to the positive electrode of the battery, the other end of the positive electrode connection module is connected to one end of the current limiting module through the PCB board, and the other end of the current limiting module is connected to the second end of the BMS control board.

[0008] Optionally, at least one heat dissipation module is further included, one end of the heat dissipation module is connected to the battery, the other end of the heat dissipation module is connected to the third end of the BMS control board through the PCB board, and the third end of the BMS control board collects battery information of the battery.

[0009] Optionally, the positive electrode connection module includes a positive electrode connection patch, the top surface of the positive electrode connection patch is connected to the positive electrode of the battery, and the bottom surface of the positive electrode connection patch is connected to the PCB board;

[0010] The negative electrode connection module comprises a negative electrode connection patch, the top surface of the negative electrode connection patch is connected to the negative electrode of the battery, and the bottom surface of the negative electrode connection patch is connected to the PCB board;

[0011] The heat dissipation module comprises a heat dissipation connection patch, the top surface of the heat dissipation connection patch is connected to the positive / negative pole of the battery, and the bottom surface of the heat dissipation connection patch is connected to the PCB board.

[0012] Optionally, the BMS control board includes a first connection portion, a second connection portion and at least one third connection portion, wherein the first connection portion, the second connection portion and the third connection portion include a plurality of connection grooves; and the connection grooves are arranged at the edge of the BMS control board;

[0013] The first end of the BMS control board is connected to the current control module through the connecting groove of the first connecting part, the second end of the BMS control board is connected to the current limiting module through the connecting groove of the second connecting part, and the third end of the BMS control board is connected to the heat dissipation module through the connecting groove of the third connecting part.

[0014] Optionally, the connecting groove is also used to connect the BMS control board to the PCB board.

[0015] Optionally, the sampling module includes a sampling resistor, the current control module includes a MOS tube, and the current limiting module includes a fuse.

[0016] Optionally, the PCB board includes an aluminum substrate, and the aluminum substrate includes:

[0017] Circuit layer,

[0018] An insulating layer, disposed on a side of the circuit layer away from the BMS control board;

[0019] The metal layer is arranged on a side of the insulating layer away from the BMS control board.

[0020] Optionally, the positive electrode connection patch, the negative electrode connection patch and the heat sink patch comprise copper.

[0021] According to another aspect of the present invention, a battery management device is provided, comprising the battery management component described in any one of the first aspects.

[0022] Optionally, the battery management device further includes a battery holder, in which a plurality of battery cells are arranged, the positive electrodes of the plurality of battery cells are connected to the positive electrode connection patch through the battery holder, and the negative electrodes of the plurality of battery cells are connected to the negative electrode connection patch through the battery holder.

[0023] The technical solution provided by the embodiment of the present invention separately arranges the BMS control board with smaller heat generation and the sampling module, current control module and current limiting module with larger heat generation on the PCB board, and arranges the sampling module, current control module and current limiting module at different positions on the PCB board at intervals, thereby reducing the heat dissipation influence between the modules and improving the overall heat dissipation effect. There is no need to set up a separate heat dissipation structure for the BMS control board, reducing the overall circuit design difficulty and simplifying the processing technology.

[0024] 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 invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. 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.

[0026] Figure 1 A schematic diagram of the structure of a battery management component provided according to an embodiment of the present invention;

[0027] Figure 2 A schematic diagram of the structure of another battery management component provided according to an embodiment of the present invention;

[0028] Figure 3 A schematic diagram of the structure of another battery management component provided according to an embodiment of the present invention;

[0029] Figure 4 A schematic diagram of the structure of a PCB board of a battery management component provided according to an embodiment of the present invention;

[0030] Figure 5 The figure is a schematic diagram of the structure of a battery management device provided according to an embodiment of the present invention. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0032] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention 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 present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof 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 that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0033] Figure 1 FIG. 1 is a schematic diagram of the structure of a battery management component provided according to an embodiment of the present invention. Figure 1 The battery management component includes a PCB board 100 and a BMS control board 200; a BMS control board 200, a positive electrode connection module 110, a negative electrode connection module 120, a sampling module 130, a current control module 140 and a current limiting module 150 are arranged on one side of the PCB board 100; the BMS control board 200, the positive electrode connection module 110, the negative electrode connection module 120, the sampling module 130, the current control module 140 and the current limiting module 150 are arranged at intervals; one end of the negative electrode connection module 120 is connected to the negative electrode of the battery, and the negative electrode connection module 120 The other end of the positive connection module 110 is connected to one end of the sampling module 130 through the PCB board 100, the other end of the sampling module 130 is connected to one end of the current control module 140 through the PCB board 100, and the other end of the current control module 140 is connected to a first end of the BMS control board 200 through the PCB board 100; one end of the positive connection module 110 is connected to the positive electrode of the battery, the other end of the positive connection module 110 is connected to one end of the current limiting module 150 through the PCB board 100, and the other end of the current limiting module 150 is connected to a second end of the BMS control board 200.

[0034] Specifically, one side of the PCB (Printed Circuit Board) is provided with wiring to realize the electrical connection between the BMS control board and the positive connection module 110, the negative connection module 120, the sampling module 130, the current control module 140 and the current limiting module 150. The BMS control board 200 is the core part of the battery management component. The BMS control board 200 can monitor the voltage, current and temperature of the battery through the sampling module 130, the current control module 140 and the current limiting module 150 connected thereto. The current flowing through the sampling module 130, the current control module 140 and the current limiting module 150 directly connected to the positive or negative electrode of the battery is large, and the temperature and the heat generated are high, while the current flowing through the BMS control board 200 body is small, which will not cause very high temperature and heat. The BMS control board 200 is separated from other components with high heat generation, thereby reducing the temperature rise performance of the PCB board 100 to improve the overall heat dissipation effect of the battery management component. The positive connection module 110, the negative connection module 120, the sampling module 130, the current control module 140 and the current limiting module 150 can be arranged at intervals in different areas of the PCB board 100, so as to ensure that the heat dissipation effects of the modules do not affect each other, thereby further improving the heat dissipation effect.

[0035] It should be noted that, in this embodiment, the positions of the positive electrode connection module 110, the negative electrode connection module 120, the sampling module 130, the current control module 140 and the current limiting module 150 on the PCB board 100 are not specifically limited. Figure 1As shown, the BMS control board 200 can be arranged in the central part of the PCB board 100, leaving space for other components to be arranged around the BMS control board 200. The positive connection module 110 and the negative connection module 120 can be respectively arranged at the corners of the PCB board 100 to shorten the connection paths between the positive and negative electrodes of the battery and the positive connection module 110 and the negative connection module 120. One end of the sampling module 130 is connected to the negative connection module 120 through the wiring on the PCB board 100, and the other end is connected to one end of the current control module 140 through the wiring, and the other end of the current control module 140 is connected to the first end of the BMS control board 200. The sampling module 130 can be a sampling resistor, and the BMS control board 200 can obtain battery information according to the current or voltage flowing through the sampling resistor. The current control module 140 can be a discharge MOS tube (Metal-Oxide-Semiconductor Field-Effect Transistor). The current control module 140 can perform a switch operation through a control signal of the BMS control board 200 to adjust the battery discharge state and prevent the battery from over-discharging. The sampling module 130 can be set on the edge of the PCB board 100 close to the negative electrode connection module 120, and the current control module 140 can be set on the PCB board 100 close to the BMS control board 200, so that the sampling module 130 and the current control module 140 maintain a certain distance on the PCB board 100, reducing the influence between the heat dissipation of the sampling module 130 and the heat dissipation of the current control module 140. One end of the current limiting module 150 is connected to the positive electrode connection module 110 through the wiring on the PCB board 100, and the other end is connected to the second end of the BMS control board 200 through the wiring. The current limiting module 150 can be a fuse. When the current in the battery abnormally rises to a certain height and temperature, the current limiting module 150 can cut off the current to protect the devices on the PCB board 100 from being burned. The current limiting module 150 may be disposed on the PCB board 100 at a portion close to the BMS control board 200 to reduce the heat dissipation effect between the positive electrode connection module 110 and the current limiting module 150 .

[0036] The battery management component provided in the embodiment of the present invention separately arranges the BMS control board with lower heat generation and the sampling module, current control module and current limiting module with higher heat generation on the PCB board, and arranges the sampling module, current control module and current limiting module at different positions on the PCB board at intervals, thereby reducing the heat dissipation influence between the modules and improving the overall heat dissipation effect. There is no need to set up a separate heat dissipation structure for the BMS control board, reducing the overall circuit design difficulty and simplifying the processing technology.

[0037] Optionally, based on the above embodiment, Figure 1The battery management component further includes at least one heat dissipation module 160, one end of the heat dissipation module 160 is connected to the battery, and the other end of the heat dissipation module 160 is connected to the third end of the BMS control board 200 through the PCB board 100, and the third end of the BMS control board 200 collects battery information of the battery.

[0038] Specifically, a plurality of cells may be provided in the battery, and a single cell is connected to the third end of the BMS control board 200 through the heat dissipation module 160 and the wiring on the PCB board 100, so that the BMS control board 200 can monitor the battery information of a single cell in the battery. The present embodiment does not specifically limit the position and number of the heat dissipation module 160 on the PCB board 100. For example, Figure 1 As shown, four heat dissipation modules 160 are arranged on the PCB board 100 and are respectively connected to each battery cell. The heat dissipation module 160 can be arranged at the edge portion of the PCB board 100 to shorten the connection path between a single battery cell and the BMS control board 200 while further improving the heat dissipation effect of the PCB board 100.

[0039] Optionally, Figure 2 FIG. 1 is a schematic diagram of the structure of another battery management component provided according to an embodiment of the present invention. Figure 2 The positive electrode connection module 110 includes a positive electrode connection patch 111, the top surface of the positive electrode connection patch 111 is connected to the positive electrode of the battery, and the bottom surface of the positive electrode connection patch 111 is connected to the PCB board 100; the negative electrode connection module 120 includes a negative electrode connection patch 121, the top surface of the negative electrode connection patch 121 is connected to the negative electrode of the battery, and the bottom surface of the negative electrode connection patch 121 is connected to the PCB board 100; the heat dissipation module 160 includes a heat dissipation connection patch 161, the top surface of the heat dissipation connection patch 161 is connected to the positive / negative electrode of the battery, and the bottom surface of the heat dissipation connection patch 161 is connected to the PCB board 100.

[0040] Specifically, the positive electrode connection patch 111, the negative electrode connection patch 121 and the heat dissipation connection patch 161 can be metal foils of a certain shape. The metal foil can increase the contact area at the connection between the PCB board 100 and the positive / negative electrode of the battery, on the one hand to ensure the stability of the circuit connection; on the other hand, the metal foil can be used to dissipate the heat on the connection path between the PCB board 100 and the positive / negative electrode of the battery, thereby improving the heat dissipation effect. The bottom surfaces of the positive electrode connection patch 111, the negative electrode connection patch 121 and the heat dissipation connection patch 161 can be welded to the PCB board 100. This embodiment does not specifically limit the shape and material of the metal foil. For example, Figure 2 As shown, the positive electrode connection patch 111, the negative electrode connection patch 121 and the heat dissipation connection patch 161 can be set as rectangular copper foil.

[0041] Optionally, Figure 3 FIG. 1 is a schematic diagram of the structure of another battery management component provided according to an embodiment of the present invention. Figure 1 and Figure 3 The BMS control board 200 includes a first connection portion 210, a second connection portion 220 and at least one third connection portion 230, and the first connection portion 210, the second connection portion 220 and the third connection portion 230 include a plurality of connection grooves 300; the connection grooves 300 are arranged at the edge of the BMS control board 200; the first end of the BMS control board 200 is connected to the current control module 140 through the connection groove 300 of the first connection portion 210, the second end of the BMS control board 200 is connected to the current limiting module 150 through the connection groove 300 of the second connection portion 220, and the third end of the BMS control board 200 is connected to the heat dissipation module 160 through the connection groove 300 of the third connection portion 230.

[0042] Specifically, the first connection part 210, the second connection part 220 and the third connection part 230 can be respectively arranged on different end surfaces of the BMS control board 200, so as to reduce the heat dissipation effect between different connections. The BMS control board 200 has a certain thickness, and along the thickness direction, the edge parts of different end surfaces of the BMS control board 200 are provided with different numbers of connection grooves 300. The BMS control board 200 can be connected to the current control module 140, the current limiting module 150 and the heat dissipation module 160 through the connection grooves 300 on the first connection part 210, the second connection part 220 and the third connection part 230, respectively. The connection grooves 300 can increase the connection area between the BMS control board 200 and the current control module 140, the current limiting module 150 and the heat dissipation module 160, so as to further improve the heat dissipation effect. This embodiment does not specifically limit the shape, size and number of the connection grooves 300 on different connection parts. For example, as Figure 3 As shown, six arc-shaped connecting grooves 300 may be respectively provided on the first connecting portion 210 and the second connecting portion 220 , and two arc-shaped connecting grooves 300 may be provided on the third connecting portion 230 .

[0043] Optionally, based on the above embodiment, see Figure 1 and Figure 3 The connection groove 300 is also used to connect the BMS control board 200 to the PCB board 100 .

[0044] Specifically, a metal soft wire can be arranged in the connection groove 300, and the BMS control board 200 is fixedly connected to the PCB board 100 on the basis of the BMS control board 200 being electrically connected to the current control module 140, the current limiting module 150 and the heat dissipation module 160 respectively. Alternatively, solder paste can be applied to the area where the PCB board 100 is connected to the BMS control board 200 through the connection groove 300, and the electrical connection and fixed connection between the BMS control board 200 and the PCB board 100 are realized through a welding process. This embodiment does not specifically limit the connection method between the BMS control board 200 and the PCB board 100 through the connection groove.

[0045] Optionally, Figure 4 FIG. 1 is a schematic diagram of the structure of a PCB board of a battery management component according to an embodiment of the present invention. Figure 4 The PCB board 100 includes an aluminum substrate, which includes: a circuit layer 101; an insulating layer 102, which is disposed on a side of the circuit layer 101 away from the BMS control board 200; and a metal layer 103, which is disposed on a side of the insulating layer away from the BMS control board 200.

[0046] Specifically, the circuit layer 101 may be provided with connecting wires, which may be obtained by etching copper foil. The BMS control board 200, the positive connection module 110, the negative connection module 120, the sampling module 130, the current control module 140 and the current limiting module 150 are arranged on the surface of the circuit layer 101, and are electrically connected through the connecting wires on the circuit layer 101. The insulating layer 102 can bond the circuit layer 101 and the metal layer 103 together, and play the role of insulation and heat conduction. The heat generated by the devices on the surface of the circuit layer 101 when running is quickly transferred to the metal layer 103 through the insulating layer 102, and the heat is transferred out through the metal layer 103 to achieve heat dissipation of the devices on the surface of the circuit layer 101. The metal layer 103 can be an aluminum plate, which provides support for the entire PCB board 100 on the one hand, and improves the heat dissipation effect of the entire PCB board 100 on the other hand.

[0047] The embodiment of the present invention further provides a battery management device. The battery management device provided by the embodiment of the present invention includes the battery management component provided by any of the above embodiments, and has the beneficial effects of the battery management component provided by any of the above embodiments, which will not be described in detail here.

[0048] Optionally, Figure 5 FIG. 1 is a schematic diagram of a battery management device according to an embodiment of the present invention. Figure 2 and Figure 5The battery management device further includes a battery holder 400 , in which a plurality of battery cells are arranged, wherein the positive electrodes of the plurality of battery cells are connected to the positive electrode connection patch 111 through the battery holder 400 , and the negative electrodes of the plurality of battery cells are connected to the negative electrode connection patch 121 through the battery holder.

[0049] Specifically, the battery holder 400 can fix and connect multiple battery cells to form a battery pack. The PCB board 100 can be set on one surface of the battery pack. The positive electrodes of multiple battery cells are collectively connected to form the positive electrode of the battery pack and form the positive electrode connecting piece 410, and the negative electrodes of multiple battery cells are collectively connected to form the negative electrode of the battery pack and form the negative electrode connecting piece 420. The positive electrode connecting piece 410 is connected to the positive electrode connecting patch 111, and the negative electrode connecting piece 420 is connected to the negative electrode connecting patch 121, so that the battery information of the battery pack is transmitted to the BMS control board 200 through the PCB board 100. A battery cell connecting piece 430 is also provided on the battery holder 400, and the positive or negative electrode of a single battery cell can be connected to the heat dissipation connecting patch 161 through the battery cell connecting piece 430, and the information of a single battery cell is transmitted to the BMS control board 200 through the PCB board 100.

[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 executed 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 invention. 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 invention should be included in the protection scope of the present invention.

Claims

1. A battery management component, characterized in that: include: PCB board and BMS control board; The BMS control board, the positive electrode connection module, the negative electrode connection module, the sampling module, the current control module and the current limiting module are arranged on one side of the PCB board; the BMS control board, the positive electrode connection module, the negative electrode connection module, the sampling module, the current control module and the current limiting module are arranged at intervals; One end of the negative electrode connection module is connected to the negative electrode of the battery, the other end of the negative electrode connection module is connected to one end of the sampling module through the PCB board, the other end of the sampling module is connected to one end of the current control module through the PCB board, and the other end of the current control module is connected to the first end of the BMS control board through the PCB board; One end of the positive electrode connection module is connected to the positive electrode of the battery, the other end of the positive electrode connection module is connected to one end of the current limiting module through the PCB board, and the other end of the current limiting module is connected to the second end of the BMS control board.

2. The battery management assembly according to claim 1, characterized in that: It also includes at least one heat dissipation module, one end of the heat dissipation module is connected to the battery, the other end of the heat dissipation module is connected to the third end of the BMS control board through the PCB board, and the third end of the BMS control board collects battery information of the battery.

3. The battery management assembly according to claim 2, characterized in that: The positive electrode connection module comprises a positive electrode connection patch, the top surface of the positive electrode connection patch is connected to the positive electrode of the battery, and the bottom surface of the positive electrode connection patch is connected to the PCB board; The negative electrode connection module comprises a negative electrode connection patch, the top surface of the negative electrode connection patch is connected to the negative electrode of the battery, and the bottom surface of the negative electrode connection patch is connected to the PCB board; The heat dissipation module comprises a heat dissipation connection patch, the top surface of the heat dissipation connection patch is connected to the positive / negative pole of the battery, and the bottom surface of the heat dissipation connection patch is connected to the PCB board.

4. The battery management assembly according to claim 2, characterized in that: The BMS control board includes a first connection portion, a second connection portion and at least one third connection portion, wherein the first connection portion, the second connection portion and the third connection portion include a plurality of connection grooves; the connection grooves are arranged at the edge of the BMS control board; The first end of the BMS control board is connected to the current control module through the connecting groove of the first connecting part, the second end of the BMS control board is connected to the current limiting module through the connecting groove of the second connecting part, and the third end of the BMS control board is connected to the heat dissipation module through the connecting groove of the third connecting part.

5. The battery management assembly according to claim 4, characterized in that: The connecting groove is also used to connect the BMS control board to the PCB board.

6. The battery management assembly according to claim 1, characterized in that: The sampling module includes a sampling resistor, the current control module includes a MOS tube, and the current limiting module includes a fuse.

7. The battery management assembly according to claim 1, characterized in that: The PCB board includes an aluminum substrate, and the aluminum substrate includes: Circuit layer, An insulating layer, disposed on a side of the circuit layer away from the BMS control board; The metal layer is arranged on a side of the insulating layer away from the BMS control board.

8. The battery management assembly according to claim 2, characterized in that: The positive electrode connection patch, the negative electrode connection patch and the heat sink patch include copper.

9. A battery management device, characterized in that: The battery management component comprises the battery management component according to any one of claims 1 to 8.

10. The battery management device according to claim 9, characterized in that: It also includes a battery holder, in which a plurality of battery cells are arranged, the positive electrodes of the plurality of battery cells are connected to the positive electrode connection patch through the battery holder, and the negative electrodes of the plurality of battery cells are connected to the negative electrode connection patch through the battery holder.

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