Slave control device and battery management system

Abstract

The utility model discloses a slave control device and a battery management system. According to the slave control device, a shell is provided with a sensing hole and at least two interface holes, a sensing cover is detachably fixed to the position of the sensing hole of the shell and covers the sensing hole, the sensing cover is provided with a plurality of air inlet holes, a control module is arranged in the shell, and a sensing module is arranged in the sensing cover and connected with the control module through the sensing hole of the shell. The control module is provided with a control interface and at least two battery cell interfaces, and the control interface and the battery cell interfaces are arranged in the interface holes in a penetrating manner; the shell is used for protecting the control module; the sensing cover is used for protecting the sensing module; the sensing module is used for detecting fire smoke information; the control module is used for collecting state information of the battery cells and judging whether thermal runaway happens to the battery cells or not according to the fire smoke information. By adopting the scheme, the wiring of the slave control device is reduced, the structure of the slave control device is simplified, the integration level of the slave control device is improved, and the communication anti-interference capability of the sensing module is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of battery management technology, and in particular to a slave control device and a battery management system. Background Technology

[0002] The energy storage system consists of a master controller, slave controllers, and a battery pack. The main function of the slave controller is to monitor and manage the operating status of the battery pack, ensuring its safe, efficient, and stable operation. The slave controller monitors key parameters of the battery pack in real time, such as voltage and temperature.

[0003] With increasing emphasis on the safety of energy storage systems, sensors are now commonly added to control devices to detect thermal runaway of battery packs.

[0004] However, in the existing technology, the sensor is connected to the slave device through a wiring harness to realize communication between the slave device and the sensor. The structure of the slave device is relatively complicated and the integration is low, and the communication anti-interference capability of the sensor is poor. Utility Model Content

[0005] This invention provides a slave control device and a battery management system to reduce wiring, simplify the structure of the slave control device, improve the integration of the slave control device, and enhance the communication anti-interference capability of the sensing module.

[0006] According to one aspect of the present invention, a slave control device is provided, the slave control device comprising: a housing, a sensing cover, a control module, and a sensing module;

[0007] The outer casing is provided with a sensing hole and at least two interface holes. The sensing cover is detachably fixed to the sensing hole position of the outer casing and covers the sensing hole. The sensing cover is provided with multiple air inlets. The control module is disposed inside the outer casing. The sensing module is disposed inside the sensing cover and connected to the control module through the sensing hole of the outer casing. The control module is provided with a control interface and at least two battery cell interfaces. The control interface and the battery cell interfaces are both inserted through the interface holes.

[0008] The outer casing is used to protect the control module; the sensor cover is used to protect the sensor module; the sensor module is used to detect fire smoke information; the control module is used to collect the status information of the battery cell, and to determine whether the battery cell has experienced thermal runaway based on the fire smoke information.

[0009] Optionally, the sensor cover is provided with at least one buckle, one end of which is provided with a fixing protrusion. Around the edge of the sensor hole of the outer shell, there are buckle holes that match the buckle and protrusion holes that match the fixing protrusion. The buckle holes and the protrusion holes are arranged adjacent to each other, and the fixing protrusion engages with the protrusion holes.

[0010] Optionally, the housing includes: a base plate and a bottomless protective shell;

[0011] The base plate has multiple base plate protrusions, and the bottomless protective shell has multiple fixing grooves. The base plate protrusions correspond one-to-one with the fixing grooves, and the base plate protrusions are engaged with the fixing grooves. The sensing hole is located on the top surface of the bottomless protective shell, and the interface hole is located on the side surface of the bottomless protective shell.

[0012] Optionally, the control module includes: a control interface, at least two cell interfaces, at least two control boards, multiple support columns, and at least one connecting cable;

[0013] The control boards are stacked vertically, and each control board is connected to the battery cell interface. The control interface is located on the bottom control board. The support column is fixed between two adjacent control boards, and the control boards are connected by the connecting cable.

[0014] Optionally, the control board is provided with multiple fixing through holes, and the control board is fixedly connected to the support column through the fixing through holes.

[0015] Optionally, the support post includes a through-hole threaded post.

[0016] Optionally, the control module further includes: a socket;

[0017] The socket is located on the topmost control board, and the sensing module is connected to the topmost control board through the socket.

[0018] Optionally, the sensing module is provided with a sealing ring, the outer diameter of which is greater than or equal to the diameter of the sensing hole of the housing, and the sealing ring is in close contact with the housing when the sensing module is disposed inside the sensing cover.

[0019] Optionally, the cell interface includes: at least one voltage pin and at least one temperature pin;

[0020] The number of voltage pins is the same as the number of voltage pins.

[0021] According to another aspect of the present invention, a battery management system is also provided, the battery management system comprising: a master control device and at least one slave control device as described in any of the embodiments.

[0022] In this embodiment of the invention, the sensing module is housed inside the sensing cover outside the housing and connected to the control module through the sensing hole of the housing. The sensing module detects fire smoke information through the air inlet of the sensing cover, which helps to reduce the wiring of the slave control device, simplify the structure of the slave control device, improve the integration of the slave control device, and enhance the communication anti-interference capability of the sensing module.

[0023] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a side view of a slave control device provided in an embodiment of the present utility model;

[0026] Figure 2 This is a top view of a slave control device provided in an embodiment of the present utility model;

[0027] Figure 3 This is an exploded view of a slave control device provided in an embodiment of this utility model;

[0028] Figure 4 This is an enlarged view of a sensor cover provided in an embodiment of this utility model;

[0029] Figure 5 This is an enlarged view of another sensing cover provided in an embodiment of this utility model;

[0030] Figure 6 This is a top view of the outer casing provided in an embodiment of the present utility model;

[0031] Figure 7 It is along Figure 2 A cross-sectional view cut by section line AA in the middle;

[0032] Figure 8 This is a schematic diagram of the control module provided in an embodiment of the present utility model;

[0033] Figure 9 This is a schematic diagram of a battery management system provided in an embodiment of the present invention. Detailed Implementation

[0034] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0035] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0036] This utility model embodiment provides a slave control device. This slave control device is suitable for use in a battery management system to detect battery status. In this embodiment, the sensing module is housed within a sensing cover outside the housing and connected to the control module through a sensing hole in the housing. The sensing module detects fire smoke information through an air inlet in the sensing cover. This reduces wiring in the slave control device, simplifies its structure, improves its integration, and enhances the communication anti-interference capability of the sensing module. Figure 1 This is a side view of a slave control device provided in an embodiment of the present utility model. Figure 2 This is a top view of a slave control device provided in an embodiment of this utility model. Figure 3 This is an exploded view of a slave control device provided in an embodiment of this utility model. (Combined with...) Figure 1 , Figure 2 and Figure 3 The slave control device includes: housing 110, sensing cover 120, control module 130 and sensing module 140.

[0037] The housing 110 is provided with a sensing hole 10 and at least two interface holes 20. The sensing cover 120 is detachably fixed to the sensing hole 10 of the housing 110 and covers the sensing hole 10. The sensing cover 120 is provided with multiple air inlets. The control module 130 is disposed inside the housing 110. The sensing module 140 is disposed inside the sensing cover 120 and is connected to the control module 130 through the sensing hole 10 of the housing 110. The control module 130 is provided with a control interface 131 and at least two cell interfaces 132. The control interface 131 and the cell interfaces 132 are both inserted through the interface holes 20. The housing 110 is used to protect the control module 130. The sensing cover 120 is used to protect the sensing module 140. The sensing module 140 is used to detect fire smoke information. The control module 130 is used to collect the status information of the cell and to determine whether the cell has thermal runaway based on the fire smoke information.

[0038] Specifically, the sensor cover 120 has a certain space inside and is detachably fixed to the sensor hole 10 of the outer casing 110. The sensor module 140 is disposed inside the sensor cover 120 and is connected to the control module 130 through the sensor hole 10 of the outer casing 110. That is, the sensor module 140 is at least partially exposed outside the outer casing 110, and the sensor cover 120 covers the part of the sensor module 140 exposed outside the outer casing 110. The sensor cover 120 is provided with multiple air inlets, and the interior and exterior of the sensor cover 120 are interconnected. The sensor module 140 detects external smoke through the air inlets of the sensor cover 120 to obtain fire smoke information.

[0039] The control module 130 is disposed inside the housing 110, and the control interface 131 and the cell interface 132 of the control module 130 pass through the interface holes 20 of the housing 110. The number of interface holes 20 provided in the housing 110 is the same as the sum of the number of control interfaces 131 and cell interfaces 132 provided in the control module 130.

[0040] The control module 130 detects the status parameters (e.g., voltage and temperature) of the battery cell through the battery cell interface 132. The control module 130 evaluates the status of the battery cell based on these parameters and determines whether thermal runaway has occurred based on the fire smoke information detected by the sensor module 140. The control module 130 communicates with a host computer (e.g., a main control device, fire suppression system, and / or alarm device) through the control interface 131. When the slave control device is connected to a fire suppression system and an alarm device, the slave control device can also activate the fire suppression system and alarm device to achieve fire extinguishing, cooling, and warning. The alarm device can be, for example, an audible and visual alarm. For example, when the fire smoke information meets the thermal runaway fire smoke information condition (the concentration of one or more gas components contained in the fire smoke is greater than or equal to the concentration threshold corresponding to that gas component), the control module 130 considers that at least one battery cell has experienced thermal runaway; when the fire smoke information does not meet the thermal runaway fire smoke information condition (the concentration of all gas components contained in the fire smoke is less than the concentration threshold corresponding to each gas component), the control module 130 considers that no battery cell has experienced thermal runaway. The thermal runaway fire smoke information condition includes the concentration thresholds of each component of the fire smoke. It should be noted that the concentration thresholds of each component of the fire smoke in the thermal runaway fire smoke information condition can be set according to the needs of actual application, and this embodiment does not impose any restrictions on this.

[0041] In this embodiment of the utility model, the sensing module 140 is disposed inside the sensing cover 120 outside the housing 110, and is connected to the control module 130 through the sensing hole 10 of the housing 110. The sensing module 140 detects fire smoke information through the air inlet of the sensing cover 120, which helps to reduce the wiring of the slave control device, simplify the structure of the slave control device, improve the integration of the slave control device, and enhance the communication anti-interference capability of the sensing module 140.

[0042] Based on the above embodiments, optionally, refer to... Figure 3 The sensing module 140 is provided with a sealing protrusion 1401. The outer diameter of the sealing protrusion 1401 is greater than or equal to the diameter of the sensing hole 10 of the outer casing 110. When the sensing module 140 is disposed inside the sensing cover 120, the sealing protrusion 1401 is in close contact with the outer casing 110. Specifically, when the sensing module 140 is disposed inside the sensing cover 120, the sealing protrusion 1401 seals the sensing hole 10, thereby isolating the interior of the outer casing and preventing dust or debris from entering the outer casing 110, thus improving the operational safety of the slave control device.

[0043] Based on the above embodiments, optionally, refer to... Figure 3 The outer casing 110 includes: a base plate 111 and a bottomless protective shell 112.

[0044] The base plate 111 has multiple base plate protrusions 1111, and the bottomless protective shell 112 has multiple fixing grooves 1121. The base plate protrusions 1111 and fixing grooves 1121 correspond one-to-one, and the base plate protrusions 1111 and fixing grooves 1121 engage. A sensing hole 10 is located on the top surface of the bottomless protective shell 112, and an interface hole 20 is located on the side surface of the bottomless protective shell 112. When the bottomless protective shell 112 is connected and fixed to the base plate 111, the base plate protrusions 1111 are engaged within the fixing grooves 1121, preventing the connection between the bottomless protective shell 112 and the base plate 111 from loosening due to external factors, thus preventing the bottomless protective shell 112 from detaching from the base plate 111.

[0045] Figure 4 This is an enlarged view of a sensor cover provided in an embodiment of this utility model. Figure 5 This is an enlarged view of another sensing cover provided in an embodiment of this utility model. Figure 6 This is a top view of the outer casing provided in an embodiment of the present utility model. Optionally, based on the above embodiments, and in conjunction with... Figure 4 and Figure 5 The sensor cover 120 is provided with at least one latch 121, and one end of the latch 121 is provided with a fixing protrusion 122. Each latch 121 is provided with a fixing protrusion 122. (Refer to...) Figure 6 Around the edge of the sensing hole 10 of the outer casing 110, there are snap holes 11 that match the snap fastener 121 and protrusion holes 12 that match the fixing protrusion 122. The snap holes 11 and protrusion holes 12 are arranged adjacent to each other, and the fixing protrusion 121 is engaged with the protrusion holes 11. The number of snap holes 11 is the same as the number of protrusion holes 12. Figure 7 It is along Figure 2 A cross-sectional view taken along section line AA. (Refer to...) Figure 7 For example, when the sensor cover 120 is connected to the housing 110, the buckle 121 of the sensor cover 120 passes through the sensing hole 10 of the housing 110 and rotates in the direction of the protrusion 12, so that the fixing protrusion 122 provided on the buckle 121 engages with the protrusion 12, thereby preventing the sensor cover 120 from becoming loose due to external reasons and avoiding the sensor cover 120 from falling off.

[0046] Figure 8 This is a schematic diagram of the control module provided in an embodiment of the present invention. Optionally, based on the above embodiments, refer to... Figure 8 The control module 130 includes: a control interface 131, at least two cell interfaces 132, at least two control boards 133, multiple support posts 134, and at least one connecting cable (not shown in the figure).

[0047] Each control board 133 is stacked vertically, and each control board 133 is connected to a cell interface 132. The control interface 131 is located on the bottom control board 133. The support column 134 is fixedly installed between two adjacent control boards 133. Each control board 133 is connected by a connecting cable.

[0048] Each control panel 133 has a fixing through hole 136, and the fixing through holes 136 on each control panel 133 are in the same position. The support column 134 is fixedly installed between the fixing through holes 136 of two adjacent control panels 133.

[0049] For example, the support column 134 can be a through-hole threaded column. The support column 134 and the control board 133 can be fixed with screws, which pass through the fixing through hole 136 of the control board 133 to fix the support column 134.

[0050] It should be noted that the cell interface 132 is provided with at least one voltage pin and at least one temperature pin. The number of voltage pins is the same as the number of temperature pins. The cell is connected to the control board 133 via the voltage pin and the temperature pin; one voltage pin connects to only one cell, and similarly, one temperature pin connects to only one cell. In practical applications, the cell interface 132 can be provided with multiple voltage pins and multiple temperature pins. The number of voltage pins and temperature pins in the cell interface 132 can be set according to actual needs, and this embodiment does not impose any limitations on this. The control board 133 detects the voltage of the cell via the voltage pin and detects the temperature of the cell via the temperature pin. Exemplarily, both the voltage pin and the temperature pin can be pins.

[0051] Based on the above embodiments, optionally, refer to... Figure 8 The control module 130 also includes a socket 135.

[0052] The socket 135 is located on the top control board 133, and the sensor module 140 is connected to the top control board 133 through the socket 135.

[0053] Specifically, the sensor module 140 is detachably connected to the socket 135. Connecting the sensor module 140 to the control board 133 via the socket 135 reduces the difficulty of disassembling the sensor module 140 and improves its maintenance convenience. When the sensor module 140 malfunctions, it can be directly unplugged from the socket 135 for maintenance. For example, after the sensor module 140 is unplugged from the socket 135, the user can insert a working sensor module 140 to maintain the normal operation of the slave device. For example, the sensor module 140 can be a carbon monoxide sensor.

[0054] This utility model embodiment also provides a battery management system. Figure 9 This is a schematic diagram of a battery management system provided in an embodiment of this utility model. (Refer to...) Figure 9 The battery management system includes a master controller 200 and at least one slave controller 100 provided in any of the embodiments. Each slave controller 100 is connected to the master controller 200.

[0055] It should be noted that the battery management system 200 provided in this embodiment has the beneficial effects of the slave control device 100 provided in any of the above embodiments, and will not be described again here.

[0056] It should be understood that the various forms of the process shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this utility model can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this utility model can be achieved, and this is not limited herein.

[0057] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A slave control device, characterized in that, The application relates to a fire smoke sensor for battery pack, which comprises the following parts: a shell, a sensing cover, a control module and a sensing module; the shell is provided with a sensing hole and at least two interface holes, the sensing cover is detachably fixed at the position of the sensing hole of the shell and covers the sensing hole, the sensing cover is provided with a plurality of air inlet holes, the control module is arranged in the shell, the sensing module is arranged in the sensing cover and connected with the control module through the sensing hole of the shell, the control module is provided with a control interface and at least two battery cell interfaces, and the control interface and the battery cell interfaces are arranged through the interface holes; the shell is used for protecting the control module; the sensing cover is used for protecting the sensing module; the sensing module is used for detecting fire smoke information; and the control module is used for collecting state information of the battery cell and judging whether the battery cell is in thermal runaway according to the fire smoke information.

2. The slave device according to claim 1, wherein The sensing cover is provided with at least one buckle, one end of the buckle is provided with a fixing protrusion, a buckle hole matched with the buckle and a protrusion hole matched with the fixing protrusion are arranged around the edge of the sensing hole of the shell, the buckle hole and the protrusion hole are arranged adjacently, and the fixing protrusion is clamped with the protrusion hole.

3. The slave device according to any one of claims 1-2, wherein The shell comprises a bottom plate and a bottomless protective shell. The bottom plate is provided with a plurality of bottom plate protrusions, the bottomless protective shell is provided with a plurality of fixing grooves, the bottom plate protrusions and the fixing grooves are in one-to-one correspondence, the bottom plate protrusions are clamped with the fixing grooves, the sensing hole is arranged on the top surface of the bottomless protective shell, and the interface holes are arranged on the side surface of the bottomless protective shell.

4. The slave device of claim 1, wherein The control module comprises a control interface, at least two battery cell interfaces, at least two control boards, a plurality of support columns and at least one connecting flat cable. The control boards are arranged in a vertical direction, the control boards are connected with the battery cell interfaces, the control interface is arranged on the bottommost control board, the support columns are fixed between two adjacent control boards, and the control boards are connected through the connecting flat cable.

5. The slave device according to claim 4, wherein The control board is provided with a plurality of fixing through holes, and the control board is fixedly connected with the support columns through the fixing through holes.

6. The slave device of claim 4, wherein, The support column comprises a through-hole threaded column.

7. The slave device of claim 4, wherein, The control module further comprises a socket. The socket is arranged on the uppermost control board, and the sensing module is connected with the uppermost control board through the socket.

8. The slave device of claim 1, wherein, The sensing module is provided with a sealing protruding ring, the outer diameter of the sealing protruding ring is greater than or equal to the diameter of the sensing hole of the shell, and the sealing protruding ring is in close contact with the shell when the sensing module is arranged in the sensing cover.

9. The slave device of claim 1, wherein, The battery cell interface comprises at least one voltage pin and at least one temperature pin. The number of voltage pins is the same as that of the voltage pins.

10. A battery management system, characterized by, The application relates to a fire smoke sensor for battery pack, which comprises the following parts: a master control device and at least one slave control device as claimed in any one of claims 1-9.

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