Battery pack structure, method, management system, assembly and vehicle

Abstract

The invention relates to a battery pack structure, a battery humidity detection method, a battery management system, a battery assembly and a vehicle. The battery pack structure comprises a shell; a battery bin and a drying bin communicated with the battery bin are arranged in the shell; the battery compartment is used for mounting battery cells; a drying agent is contained in the drying bin and used for absorbing moisture in the battery bin. The drying bin is arranged to communicate with the battery bin, and a drying agent is contained in the drying bin, so that the drying agent can absorb moisture in the drying bin and the battery bin, and condensate water generated by excessive moisture in the battery bin is avoided; an independent drying bin is arranged, so that moisture in the battery bin can be removed by regularly replacing a drying agent in the drying bin, and the humidity in the battery bin is ensured to be within a proper range; when the battery pack structure is applied to a vehicle, the drying bin can be directly opened to replace the drying agent, the battery bin does not need to be opened, the waterproof grade of the battery pack structure is not affected, and the maintenance difficulty of the battery pack structure is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of batteries, and in particular relates to a battery pack structure, a battery humidity detection method, a battery management system, a battery assembly and a vehicle. Background Art

[0002] New energy vehicles have received full attention and development in recent years due to their advantages of energy saving, low energy consumption and low pollution. Among them, the battery pack structure is an important component of new energy vehicles. The humidity inside the battery pack structure is easily affected by the environment and changes significantly during the use of the vehicle. The battery cells of the battery pack structure can only play their good performance when working in a suitable humidity environment, otherwise the service life of the battery cells will be sharply shortened and the driving safety will be seriously reduced.

[0003] When the humidity in the battery pack structure exceeds the appropriate range, the battery pack structure is usually disassembled to remove the moisture in the battery pack structure so that the humidity in the battery pack structure is within the appropriate range to ensure the safety of vehicle driving. Since the battery pack structure has a high requirement for the waterproof level, the waterproof level of the battery pack structure needs to be tested every time the battery pack structure is disassembled and reassembled to verify whether it meets the IP67 waterproof level, which results in the 4S shop being unable to repair the battery pack structure and requiring the battery pack structure to be returned to the factory for repair. This increases the difficulty of repairing the battery pack and increases the repair cost when the battery pack structure only has humidity problems. Summary of the invention

[0004] The present invention provides a battery pack structure, a battery humidity detection method, a battery management system, a battery assembly and a vehicle, so as to reduce the difficulty of repairing the battery pack structure.

[0005] An embodiment of the present invention provides a battery pack structure, comprising a housing; a battery compartment and a drying compartment connected to the battery compartment are provided in the housing;

[0006] The battery compartment is used to install the battery cells;

[0007] The drying chamber contains a desiccant, and the desiccant is used to absorb moisture in the battery chamber.

[0008] Optionally, the battery pack structure further includes a first waterproof and breathable structure; the first waterproof and breathable structure is arranged at the connecting point between the battery compartment and the drying compartment.

[0009] Optionally, the first waterproof breathable structure is a first waterproof breathable membrane or a first waterproof breathable valve.

[0010] Optionally, the battery pack structure further includes a second waterproof and breathable structure disposed on the shell, and the second waterproof and breathable structure is used to connect the battery compartment with the external environment.

[0011] Optionally, the second waterproof breathable structure is a second waterproof breathable membrane or a second waterproof breathable valve.

[0012] Optionally, one end of the drying chamber away from the battery chamber is open outward;

[0013] The battery pack structure also includes a drying protection cover; the drying protection cover is detachably assembled on the shell to close the open end of the drying bin.

[0014] Optionally, a mounting position is provided on a side of the drying protection cover facing the drying bin, and the desiccant is arranged on the mounting position.

[0015] In the battery pack structure provided in the embodiment of the present invention, a drying bin is provided which is connected to the battery bin, and a desiccant is contained in the drying bin so that the desiccant can absorb moisture in the drying bin and the battery bin to avoid condensation water caused by excessive moisture in the battery bin. In addition, an independent drying bin is provided, and the moisture in the battery bin can be removed by regularly replacing the desiccant in the drying bin to ensure that the humidity in the battery bin is within an appropriate range, thereby reducing the difficulty of maintenance, making the operation simpler and quicker, and reducing maintenance costs.

[0016] The present invention also provides a battery humidity detection method, which is applicable to the battery pack structure described in any one of claims 1 to 6;

[0017] The battery humidity detection method comprises:

[0018] Obtaining the current humidity value of the drying chamber;

[0019] A fault judgment is performed based on the current humidity value, a fault judgment result is obtained, and a target control logic corresponding to the fault judgment result is executed.

[0020] Optionally, performing fault judgment based on the current humidity value, obtaining a fault judgment result, and executing a target control logic corresponding to the fault judgment result includes:

[0021] comparing the current humidity value with a first predetermined threshold;

[0022] If the current humidity value is less than a first predetermined threshold, determining that the fault judgment result is that there is no fault, and repeatedly obtaining the current humidity value of the drying chamber;

[0023] If the current humidity value is not less than the first predetermined threshold, the fault judgment result is determined to be a fault, and a fault warning strategy is executed.

[0024] Optionally, the executing fault warning strategy includes:

[0025] If the current humidity value is not less than the first predetermined threshold value, and the current humidity value is less than the second predetermined threshold value, a humidity level 1 fault warning is executed;

[0026] If the current humidity value is not less than the second predetermined threshold value, and the current humidity value is less than the third predetermined threshold value, a humidity level 2 fault warning is executed;

[0027] If the current humidity value is not less than the third predetermined threshold, a humidity level 3 fault warning is executed.

[0028] In the battery humidity detection method provided by the embodiment of the present invention, the current humidity value of the drying bin is obtained, and a fault judgment is performed based on the current humidity value to obtain a fault judgment result, and then the corresponding target control logic is executed according to the fault judgment result; thereby, the user can understand the humidity conditions in the drying bin according to the target control logic corresponding to the fault judgment result, and then understand the humidity conditions in the battery bin, and enable the user to replace the desiccant in the drying bin in time to ensure that the humidity value in the battery bin is within an appropriate range, thereby avoiding excessive moisture in the battery bin to generate condensation water.

[0029] The present invention also provides a battery management system, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the battery humidity detection method as described in any of the aforementioned technical solutions when executing the computer program.

[0030] In the battery management system provided in the embodiment of the present invention, the battery management system can detect the current humidity value in the drying bin in real time, and perform fault judgment based on the current humidity value to obtain a fault judgment result. The battery management system executes a target control logic corresponding to the fault judgment result based on the fault judgment result, thereby enabling the user to understand the humidity conditions in the drying bin according to the target control logic corresponding to the fault judgment result executed by the battery management system, and then understand the humidity conditions in the battery bin, and enable the user to replace the desiccant in the drying bin in time to ensure that the humidity value in the battery bin is within an appropriate range, thereby avoiding condensation water caused by excessive moisture in the battery bin.

[0031] The present invention also provides a battery assembly, comprising the battery pack structure described in any of the aforementioned technical solutions and the battery management system described in any of the aforementioned technical solutions.

[0032] Optionally, the battery assembly also includes a humidity detection device connected to the battery management system; the humidity detection device is arranged in the drying bin, for obtaining a current humidity value of the drying bin, and sending the current humidity value to the battery management system.

[0033] In the battery assembly provided in the embodiment of the present invention, a battery management system is used to obtain the current humidity value in the drying bin of the battery pack structure in real time, and perform fault judgment based on the current humidity value to obtain a fault judgment result. The battery management system executes a target control logic corresponding to the fault judgment result based on the fault judgment result, so that the user can understand the humidity condition in the drying bin according to the target control logic corresponding to the fault judgment result executed by the battery management system, and replace the desiccant in the drying bin in time to ensure that the humidity value in the battery bin is within an appropriate range, thereby avoiding condensation water caused by excessive moisture in the battery bin. This design reduces the difficulty of repairing the battery pack structure, makes the operation simpler and faster, and reduces the maintenance cost.

[0034] The present invention also provides a vehicle, comprising the battery assembly described in any of the aforementioned technical solutions.

[0035] In the vehicle provided by the embodiment of the present invention, a battery management system is used to obtain the current humidity value in the drying bin of the battery pack structure in real time, and a fault judgment is performed based on the current humidity value to obtain a fault judgment result. The battery management system executes a target control logic corresponding to the fault judgment result based on the fault judgment result, so that the user can understand the humidity condition in the drying bin according to the target control logic corresponding to the fault judgment result executed by the battery management system, and replace the desiccant in the drying bin in time to ensure that the humidity value in the battery bin is within an appropriate range, thereby avoiding condensation water caused by excessive moisture in the battery bin. This design reduces the difficulty of repairing the battery pack structure, makes the operation simpler and faster, and reduces the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a partial structural schematic diagram of a battery pack structure provided by an embodiment of the present invention;

[0037] Figure 2 is a flow chart of a battery humidity detection method in one embodiment of the present invention;

[0038] Figure 3 is another flow chart of a battery humidity detection method according to an embodiment of the present invention;

[0039] Figure 4 is another flow chart of a battery humidity detection method according to an embodiment of the present invention;

[0040] Figure 5 is another flow chart of a battery humidity detection method according to an embodiment of the present invention;.

[0041] The reference numerals in the specification are as follows:

[0042] 1. Shell; 11. Drying chamber; 2. Drying protective cover; 3. Desiccant; 4. First waterproof breathable membrane; 5. Fixing bolts. DETAILED DESCRIPTION

[0043] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0044] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0045] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0046] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0047] like Figure 1 As shown, the battery pack structure provided by the embodiment of the present invention includes a shell 1; a battery compartment and a drying compartment 11 connected to the battery compartment are provided in the shell 1; the battery compartment is used to install battery cells; the drying compartment 11 contains a desiccant 3, and the desiccant 3 is used to absorb moisture in the battery compartment.

[0048] In the battery pack structure provided by the embodiment of the present invention, the battery compartment is the space in the shell 1 for storing the battery cells; the drying compartment 11 is the space in the shell 1 for storing the desiccant 3; the drying compartment 11 is connected to the battery compartment, and the drying compartment 11 contains the desiccant 3, so that the desiccant 3 can absorb moisture in the drying compartment 11 and the battery compartment to avoid condensation water due to excessive moisture in the battery compartment; and an independent drying compartment 11 is provided, and the moisture in the battery compartment can be removed by regularly replacing the desiccant 3 in the drying compartment 11 to ensure that the humidity in the battery compartment is within an appropriate range; when the battery pack structure is applied to a vehicle, the vehicle can directly open the drying compartment 11 at a 4S shop to replace the desiccant 3 without opening the battery compartment, thereby avoiding the 4S shop being unable to repair the battery pack structure due to the need to verify the IP67 waterproof level of the battery pack structure after opening the battery compartment, and there is no need to return to the factory to disassemble the battery compartment for repair, which will not affect the waterproof level of the battery pack structure, thereby reducing the difficulty of repair, making the operation simpler and faster, and reducing the repair cost.

[0049] In one embodiment, the battery pack structure further includes a first waterproof and breathable structure; the first waterproof and breathable structure is disposed at the connection between the battery compartment and the drying compartment 11. In this example, the first waterproof and breathable structure is disposed at the connection between the battery compartment and the drying compartment 11, which can effectively prevent impurities such as water, dust, and oil stains from entering the battery compartment through the connection, which is conducive to better protecting the battery cells in the battery compartment.

[0050] In one embodiment, if Figure 1 As shown, the first waterproof breathable structure is a first waterproof breathable membrane 4 or a first waterproof breathable valve.

[0051] As an example, a first waterproof and breathable membrane 4 is provided at the connection point between the battery compartment and the drying compartment 11. The first waterproof and breathable membrane 4 has a simple structure and is easy to install.

[0052] As another example, a first waterproof breathable valve is provided at the connection point between the battery compartment and the drying compartment 11. The first waterproof breathable valve has greater rigidity and strength, strong pressure bearing and deformation resistance, and better stability in use.

[0053] In one embodiment, the battery pack structure further includes a second waterproof and breathable structure disposed on the housing 1, and the second waterproof and breathable structure is used to connect the battery compartment with the external environment; in this way, the second waterproof and breathable structure can balance the air pressure inside and outside the battery compartment to ensure the safe use of the battery cells in the battery compartment. Preferably, the second waterproof and breathable structure is a waterproof and breathable valve.

[0054] As an example, the second waterproof and breathable structure is a second waterproof and breathable membrane, and the second waterproof and breathable membrane has a simple structure and is easy to install.

[0055] As another example, the second waterproof breathable structure is a second waterproof breathable valve. The second waterproof breathable valve has greater rigidity and strength, strong pressure-bearing and deformation-resistant capabilities, and better stability in use.

[0056] In one embodiment, if Figure 1 As shown, the end of the drying chamber 11 away from the battery chamber is open to the outside; the battery pack structure also includes a drying protective cover 2; the drying protective cover 2 is detachably mounted on the housing 1 to close the open end of the drying chamber 11. In this example, the drying protective cover 2 is arranged relative to the drying chamber 11 and is detachably mounted on the housing 1 to close the open end of the drying chamber 11. With this design, the drying protective cover 2 is detachably connected to the housing 1, which is conducive to replacing the desiccant 3, making the replacement operation simpler and more convenient.

[0057] In this embodiment, the housing 1 is provided with a connecting hole connecting the battery compartment and the drying compartment 11, and the first waterproof breathable membrane 4 is arranged in the connecting hole. That is, the first waterproof breathable membrane 4 completely covers the connecting hole, which can effectively protect the battery cells in the battery compartment.

[0058] In one embodiment, if Figure 1 As shown, a mounting position is provided on one side of the drying protective cover 2 facing the drying bin 11, and the desiccant 3 is arranged on the mounting position. In this example, the desiccant 3 is arranged on the mounting position, that is, the desiccant 3 is connected to the drying protective cover 2. After the drying protective cover 2 and the housing 1 are disassembled, the drying protective cover 2 is moved so that the desiccant 3 is moved out of the drying bin 11 together with the drying protective cover 2, so that the desiccant 3 is easily replaced.

[0059] In one embodiment, if Figure 1 As shown, the drying protection cover 2 is fixed to the housing 1 by fixing bolts 5. In this example, the drying protection cover 2 is fixed to the housing 1 by fixing bolts 5, the threaded connection is stable, the structure is simple, and it is easy to disassemble and assemble.

[0060] The embodiment of the present invention further provides a battery humidity detection method, which is applicable to the battery pack structure described in any of the above embodiments; Figure 2 As shown, the battery humidity detection method can be applied in a battery management system, and the battery humidity detection method includes:

[0061] S201: Obtain the current humidity value of the drying chamber 11;

[0062] The current humidity value is the humidity value in the drying chamber 11 detected at the current moment.

[0063] Specifically, the battery management system can obtain the current humidity value of the drying bin 11, specifically the current humidity value of the drying bin 11 sent by a humidity detection device (including but not limited to a humidity sensor) arranged in the drying bin 11, so as to detect the humidity value of the drying bin 11 in real time.

[0064] S202: Perform fault judgment based on the current humidity value, obtain the fault judgment result, and execute the target control logic corresponding to the fault judgment result.

[0065] Among them, the fault judgment is to judge whether there is a fault with humidity warning requirement in the drying chamber 11 in the battery pack structure according to the current humidity value. The fault judgment result is the result obtained after the fault judgment of the current humidity value. There are many fault judgment results, such as no fault and fault. The target control logic is a custom control logic corresponding to the fault judgment result. Each fault judgment result corresponds to a target control logic.

[0066] Specifically, the battery management system performs fault judgment based on the current humidity value, calls a pre-set fault judgment program, performs fault judgment on the current humidity value, obtains a fault judgment result, and the battery management system executes the target control logic corresponding to the fault judgment result based on the fault judgment result. As an example, when the fault judgment result is that there is no fault, the battery management system executes the target control logic corresponding to the absence of the fault. As another example, when the fault judgment result is that there is a fault, the battery management system executes the target control logic corresponding to the presence of the fault.

[0067] That is to say, the battery management system performs a fault judgment based on the humidity value of the drying bin 11 detected at the current moment, obtains a fault judgment result, and then executes the corresponding target control logic according to the fault judgment result; thereby, the user can understand the humidity conditions in the drying bin 11 according to the target control logic corresponding to the fault judgment result executed by the battery management system, and then understand the humidity conditions in the battery bin, and enable the user to replace the desiccant 3 in the drying bin 11 in time to ensure that the humidity value in the battery bin is within an appropriate range, thereby avoiding excessive moisture in the battery bin to generate condensation water.

[0068] In one embodiment, if Figure 3 As shown, step S202, i.e., performing fault judgment based on the current humidity value, obtaining the fault judgment result, and executing the target control logic corresponding to the fault judgment result, includes the following steps:

[0069] S301: Compare the current humidity value with a first predetermined threshold;

[0070] The first predetermined threshold is a threshold value pre-set to evaluate whether the humidity in the drying chamber 11 reaches the first humidity warning standard. That is, the first humidity warning standard here can be a pre-set standard for evaluating whether the battery pack structure can be identified as having a fault.

[0071] Specifically, the battery management system compares the current humidity value with the numerical value of the first predetermined threshold; when the current humidity value is less than the first predetermined threshold, the battery management system evaluates that the humidity in the drying bin 11 does not reach the first humidity warning standard, that is, there is no humidity warning requirement for the drying bin 11, and it is determined that there is no fault in the battery pack structure; when the current humidity value is not less than the first predetermined threshold, that is, the current humidity value is greater than or equal to the first predetermined threshold, the battery management system evaluates that the humidity in the drying bin 11 reaches the first humidity warning standard, that is, there is a humidity warning requirement for the drying bin 11, and it is determined that there is a fault in the battery pack structure.

[0072] S302: If the current humidity value is less than the first predetermined threshold, it is determined that the fault judgment result is that there is no fault, and the current humidity value of the drying chamber 11 connected to the battery chamber is repeatedly obtained;

[0073] As an example, if the current humidity value is less than the first predetermined threshold value, the battery management system determines based on the comparison result that the humidity in the drying bin 11 does not reach the first humidity warning standard, that is, there is no humidity warning requirement for the drying bin 11, and the battery management system determines that the fault judgment result is that there is no fault in the battery pack structure, and the battery pack structure can continue to be used safely. Then the battery management system obtains the current humidity value of the drying bin 11 again, and compares the current humidity value with the first predetermined threshold value again; thereby, the current humidity value in the drying bin 11 can be detected in real time and compared with the first predetermined threshold value.

[0074] S303: If the current humidity value is not less than the first predetermined threshold, the fault judgment result is determined to be a fault, and a fault warning strategy is executed.

[0075] Among them, the fault warning strategy is a custom-set corresponding warning strategy that is performed when the fault judgment result is that a fault exists.

[0076] As an example, if the current humidity value is not less than the first predetermined threshold, that is, the current humidity value is greater than or equal to the first predetermined threshold, the battery management system determines based on this comparison result that the humidity in the drying bin 11 reaches the first humidity warning standard, that is, there is a humidity warning requirement for the drying bin 11, and the battery management system determines that the fault judgment result is that there is a fault in the battery pack structure, and the battery management system executes the fault warning strategy corresponding to the fault; thereby, the user can be warned in time when the humidity in the drying bin 11 reaches the first humidity warning standard, so that the user can understand the humidity conditions in the drying bin 11 in time, which is conducive to timely replacement of the desiccant 3.

[0077] In one embodiment, if Figure 4 As shown, the fault warning strategy is executed, including:

[0078] S401: If the current humidity value is not less than the first predetermined threshold value, and the current humidity value is less than the second predetermined threshold value, a humidity level 1 fault warning is executed;

[0079] S402: If the current humidity value is not less than the second predetermined threshold value, and the current humidity value is less than the third predetermined threshold value, then execute the humidity level 2 fault warning;

[0080] S403: If the current humidity value is not less than the third predetermined threshold, a humidity level 3 fault warning is executed.

[0081] Among them, the second predetermined threshold is a threshold value pre-set for evaluating whether the humidity in the drying bin 11 reaches the second humidity warning standard. The third predetermined threshold value is a threshold value pre-set for evaluating whether the humidity in the drying bin 11 reaches the third humidity warning standard. The first predetermined threshold value is less than the second predetermined threshold value, and the second predetermined threshold value is less than the third predetermined threshold value. In other words, the first predetermined threshold value, the second predetermined threshold value, and the third predetermined threshold value are standards for judging the fault level of the battery pack structure. Three fault levels are pre-set in the battery management system. The battery management system compares the current humidity value with the numerical values ​​of the first predetermined threshold, the second predetermined threshold and the third predetermined threshold step by step. When the current humidity value is greater than or equal to the first predetermined threshold, and the current humidity value is less than the second predetermined threshold, the humidity value in the drying bin 11 reaches the first humidity warning standard, and the fault in the battery pack structure corresponds to a level one fault; when the current humidity value is greater than or equal to the second predetermined threshold, and the current humidity value is less than the third predetermined threshold, the humidity value in the drying bin 11 reaches the second humidity warning standard, and the fault in the battery pack structure corresponds to a level two fault; when the current humidity value is greater than or equal to the third predetermined threshold, the humidity value in the drying bin 11 reaches the third humidity warning standard, and the fault in the battery pack structure corresponds to a level three fault.

[0082] Humidity level 1 fault warning is a custom-set fault warning corresponding to level 1 fault. Humidity level 2 fault warning is a custom-set fault warning corresponding to level 2 fault. Humidity level 3 fault warning is a custom-set fault warning corresponding to level 3 fault.

[0083] As an example, the battery management system first compares the current humidity value with the numerical value of the first predetermined threshold. When the comparison result is that the current humidity value is not less than the first predetermined threshold, that is, the current humidity value is greater than or equal to the first predetermined threshold, the battery management system then compares the current humidity value with the numerical value of the second predetermined threshold. When the comparison result is that the current humidity value is less than the second predetermined threshold, the battery management system determines based on the above two comparison results that the humidity value in the drying chamber 11 reaches the first humidity warning standard, but does not reach the second humidity warning standard, and then determines that the fault judgment result is that there is a level one fault in the battery pack structure. The battery management system executes the corresponding humidity level one fault warning based on the fault judgment result of the level one fault. Specifically, the humidity level one fault warning can be that the battery management system uploads the current humidity value data to the big data platform for warning record to facilitate subsequent data analysis. The humidity level one fault warning can also be set to other warning operations.

[0084] As an example, the battery management system first compares the current humidity value with the numerical value of the first predetermined threshold. When the comparison result is that the current humidity value is not less than the first predetermined threshold, that is, the current humidity value is greater than or equal to the first predetermined threshold, the battery management system then compares the current humidity value with the numerical value of the second predetermined threshold. When the comparison result is that the current humidity value is not less than the second predetermined threshold, that is, the current humidity value is greater than or equal to the second predetermined threshold, the battery management system then compares the current humidity value with the numerical value of the third predetermined threshold. When the comparison result is that the current humidity value is less than the third predetermined threshold, the battery management system determines based on the above three comparison results that the humidity value in the drying chamber 11 reaches the second humidity warning standard, but does not reach the third humidity warning standard, and then determines that the fault judgment result is that there is a secondary fault in the battery pack structure, and the battery management system executes the corresponding humidity secondary fault warning based on the fault judgment result of the secondary fault. Specifically, the humidity secondary fault warning is that the battery management system uploads the fault judgment result of the secondary fault to the vehicle alarm system. The vehicle alarm system alarms according to the preset alarm strategy. The preset alarm strategy includes but is not limited to light warning, sound warning or information reminder, and timely notifies the user of the humidity condition in the drying chamber 11, replaces the desiccant 3, thereby ensuring that the humidity of the battery chamber is within an appropriate range, and avoiding excessive moisture in the battery chamber to produce condensed water. The second-level humidity fault warning can also be set to other warning operations different from the first-level humidity fault warning.

[0085] As an example, the battery management system first compares the current humidity value with the numerical value of the first predetermined threshold. When the comparison result is that the current humidity value is not less than the first predetermined threshold, that is, the current humidity value is greater than or equal to the first predetermined threshold, the battery management system then compares the current humidity value with the numerical value of the second predetermined threshold. When the comparison result is that the current humidity value is not less than the second predetermined threshold, that is, the current humidity value is greater than or equal to the second predetermined threshold, the battery management system then compares the current humidity value with the numerical value of the third predetermined threshold. When the comparison result is that the current humidity value is not less than the third predetermined threshold, that is, the current humidity value is greater than or equal to the third predetermined threshold, the battery management system determines that the humidity value in the drying chamber 11 reaches the third humidity warning standard based on the above three comparison results, and determines that the fault judgment result is that there is a third level fault in the battery pack structure. The battery management system executes the corresponding humidity third level fault warning based on the fault judgment result of the third level fault. Specifically, the humidity level 3 fault warning is that the battery management system uploads the fault judgment result of the level 3 fault to the VCU (vehicle control unit, referred to as VCU), and the VCU limits the output power of the vehicle according to the fault judgment result, thereby controlling the driving speed of the vehicle to ensure the safety of the vehicle and the user. The humidity level 3 fault warning can also be set to other warning operations that are different from the humidity level 1 fault warning and the humidity level 2 fault warning.

[0086] In this embodiment, the battery management system determines the level of fault in the battery pack structure based on the results of comparing the current humidity value with the first predetermined threshold, the second predetermined threshold and the third predetermined threshold, and the battery management system then executes a fault warning corresponding to the current fault level; this allows the user to understand the humidity conditions in the drying bin 11 based on different fault warnings, which is conducive to timely replacement of the desiccant 3 and avoiding condensation caused by excessive moisture in the battery bin.

[0087] As a preferred embodiment, the first predetermined threshold is set to 70% rh, the second predetermined threshold is set to 80% rh, and the third predetermined threshold is set to 95% rh. When the current humidity value is <70% rh, the fault judgment result is that there is no fault in the battery pack structure, and the battery management system repeatedly executes to obtain the current humidity value of the drying chamber 11; when 70% rh≤current humidity value<80% rh, the fault judgment result is that there is a first-level fault in the battery pack structure, and the battery management system executes a first-level humidity fault warning; when 80% rh≤current humidity value<95% rh, the fault judgment result is that there is a second-level fault in the battery pack structure, and the battery management system executes a second-level humidity fault warning; when the current humidity value is ≥95% rh, the fault judgment result is that there is a third-level fault in the battery pack structure, and the battery management system executes a third-level humidity fault warning. This design can more reasonably and accurately judge whether the desiccant 3 needs to be replaced at this time to avoid excessive moisture in the battery compartment to produce condensed water.

[0088] In one embodiment, if Figure 5 As shown, before step S201: obtaining the current humidity value of the drying chamber 11, the battery humidity detection method further includes:

[0089] S501: Detect whether the battery management system is faulty and obtain the fault detection result.

[0090] The fault detection result is the result obtained after the fault detection of the battery management system. There are two types of fault detection results, one is the presence of a fault, and the other is the absence of a fault.

[0091] Specifically, the battery management system performs fault detection on itself, calls a pre-set system self-test program, performs fault detection and analysis on the battery management system itself, obtains a fault detection result, and the battery management system executes operation steps corresponding to the fault detection result based on the fault detection result. Furthermore, the battery management system needs to perform fault detection on itself every time it is powered on.

[0092] S502: If the fault detection result is that there is no fault, the current humidity value of the drying chamber 11 is obtained;

[0093] Specifically, after the battery management system performs fault detection on itself, if no fault is detected in the battery management system itself, the fault detection result is that there is no fault. Then, the battery management system obtains the current humidity value of the drying bin 11, and performs a fault judgment based on the current humidity value to obtain a fault judgment result. In this way, the battery management system can avoid the impact of the fault of the battery management system itself on the humidity detection of the drying bin 11, thereby ensuring the accuracy of the humidity detection of the drying bin 11.

[0094] S503: If the fault detection result is that a fault exists, perform fault inspection and troubleshooting to provide early warning.

[0095] Among them, the fault inspection and troubleshooting warning is a warning operation of the fault inspection and troubleshooting performed when the fault detection result is that a fault exists.

[0096] Specifically, after the battery management system performs fault detection on itself, if it detects that the battery management system itself has a fault, the fault detection result is that a fault exists. Based on the fault detection result that a fault exists, the battery management system uploads a fault inspection and troubleshooting warning signal to the VCU, so that the VCU inspects and troubleshoots the fault of the battery management system. It should be noted that the VCU can use a method known to those skilled in the art to inspect and troubleshoot the fault of the battery management system, which will not be repeated here.

[0097] The embodiment of the present invention further provides a battery management system, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the battery humidity detection method in the above embodiment is implemented, for example Figure 2 S201-S202 as shown, or Figure 3 S301-S303 as shown, or Figure 4 S401-S403 as shown, or Figure 5 S501-S503 shown are not described again here to avoid repetition.

[0098] In the battery management system provided in the embodiment of the present invention, the current humidity value in the drying bin 11 can be detected in real time, and a fault judgment is performed based on the current humidity value to obtain a fault judgment result. The battery management system executes a target control logic corresponding to the fault judgment result based on the fault judgment result, thereby enabling the user to understand the humidity conditions in the drying bin 11 according to the target control logic corresponding to the fault judgment result executed by the battery management system, and then understand the humidity conditions in the battery bin, and enable the user to replace the desiccant 3 in the drying bin 11 in time to ensure that the humidity value in the battery bin is within an appropriate range, thereby avoiding excessive moisture in the battery bin to generate condensation water.

[0099] An embodiment of the present invention further provides a battery assembly, comprising the battery pack structure in the above embodiment and the battery management system in the above embodiment.

[0100] In the battery assembly provided in the embodiment of the present invention, a battery management system is used to obtain the current humidity value in the drying bin 11 of the battery pack structure in real time, and perform fault judgment based on the current humidity value to obtain a fault judgment result. The battery management system executes a target control logic corresponding to the fault judgment result based on the fault judgment result, so that the user can understand the humidity condition in the drying bin 11 according to the target control logic corresponding to the fault judgment result executed by the battery management system, and replace the desiccant 3 in the drying bin 11 in time to ensure that the humidity value in the battery bin is within an appropriate range, thereby avoiding condensation water caused by excessive moisture in the battery bin. This design reduces the difficulty of repairing the battery pack structure, makes the operation simpler and faster, and reduces the maintenance cost.

[0101] In one embodiment, the battery assembly also includes a humidity detection device connected to the battery management system; the humidity detection device is arranged in the drying bin 11, and is used to obtain the current humidity value of the drying bin 11 and send the current humidity value to the battery management system.

[0102] In this embodiment, a humidity detection device is provided in the drying bin 11, and the current humidity value of the drying bin 11 is detected in real time by the humidity detection device, so as to judge whether the desiccant 3 is absorbed to saturation according to the current humidity value, and then remind the user to replace the desiccant 3 when the desiccant 3 is absorbed to saturation.

[0103] An embodiment of the present invention further provides a vehicle, comprising the battery assembly described in any of the aforementioned embodiments.

[0104] In the vehicle provided by the embodiment of the present invention, the drying bin 11 is connected to the battery bin, and the drying bin 11 contains a desiccant 3, so that the desiccant 3 can absorb moisture in the drying bin 11 and the battery bin; and according to the target control logic executed by the battery management system corresponding to the fault judgment result, the humidity condition in the drying bin 11 can be understood, and the desiccant 3 in the drying bin 11 can be replaced in time to ensure that the humidity value in the battery bin is within a suitable range, and to avoid condensation water due to excessive moisture in the battery bin. This design allows the vehicle to directly open the drying bin 11 at the 4S shop to replace the desiccant 3 without opening the battery bin, avoiding the 4S shop from being unable to repair the battery pack structure due to the need to verify the IP67 waterproof level of the battery pack structure after opening the battery bin. There is no need to return the battery bin to the factory to disassemble the battery bin for repair, which will not affect the waterproof level of the battery pack structure, reducing the difficulty of repair, making the operation simpler and faster, and reducing the repair cost.

[0105] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery pack structure, characterized in that: It comprises a shell; a battery compartment and a drying compartment connected to the battery compartment are arranged in the shell; The battery compartment is used to install the battery cells; The drying chamber contains a desiccant, and the desiccant is used to absorb moisture in the battery chamber.

2. The battery pack structure according to claim 1, characterized in that: The battery pack structure also includes a first waterproof and breathable structure; the first waterproof and breathable structure is arranged at the connection point between the battery compartment and the drying compartment.

3. The battery pack structure according to claim 2, characterized in that: The first waterproof and breathable structure is a first waterproof and breathable membrane or a first waterproof and breathable valve.

4. The battery pack structure according to claim 1, characterized in that: The battery pack structure also includes a second waterproof and breathable structure arranged on the shell, and the second waterproof and breathable structure is used to connect the battery compartment and the external environment.

5. The battery pack structure according to claim 4, characterized in that: The second waterproof and breathable structure is a second waterproof and breathable membrane or a second waterproof and breathable valve.

6. The battery pack structure according to claim 1, characterized in that: One end of the drying chamber away from the battery chamber is open outward; The battery pack structure also includes a drying protection cover; the drying protection cover is detachably assembled on the shell to close the open end of the drying bin.

7. The battery pack structure according to claim 6, characterized in that: A mounting position is provided on one side of the drying protection cover facing the drying bin, and the desiccant is arranged on the mounting position.

8. A battery humidity detection method, characterized in that: Applicable to the battery pack structure according to any one of claims 1 to 7; The battery humidity detection method comprises: Obtaining the current humidity value of the drying chamber; A fault judgment is performed based on the current humidity value, a fault judgment result is obtained, and a target control logic corresponding to the fault judgment result is executed.

9. The battery humidity detection method according to claim 8, characterized in that: The performing fault judgment based on the current humidity value, obtaining a fault judgment result, and executing a target control logic corresponding to the fault judgment result includes: comparing the current humidity value with a first predetermined threshold; If the current humidity value is less than a first predetermined threshold, determining that the fault judgment result is that there is no fault, and repeatedly executing the step of obtaining the current humidity value of the drying chamber; If the current humidity value is not less than the first predetermined threshold, the fault judgment result is determined to be a fault, and a fault warning strategy is executed.

10. The battery humidity detection method according to claim 9, characterized in that: The execution failure warning strategy includes: If the current humidity value is not less than the first predetermined threshold value, and the current humidity value is less than the second predetermined threshold value, a humidity level 1 fault warning is executed; If the current humidity value is not less than the second predetermined threshold value, and the current humidity value is less than the third predetermined threshold value, a humidity level 2 fault warning is executed; If the current humidity value is not less than the third predetermined threshold, a humidity level 3 fault warning is executed.

11. A battery management system, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the battery humidity detection method according to any one of claims 8 to 10 is implemented.

12. A battery assembly, characterized in that: It includes the battery pack structure according to any one of claims 1 to 7 and the battery management system according to claim 11.

13. The battery assembly according to claim 12, characterized in that: The battery assembly also includes a humidity detection device connected to the battery management system; the humidity detection device is arranged in the drying bin, and is used to obtain a current humidity value of the drying bin and send the current humidity value to the battery management system.

14. A vehicle, characterized in that: Comprising the battery assembly as claimed in claim 12 or 13.

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