Signal processing device, battery management device and battery management system

Abstract

The present disclosure provides a signal processing device, comprising: a collection control unit configured to collect an induced voltage; an excitation signal providing unit configured to provide an excitation signal so as to generate the induced voltage; and a detection capacitor connected to the collection control unit and configured to collect the induced voltage. The present disclosure also provides a battery management device and a battery management system.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a signal processing device, a battery management device and a battery management system. BACKGROUND

[0002] In the use of rechargeable batteries, as the battery ages, the shape of the battery will change, and if the deformation of the battery is ignored, an explosion will occur when the battery deforms to a certain extent, thus causing unavoidable losses.

[0003] Therefore, in order to ensure the safety of the use of the battery, the deformation of the battery must be monitored. The current monitoring is either too expensive or not very effective. Moreover, in the process of collecting the battery deformation signal, the signal needs to be collected effectively and accurately. SUMMARY

[0004] In order to solve one of the above technical problems, the present disclosure provides a signal processing device, a battery management device and a battery management system.

[0005] According to one aspect of the present disclosure, a signal processing device comprises:

[0006] a collection control unit, configured to collect an induced voltage of a capacitor plate, wherein the capacitor plate is configured to sense a shape change of a battery pack, the capacitor plate is arranged on a side or an outer side of the battery plate and deforms with the shape change of the battery pack, and when the capacitor plate deforms, the induced voltage generated by the capacitor plate changes accordingly;

[0007] an excitation signal providing unit, configured to provide an excitation signal to the capacitor plate, so that the capacitor plate generates an induced voltage according to the excitation signal; and

[0008] a detection capacitor, connected to the collection control unit and configured to receive a first charge from the capacitor plate to collect the induced voltage,

[0009] wherein after the detection capacitor completes the collection of the induced voltage, the detection capacitor is applied with a second charge opposite in polarity to the first charge, and the induced voltage is calculated according to a time length during which the detection voltage decreases to a threshold voltage.

[0010] According to at least one embodiment of the present disclosure, the signal processing device further comprises a multiplexing unit, configured to select a part of the plurality of capacitor plates, so that the excitation signal providing unit provides an excitation signal to the part of the capacitor plates and the collection control unit and the detection capacitor collect the induced voltage of the part of the capacitor plates.

[0011] According to at least one of the embodiments of the present disclosure, the reverse charging unit is further configured to provide the second electric charge to the detection capacitor after the detection capacitor completes the collection of the induced voltage.

[0012] According to at least one of the embodiments of the present disclosure, the comparison unit is further configured to receive a voltage variation value of the detection capacitor when the second electric charge is provided to the detection capacitor, and output a comparison signal according to the voltage variation value.

[0013] According to at least one of the embodiments of the present disclosure, the detection unit is further configured to compare the comparison signal with the threshold voltage, and change an output signal of the detection unit when the comparison signal is lower than the threshold voltage.

[0014] According to at least one of the embodiments of the present disclosure, the calculation unit is further configured to calculate a time length between an initial time when the second electric charge is provided to the detection capacitor and a time when the output signal of the detection unit is changed.

[0015] According to at least one of the embodiments of the present disclosure, the calculation unit is further configured to calculate a voltage value of the induced voltage according to the time length.

[0016] According to at least one of the embodiments of the present disclosure, the induced charge releasing unit is further configured to connect the capacitor plate to a reset voltage so as to release the electric charge of the capacitor plate.

[0017] According to at least one of the embodiments of the present disclosure, the reset switch is further configured to be connected to the detection unit, and reset the voltage of the detection unit to the reset voltage.

[0018] According to at least one of the embodiments of the present disclosure, the reset voltage is equal to the threshold voltage.

[0019] According to one aspect of the present disclosure, a battery management device comprises the signal processing apparatus as described above.

[0020] According to one aspect of the present disclosure, a battery management system comprises the signal processing apparatus as described above. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the present disclosure and together with the description serve to explain the principles of the present disclosure.

[0022] Figure 1A schematic diagram of a battery safety detection device according to an embodiment of the present disclosure is shown.

[0023] Figure 2 A schematic diagram of a battery safety detection device according to an embodiment of the present disclosure is shown.

[0024] Figure 3 A schematic diagram of a battery safety detection device according to an embodiment of the present disclosure is shown.

[0025] Figure 4 A schematic diagram of a battery safety detection device according to an embodiment of the present disclosure is shown.

[0026] Figure 5 A schematic diagram of a battery safety detection device according to an embodiment of the present disclosure is shown.

[0027] Figure 6 A schematic diagram of a battery safety detection device according to an embodiment of the present disclosure is shown.

[0028] Figure 7 A schematic diagram of a processing device of a battery safety detection device according to an embodiment of the present disclosure is shown.

[0029] Figure 8 A schematic diagram of a processing device of a battery safety detection device according to an embodiment of the present disclosure is shown.

[0030] Figure 9 A schematic diagram of a processing device of a battery safety detection device according to an embodiment of the present disclosure is shown.

[0031] Figure 10 A schematic diagram of a processing device of a battery safety detection device according to an embodiment of the present disclosure is shown.

[0032] Figure 11 A schematic diagram of a processing device of a battery safety detection device according to an embodiment of the present disclosure is shown.

[0033] Figure 12 A schematic diagram of a processing device of a battery safety detection device according to an embodiment of the present disclosure is shown.

[0034] Figure 13 A schematic diagram of a processing device of a battery safety detection device according to an embodiment of the present disclosure is shown.

[0035] Figure 14 A schematic diagram of a signal processing device according to an embodiment of the present disclosure is shown.

[0036] Figure 15 A schematic diagram of a battery management device or system according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0037] The present disclosure will be further described in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are merely exemplary in nature and that the present disclosure can be embodied in various forms. In addition, it needs to be pointed out that only parts related to the present disclosure are shown in the drawings for the convenience of description.

[0038] It needs to be pointed out that the embodiments and features in the embodiments in the present disclosure can be combined with each other without conflict. The technical solutions of the present disclosure will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0039] Unless otherwise specified, the exemplary embodiments / instances shown will be understood as providing exemplary features of various details that can implement the technical concepts of the present disclosure in practice. Therefore, unless otherwise specified, the features of various embodiments / instances can be additionally combined, separated, interchanged and / or rearranged without departing from the technical concepts of the present disclosure.

[0040] In the drawings, cross-hatching and / or shading are generally used to indicate that a portion of one component is positioned above another component. As such, unless otherwise specified, the presence of cross-hatching or shading is not a requirement of the present disclosure. In addition, for clarity and / or descriptive purposes, the sizes of components shown in the drawings can be exaggerated relative to other components. When the exemplary embodiments can be carried out in other ways, a specific process sequence can be performed in a different order from the described order. For example, two consecutively described processes can be performed substantially simultaneously or in an order opposite to the described order. In addition, the same reference numerals represent the same components.

[0041] When a component is referred to as being “on” or “above” another component, “connected to” or “combined to” another component, the component can be directly on, directly connected to or directly combined to the other component, or there can be an intermediate component. However, when a component is referred to as being “directly on” another component, “directly connected to” or “directly combined to” another component, there is no intermediate component. For this reason, the term “connected” can refer to a physical connection, an electrical connection, etc., with or without an intermediate component.

[0042] For descriptive purposes, the disclosure can use spatially relative terms, such as "below," "lower," "under," "downward," "down," "upper" "above," "upward," "higher," and "side" (e.g., as in "sidewall") to describe the relative position of one component to another as illustrated in the figures. The spatially relative terms are intended to encompass different orientations of the device in use, operation, and / or manufacture in addition to the orientations depicted in the figures. For example, if a device in the figures is turned over, elements described as "below" or "under" other elements or features would then be oriented "above" the other elements or features. Thus, the example term "below" can encompass both an orientation of above and below. The device can be otherwise oriented (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0043] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, to the extent that the terms "including," "includes," "having," "has," "with," or "contains," "containing," or variants thereof to be limited to an inclusion of only a portion of what is described, those terms and variants thereof are intended to be interpreted as specifying the inclusion of the stated features, integers, steps, operations, components, members, elements, or the like, but do not preclude the inclusion of one or more other features, integers, steps, operations, components, members, elements, or groups thereof. It also is noted that, as used herein, the terms "substantially," "approximately," and other synonyms thereof, are used to describe

[0044] According to one embodiment of the disclosure, a battery safety detection device is provided. The battery safety detection device can measure the water content near the battery and can also measure the deformation of the battery.

[0045] According to one embodiment of the disclosure, a battery safety detection device is provided. Figure 1 A schematic diagram of a battery safety detection device according to one embodiment of the disclosure is shown. The battery safety detection device 10 is used to measure the shape change of the battery and / or the change in the water content of the environment in which the battery is located, and the battery safety detection device 10 can include a detection electrode plate 100 and a signal processing device 200.

[0046] The detection electrode plate 100 is disposed in the vicinity of the battery 20, and when the battery 20 changes in shape and / or the moisture content of the environment surrounding the battery 20 changes, the induced capacitance of the detection electrode plate 100 with respect to a reference ground changes. The reference ground can be the ground of the battery container, the ground of the battery pack, the reference ground of the processing circuit, or the ground of the chip, as described below.

[0047] The signal processing device 200 is connected to the detection electrode plate 100, and obtains the changed induced capacitance from the detection electrode plate 100, thereby measuring the shape change of the battery 20 and / or the change in moisture content of the environment in which the battery 20 is located, based on the changed induced capacitance.

[0048] The battery 20 is housed in the battery container 30, and the detection electrode plate 100 is disposed at at least one portion of the battery container 30.

[0049] In addition, the detection electrode plate 100 can also be disposed inside, on the inner surface, on the outer surface of the battery container 30, or at a predetermined space from the outer surface of the battery container 30. The battery container can be a battery pack that houses a plurality of batteries.

[0050] In Figure 1 , a case including one detection electrode plate is shown, and in addition, the detection electrode plate can also be provided with a plurality of detection electrode plates, for example Figure 2 , as shown. In the present disclosure, preferably, one or more detection electrode plates can be disposed in the vicinity of the middle portion of the battery, in order to better detect the deformation of the battery.

[0051] As shown in Figure 3 and Figure 4 , the detection electrode plate includes two or more electrode plate units 110, and the two or more electrode plate units are disposed at a predetermined distance apart, and the signal processing device measures the shape change of the battery and / or the change in moisture content of the environment in which the battery is located, by detecting the induced capacitance between each of the two or more electrode plate units and the reference ground.

[0052] The signal processing device also measures the shape change of the battery and / or the change in moisture content of the environment in which the battery is located, by detecting the induced capacitance between each of the two or more electrode plate units and the adjacent electrode plate unit.

[0053] As shown in Figure 3 , the two or more electrode plate units are in the shape of a strip, and are distributed on the detection electrode plate in a first direction. There is an induced capacitance between each electrode plate unit 110 and the reference ground, and there is also an induced capacitance between each adjacent electrode plate unit 110.

[0054] The two or more electrode plate units are in one of the shapes of a circle, an ellipse, a triangle, and a polygon, and the two or more electrode plate units are respectively at a plurality of positions on the detection electrode plate. As shown in Figure 4As shown, the shape of the plate unit is circular, there is an induced capacitance between each plate unit 110 and the reference ground, and there is also an induced capacitance between each adjacent plate unit 110.

[0055] In various embodiments or examples of the present disclosure, when the water content of the battery unit changes, the dielectric constant between the plates changes due to the change in the water content, and accordingly the induced capacitance value between the plates changes. This can effectively measure the change in the water content by the capacitive sensing device of the present disclosure. When the water content is too high, an alarm process or the like can be performed. In addition, when the water content changes, the dielectric constant caused by the water in the battery pack will change uniformly, that is, the change in the dielectric constant caused by the water in the battery pack is consistent throughout the battery pack.

[0056] When the battery deforms, the induced capacitance between the detection plate 100 / plate unit 110 and the reference ground changes. If there are multiple plate units 110 for detection, the influence of the deformation of the battery on the plate units 110 arranged at different positions is different, and therefore the change in the induced capacitance of the plate units 110 at different positions is also different.

[0057] The signal processing device compares the induced capacitance obtained by each plate unit, and determines the shape change of the battery or the change in the water content according to the comparison result.

[0058] In the present disclosure, the shape change of the battery includes the deformation position, the deformation amount, the deformation range, and / or the deformation type.

[0059] When the change rate or change value of the induced capacitance of each plate unit is inconsistent, it is considered that the change in the induced capacitance is caused by the shape change of the battery, and when the change rate or change value of the induced capacitance of each plate unit is consistent, it is considered that the change in the induced capacitance is caused by the change in the water content. In the present disclosure, the change rate of the induced capacitance, that is, the proportion of the change in the induced capacitance at the later time relative to the induced capacitance at the earlier time, is preferably used as a measurement parameter. In this way, the influence of the shape, size, and the like of the plate unit on the measurement result can be effectively avoided.

[0060] The change rate or change value of the induced capacitance of each plate unit is inconsistent, that is, the change rate or change value of the induced capacitance of one or more plate units among two or more plate units is different from the change rate or change value of the induced capacitance of the other plate units.

[0061] When the change rate or change value of the induced capacitance of one or more plate units among the plate units exceeds a predetermined threshold value, it is considered that the battery has failed.

[0062] The number of the batteries is plural, and the detection electrode plate is arranged between the batteries, on the inner surface of the battery pack containing the batteries, on the outer surface of the battery pack, or is arranged at a predetermined space from the outer surface of the battery pack.

[0063] For example, if the detection electrode plate is arranged on both sides of a battery, the two detection electrode plates on both sides can detect the battery from different angle directions, for example, as in the case of a strip-shaped detection electrode plate, the arrangement direction of the strip-shaped electrode plates of the detection electrode plates on both sides can be at an angle, for example, can be 90 degrees.

[0064] The number of the detection electrode plates is two or more. In the present disclosure, it can be set according to actual needs, and is not limited.

[0065] Figure 5 A battery safety detection device in a battery pack according to the first aspect of the present disclosure is shown.

[0066] As shown in Figure 5 , the battery pack can include two or more battery units. Figure 5 Three battery units 621, 622 and 623 are shown, it should be noted that other numbers of battery units can also be used. In the following, three battery units are taken as an example for description, and the principle is the same when other numbers of battery units are used.

[0067] The three battery units 621, 622 and 623 are arranged at a predetermined space.

[0068] The battery safety detection device can include a capacitive sensing device and a processing device.

[0069] The capacitive sensing device can include a first electrode plate 601 and a second electrode plate 602, the first electrode plate is arranged on, near or inside the outer surface of one of the adjacent battery units, and the second electrode plate is arranged on, near or inside the outer surface of the other of the adjacent battery units, wherein the first electrode plate and the second electrode plate are arranged in a predetermined space and are oppositely arranged. The first electrode plate and the second electrode plate are arranged between each two adjacent battery units of the two or more battery units.

[0070] As shown in Figure 5 , the first electrode plate can be arranged on the outer surface of the first battery 621, and the second electrode plate is correspondingly arranged on the outer surface of the second battery 622, the first electrode plate is arranged on the outer surface of the other side of the second battery, and the second electrode plate is correspondingly arranged on the outer surface of the third battery 623.

[0071] The signal processing device processes the output signal of the first electrode plate and / or the second electrode plate to obtain the change of the capacitance between the first electrode plate and the second electrode plate caused by the moisture around the battery unit and / or the deformation of the battery unit.

[0072] In addition, the signal processing device processes the output signal of the first electrode plate and / or the second electrode plate, and can obtain the change in the capacitance between the first electrode plate and the second electrode plate caused by the change in the distance between the first electrode plate and the second electrode plate due to the deformation of the battery cell. When the battery cell deforms, the corresponding electrode plate deforms, and thus the distance between the electrode plates changes, which causes the generated capacitance between the electrode plates to change correspondingly. Since the shape of the electrode plate is not regular, if there are multiple pairs of electrode plates for detection, the change rate or the change value of the capacitance formed by each pair of electrode plates will be different.

[0073] Figure 6 A schematic diagram of a battery pack containing moisture is shown. Figure 7 A schematic diagram of a deformed battery is shown, in which Figure 7 The deformation shown is a bulging deformation of the battery cell.

[0074] In the battery pack of the present disclosure, the change in the moisture content in the battery pack will cause the capacitance value between the first electrode plate and the second electrode plate to change. Since the battery cell deforms, the first electrode plate and the second electrode plate will deform. When the first electrode plate and the second electrode plate deform, the electrostatic capacitance value between the first electrode plate and the second electrode plate will also change. Therefore, the change in the moisture content in the battery pack and / or the deformation of the battery cell can be obtained by measuring the change in the capacitance value.

[0075] According to a further embodiment of the present disclosure, the number of first electrode plates and second electrode plates arranged on one outer surface of the battery can be two or more. The two or more first electrode plates and the two or more second electrode plates are arranged one-to-one and constitute two or more capacitive sensing units, and the signal processing device obtains the change in the unit capacitance formed by each of the two or more capacitive sensing units.

[0076] Figure 8 A case where multiple first electrode plates and second electrode plates are arranged is shown. The number of first electrode plates and second electrode plates can be set according to actual conditions, and the shapes thereof can be square, rectangular, circular, trapezoidal, rhombic, triangular, T-shaped, interdigital, polygonal, etc., which are not limited in the present disclosure. In other embodiments, the shapes of the electrode plates can also be the shapes described above or any other arbitrary shape.

[0077] By setting multiple first and second electrode plates, taking the first and second battery cells as an example, multiple first electrode plates are arranged on the outer surface of the first battery cell, and correspondingly, multiple second electrode plates are arranged on the outer surface of the second battery cell. When the size and shape of each pair of first and second electrode plates are the same, when the water content in the battery pack changes, the change in the capacitance value detected by each pair of first and second electrode plates is the same (because the change in the dielectric constant caused by the water content in the battery pack is uniform), but when the size and / or shape of each pair of first and second electrode plates are the same, when the water content in the battery pack changes, the change in the capacitance value detected by each pair of first and second electrode plates is different, at this time, the change caused by the water content can be obtained by calculating the change rate of the capacitance value of each pair of first and second electrode plates, for example, the capacitance value change rate between the previous moment and the next moment.

[0078] When the first and / or second battery cell where a certain first and second electrode plate is located deforms, the static capacitance value generated by the first and second electrode plate will change, so by detecting the static capacitance value, the deformation of the first and / or second battery cell can be obtained. Because different first and second electrode plates are arranged at different positions, the static capacitance values generated by each corresponding first and second electrode plate can be different. For example, when a bulging failure occurs, the static capacitance of the first and second electrode plates at the bulging position changes greatly, while the static capacitance of the first and second electrode plates at the non-bulging position changes less. In this way, the deformed position, the deformed range, and the deformed type and amount can be obtained according to the arrangement position of the first and second electrode plates.

[0079] Preferably, the first electrode plate and the second electrode plate are arranged in parallel.

[0080] For example, the signal processing device of the present disclosure can also include a comparison unit for comparing the capacitance change value and / or change rate of each unit (a unit composed of each corresponding first and second electrode plate), and judging the change of the water content in the battery pack according to the comparison result. The comparison unit can also judge the deformed position, deformed amount, deformed range and / or deformed type of the battery according to the capacitance change value and / or change rate.

[0081] In addition, it can also be judged according to the capacitance change value and / or change rate whether the capacitance change is caused by the change of the water content or by the deformation of the battery cell. For example, when a bulging failure occurs, Figure 7When the bulging failure occurs in the illustrated shape, the change value and / or change rate of the electrostatic capacitance of the middle two first and second plates will be obviously different from the change value and / or change rate of the electrostatic capacitance of the two side first and second plates. Thus, by detecting the change value and / or change rate of the electrostatic capacitance of each detection unit formed by each first and second plate, the position where the deformation occurs can be obtained, and the type of deformation can also be obtained from the position of deformation. For example, when the water content changes, the change value and / or change rate of the electrostatic capacitance of each unit is generally consistent / equal, so at this time it can be considered that the change in capacitance is caused by the change in water content.

[0082] In one embodiment of the present disclosure, the electrically conductive body used for the outer packaging of each battery cell can be used as the first and second plates. For example, the battery cell is usually wrapped with an aluminum foil, and the aluminum foil used for wrapping can be used as the first and second plates. An insulating layer or the like can also be provided between the aluminum foil and the battery body.

[0083] According to another embodiment of the present disclosure, the first and / or second plate is an electrically conductive body or electrically conductive material provided on or near the outer surface of one battery cell and / or on or near the outer surface of another battery cell, and can also be provided on or near the inner surface. For example, the electrically conductive body can be provided separately as the first and second plates, or an electrically conductive material (e.g., coated with an electrically conductive material) can be provided to achieve the functions of the first and second plates, etc.

[0084] The battery safety detection device can also include an application device for applying an excitation to the first and / or second plate. In addition, a threshold comparison unit can be included, which determines that the battery has failed (e.g., excessive water content or excessive deformation) when the change value and / or change rate of the capacitance exceeds a predetermined threshold.

[0085] Figure 9 A plurality of first plates 6011 and second plates 6021 are shown, which are in the shape of strips and are arranged in a cross pattern. The first plates can be used as transmitting plates, and the second plates can be used as receiving plates, or vice versa. After the first plates are sequentially excited, the induced capacitance obtained from each excited first plate is measured by each second plate.

[0086] Figure 10 A plurality of first plates 6011 and second plates 6021 are shown, which are in the shape of rectangles and are arranged in a corresponding pattern. The first plates can be used as transmitting plates, and the second plates can be used as receiving plates, or vice versa. After the first plates are sequentially excited, the induced capacitance obtained from each excited first plate is measured by the adjacent second plate.

[0087] Figure 11The second electrode plate 602 is shown, and the first electrode plates 6011 are shown in correspondence. The first electrode plates can be used as emitter plates, and the second electrode plate can be used as a receiver plate, or vice versa. After each first electrode plate is sequentially excited, the induced capacitance between the first electrode plate and the second electrode plate is measured, or vice versa.

[0088] In addition, in the above example, the induced capacitance between two electrode plates is measured, but in the present disclosure, the induced capacitance between multiple electrode plate units arranged on one electrode plate can also be measured. For example Figure 12 The multiple electrode plate units include emitter electrodes 131 and receiver electrodes 132, and the emitter electrodes 131 and the receiver electrodes 132 are arranged alternately. When the emitter electrodes 131 are excited, the induced capacitance between the emitter electrodes 131 and the adjacent receiver electrodes 132 is measured.

[0089] According to another aspect of the present disclosure, a battery management system is also provided, which includes the battery safety detection device as described above, and the water content and / or deformation of the battery cells in the battery pack are measured by the battery safety detection device.

[0090] According to a second aspect of the present disclosure, a battery safety detection device in a battery pack is provided, the battery pack including two or more battery cells arranged with a predetermined space, the battery safety detection device including: a capacitance sensing device including a first electrode plate array and a second electrode plate array; and a signal processing device processing an output signal of the first electrode plate array and / or the second electrode plate array to obtain a change in capacitance between the first electrode plate array and the second electrode plate array generated when the water content in the battery pack changes, wherein the first electrode plate array includes two or more first electrode plates and the second electrode plate array includes two or more second electrode plates, the extension direction of the two or more first electrode plates and the extension direction of the two or more second electrode plates form a predetermined angle, the first electrode plate array is arranged on, near or inside an outer surface of one of the adjacent battery cells, and the second electrode plate array is arranged on, near or inside an outer surface of another of the adjacent battery cells, wherein the first electrode plate array and the second electrode plate array are arranged in the predetermined space and are arranged opposite to each other. The predetermined angle can be 90 degrees.

[0091] The first electrode plate array and the second electrode plate array are arranged between every two adjacent battery cells of the two or more battery cells. The first electrode plate array and the second electrode plate array can be arranged in parallel.

[0092] The following is described by taking two battery cells as an example. Figure 9 The arrangement of the first electrode plate and the second electrode plate of the first battery cell and the second battery cell is shown.

[0093] AsFigure 9 As shown, the first electrode plate 6011 arranged in the first electrode plate array of the first battery cell can extend along the first direction, and a plurality of the first electrode plates can be arranged in parallel, the second electrode plate 6021 arranged in the second electrode plate array of the second battery cell can extend along the second direction, and a plurality of the second electrode plates can also be arranged in parallel. In this way, when the first electrode plate and the second electrode plate are oppositely arranged, the change of the water content of the battery pack and / or the deformation of the battery cell can be sensed by the capacitance value generated between the first electrode plate and the second electrode plate. It should be noted that, although the first electrode plate and the second electrode plate are arranged in a long strip shape in the above embodiment, other shapes are also possible, which are not limited in the present disclosure. Figure 5 It should be noted that, although the first electrode plate and the second electrode plate are arranged in a long strip shape in the above embodiment, other shapes are also possible, which are not limited in the present disclosure.

[0094] The battery safety detection device can further include an application device for applying excitation to one or more than one of the two or more first electrode plates and / or applying excitation to one or more than one of the two or more second electrode plates in time.

[0095] For example, an excitation voltage is applied to one first electrode plate at a first time, and then the electrostatic capacitance value between the first electrode plate and the second electrode plate is measured. Then, an excitation voltage is applied to another first electrode plate, and the electrostatic capacitance value between the first electrode plate and the second electrode plate is measured, and so on.

[0096] In this way, the electrostatic capacitance value between the first electrode plate and the second electrode plate after the excitation voltage is applied to each first electrode plate can be finally obtained.

[0097] The signal processing device obtains the capacitance change measured based on each first electrode plate and / or second electrode plate after the excitation is applied to the first electrode plate and / or second electrode plate at one time and other times, and compares the capacitance change value and / or change rate, and determines the change of the water content of the battery, and / or the deformation position, deformation amount, deformation range and / or deformation type of the battery cell according to the comparison result.

[0098] For example, when the water content in the battery pack changes, the change value and / or change rate of the electrostatic capacitance measured by each electrode plate is generally consistent / equal, so at this time the change can be considered to be caused by the change of the water content. When a deformation such as a bulging fault occurs, as shown in the shape of the bulging fault, the change value and / or change rate of the electrostatic capacitance of the first electrode plate and the second electrode plate at the bulging position will be greater than the change value and / or change rate of the electrostatic capacitance of the two first electrode plates and the second electrode plate on both sides, so that by detecting the change value and / or change rate of the electrostatic capacitance of the detection unit composed of each first electrode plate and second electrode plate, the position where the deformation occurs can be obtained, and the deformation type and the like can also be obtained through the deformation position. Figure 7 For example, an excitation voltage is applied to one first electrode plate at a first time, and then the electrostatic capacitance value between the first electrode plate and the second electrode plate is measured. Then, an excitation voltage is applied to another first electrode plate, and the electrostatic capacitance value between the first electrode plate and the second electrode plate is measured, and so on.

[0099] In one embodiment of the present disclosure, a conductive body for wrapping each battery cell can be used as the first and second electrode plates. For example, a battery cell is usually wrapped with an aluminum foil, and the aluminum foil used for wrapping can be used as the first and second electrode plates. An insulating layer or the like can also be provided between the aluminum foil and the battery body. In this case, the aluminum foil used for wrapping can be processed to form the first and second electrode plates.

[0100] According to another embodiment of the present disclosure, the first and / or second electrode plates are conductive bodies or conductive materials provided on or near the outer surface of one battery cell and / or on or near the outer surface of another battery cell, and can also be provided on or near the inner surface. For example, a conductive body can be provided separately as the first and second electrode plates, or a conductive material (e.g., a conductive material applied) can be provided to perform the functions of the first and second electrode plates.

[0101] In addition, when the capacitance change exceeds a predetermined threshold, it is determined that the battery has a problem of excessive water content or excessive deformation. For example, as described above, the capacitance sensing device according to the present disclosure can effectively distinguish between changes in water content and changes in shape, so that after distinguishing, it can be determined whether the battery has a problem of excessive water content or a problem of deformation.

[0102] According to a further embodiment of the present disclosure, a battery management system is also provided, which includes the battery safety detection device as described above, and measures the water content and / or deformation of the battery cells in the battery pack by the battery safety detection device.

[0103] According to a third aspect of the present disclosure, a battery safety detection device in a battery pack is provided, the battery pack including two or more battery cells arranged with a predetermined space therebetween, the battery safety detection device including: a capacitance sensing device including a first electrode plate, a second electrode plate, and an intermediate electrode plate; and a signal processing device processing an output signal of the first electrode plate, the second electrode plate, and / or the intermediate electrode plate to obtain a capacitance change between the first electrode plate and the intermediate electrode plate, and / or between the second electrode plate and the intermediate electrode plate, generated when a change in water content inside the battery pack and / or a deformation of the battery cells causes a distance between the first electrode plate and the intermediate electrode plate, and / or between the second electrode plate and the intermediate electrode plate to change, the first electrode plate being provided on, near, or inside an outer surface of one of the adjacent battery cells, the second electrode plate being provided on, near, or inside an outer surface of another of the adjacent battery cells, the intermediate electrode plate being located between the first electrode plate and the second electrode plate, and the intermediate electrode plate being provided opposite to the first electrode plate and the second electrode plate in the predetermined space.

[0104] The first electrode plate 601, the second electrode plate 602, and the intermediate electrode plate 603 are provided between each two adjacent battery cells of the two or more battery cells.

[0105] like Figure 13 As shown, an intermediate plate is disposed between the first and second plates. The change in capacitance between the intermediate plate and the first plate indicates the change in water content inside the battery pack and / or the deformation of the first battery cell. Similarly, the change in capacitance between the intermediate plate and the second plate indicates the change in water content inside the battery pack and / or the deformation of the second battery cell. The principle is the same for other battery cells and will not be elaborated further.

[0106] In one embodiment of this disclosure, a conductor used for the outer packaging of each battery cell can be used as the first and second electrode plates. For example, since the battery cell is typically wrapped in aluminum foil, the aluminum foil used for wrapping can be used as the first and second electrode plates. An insulating layer can also be provided between the aluminum foil and the battery body. In this case, the aluminum foil used for packaging can be processed to form each first and second electrode plate.

[0107] According to another embodiment of this disclosure, the first electrode plate and / or the second electrode plate are respectively disposed on or near the outer surface of one battery cell and / or on or near the outer surface of another battery cell. Alternatively, they may be disposed on or near the inner surface. For example, a conductor can be disposed separately as the first electrode plate and the second electrode plate, or a conductive material can be disposed to achieve the functions of the first electrode plate and the second electrode plate, etc.

[0108] The intermediate electrode plate can be a single conductor, or conductors / conductive materials can be disposed on both sides of the intermediate electrode plate. When it is a single conductor, the change in water content inside the battery pack and / or the deformation of the first and second battery cells can be obtained by detecting the capacitance change between the intermediate electrode plate and the first electrode plate, and the capacitance change between the intermediate electrode plate and the second electrode plate, respectively. When conductors / conductive materials are disposed on both sides of the intermediate electrode plate, the change in water content inside the battery pack and / or the deformation of the first battery cell can be measured by the conductors / conductive materials on the opposite side of the intermediate electrode plate corresponding to the first electrode plate, and the change in water content inside the battery pack and / or the deformation of the second battery cell can be measured by the conductors / conductive materials on the opposite side of the intermediate electrode plate corresponding to the second electrode plate. When conductors or conductive materials are disposed on both sides of the intermediate electrode plate, the conductors or conductive materials on both sides are insulated.

[0109] Similar to the above embodiments, the number of the first electrode plates, the second electrode plates and the intermediate electrode plates are both more than two, and the two or more first electrode plates are arranged one-to-one with the two or more intermediate electrode plates and constitute two or more first capacitive sensing units, and the two or more second electrode plates are arranged one-to-one with the two or more intermediate electrode plates and constitute two or more second capacitive sensing units, and the signal processing device respectively acquires the cell capacitance change value and / or the change rate formed by the two or more first capacitive sensing units and the two or more second capacitive sensing units.

[0110] The signal processing device comprises a comparison unit for comparing the respective cell capacitance change value and / or the change rate, and judging the change of the water content inside the battery pack and / or the deformation position, deformation amount, deformation range and / or deformation type of the battery according to the comparison result.

[0111] Similarly, the first electrode plate and / or the second electrode plate is an electrically conductive body for packaging one battery cell and / or an electrically conductive body for packaging another battery cell, and the intermediate electrode plate is an electrically conductive body or an electrically conductive material arranged between the first electrode plate and the second electrode plate. Alternatively, the first electrode plate and / or the second electrode plate is an electrically conductive body or an electrically conductive material arranged near the outer surface of one battery cell and / or arranged near the outer surface of another battery cell, and the intermediate electrode plate is an electrically conductive body or an electrically conductive material arranged between the first electrode plate and the second electrode plate.

[0112] The first electrode plate, the second electrode plate and the intermediate electrode plate are arranged in parallel.

[0113] Further comprising an applying device for applying excitation to the first electrode plate, the second electrode plate and / or the intermediate electrode plate. When the capacitance change exceeds a predetermined threshold value, it is judged that the battery has excessive water content or excessive deformation.

[0114] According to a further embodiment of the present disclosure, a battery management system is also provided, comprising the above battery safety detection device, and the deformation of the battery cell in the battery pack and the water content inside the battery pack are measured by the battery safety detection device.

[0115] According to a fourth aspect of the present disclosure, a battery safety detection device in a battery pack is provided, the battery pack comprising two or more battery cells arranged with a predetermined space, the battery safety detection device comprising: a capacitive sensing device comprising a first electrode plate array, a second electrode plate array and a middle electrode plate array; and a signal processing device processing output signals of the first electrode plate array, the second electrode plate array and / or the middle electrode plate array to obtain a capacitive change generated by a change in water content inside the battery pack and / or a capacitive change generated by a change in distance between the first electrode plate array and the middle electrode plate array and / or between the second electrode plate array and the middle electrode plate array caused by a deformation of the battery cells, wherein the first electrode plate array comprises two or more first electrode plates, the second electrode plate array comprises two or more second electrode plates and the middle electrode plate array comprises two or more middle electrode plates, an extension direction of the two or more first electrode plates forms a predetermined angle with an extension direction of the two or more middle electrode plates, an extension direction of the two or more second electrode plates forms a predetermined angle with the extension direction of the two or more middle electrode plates, the first electrode plate array is arranged on or near an outer surface or an inner surface of one of the adjacent battery cells, the second electrode plate array is arranged on or near an outer surface or an inner surface of the other of the adjacent battery cells, and the middle electrode plate array is arranged between the first electrode plate array and the second electrode plate array, wherein the first electrode plate array, the second electrode plate array and the middle electrode plate array are arranged in the predetermined space and are arranged oppositely.

[0116] The first electrode plate array, the second electrode plate array and the middle electrode plate array are arranged in parallel. The predetermined angle is 90 degrees.

[0117] The middle electrode plate array is provided with a conductive body or a conductive material on both sides, and the conductive bodies or the conductive materials on both sides are insulated.

[0118] The device further comprises an applying device for applying excitation to one or more of the two or more first electrode plates, to one or more of the two or more second electrode plates and / or to one or more of the two or more middle electrode plates at different times.

[0119] The signal processing device obtains a capacitive change value and / or a capacitive change rate measured based on each of the first electrode plate, the second electrode plate and / or the middle electrode plate after excitation is applied to the first electrode plate, the second electrode plate and / or the middle electrode plate at one time and at other times, and compares the capacitive change values and / or the capacitive change rates, and determines a change in water content inside the battery pack and / or a deformation position, a deformation amount, a deformation range and / or a deformation type of the battery cells according to a comparison result.

[0120] The first and / or second electrode plates are conductive bodies or conductive materials arranged near the outer surface of one battery cell and / or near the outer surface of another battery cell, respectively.

[0121] When the capacitance change exceeds a predetermined threshold, it is determined that the battery has excessive water content or excessive deformation.

[0122] When the capacitance change value and / or the capacitance change rate between each first electrode plate and each intermediate electrode plate, and / or the capacitance change value and / or the capacitance change rate between each second electrode plate and each intermediate electrode plate are consistent, it is considered that the internal water content of the battery pack changes, and when the capacitance change value and / or the capacitance change rate between each first electrode plate and each intermediate electrode plate, and / or the capacitance change value and / or the capacitance change rate between each second electrode plate and each intermediate electrode plate are inconsistent, it is considered that the battery cell has shape change.

[0123] The technical solution of the fourth aspect of the present disclosure is different from the example of Figure 5 The difference is that the intermediate electrode plate array is further included, and the intermediate electrode plate can include a plurality of strip-shaped intermediate electrode plates.

[0124] For example, the plurality of first electrode plates can extend in parallel along a first direction, the plurality of second electrode plates can also extend in parallel along the first direction, and the plurality of intermediate electrode plates can extend along a second direction at an angle to the first direction, for example, the angle can be 90 degrees, wherein the intermediate electrode plates can also be arranged on both sides to correspond to the first electrode plates and the second electrode plates, respectively. The measurement method can also be similar to the technical solution of the second aspect, which will not be described here.

[0125] According to a further embodiment of the present disclosure, a battery management system is provided, which includes the battery safety detection device as above, and the deformation of the battery cell in the battery pack and / or the water content inside the battery plate are measured by the battery safety detection device.

[0126] The signal processing device can include an application unit, which can provide a square wave voltage, a step wave voltage, etc. at a predetermined hertz, and the sampling unit can receive signals from the electrode plates, and the received signals are provided to the analog-to-digital conversion unit, and after conversion by the analog-to-digital conversion unit, they can be provided to the filtering unit, etc. In this way, the corresponding capacitance change value can be measured. In addition, when the signal processing device is used to process multiple electrode plates, a multiplexing unit can be provided before the sampling unit, for example, a multiplexer can be used to select the signals of each electrode plate.

[0127] The application unit can apply an excitation to the electrode plate, and in the case where the excitation needs to be applied to multiple electrode plates respectively, the application unit can selectively apply the excitation to the electrode plate through a multiplexing unit. After the excitation is applied, the capacitance value generated by the electrode plate can be sampled by a sampling unit (in the case where multiple electrode plates are sampled respectively, each electrode plate can be selected by the multiplexing unit to be sampled), and the capacitance value collected by the sampling unit is sent to an analog-to-digital conversion unit, which can convert the collected capacitance value into a digital signal, and then filter the signal through a filtering unit. The filtering unit can include a linear filter, a nonlinear filter, or a combination of a linear filter and a nonlinear filter. The filtered signal is sent to a calculation unit, which calculates the capacitance change value and / or the capacitance change rate generated by the electrode plate. The calculated capacitance change value and / or the capacitance change rate are sent to a judgment unit, which judges according to the capacitance change value and / or the capacitance change rate, for example, it can judge whether the capacitance change is caused by the change of water content or the deformation of the battery, and in addition, the judgment unit can also judge whether a fault occurs to alarm, etc.

[0128] In the preferred embodiments of the present disclosure, in the case where a plurality of first electrode plates are included, an insulating material or an insulating component can be provided between the plurality of first electrode plates to prevent short circuit between the first electrode plates when the battery cell deforms. In addition, similarly, in the case where a plurality of second electrode plates / intermediate electrode plates are included, each second electrode plate / intermediate electrode plate can also be provided with an insulating material or an insulating component to prevent short circuit after deformation. In addition, an insulating material or an insulating component can also be provided between the first electrode plate and the second electrode plate, between the first electrode plate and the intermediate electrode plate, and / or between the second electrode plate and the intermediate electrode plate. In the above-mentioned provision of the insulating material or the insulating component, the insulating material or the insulating component can be provided between two electrode plates, or the surface of each electrode plate can be wrapped by the insulating material or the insulating component.

[0129] In addition, in the above embodiments / examples, the first electrode plate / second electrode plate is described as being arranged on the outer surface of the battery cell, but the first electrode plate / second electrode plate can also be arranged inside the outer surface of the battery cell, for example, it can be arranged inside the outer packaging of the battery cell, etc.

[0130] In the above description, the water content can be measured according to the capacitance change value and / or change rate, and the deformation position, deformation amount, deformation range and / or deformation type of the battery can also be determined. For example, in the case where a plurality of first, second or intermediate plates are provided, the range of deformation can be determined by the signals of the plates provided at different positions, for example, when the signals of the plates at certain positions change, the range of deformation can be determined. In addition, the determination of the area of deformation can also be made in the same way. In addition, the deformation amount of the battery cell can also be obtained according to the size of the capacitance change,

[0131] In addition, according to the deformation embodiment of the present disclosure, when the number of first, second and intermediate plates is more than one, they can be arranged to detect the change in water content and / or deformation.

[0132] For example, when there are more than one first and second plates, the number of first plates can be set to M, M≥1, and the number of second plates can be set to N, N≥2, wherein each of the M first plates respectively interacts with each of the N second plates to measure the corresponding capacitance change. For example, when there are 2 first plates and 3 second plates as receiving electrodes, one of the 2 first plates is excited, and the induced capacitance at the 3 second plates is measured respectively, and then the other first plate is excited, and the induced capacitance at the 3 second plates is measured respectively. The same principle applies to the case where there are more than one first, second and intermediate plates. For example, the number of first plates can be set to M, M≥2, the number of second plates can be set to N, N≥2, and the number of intermediate plates can be set to m, wherein m≥1, wherein each of the m intermediate plates respectively interacts with each of the M first plates and each of the N second plates to measure the corresponding capacitance change.

[0133] In addition, when the intermediate plate is provided with plates on both sides, the middle part of the intermediate plate between the two plates can be provided with an electric field insulation.

[0134] According to another embodiment, as Figure 14 As shown, the signal processing device according to the present disclosure can include a collection control unit, a detection capacitance, a reverse charging unit, a comparison unit, a detection unit, a calculation unit and an excitation signal providing unit.

[0135] In addition, a multiplexing unit can also be included, in the case of collecting the induced voltages of a plurality of plates, the plate corresponding to one of the induced voltages can be selected by the multiplexing unit, and the excitation signal can be provided by the excitation signal providing unit, and then the collection control can be performed by the collection control unit.

[0136] The collection control unit can include a sensing charge release unit that releases the charge of the plate by connecting the plate to a reset voltage, such as ground.

[0137] When collecting the plate corresponding to the sensing voltage, the excitation signal providing unit applies an excitation signal to the corresponding plate, and the collection control unit transfers the sensing charge of the corresponding plate to the detection capacitor. In addition, a reset switch can also be connected to both ends of the detection capacitor to discharge the detection capacitor and reset it. The reset voltage of the detection capacitor can be the same as the reset voltage of the corresponding plate.

[0138] The comparison unit can include an operational amplifier, and the positive input terminal of the operational amplifier can be connected to the detection capacitor, and the negative input terminal can be connected to a threshold voltage. By comparing the voltage generated by the charge of the detection capacitor and the threshold voltage, the comparison unit outputs a comparison signal.

[0139] Alternatively, the negative input terminal can be connected to the output terminal of the operational amplifier, so that when the charge of the detection capacitor causes a change in voltage, the output voltage of the comparison unit will change.

[0140] After the collection of the sensing capacitor by the detection capacitor is completed, the reverse charging unit provides a first charge to the detection capacitor, and the polarity of the first charge is opposite to the polarity of the charge injected into the detection capacitor by the sensing capacitor. Thus, as the first charge providing time continues, the output voltage of the comparison unit gradually approaches the reset voltage. The output voltage of the comparison unit is compared with a preset voltage in the detection unit, and the preset voltage can be equal to the reset voltage. When the output voltage of the comparison unit is less than the preset voltage, the output signal of the comparison unit will change.

[0141] The calculation unit calculates the time from the initial time when the reverse charging unit provides the first charge, and calculates the time length between the initial time and the time when the output signal of the comparison unit changes. The size and change of the sensing capacitor are calculated by the time length.

[0142] The time length is proportional to the size of the sensing capacitor, so the change in the time length will reflect the change in the sensing capacitor. The value of the sensing capacitor is obtained by the time length.

[0143] As Figure 15 shown, according to further embodiments of the present disclosure, a battery management device is also provided, wherein the battery management device integrates the signal processing apparatus. According to further embodiments of the present disclosure, a battery management system is also provided, wherein the battery management system includes the signal processing apparatus.

[0144] In the battery management device or the battery management system, an overvoltage module can also be included, wherein the overvoltage module can calculate a discharge overvoltage threshold, a charge overvoltage threshold, etc. according to the detected deformation variable, and in the case of exceeding the threshold, etc., an alarm or other measures, etc. are taken.

[0145] An overcurrent module can also be included, wherein the overcurrent module can calculate a charge overcurrent threshold, a discharge overcurrent threshold, etc. according to the detected deformation variable, and in the case of exceeding the threshold, etc., an alarm or other measures, etc. are taken.

[0146] In this way, the protection parameters of the battery can be adjusted, and the working state of the battery can be ensured to be maintained within a normal range. In the case of excessive deformation of the battery, the thresholds are adjusted, thereby preventing faults, etc.

[0147] In addition, a power calculation unit can also be included. Due to the deformation of the battery, the corresponding battery model will change, such as a change in the model itself and a change in the related parameters. These changes need to be adjusted according to the battery deformation parameters in order to perform high-precision power calculation on the battery.

[0148] In the description of the present specification, the description of the terms "one embodiment / way", "some embodiments / ways", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment / way or example are included in at least one embodiment / way or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment / way or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments / ways or examples. In addition, different embodiments / ways or examples described in the present specification and the features of different embodiments / ways or examples can be combined and combined by those skilled in the art without contradiction.

[0149] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0150] Those skilled in the art should understand that the above embodiments are only for the purpose of clearly illustrating the present disclosure, and are not intended to limit the scope of the present disclosure. Based on the above disclosure, other changes or modifications can also be made by those skilled in the art, and these changes or modifications are still within the scope of the present disclosure.

Claims

1. A battery management device, characterized by, The application relates to a battery management device, comprising: a signal processing device for detecting a deformation amount of a capacitor plate, the signal processing device comprising: a collection control unit for collecting an induced voltage of a capacitor plate for sensing a shape change of a battery pack, the capacitor plate being arranged on a surface or outside of the battery pack and changing in shape along with a shape change of the battery pack, and when the capacitor plate changes in shape, the induced voltage generated by the capacitor plate will change accordingly; an excitation signal providing unit for providing an excitation signal to the capacitor plate, the capacitor plate generating an induced voltage according to the excitation signal; and a detection capacitor connected to the collection control unit, the detection capacitor being used for receiving a first charge from the capacitor plate to collect the induced voltage, after the detection capacitor completes the collection of the induced voltage, the detection capacitor is applied with a second charge opposite in polarity to the first charge, and the induced voltage is calculated according to a time length during which a detection voltage decreases to a threshold voltage, the time length being proportional to a size of the induced capacitor; the signal processing device calculates a capacitance change value and / or change rate of the capacitor plate according to the induced voltage, and calculates a deformation amount of the capacitor plate according to the capacitance change value and / or change rate; the battery management device further comprises: an overvoltage module for calculating and / or updating a discharge overvoltage threshold and / or a charging overvoltage threshold according to the deformation amount; the signal processing device further comprises: a reverse charging unit for providing the second charge to the detection capacitor after the detection capacitor completes the collection of the induced voltage; a comparison unit for receiving a voltage change value of the detection capacitor when the second charge is provided to the detection capacitor, and outputting a comparison signal according to the voltage change value; a detection unit for comparing the comparison signal with the threshold voltage, and changing an output signal of the detection unit when the comparison signal is lower than the threshold voltage; a calculation unit for calculating a time length between an initial time when the second charge is provided to the detection capacitor and a time when the output signal of the detection unit changes, and calculating a voltage value of the induced voltage according to the time length; an induced charge releasing unit for connecting the capacitor plate to a reset voltage so as to release a charge of the capacitor plate; a reset switch connected to the detection unit, the reset switch being capable of resetting a voltage of the detection unit to the reset voltage; the reset voltage is equal to the threshold voltage.

2. The battery management device of claim 1, wherein, The signal processing device further comprises a multiplexing unit for selecting a part of a plurality of capacitor plates so as to provide excitation signals to the part of capacitor plates by the excitation signal providing unit and collect induced voltages of the part of capacitor plates by the collection control unit and the detection capacitor.

3. The battery management device of claim 1, wherein, It further comprises an overcurrent module which calculates and / or updates at least a charge overcurrent threshold and / or a discharge overcurrent threshold as a function of the morphing variable.

4. The battery management device of claim 1, wherein, It further comprises a state of charge calculation unit which calculates or updates a state of charge calculation parameter and / or a state of charge calculation model as a function of the morphing variable.

5. A battery management system, characterized by, It comprises a battery management device as claimed in any one of claims 1 to 4.

Images