Bottom supporting piece and battery
By designing a bottom mount containing protective parts, chips and flow guide grooves in the battery, the problem of shortening battery service life and affecting safety performance caused by the reduction of electrolyte liquid level is solved, real-time monitoring of battery level height and prediction of service life is achieved, and the safety and management efficiency of battery use are improved.
Patent Information
- Application Number
- CN202420376506.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-28
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-02-28
AI Technical Summary
After a long period of use of existing batteries, the liquid level of the electrolyte is reduced, resulting in a shortened service life and a compromised safety performance, and it is difficult to monitor the electrolyte content and predict the service life.
A bottom bracket is designed, including a protective member, a chip and a flow guide groove. The chip detects the fluid pressure of the electrolyte in the placement hole opened on the protection member. The flow guide groove guides the electrolyte into the placement hole to achieve real-time monitoring of liquid level height.
By monitoring the liquid level height of the electrolyte in real time, the battery's service life can be analyzed and predicted, safety problems caused by low liquid level can be avoided, and safety of the battery can be improved.
Smart Images
Figure CN222581235U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of battery manufacturing, and in particular to a bottom support sheet and a battery. Background Art
[0002] After long-term use, the battery will cause the electrolyte to decrease, which in turn causes the electrolyte level in the battery to decrease. The decrease in the electrolyte level in the battery will not only affect the battery life, but may also cause lithium or sodium precipitation, resulting in an internal short circuit in the battery, greatly affecting the safety performance of the battery. At present, existing batteries need to be disassembled to check the electrolyte level, which is not convenient for monitoring the electrolyte content inside the battery, and it is also difficult to predict the battery life in advance. Utility Model Content
[0003] In order to overcome the deficiencies in the prior art, the present application provides a bottom support sheet and a battery.
[0004] This application provides the following technical solutions:
[0005] In a first aspect, the present application provides a bottom support sheet for use in a battery, the bottom support sheet comprising:
[0006] The protective member is provided with a placement hole; the protective member is also provided with at least one guide groove; the guide groove is connected with the placement hole;
[0007] A chip is arranged in the placement hole; the chip is used to detect the fluid pressure of the electrolyte in the battery.
[0008] In a possible implementation, the bottom support piece further includes a first insulating member and a second insulating member; the first insulating member is disposed on one side of the protective member; and the second insulating member is disposed on a side of the protective member away from the first insulating member.
[0009] In a possible implementation manner, the guide groove is opened on a side of the protection component away from the second insulating component.
[0010] In a possible embodiment, a first connecting layer is provided on a side of the first insulating member close to the second insulating member, and the first connecting layer is connected to a side of the protective member away from the second insulating member; a second connecting layer is provided on a side of the first insulating member away from the second insulating member, and the second connecting layer is used to connect the battery cells in the battery; a third connecting layer is provided on a side of the second insulating member close to the first insulating member, and the third connecting layer is connected to a side of the protective member away from the first insulating member.
[0011] In a possible embodiment, the placement hole passes through both sides of the protective member along a first direction; a first guide groove and a second guide groove are respectively provided on the protective member; an extension direction of the first guide groove and an extension direction of the second guide groove are both second directions perpendicular to the first direction; an end of the first guide groove close to the second guide groove is connected to the placement hole; and an end of the second guide groove close to the first guide groove is connected to the placement hole.
[0012] In a possible embodiment, a third guide groove and a fourth guide groove are respectively provided on the protective member; an extension direction of the third guide groove and an extension direction of the fourth guide groove are both a third direction; an end of the third guide groove close to the fourth guide groove is connected to the placement hole; an end of the fourth guide groove close to the third guide groove is connected to the placement hole; the third direction is perpendicular to the first direction and the second direction.
[0013] In a possible implementation manner, the chip is gap-matched with an inner wall of the placement hole.
[0014] In a possible implementation manner, the thickness of the protective element is 0.1-2 mm.
[0015] In a possible implementation manner, the ratio of the depth of the guide groove to the thickness of the protective element is 0.1-0.25.
[0016] In a second aspect, the present application also provides a battery, comprising a shell, a battery cell, an electrolyte and the above-mentioned bottom support sheet; the battery cell and the electrolyte are both arranged in the shell; the bottom support sheet is immersed in the electrolyte and is arranged between the shell and the battery cell.
[0017] Compared with the prior art, the present invention has the following beneficial effects:
[0018] The bottom support provided in the present application can divert the electrolyte in the battery to the mounting hole by setting the chip in the mounting hole opened on the protective member. The guide groove opened on the protective member can detect the fluid pressure of the electrolyte, so as to obtain the liquid level height of the electrolyte in the battery. According to the obtained liquid level height data, the service life of the battery can be analyzed and predicted, and safety problems caused by too low liquid level height can be avoided.
[0019] In order to make the above-mentioned objects, features and advantages of the present application more obvious and understandable, preferred embodiments are given below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0021] Figure 1 The figure shows an exploded schematic diagram of a bottom support sheet according to an embodiment of the present application;
[0022] Figure 2 A three-dimensional structural schematic diagram of a protective member according to an embodiment of the present application is shown.
[0023] Description of main component symbols:
[0024] 100-bottom support sheet; 110-protection member; 111-placement hole; 112-first guide groove; 113-second guide groove; 114-third guide groove; 115-fourth guide groove; 120-chip; 130-first insulating member; 140-second insulating member;
[0025] X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION
[0026] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.
[0027] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0028] 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0029] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0030] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0031] Embodiment 1
[0032] See also Figure 1 and Figure 2 In one embodiment of the present application, a bottom support sheet 100 is provided. The bottom support sheet 100 is used in a battery. The bottom support sheet 100 can detect the fluid pressure of the electrolyte in the battery to obtain the liquid level of the electrolyte. According to the obtained liquid level data, the service life of the battery can be analyzed and predicted, and safety problems caused by the liquid level being too low can be avoided.
[0033] See also Figure 1 , define the height direction of the bottom support piece 100 as the first direction X; the length direction of the bottom support piece 100 as the second direction Y; and the width direction of the bottom support piece 100 as the third direction Z.
[0034] The first direction X is perpendicular to the second direction Y, and the third direction Z is perpendicular to the first direction X and the second direction Y. It can be understood that the above definition is only for the purpose of facilitating the understanding of the relative position relationship of the various parts of the bottom support sheet 100, and should not be construed as a limitation to the present application.
[0035] The bottom support sheet 100 includes a protection member 110 , a chip 120 , a first insulating member 130 , and a second insulating member 140 .
[0036] The protection member 110 is provided with a placement hole 111 ; the placement hole 111 is used to accommodate the chip 120 .
[0037] The protection member 110 is also provided with at least one guide groove, which is in communication with the placement hole 111 . The guide groove is used to guide the electrolyte in the battery to the placement hole 111 .
[0038] The chip 120 in the placement hole 111 can detect the fluid pressure of the electrolyte, and then obtain the liquid level of the electrolyte in the battery.
[0039] The first insulating member 130 is disposed on one side of the protection member 110, and the second insulating member 140 is disposed on a side of the protection member 110 away from the first insulating member 130. The first insulating member 130 and the second insulating member 140 cooperate to prevent the chip 120 from falling from the placement hole 111.
[0040] The bottom support sheet 100 of this embodiment, by setting the chip 120 in the placement hole 111 opened on the protective member 110, the guide groove opened on the protective member 110 can guide the electrolyte in the battery to the placement hole 111; the chip 120 can detect the fluid pressure of the electrolyte, thereby obtaining the liquid level of the electrolyte in the battery, and according to the obtained liquid level data, the service life of the battery can be analyzed and predicted, and safety problems caused by the liquid level being too low can be avoided. By setting the first insulating member 130 on one side of the protective member 110, and setting the second insulating member 140 on the side of the protective member 110 away from the first insulating member 130; the cooperation between the first insulating member 130 and the second insulating member 140 can prevent the chip 120 from falling from the placement hole 111.
[0041] The chip 120 obtains the liquid level data of the electrolyte using the formula:
[0042]
[0043] Wherein, P is the fluid pressure of the electrolyte; h is the liquid level of the electrolyte; ρ is the density of the electrolyte; and g is the acceleration due to gravity.
[0044] See also Figure 1 and Figure 2 The shape of the placement hole 111 matches the shape of the chip 120. The placement hole 111 passes through both sides of the protection member 110 along the first direction X, and the extension direction of the placement hole 111 is the first direction X.
[0045] In some embodiments, the bottom support sheet 100 is immersed in the electrolyte, and the bottom support sheet 100 is disposed between the battery cell and the shell of the battery.
[0046] Preferably, the bottom support sheet 100 is disposed at the bottom of the battery cell. Since the first insulating member 130 and the second insulating member 140 are both made of insulating materials; and the protective member 110 and the chip 120 are both disposed between the first insulating member 130 and the second insulating member 140; the bottom support sheet 100 can support the battery cell in the shell while preventing the bottom of the battery cell from contacting the bottom surface of the inner wall of the shell, thereby preventing a short circuit between the battery cell and the shell.
[0047] In some embodiments, the guide groove is opened on the side of the protective member 110 away from the second insulating member 140. The side of the first insulating member 130 away from the protective member 110 can be connected to the protective film at the bottom of the battery cell, so that the bottom support sheet 100 is arranged at the bottom of the battery cell.
[0048] In some embodiments, a first connection layer is provided on a side of the first insulating member 130 close to the second insulating member 140, and the first connection layer is used to connect the side of the protective member 110 away from the second insulating member 140. A second connection layer is provided on a side of the first insulating member 130 away from the second insulating member 140, and the second connection layer is used to connect the protective film at the bottom of the battery cell.
[0049] A third connection layer is disposed on a side of the second insulating member 140 close to the first insulating member 130 , and the third connection layer is used to connect a side of the protective member 110 away from the first insulating member 130 .
[0050] Exemplarily, the first connection layer, the second connection layer, and the third connection layer are all adhesive layers made of insulating adhesive.
[0051] In some embodiments, a thickness of the first insulating layer along the first direction X and a thickness of the second insulating layer along the first direction X are both between 0.1 mm and 3 mm.
[0052] In some embodiments, the thickness of the first connection layer along the first direction X, the thickness of the second connection layer along the first direction X, and the thickness of the third connection layer along the first direction X are all between 0.05-1 mm.
[0053] In another embodiment, the guide groove is disposed on a side of the protection member 110 away from the first insulating member 130 , and the fluid pressure of the electrolyte in the battery can also be detected.
[0054] In some embodiments, the chip 120 is matched with the inner wall gap of the placement hole 111, and the electrolyte can flow into the gap between the chip 120 and the placement hole 111 through the guide groove, so that the chip 120 detects the fluid pressure of the electrolyte.
[0055] In another embodiment, the chip 120 is interference fit with the inner wall of the mounting hole 111, and the bottom height of the guide groove along the first direction X is higher than the height of the chip 120 along the first direction X close to one end of the first insulating member 130, so that the electrolyte in the guide groove flows directly to the chip 120, and the chip 120 can also detect the fluid pressure of the electrolyte.
[0056] In some embodiments, only one guide groove is provided on the bottom support sheet 100. In other embodiments, a plurality of guide grooves are provided on the bottom support sheet 100 to ensure sufficient contact between the chip 120 and the electrolyte.
[0057] In some embodiments, the protective member 110 is respectively provided with a first guide groove 112 and a second guide groove 113; the first guide groove 112 is arranged at one end of the protective member 110 along the second direction Y, and the second guide groove 113 is arranged at one end of the protective member 110 along the second direction Y away from the first guide groove 112.
[0058] One end of the first guide groove 112 along the second direction Y close to the second guide groove 113 is communicated with the placement hole 111 ; one end of the second guide groove 113 along the second direction Y close to the first guide groove 112 is communicated with the placement hole 111 .
[0059] Preferably, an extension direction of the first guide groove 112 and an extension direction of the second guide groove 113 are both the second direction Y.
[0060] Furthermore, the protective member 110 is also provided with a third guide groove 114 and a fourth guide groove 115 respectively; the third guide groove 114 is arranged at one end of the protective member 110 along the third direction Z, and the fourth guide groove 115 is arranged at one end of the protective member 110 along the third direction Z away from the third guide groove 114.
[0061] One end of the third guide groove 114 along the third direction Z close to the fourth guide groove 115 is communicated with the placement hole 111 ; one end of the fourth guide groove 115 along the third direction Z close to the third guide groove 114 is communicated with the placement hole 111 .
[0062] Preferably, an extension direction of the third guide groove 114 and an extension direction of the fourth guide groove 115 are both the third direction Z.
[0063] In some embodiments, the thickness of the protection member 110 along the first direction X is 0.1-2 mm.
[0064] Furthermore, a ratio between a depth of the guide groove along the first direction X and a thickness of the protection member 110 along the first direction X is 0.1-0.25.
[0065] Preferably, when the ratio of the depth of the guide groove along the first direction X to the thickness of the protection member 110 along the first direction X is 0.15, the effect of the guide groove in guiding the electrolyte is optimal.
[0066] In some embodiments, the bottom support sheet 100 further includes a controller; the controller is communicatively connected with the chip 120 .
[0067] The chip 120 can convert the detected liquid level data into an electrical signal, and then transmit the electrical signal to the controller via wireless communication, so that the operator can monitor the liquid level data of the electrolyte in the battery in real time.
[0068] Exemplarily, the controller is a PLC (Programmable Logic Controller).
[0069] Embodiment 2
[0070] The present application also provides a battery, comprising a shell, a battery cell, an electrolyte and the above-mentioned bottom support sheet 100; the battery cell and the electrolyte are both arranged in the shell; the bottom support sheet 100 is immersed in the electrolyte and is arranged between the shell and the battery cell.
[0071] The battery provided in this embodiment has the bottom support sheet 100 provided in any of the above embodiments, and therefore has all the beneficial effects of the bottom support sheet 100 provided in any of the above embodiments, which will not be described in detail here.
[0072] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0073] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.
Claims
1. A bottom support sheet for a battery, characterized in that: The bottom support sheet comprises: The protective member is provided with a placement hole; the protective member is also provided with at least one guide groove; the guide groove is connected with the placement hole; A chip is arranged in the placement hole; the chip is used to detect the fluid pressure of the electrolyte in the battery.
2. The bottom support sheet according to claim 1, characterized in that: The bottom supporting piece further includes a first insulating member and a second insulating member; the first insulating member is arranged on one side of the protective member; and the second insulating member is arranged on a side of the protective member away from the first insulating member.
3. The bottom support sheet according to claim 2, characterized in that: The guide groove is disposed on a side of the protection component away from the second insulating component.
4. The bottom support sheet according to claim 3, characterized in that: A first connecting layer is provided on a side of the first insulating member close to the second insulating member, and the first connecting layer is connected to a side of the protective member away from the second insulating member; a second connecting layer is provided on a side of the first insulating member away from the second insulating member, and the second connecting layer is used to connect the battery cells in the battery; a third connecting layer is provided on a side of the second insulating member close to the first insulating member, and the third connecting layer is connected to a side of the protective member away from the first insulating member.
5. The bottom support sheet according to any one of claims 1 to 4, characterized in that: The placement hole passes through both sides of the protective member along a first direction; a first guide groove and a second guide groove are respectively provided on the protective member; an extension direction of the first guide groove and an extension direction of the second guide groove are both second directions perpendicular to the first direction; an end of the first guide groove close to the second guide groove is connected to the placement hole; an end of the second guide groove close to the first guide groove is connected to the placement hole.
6. The bottom support sheet according to claim 5, characterized in that: A third guide groove and a fourth guide groove are respectively provided on the protective member; the extension direction of the third guide groove and the extension direction of the fourth guide groove are both the third direction; one end of the third guide groove close to the fourth guide groove is connected to the placement hole; one end of the fourth guide groove close to the third guide groove is connected to the placement hole; the third direction is perpendicular to the first direction and the second direction.
7. The bottom support sheet according to any one of claims 1 to 4, characterized in that: The chip is loosely matched with the inner wall of the placement hole.
8. The bottom support sheet according to any one of claims 1 to 4, characterized in that: The thickness of the protective member is 0.1-2 mm.
9. The bottom support sheet according to claim 8, characterized in that: The ratio between the depth of the guide groove and the thickness of the protective element is 0.1-0.
25.
10. A battery, characterized in that: It comprises a shell, a battery cell, an electrolyte and the bottom support sheet as described in any one of claims 1 to 9; the battery cell and the electrolyte are both arranged in the shell; the bottom support sheet is immersed in the electrolyte and is arranged between the shell and the battery cell.