Battery pack damping structure and AMR power battery

Abstract

The utility model provides a battery pack damping structure and an AMR power battery. The battery pack damping structure comprises a shell, a battery cell module, a buffer part, a first holding part and a second holding part, the battery cell module is arranged in the shell, and the buffer part is positioned between the shell and the battery cell module; the first holding part is fixedly arranged on the outer surface of the battery cell module, and the second holding part is fixedly arranged on the inner surface of the shell; the first holding part and the second holding part are oppositely arranged, and a beam limiting space is formed between the first holding part and the second holding part; after the battery cell module is arranged in the shell, the buffer piece arranged at the position of the first maintaining part can be firmly maintained in the beam limiting space under the abutting action of the second maintaining part, and when AMR is under the working condition of high-frequency permanent random vibration or rated acceleration impact, the AMR can be prevented from falling off. Therefore, the buffer part is restrained and is not easy to slide out of the position corresponding to the first retaining part, so that a relatively fixed position can be kept between the shell and the battery cell module.

Description

Technical Field

[0001] This disclosure relates to the technical field of power batteries, and in particular to a battery pack vibration reduction structure and an AMR power battery. Background Technology

[0002] During the operation of an AMR (Autonomous Mobile Robot), the constantly changing speed and trajectory can cause the internal battery modules to sway due to inertia, affecting the power supply stability of the battery modules. Therefore, some manufacturers use high-strength lithium battery pack fixing structures, such as those disclosed in Chinese patent document CN217655990U. While these structures can reduce the displacement of the battery modules through buffer components, the buffer components are prone to slippage under high-frequency, sustained random vibration or constant acceleration impact conditions of the AMR due to their installation design. Slippage of the buffer components can lead to an imbalance of forces in all directions on the battery module, causing misalignment and ultimately resulting in the failure of the battery module's electrical connection structure. Utility Model Content

[0003] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a battery pack vibration reduction structure and AMR power battery with good buffering and vibration reduction effect and enhanced battery module stability.

[0004] The purpose of this disclosure is achieved through the following technical solution:

[0005] A battery pack vibration damping structure includes a housing, a cell module, and a buffer; the cell module is disposed within the housing, and the buffer is located between the housing and the cell module, so that the housing and the cell module are interference-fitted.

[0006] The battery pack vibration damping structure also includes a first retaining component and a second retaining component;

[0007] The first retaining member is fixedly disposed on the outer surface of the battery cell module, and the second retaining member is fixedly disposed on the inner surface of the housing; the first retaining member and the second retaining member are positioned opposite each other, and a confinement space is formed between the first retaining member and the second retaining member; the buffer is disposed at the position of the first retaining member, and the second retaining member abuts against the buffer, so that the buffer is held within the confinement space.

[0008] In some embodiments, a beam-limiting slot is formed on the first retaining member, and the buffer is disposed within the beam-limiting slot; the second retaining member abuts against the buffer and blocks the entry and exit points of the beam-limiting slot.

[0009] In some embodiments, the first retaining member includes two opposing stop tabs, with the constraint bayonet forming between the two stop tabs.

[0010] In some embodiments, the first retaining component further includes a reinforcing rib; the reinforcing rib is fixedly disposed on the outer surface of the battery cell module and connected to the side of the stop protrusion opposite to the constraint slot.

[0011] In some embodiments, the second retaining member extends in a strip shape; at least two of the first retaining members are arranged along the extending direction of the second retaining member to form a positioning assembly; the buffer is inserted into each of the restraining slots located in the same positioning assembly and abuts against the second retaining member.

[0012] In some embodiments, the second retaining member includes two opposing pressure feet, each pressure foot abutting against one side of the buffer member, and a contraction gap is formed between the two pressure feet.

[0013] In some embodiments, the housing includes a magnesium-aluminum alloy cylinder and an end cap, the battery cell module is disposed in the magnesium-aluminum alloy cylinder, and the end cap is disposed at the opening of the magnesium-aluminum alloy cylinder; the second retaining member is fixed to the inner wall of the magnesium-aluminum alloy cylinder and engages with the locking mechanism on the end cap.

[0014] In some embodiments, adjacent rows of cells in the cell module are separated by a thermally insulating aerogel sheet; and / or,

[0015] The buffer is an aerogel composite block.

[0016] In some embodiments, each cell in the cell module is provided with a flexible force sensor at its terminal, and the flexible force sensor is electrically connected to the battery protection board of the cell module; and / or,

[0017] Each cell in the battery module is equipped with a temperature sensor at its terminal, and the temperature sensor is electrically connected to the battery protection board of the battery module; and / or,

[0018] A current sensor is provided on the electrode terminals of the battery cell module, and the current sensor is used to obtain the remaining power of the battery cell module.

[0019] An AMR power battery includes the battery pack vibration reduction structure of any of the above embodiments.

[0020] Compared with the prior art, this disclosure has at least the following advantages:

[0021] In the aforementioned battery pack vibration damping structure, after the cell module is installed inside the housing, the first retaining member fixed on the outer surface of the cell module and the second retaining member fixed on the inner surface of the housing can form a confinement space relative to each other. The buffer member located at the position of the first retaining member can be reliably held within the confinement space by the supporting action of the second retaining member. When the AMR is subjected to high-frequency continuous random vibration or constant acceleration impact, the buffer member is less likely to slip out of the position corresponding to the first retaining member due to the supporting force and the size of the confinement space. Thus, it can maintain a relatively fixed position between the housing and the cell module, so that the cell module can maintain a balanced state of force in all directions. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is an exploded view of a battery pack vibration damping structure according to an embodiment of the present disclosure;

[0024] Figure 2 for Figure 1 The cross-sectional view of the battery pack vibration damping structure shown;

[0025] Figure 3 for Figure 2 The enlarged view shown at point A in the middle;

[0026] Figure 4 for Figure 1 The enlarged view shown at point B in the middle;

[0027] Figure 5 for Figure 1 The enlarged view shown at point C in the middle;

[0028] Figure 6 for Figure 1 An exploded view of the cell module in the battery pack vibration damping structure shown.

[0029] Figure label:

[0030] 100. Shell; 110. Magnesium-aluminum alloy cylinder; 120. End cap; 1210. Locking position; 1220. Protrusion;

[0031] 200. Battery cell module; 210. Battery cell; 2101. Thermal insulation aerogel sheet; 211. Electrode terminal block; 212. Battery protection board; 201. Flexible force sensor; 202. Temperature sensor; 203. Current sensor; 204. Groove; 205. Screw;

[0032] 300. Buffer components;

[0033] 400. First retaining component; 410. Stopping protrusion; 420. Reinforcing rib; 401. Beam limiting space; 4011. Beam limiting bayonet;

[0034] 500, Second retaining component; 510, Pressing foot; 501, Contraction gap. Detailed Implementation

[0035] To facilitate understanding of this disclosure, a more complete description will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the present disclosure. However, this disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure.

[0036] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] To better understand the technical solutions and beneficial effects of this disclosure, the following detailed description is provided in conjunction with specific embodiments:

[0039] Please refer to the following: Figures 1 to 3This disclosure provides a battery pack vibration damping structure including a housing 100, a cell module 200, a buffer 300, a first retaining member 400, and a second retaining member 500. The cell module 200 is disposed within the housing 100, and the buffer 300 is located between the housing 100 and the cell module 200 to allow an interference fit between the housing 100 and the cell module 200. The first retaining member 400 is fixedly disposed on the outer surface of the cell module 200, and the second retaining member 500 is fixedly disposed on the inner surface of the housing 100. The first retaining member 400 and the second retaining member 500 are positioned opposite each other, and a confinement space 401 is formed between the first retaining member 400 and the second retaining member 500. The buffer 300 is disposed at the position of the first retaining member 400, and the second retaining member 500 abuts against the buffer 300 to keep the buffer 300 within the confinement space 401.

[0040] It is understandable that after the cell module 200 is installed inside the housing 100, the first retaining member 400 fixed on the outer surface of the cell module 200 and the second retaining member 500 fixed on the inner surface of the housing 100 can form a confinement space 401 with their positions relative to each other. The buffer member 300 located at the position of the first retaining member 400 can be reliably held in the confinement space 401 under the support of the second retaining member 500. When the AMR is subjected to high-frequency continuous random vibration or constant acceleration impact, the buffer member 300 is less likely to slip out of the position corresponding to the first retaining member 400 due to the support force and the size of the confinement space 401. Thus, it can maintain a relatively fixed position between the housing 100 and the cell module 200, so that the cell module 200 is kept in a balanced state of force in all directions.

[0041] Please refer to the following: Figure 1 and Figure 4 In some embodiments, a beam-limiting slot 4011 is formed on the first retaining member 400, and the buffer member 300 is disposed within the beam-limiting slot 4011; the second retaining member 500 abuts against the buffer member 300 and blocks the entry and exit of the beam-limiting slot 4011. It can be understood that by holding the buffer member 300 located within the beam-limiting slot 4011 with the second retaining member 500, the movement space of the buffer member 300 can be restricted by the beam-limiting slot 4011, and by blocking the entry and exit of the beam-limiting slot 4011 with the second retaining member 500, the buffer member 300 can be further prevented from falling out of the beam-limiting slot 4011, so as to better adapt to the working conditions of AMR high-frequency sustained random vibration or constant acceleration impact.

[0042] Please see Figure 4In some embodiments, the first retaining member 400 includes two opposing stop tabs 410, with a constraint-limiting slot 4011 formed between the two stop tabs 410. It is understood that, since the constraint-limiting slot 4011 is formed between the two opposing stop tabs 410, after the buffer member 300 is disposed within the constraint-limiting slot 4011, the stop tabs 410 can interfere with the position of the buffer member 300, thereby ensuring that the buffer member 300 is always held between the two stop tabs 410.

[0043] Please see Figure 3 In some embodiments, the buffer 300 and the first retaining member 400 are bonded together by an adhesive backing layer (not shown). It is understood that the buffer 300 is bonded to the first retaining member 400 by the adhesive backing layer, which can further reduce slippage between the buffer 300 and the first retaining member 400.

[0044] Please see Figure 4 In some embodiments, the first retaining member 400 further includes a reinforcing rib 420; the reinforcing rib 420 is fixedly disposed on the outer surface of the cell module 200 and connected to the side of the stop protrusion 410 opposite to the constraint-limiting slot 4011. It can be understood that since the reinforcing rib 420 is connected to the side of the stop protrusion 410 opposite to the constraint-limiting slot 4011, and the reinforcing rib 420 is fixed to the outer surface of the cell module 200, the structural strength of the stop protrusion 410 can be enhanced by the reinforcing rib 420. In this embodiment, the reinforcing rib 420 has a triangular plate-like structure, with its first right-angled side connected to the outer surface of the cell module 200, and its second right-angled side connected to the side of the stop protrusion 410 opposite to the constraint-limiting slot 4011.

[0045] Please refer to 1 as well. Figure 3 and Figure 4 In some embodiments, the second retaining member 500 extends in a strip shape; at least two first retaining members 400 are arranged along the extending direction of the second retaining member 500 to form a positioning assembly; the buffer member 300 passes through each of the restraining slots 4011 located in the same positioning assembly and abuts against the second retaining member 500. It can be understood that because the buffer member 300 passes through the restraining slots 4011 of each of the first retaining members 400 located in the same positioning assembly, and the first retaining members 400 in the same positioning assembly are arranged along the extending direction of the second retaining member 500, they can abut against the buffer member 300 through the second retaining member 500. Thus, the buffer member 300 can be jointly restrained by each of the second retaining members 500 in the positioning assembly, thereby further reducing the slippage of the buffer member 300.

[0046] Please see Figure 3In some embodiments, the second retaining member 500 includes two opposing pressure feet 510, each pressure foot 510 abutting against one side of the buffer member 300, and a contraction gap 501 is formed between the two pressure feet 510. It is understood that by having each pressure foot 510 abut against one side of the buffer member 300, a triangular support structure can be formed between the second retaining member 500 and the buffer member 300. When the vibration or impact is large, the contraction gap 501 between the two pressure feet 510 can open to withstand greater pressure, while when the vibration or impact is small, the contraction gap 501 can contract to provide more stable support for the buffer member 300.

[0047] Please refer to the following: Figure 1 , Figure 3 and Figure 5 In some embodiments, the housing 100 includes a magnesium-aluminum alloy cylindrical body 110 and an end cap 120. The battery cell module 200 is disposed inside the magnesium-aluminum alloy cylindrical body 110, and the end cap 120 covers the opening of the magnesium-aluminum alloy cylindrical body 110. A second retaining member 500 is fixed to the inner wall of the magnesium-aluminum alloy cylindrical body 110 and engages with a locking slot 1210 on the end cap 120. It is understood that because the housing 100 includes the magnesium-aluminum alloy cylindrical body 110, the magnesium-aluminum alloy cylindrical body 110 is lighter than existing stainless steel or aluminum sheet metal cylindrical bodies of the same volume, which can reduce motion inertia and thus reduce vibration. Meanwhile, under the same volume conditions, the energy density of traditional battery pack structures is typically 90–100 Wh / kg, while the energy density of the above-mentioned battery pack vibration reduction structure can typically reach over 120 Wh / kg. Please refer to... Figure 1 In this embodiment, the cell module 200 has a groove 204, and the end cap 120 has a protrusion 1220. After the groove 204 and the protrusion 1220 are engaged, they are locked by screws 205 to further improve the stability of the battery pack vibration damping structure. In other embodiments, the end cap 120 is interference-fitted to the opening of the magnesium-aluminum alloy cylinder 110.

[0048] It should be noted that the battery cell module 200 can be a conventional battery cell module 200, so it will not be described in detail here. Please refer to [link / reference]. Figure 6In some embodiments, adjacent rows of cells 210 in the cell module 200 are separated by a thermal insulation aerogel sheet 2101. It is understood that because adjacent rows of cells 210 in the cell module 200 are separated by the thermal insulation aerogel sheet 2101, the thermal insulation aerogel sheet 2101 can effectively block the rapid heat diffusion of the cells 210 during high-rate charging and discharging, thereby delaying or blocking heat transfer between adjacent rows of cells 210, thus ensuring the safety of the entire cell module 200. In this embodiment, the thermal insulation aerogel sheet 2101 is an aerospace-grade thermal insulation aerogel sheet 2101, and a portion of the thermal insulation aerogel sheet 2101 bends between two adjacent cells 210 to further delay or block heat transfer between the two adjacent cells 210.

[0049] Please see Figure 3 In some embodiments, the buffer 300 is an aerogel composite block. It can be understood that the aerogel composite block is cut from a conventional aerogel composite sheet. The aerogel composite block can not only reduce the space occupied within the housing 100, but also further reduce the overall weight of the battery pack vibration damping structure, ultimately improving the mobility of the AMR.

[0050] Please see Figure 6 In some embodiments, each electrode of the battery cell 210 in the battery cell module 200 is provided with a flexible force sensor 201, which is electrically connected to the battery protection board 212 of the battery cell module 200. It can be understood that because each electrode of the battery cell 210 in the battery cell module 200 is provided with a flexible force sensor 201, and the flexible force sensor 201 is electrically connected to the battery protection board 212 of the battery cell module 200, the flexible force sensor 201 can upload the pressure data of each battery cell 210 to the battery protection board 212 in real time. When the pressure data change value exceeds the set range, the battery protection board 212 first issues an alarm and then shuts down the charging and discharging circuit.

[0051] Please see Figure 6 In some embodiments, each cell 210 in the cell module 200 has a temperature sensor 202 at its electrode, and the temperature sensor 202 is electrically connected to the battery protection board 212 of the cell module 200. It can be understood that because each cell 210 in the cell module 200 has a temperature sensor 202 at its electrode, and the temperature sensor 202 is electrically connected to the battery protection board 212 of the cell module 200, the temperature sensor 202 can upload the acquired temperature data of each cell 210 to the battery protection board 212 in real time. When the temperature data change exceeds a set range, the battery protection board 212 first issues an alarm and then shuts down the charging and discharging circuit.

[0052] Please see Figure 6In this embodiment, it should be specifically noted that the battery protection board 212 described above can adopt a traditional BMS (Battery Monitoring and Management System) component, so it will not be described in detail here. Meanwhile, the methods of the flexible force sensor 201 acquiring pressure data of each cell 210 and uploading it to the battery protection board 212 in real time, the methods of the temperature sensor 202 acquiring temperature data of each cell 210 and uploading it to the battery protection board 212 in real time, and the methods of the battery protection board 212 issuing an alarm and shutting down the charging and discharging circuit when the temperature data change value or pressure data change value exceeds the set range are all prior art and are not within the scope of protection of this disclosure.

[0053] Please see Figure 5 In some embodiments, a current sensor 203 is provided on the electrode terminal 211 of the cell module 200. The current sensor 203 is used to obtain the remaining power of the cell module 200. It can be understood that compared to the traditional method of reading the remaining power data of each cell 210 through an IC card (Integrated Circuit Card), by placing the current sensor 203 on the electrode terminal 211 of the cell module 200, the remaining power of the entire cell module 200 can be obtained directly through the current sensor 203 at once. The fluctuation of the remaining power of the entire cell module 200 is smaller and more accurate, ultimately achieving precise monitoring of the overall remaining power of the cell module 200. In this embodiment, the current sensor 203 is a Hall current sensor 203. The Hall current sensor 203 can improve the overall metering accuracy of the cell module 200 using magnetic sensing technology under continuous charging and discharging conditions, thereby achieving accurate calculation of the remaining power across the entire temperature range. It should be noted that the method by which the current sensor 203 obtains the remaining power of the battery module 200 is prior art and is not within the scope of protection of this disclosure.

[0054] This disclosure also provides an AMR power battery, including the battery pack vibration damping structure of any of the above embodiments. It can be understood that by applying the battery pack vibration damping structure of this disclosure to an AMR power battery, after the cell module 200 is disposed within the housing 100, the first retaining member 400 fixed to the outer surface of the cell module 200 can form a confinement space 401 with the second retaining member 500 fixed to the inner surface of the housing 100. The buffer member 300 disposed at the position of the first retaining member 400 can be reliably held within the confinement space 401 under the resistance of the second retaining member 500. When the AMR is subjected to high-frequency, sustained random vibration or constant acceleration impact, the buffer member 300 is less likely to slip out of the position corresponding to the first retaining member 400 due to the resistance force and the size of the confinement space 401. Therefore, it can maintain a relatively fixed position between the housing 100 and the cell module 200, so that the cell module 200 maintains a balanced state of force in all directions.

[0055] Compared with the prior art, this disclosure has at least the following advantages:

[0056] In the aforementioned battery pack vibration damping structure, after the cell module 200 is installed inside the housing 100, the first retaining member 400 fixed on the outer surface of the cell module 200 and the second retaining member 500 fixed on the inner surface of the housing 100 can form a confinement space 401 with their positions opposite to each other. The buffer member 300 located at the position of the first retaining member 400 can be reliably held in the confinement space 401 under the support of the second retaining member 500. When the AMR is subjected to high-frequency continuous random vibration or constant acceleration impact, the buffer member 300 is less likely to slip out of the position corresponding to the first retaining member 400 due to the support force and the size of the confinement space 401. Thus, it can maintain a relatively fixed position between the housing 100 and the cell module 200, so that the cell module 200 is kept in a balanced state of force in all directions.

[0057] The embodiments described above are merely illustrative of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these all fall within the protection scope of this disclosure. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A battery pack damping structure, comprising a shell, a battery cell module and a buffer; the battery cell module is arranged in the shell, and the buffer is located between the shell and the battery cell module to make the shell and the battery cell module interference fit. characterized in that The battery pack damping structure further comprises a first retaining component and a second retaining component. The first retaining component is fixedly arranged on the outer surface of the battery cell module, and the second retaining component is fixedly arranged on the inner surface of the shell; the first retaining component and the second retaining component are oppositely arranged, and a limited space is formed between the first retaining component and the second retaining component; the buffer is arranged at the position of the first retaining component, and the second retaining component abuts against the buffer to make the buffer remain in the limited space.

2. The battery pack vibration damping structure according to claim 1, wherein A limited aperture is formed on the first retaining component, and the buffer is arranged in the limited aperture; the second retaining component abuts against the buffer and blocks the entrance of the limited aperture.

3. The battery pack vibration damping structure according to claim 2, characterized by The first retaining component comprises two oppositely arranged stop tabs, and the limited aperture is formed between the two stop tabs.

4. The battery pack vibration damping structure according to claim 3, characterized by The first retaining component further comprises a reinforcing rib; the reinforcing rib is fixedly arranged on the outer surface of the battery cell module and connected to the side of the stop tab away from the limited aperture.

5. The battery pack damping structure according to claim 2, characterized by The second retaining component is arranged in a strip shape; at least two first retaining components are arranged along the extension direction of the second retaining component to form a positioning assembly; the buffer is arranged in each limited aperture in the same positioning assembly and abuts against the second retaining component.

6. The battery pack damping structure according to claim 1, characterized by The second retaining component comprises two oppositely arranged pressing feet, each of which abuts against one side of the buffer, and a contraction gap is formed between the two pressing feet.

7. The battery pack damping structure according to claim 1, wherein The shell comprises a magnesium-aluminum alloy cylinder and an end cover; the battery cell module is arranged in the magnesium-aluminum alloy cylinder, and the end cover covers the opening of the magnesium-aluminum alloy cylinder; the second retaining component is fixedly arranged on the inner cylinder wall of the magnesium-aluminum alloy cylinder and cooperates with the clamping position on the end cover.

8. The battery pack damping structure according to claim 1, characterized by, The two adjacent rows of battery cells in the battery cell module are separated by a heat-insulating aerogel sheet; and / or The buffer is an aerogel composite block.

9. The battery pack damping structure according to claim 1, wherein A flexible force sensor is arranged at the electrode end of each battery cell in the battery cell module, and the flexible force sensor is electrically connected to the battery protection plate of the battery cell module; and / or A temperature sensor is arranged at the electrode end of each battery cell in the battery cell module, and the temperature sensor is electrically connected to the battery protection plate of the battery cell module; and / or A current sensor is arranged on the electrode terminal of the battery cell module, and the current sensor is used to obtain the remaining power of the battery cell module.

10. An AMR power cell characterized by, The battery pack damping structure according to any one of claims 1 to 9.

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