Battery cell restraining assembly and battery cell restraining tray

Abstract

This utility model discloses a battery cell restraint assembly and a battery cell restraint tray. The battery cell restraint assembly includes multiple fixing plates and at least one inner liner plate, with the fixing plates spaced apart. At least one inner liner plate is disposed between every two adjacent fixing plates, and the inner liner plate and the fixing plates are used to clamp the battery cell. Single air bladders are disposed on both sides of the inner liner plate, and the single air bladders cover the inner liner plate to form a sealed cavity. The inner liner plate has gas channels connecting the sealed cavities on both sides, and air tubes are connected to the ends of the gas channels. When gas is injected into the air tubes, the single air bladders on both sides of the inner liner plate expand, and the battery cell is restrained between the corresponding single air bladder and the fixing plate. When gas is extracted from the air tubes, the single air bladders on both sides of the inner liner plate contract. This utility model can reduce the number of air tubes, lower manufacturing costs, and improve the uniformity of restraint.

Description

Technical Field

[0001] This utility model relates to the field of battery cell manufacturing technology, and in particular to a battery cell restraint assembly and a battery cell restraint tray. Background Technology

[0002] Lithium-ion batteries, as a rechargeable clean energy source, are widely used in digital devices, electric vehicles, and other products. The manufacturing process of lithium-ion batteries includes a formation process, the main function of which is to activate the battery. During formation, the lithium-ion battery expands, therefore, a cell restraint tray is used to restrain the battery and control its thickness.

[0003] Some existing battery cell restraint trays use airbag restraint, with one battery cell restrained between every two adjacent airbags. Each airbag needs to be connected to an air tube for inflation and deflation to control restraint and release. As a result, a large number of air tubes are required, the air path is not aesthetically pleasing, and the cost of the battery cell restraint tray is high. Utility Model Content

[0004] The main purpose of this utility model is to provide a battery cell restraint assembly and a battery cell restraint tray, which aims to reduce the number of air tubes, reduce manufacturing costs, and improve the uniformity of restraint.

[0005] To achieve the above objectives, the present invention provides a cell restraint tray comprising:

[0006] Multiple fixing plates are arranged at intervals between them;

[0007] At least one inner liner plate is provided between each two adjacent fixing plates, and the inner liner plate and the fixing plate are used to clamp the battery cell.

[0008] The inner lining plate is provided with single airbags on both sides, and the single airbags cover the inner lining plate to form a sealed cavity. The inner lining plate has gas channels that connect the sealed cavities on both sides. The inner lining plate is connected to an air pipe at the port of the gas channel.

[0009] When gas is introduced into the trachea, the single-piece airbags on both sides of the inner liner expand, and the battery cell is constrained between the corresponding single-piece airbag and the fixing plate; when gas is extracted from the trachea, the single-piece airbags on both sides of the inner liner contract.

[0010] Furthermore, the plurality of inner lining plates and the plurality of fixing plates are arranged in an alternating pattern.

[0011] Furthermore, the inner lining plate is perforated to form ventilation holes, and the two ends of the ventilation holes are respectively connected to the sealed cavities on both sides, and the ventilation holes are connected to the gas channels.

[0012] Furthermore, the shape of the single-piece airbag is rectangular or square.

[0013] Furthermore, the battery cell restraint assembly also includes an airbag pressure strip, which presses against the periphery of the single airbag and connects to the inner liner plate to form the sealed cavity.

[0014] Furthermore, the periphery of the single airbag is glued to the inner liner.

[0015] Furthermore, the airbag pressure strip and the single airbag are screwed onto the inner liner plate.

[0016] This utility model also proposes a battery cell restraint tray, the battery cell restraint tray comprising:

[0017] A battery cell tray, wherein the battery cell tray is provided with a receiving cavity;

[0018] A cell restraint assembly, wherein the restraint assembly is disposed within the receiving cavity;

[0019] The cell restraint assembly includes:

[0020] Inner lining;

[0021] A fixing plate is provided, with the inner liner plate and the fixing plate arranged at intervals, and the inner liner plate and the fixing plate are used to clamp the battery cell;

[0022] The inner lining plate is provided with single airbags on both sides, and the single airbags cover the inner lining plate to form a sealed cavity. The inner lining plate has gas channels that connect the sealed cavities on both sides. The inner lining plate is connected to an air pipe at the port of the gas channel.

[0023] When gas is introduced into the trachea, the single-piece airbags on both sides of the inner liner expand, and the battery cell is constrained between the corresponding single-piece airbag and the fixing plate; when gas is extracted from the trachea, the single-piece airbags on both sides of the inner liner contract.

[0024] Furthermore, multiple guide rods are fixedly connected to both sides of the battery cell tray, the fixed plate is fixedly connected to the guide rods, and the inner liner plate is movably connected to the guide rods.

[0025] Furthermore, the battery cell tray is provided with an inner lining support block, the inner lining plate and the fixing plate are supported on the inner lining support block, the inner lining support block is provided with two limiting ribs, and a movable groove is defined between the two limiting ribs. The inner lining plate is disposed in the movable groove and can move within the movable groove.

[0026] Furthermore, the fixing plate is screwed onto the guide rod.

[0027] Furthermore, a limiting mounting block is provided between the inner liner plate and the fixing plate. The limiting mounting block is used to support the battery cell and is screwed to the inner liner plate.

[0028] Furthermore, the battery cell restraint tray also includes multiple heating elements, with each pair of heating elements respectively disposed on both sides of the fixing plate, and each single airbag having a heating element disposed on the side opposite to the inner liner plate, with each heating element being attached to the corresponding battery cell.

[0029] Furthermore, a probe-type thermal resistor is embedded in the limiting mounting block, which is used to detect the temperature of the limiting mounting block.

[0030] When the battery cell needs to be restrained, gas is injected into the air tube. The gas enters the sealed cavity through the gas channel, and the expansion of the sealed cavity causes the single airbag to expand. The single airbag then directly expands and compresses the battery cell against the fixing plate. At this time, one side of the battery cell is compressed by the single airbag, and the other side is compressed by the fixing plate, thus restraining the battery cell and preventing deformation. When the battery cell needs to be released, the external device extracts the gas from the sealed cavity through the air tube. The single airbag contracts, releasing the restraint. A gap exists between the single airbag and the fixing plate, allowing the battery cell to be removed. This design allows for simultaneous control of the expansion or contraction of the single airbags on both sides by only inflating and deflating the air tube of the inner liner plate. This directly restrains the battery cell between the single airbag of the inner liner plate and the fixing plate. Compared to the traditional method of setting airbags and connecting air tubes to each inner liner plate and fixing plate, this effectively reduces the number of air tubes and lowers manufacturing costs. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the battery cell restraint tray of this utility model;

[0032] Figure 2 This is a schematic diagram of the structure of the battery cell restraint tray of this utility model without the battery cell tray;

[0033] Figure 3 This is a schematic diagram of the structure of the battery cell restraint assembly of this utility model;

[0034] Figure 4 This is an exploded view of the battery cell restraint assembly of this utility model;

[0035] Figure 5 This is an exploded view of the inner liner plate, single-piece airbag, and heating element in the battery cell restraint assembly of this utility model;

[0036] Figure 6 This is a schematic diagram of the inner liner plate in the battery cell restraint assembly of this utility model.

[0037] Reference numerals: 100, Battery cell tray; 110, Receiving cavity; 300, Battery cell; 210, Inner liner plate; 220, Fixing plate; 211, Single airbag; 212, Sealed cavity; 213, Gas channel; 214, Air tube; 120, Guide rod; 130, Limiting mounting block; 230, Inner liner support block; 232, Limiting rib; 233, Movable groove; 240, Heating element; 140, Probe-type resistance thermometer; 216, Vent hole; 217, Airbag pressure strip. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] Please see Figures 1 to 6 This utility model proposes a cell restraint assembly, which is used in cell restraint devices.

[0040] The battery cell restraint assembly includes multiple fixing plates 220 and at least one inner liner plate 210, with the fixing plates 220 spaced apart. At least one inner liner plate 210 is disposed between every two adjacent fixing plates 220, and the inner liner plate 210 and the fixing plates 220 are used to clamp the battery cell 300. Single airbags 211 are respectively disposed on both sides of the inner liner plate 210, and the single airbags 211 cover the inner liner plate 210 to form a sealed cavity 212. 10 has a gas channel 213, which connects to the sealed cavities 212 on both sides. The inner liner 210 is connected to a gas tube 214 at the port of the gas channel 213. When gas is filled into the gas tube 214, the single air bladders 211 on both sides of the inner liner 210 expand, and the battery cell 300 is constrained between the corresponding single air bladder 211 and the fixing plate 220. When gas is extracted from the gas tube 214, the single air bladders 211 on both sides of the inner liner 210 contract.

[0041] Specifically, the battery cell 300 can be rectangular or other shapes. The inner liner plate 210 and the fixing plate 220 can be manufactured from molded parts, which facilitates mass production and reduces manufacturing costs. One or two inner liner plates 210 can be placed between each pair of adjacent fixing plates 220, depending on the requirements, as long as the restraint effect on the battery cell 300 is guaranteed. The air tube 214 can be connected to an external device for supplying gas. In use, the single air bag 211 retracts onto the inner liner plate 210. At this time, the battery cell 300 can be placed between the fixing plate 220 and the inner liner plate 210. The number of battery cells 300 can be single or multiple, depending on the actual situation. When it is necessary to restrain the battery cell 300, gas is introduced into the air tube 214. The gas can enter the sealed cavity 212 through the gas channel 213. The expansion of the sealed cavity 212 causes the single airbag 211 to expand, which in turn directly compresses the battery cell 300 against the fixing plate 220. At this time, one side of the battery cell 300 is compressed by the single airbag 211, and the other side is compressed by the fixing plate 220, thus restraining the battery cell 300 and preventing deformation. When the battery cell 300 needs to be released, the external device extracts the gas from the sealed cavity 212 through the air tube 214. The single airbag 211 contracts to release the restraint. There is a gap between the single airbag 211 and the fixing plate 220, at which point the battery cell 300 can be removed. With this configuration, by simply inflating or deflating the air tube 214 of the inner liner 210, the expansion or contraction of the single air bladders 211 on both sides can be controlled simultaneously, directly confining the battery cell 300 between the single air bladder 211 of the inner liner 210 and the fixing plate 220. Compared with the traditional method of setting air bladders and connecting air tubes 214 to each inner liner 210 and fixing plate 220, this effectively reduces the number of air tubes 214, simplifies the air path, makes the appearance cleaner, and reduces manufacturing costs.

[0042] Please see Figures 1 to 6 Furthermore, multiple inner liner plates 210 and multiple fixing plates 220 are arranged in an alternating pattern. Thus, there is an inner liner plate 210 between every two adjacent fixing plates 220. When the single air bladders 211 on both sides of an inner liner plate 210 inflate, the battery cell 300 can be squeezed onto the fixing plate 220, so that the single air bladders 211 can restrain the battery cell 300 and ensure the production quality of the battery cell 300.

[0043] Please see Figures 3 to 6Furthermore, the inner liner 210 is perforated to form ventilation holes 216, with both ends of the ventilation holes 216 connected to the sealed cavities 212 on both sides, and the ventilation holes 216 are connected to the gas channels 213. The ventilation holes 216 of the inner liner 210 are directly connected to the sealed cavities 212, allowing gas to enter the ventilation holes 216 through the gas channels 213 and then flow into the sealed cavities 212. The sealed cavities 212 inflate, allowing the single airbag 211 to compress the battery cell 300, ensuring the restraint effect of the battery cell 300. In this way, by ventilating one gas channel 213, the air pressure of the two sealed cavities 212 can be synchronously controlled, resulting in a simple structure that is easy to control.

[0044] Please see Figures 4 to 5 Furthermore, the shape of the single airbag 211 is rectangular or square. Thus, the shape of the single airbag 211 can be set according to the shape of the battery cell 300. The single airbag 211 should be consistent with the shape of the battery cell 300. For example, if the battery cell 300 is a cuboid, then the single airbag 211 should be rectangular. This ensures the restraining effect of the single airbag 211 on the battery cell 300.

[0045] Please see Figures 4 to 5 Furthermore, the cell restraint assembly also includes an airbag pressure strip 217, which presses against the periphery of the individual airbag 211 and connects to the inner liner plate 210 to form a sealed cavity 212. Thus, the airbag pressure strip 217 applies pressure to the individual airbag 211, tightly pressing it against the inner liner plate 210, thereby forming a sealed cavity 212 between the individual airbag 211 and the inner liner plate 210. This ensures airtightness during inflation or deflation, guaranteeing the stability of cell 300 restraint and de-restraint.

[0046] Please see Figures 4 to 6 To further ensure the stability of the single airbag 211 connected to the inner liner 210, the periphery of the single airbag 211 is further glued to the inner liner 210. This ensures both the airtightness of the connection between the single airbag 211 and the inner liner 210 and the stability of the connection.

[0047] Please see Figures 4 to 6 Furthermore, the airbag pressure strip 217 and the single airbag 211 are screwed onto the inner liner plate 210. Specifically, the airbag pressure strip 217 is pressed and connected to the connecting frame strip of the single airbag 211 by bolts, which is simple to assemble, ensures the stability of the single airbag 211 assembly structure, and has high assembly efficiency.

[0048] Please see Figures 1 to 6This utility model also proposes a battery cell restraint tray, which includes a battery cell tray 100 and a plurality of battery cell restraint components. The battery cell tray 100 is provided with a receiving cavity 110; the restraint components are disposed within the receiving cavity 110. The specific structure of the battery cell restraint components refers to all the above embodiments. Since this battery cell restraint tray adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0049] Please see Figures 1 to 2 Furthermore, multiple guide rods 120 are fixedly connected to both sides of the cell tray 100, and a fixed plate 220 is fixedly connected to the guide rods 120. The inner liner plate 210 is movably connected to the guide rods 120. Specifically, the fixed plate 220 is stationary, while the guide rods 120 can move between adjacent fixed plates 220. The reaction force of the fixed plate 220 on the individual airbags 211 and the inner liner plate 210 adjusts the movement of the inner liner plate 210 to accommodate cell 300s with dimensional deviations. The guide rods 120 guide the movement of the inner liner plate 210, ensuring that each inner liner plate 210 can move in a straight line, guaranteeing a uniform pressure effect on the cell 300 by the individual airbags 211 on both sides of each inner liner plate 210.

[0050] Please see Figures 1 to 2 Furthermore, the fixing plate 220 is screwed to the guide rod 120. Specifically, the fixing plate 220 is directly fixed to the guide rod 120, so that the fixing plate 220 is fixed and the distance between two adjacent fixing plates 220 is fixed. The distance between the inner liner plate 210 can be adjusted by the expansion of the single air bladder 211 on the inner liner plate 210, which is compatible with different sizes of battery cells 300.

[0051] Please see Figures 1 to 5 Furthermore, a limiting mounting block 130 is provided between the airbag inner liner 210 and the fixing plate 220. The limiting mounting block 130 is used to support the battery cell 300. The inner liner 210 has multiple connecting screw holes, and the limiting mounting block 130 is screwed onto the inner liner 210. By screwing the limiting mounting block 130 onto the inner liner 210, the limiting mounting block 130 is fixedly connected to the inner liner 210, thereby ensuring the stability of the installation position of the limiting mounting block 130 and thus ensuring the accuracy of the battery cell 300's positioning.

[0052] Please see Figures 1 to 5Furthermore, the cell tray 100 is provided with an inner lining support block 230. An inner lining plate 210 and a fixing plate 220 are supported on the inner lining support block 230. Two limiting ribs 232 protrude from the inner lining support block 230, defining a movable groove 233 between the two limiting ribs 232. The inner lining plate 210 is located within the movable groove 233 and can move within it. Thus, when it is necessary to remove the cell 300, the single airbag 211 contracts, allowing the inner lining plate 210 to move within a certain range, facilitating the removal of the cell 300. Simultaneously, when compatibility with different sized cells 300 is required, the position of the inner lining plate 210 can be finely adjusted to accommodate different sized cells 300, maintaining the pressure of the single airbag 211 on the cell 300 within a suitable range.

[0053] Please see Figures 4 to 5 Furthermore, the battery cell restraint tray also includes multiple heating elements 240. Two heating elements 240 are respectively located on opposite sides of the fixing plate 220. Each individual airbag 211 has a heating element 240 on the side facing away from the inner liner plate 210. Each heating element 240 is attached to the corresponding battery cell 300. Specifically, the heating elements 240 directly contact the battery cell 300 to heat it, ensuring the battery cell 300 is within a suitable temperature range and guaranteeing the production quality of the battery cell 300.

[0054] Please see Figures 4 to 5 Furthermore, a probe-type thermistor 140 is embedded in the limiting mounting block 130, which is used to detect the temperature of the limiting mounting block 130. Thus, by measuring the temperature of the limiting mounting block 130 through the probe-type thermistor 140, the temperature of the battery cell 300 is tested to determine if it is within the normal range, so that the heating element 240 can adjust the heating temperature and ensure that the heating element 240 can control the temperature of the battery cell 300.

[0055] The above are merely optional embodiments of this utility model and do not limit the patent scope of this utility model. All equivalent structural transformations made based on the contents of this utility model specification and drawings under the utility model concept, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A cell restraint assembly, characterized in that, The cell restraint assembly includes: Multiple fixing plates are arranged at intervals between them; At least one inner liner plate is provided between each two adjacent fixing plates, and the inner liner plate and the fixing plate are used to clamp the battery cell. The inner lining plate is provided with single airbags on both sides, and the single airbags cover the inner lining plate to form a sealed cavity. The inner lining plate has gas channels that connect the sealed cavities on both sides. The inner lining plate is connected to an air pipe at the port of the gas channel. When gas is introduced into the trachea, the single-piece airbags on both sides of the inner liner expand, and the battery cell is constrained between the corresponding single-piece airbag and the fixing plate; when gas is extracted from the trachea, the single-piece airbags on both sides of the inner liner contract.

2. The cell restraint assembly as described in claim 1, characterized in that, The multiple inner lining plates and the multiple fixing plates are arranged in an alternating pattern.

3. The cell restraint assembly as described in claim 1, characterized in that, The inner lining plate is perforated to form ventilation holes, and the two ends of the ventilation holes are respectively connected to the sealed cavities on both sides, and the ventilation holes are connected to the gas channels.

4. The cell restraint assembly as described in claim 1, characterized in that, The shape of the single airbag is rectangular or square.

5. The cell restraint assembly as described in claim 1, characterized in that, The cell restraint assembly also includes an airbag pressure strip, which presses against the periphery of the single airbag and connects to the inner liner plate to form the sealed cavity.

6. The cell restraint assembly as described in claim 5, characterized in that, The periphery of the single airbag is glued to the inner lining plate.

7. The cell restraint assembly as described in claim 6, characterized in that, The airbag pressure strip and the single airbag are screwed to the inner liner plate.

8. A battery cell restraint tray, characterized in that, The cell restraint tray includes: A battery cell tray, wherein the battery cell tray is provided with a receiving cavity; The cell restraint assembly as claimed in any one of claims 1 to 7, wherein the restraint assembly is disposed within the receiving cavity.

9. The cell restraint tray as described in claim 8, characterized in that, Multiple guide rods are fixedly connected to both sides of the battery cell tray, the fixed plate is fixedly connected to the guide rods, and the inner liner plate is movably connected to the guide rods.

10. The cell restraint tray as described in claim 9, characterized in that, The cell tray is provided with an inner lining support block. The inner lining plate and the fixing plate are supported on the inner lining support block. Two limiting ribs are protruding on the inner lining support block. A movable groove is defined between the two limiting ribs. The inner lining plate is disposed in the movable groove and can move within the movable groove.

11. The cell restraint tray as described in claim 9, characterized in that, The fixing plate is screwed onto the guide rod.

12. The cell restraint tray as described in claim 8, characterized in that, A limiting mounting block is provided between the inner liner plate and the fixing plate. The limiting mounting block is used to support the battery cell and is screwed to the inner liner plate.

13. The cell restraint tray as described in claim 8, characterized in that, The battery cell restraint tray also includes multiple heating elements, with each pair of heating elements respectively located on both sides of the fixing plate. Each single airbag has a heating element on the side opposite to the inner liner plate, and each heating element is attached to the corresponding battery cell.

14. The cell restraint tray as described in claim 12, characterized in that, The limiting mounting block is embedded with a probe-type thermal resistor, which is used to detect the temperature of the limiting mounting block.

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