CN218919022U - End plate assembly and lithium battery module - Google Patents

Abstract

The utility model discloses an end plate assembly and a lithium battery module, and relates to the technical field of lithium batteries. The end plate assembly includes a first end plate, a sliding plate, an elastic member, and a pressure sensor. The holding groove has been seted up to first terminal plate, and the sliding plate sets up in the holding inslot, and can follow the depth direction in holding groove for first terminal plate slip, and pressure sensor installs in the diapire of holding groove, and the one end and the pressure sensor of elastic component are connected, and the other end is connected with the sliding plate, and one side that the elastic component was kept away from to the sliding plate is used for laminating with the electric core to set up, and the elastic component is used for taking place compression set under the drive of sliding plate when the electric core expands to the holding inslot to make pressure sensor detect the expansion force of electric core in real time. The end plate assembly provided by the utility model can reserve a space for expanding the power supply so as to ensure the electrical performance of the battery cell, can detect the expansion force of the battery cell in real time, prevents the battery cell from being damaged and improves the safety.

Description

End plate assembly and lithium battery module

Technical Field

The utility model relates to the technical field of lithium batteries, in particular to an end plate assembly and a lithium battery module.

Background

At present, a lithium ion battery is usually used in a module mode, in the use process, because an electrode plate expands, the expansion force of the whole lithium battery module is increased synchronously, the electric performance and the safety of the lithium battery module are deteriorated due to the increased expansion force, and when the expansion force is large enough to open an explosion-proof valve, the lithium battery module is possibly damaged, and even a safety accident is caused.

In view of this, it is important to design and manufacture an end plate assembly with high safety and a lithium battery module, especially in the production of lithium batteries.

Disclosure of Invention

The utility model aims to provide an end plate assembly, which can reserve a space for expanding a power supply core so as to ensure the electrical property of the power supply core, detect the expansion force of the power supply core in real time, prevent the power supply core from being damaged and improve the safety.

The utility model further aims to provide a lithium battery module which can reserve a space for expanding a power core so as to ensure the electrical property of the power core, detect the expansion force of the power core in real time, prevent the power core from being damaged and improve the safety.

The utility model is realized by adopting the following technical scheme.

The utility model provides an end plate subassembly, including first end plate, the sliding plate, elastic component and pressure sensor, the storage tank has been seted up to first end plate, the sliding plate sets up in the storage tank, and can follow the depth direction in storage tank for first end plate slip, pressure sensor installs in the diapire of storage tank, the one end and the pressure sensor of elastic component are connected, the other end is connected with the sliding plate, one side that the elastic component was kept away from to the sliding plate is used for laminating with the electric core setting, the elastic component is used for taking place compression set under the drive of sliding plate when the electric core expands to the storage tank, so that pressure sensor detects the expansion force of electric core in real time.

Optionally, the first end plate includes end plate body and week curb plate, and the edge of end plate body is located to week curb plate, and with end plate body fixed connection, end plate body and week curb plate enclose into the storage tank jointly, sliding plate and week curb plate sliding fit, and pressure sensor installs on end plate body.

Optionally, week curb plate includes first curb plate, second curb plate, third curb plate and fourth curb plate of end to end, and first curb plate, second curb plate, third curb plate and fourth curb plate all fixed connection are on the end plate body, and the sliding plate is provided with first lateral wall, second lateral wall, third lateral wall and the fourth lateral wall of end to end, first lateral wall and first curb plate sliding fit, second lateral wall and second curb plate sliding fit, third lateral wall and third curb plate sliding fit, fourth lateral wall and fourth curb plate sliding fit.

Optionally, the first side plate is provided with a first sliding guide structure, the first side wall is provided with a second sliding guide structure, and the first sliding guide structure is matched with the second sliding guide structure.

Optionally, the first sliding guide structure is a sliding groove, the second sliding guide structure is a sliding block, the sliding groove extends along the depth direction of the accommodating groove, and the sliding block is slidably arranged in the sliding groove.

Optionally, the quantity of elastic component and pressure sensor is a plurality of, and a plurality of pressure sensor interval sets up in the storage tank, and every pressure sensor is connected with an elastic component.

Optionally, the holding groove is offered in the middle part of first end plate, and the sliding plate is used for laminating the setting with the middle part of electric core.

Optionally, the end plate assembly further includes a controller and an alarm, the pressure sensor is electrically connected with the controller, the controller is electrically connected with the alarm, the pressure sensor is used for sending the expansion force of the battery cell to the controller, and the controller is used for comparing the expansion force with a preset safety limit expansion force and controlling the alarm to give an alarm when the expansion force is greater than or equal to the preset safety limit expansion force.

Optionally, the end plate assembly further includes a second end plate disposed opposite the first end plate, the battery cell is disposed between the second end plate and the first end plate, and the second end plate is configured to be attached to the battery cell.

The utility model provides a lithium battery module, including foretell end plate assembly, this end plate assembly includes first end plate, the sliding plate, elastic component and pressure sensor, the storage tank has been seted up to first end plate, the sliding plate sets up in the storage tank, and can follow the depth direction in storage tank for first end plate slip, pressure sensor installs in the diapire in storage tank, the one end and the pressure sensor of elastic component are connected, the other end is connected with the sliding plate, one side that the elastic component was kept away from to the sliding plate is used for laminating with the electric core and sets up, the elastic component is used for taking place compression set under the drive of sliding plate when the electric core expands to make pressure sensor detect the expansive force of electric core in real time.

The end plate assembly and the lithium battery module provided by the utility model have the following beneficial effects:

according to the end plate assembly provided by the utility model, the accommodating groove is formed in the first end plate, the sliding plate is arranged in the accommodating groove and can slide relative to the first end plate along the depth direction of the accommodating groove, the pressure sensor is arranged on the bottom wall of the accommodating groove, one end of the elastic piece is connected with the pressure sensor, the other end of the elastic piece is connected with the sliding plate, one side of the sliding plate, which is far away from the elastic piece, is used for being attached to the battery cell, and the elastic piece is used for being compressed and deformed under the driving of the sliding plate when the battery cell expands into the accommodating groove, so that the pressure sensor can detect the expansion force of the battery cell in real time. Compared with the prior art, the end plate assembly provided by the utility model has the advantages that the sliding plate arranged in the accommodating groove in a sliding way and the pressure sensor connected with the sliding plate through the elastic piece are adopted, so that the reserved space can expand the power supply core, the electric performance of the power supply core is ensured, the expansion force of the power supply core can be detected in real time, the damage of the power supply core is prevented, and the safety is improved.

The lithium battery module provided by the utility model comprises the end plate assembly, a space can be reserved for expanding the battery core so as to ensure the electrical property of the battery core, the expansion force of the battery core can be detected in real time, the battery core is prevented from being damaged, and the safety is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a lithium battery module according to a first embodiment of the present utility model;

FIG. 2 is a block diagram of the structural components of an endplate assembly according to a first embodiment of the present utility model;

FIG. 3 is a schematic view showing a sliding plate slidably engaged with a first end plate in an end plate assembly according to a first embodiment of the present utility model;

FIG. 4 is a schematic view of an end plate assembly according to another embodiment of the present utility model from another perspective, wherein the sliding plate is slidably engaged with the first end plate;

fig. 5 is a schematic structural view of a sliding plate slidably engaged with a first end plate in an end plate assembly according to a second embodiment of the present utility model.

Icon: 10-lithium battery module; a 100-end plate assembly; 110-a first end plate; 111-a receiving groove; 112-an end plate body; 113-peripheral side plates; 114-a first side plate; 1141-a first slide guiding structure; 115-a second side panel; 116-a third side panel; 117-fourth side panel; 120-a second end plate; 130-a sliding plate; 131-a first sidewall; 1311-a second slide guiding structure; 132-a second sidewall; 133-a third sidewall; 134-fourth side wall; 140-elastic members; 150-a pressure sensor; 160-a controller; 170-an alarm; 200-cell.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "inner", "outer", "upper", "lower", "horizontal", etc., are directions or positional relationships based on those shown in the drawings, or those that are conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," "mounted," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Some embodiments of the present utility model are described in detail below with reference to the accompanying drawings. Features of the embodiments described below may be combined with each other without conflict.

First embodiment

Referring to fig. 1 and 2 in combination, a lithium battery module 10 is provided in an embodiment of the utility model for realizing a power supply function. The electric core 200 can be expanded in a reserved space to ensure the electric performance of the electric core 200, and the expansion force of the electric core 200 can be detected in real time, so that the electric core 200 is prevented from being damaged, and the safety is improved.

It is noted that the lithium battery module 10 includes an end plate assembly 100 and a plurality of battery cells 200. The multiple electric cores 200 are sequentially connected and are all installed in the end plate assembly 100, the end plate assembly 100 is used for limiting and fixing the multiple electric cores 200, and the multiple electric cores 200 are used together to achieve a power supply function. Specifically, the plurality of electric cores 200 are arranged side by side, two adjacent electric cores 200 are arranged in a lamination manner, and two electric cores 200 positioned at the end are respectively connected with two sides of the end plate assembly 100.

The endplate assembly 100 includes a first endplate 110, a second endplate 120, a sliding plate 130, a resilient member 140, a pressure sensor 150, a controller 160, and an alarm 170. The first end plate 110 is provided with the accommodating groove 111, the shape of the sliding plate 130 is matched with the shape of the accommodating groove 111, the sliding plate 130 is arranged in the accommodating groove 111 and can slide relative to the first end plate 110 along the depth direction of the accommodating groove 111, the sliding plate 130 is used for being attached to the battery cell 200, and the battery cell 200 can drive the sliding plate 130 to slide in the accommodating groove 111 when expanding so as to achieve the abdication of the battery cell 200, thereby achieving the function of expanding the reserved space power supply core 200 and guaranteeing the electrical property of the battery cell 200. The pressure sensor 150 is installed in the diapire of holding groove 111, and the one end and the pressure sensor 150 of elastic component 140 are connected, and the other end is connected with sliding plate 130, and the one side that sliding plate 130 kept away from elastic component 140 is used for laminating with electric core 200 and sets up, and elastic component 140 is used for taking place compression set under the drive of sliding plate 130 when electric core 200 expands to holding groove 111 to make pressure sensor 150 detects the expansion force of electric core 200 in real time, prevent electric core 200 damage, improve the security.

The second end plate 120 is disposed opposite to the first end plate 110, the battery cell 200 is disposed between the second end plate 120 and the first end plate 110, and the second end plate 120 is disposed in a manner of being attached to the battery cell 200. Specifically, the plurality of electric cores 200 are disposed between the sliding plate 130 and the second end plate 120, one electric core 200 at one end is disposed in contact with the sliding plate 130, and the other electric core 200 at the other end is disposed in contact with the second end plate 120, and since the second end plate 120 has a conventional plate-like structure, the electric core 200 cannot expand in a direction approaching to the second end plate 120, and therefore the electric core 200 can only deform in a direction approaching to the sliding plate 130 when expanding, so as to push the sliding plate 130 to slide in the accommodating groove 111.

Further, the pressure sensor 150 is electrically connected to the controller 160, the controller 160 is electrically connected to the alarm 170, the pressure sensor 150 is configured to send the expansion force of the battery cell 200 to the controller 160, the controller 160 is configured to compare the expansion force with a preset safety limit expansion force, and control the alarm 170 to send an alarm when the expansion force is greater than or equal to the preset safety limit expansion force, so as to alert a user that the expansion force of the battery cell 200 is too large, and maintenance or replacement is required, thereby avoiding damage to the battery cell 200 and occurrence of a safety accident.

Referring to fig. 3 and 4 in combination, the first end plate 110 includes an end plate body 112 and a peripheral side plate 113. The peripheral plate 113 is disposed around the edge of the end plate body 112 and is fixedly connected to the end plate body 112. The end plate body 112 and the peripheral side plate 113 together enclose a containing groove 111, the sliding plate 130 encloses the sliding plate 130, the sliding plate 130 is in sliding fit with the peripheral side plate 113, and the pressure sensor 150 is mounted on the end plate body 112 so as to realize the function of detecting the expansion force of the battery cell 200.

Notably, the end plate body 112, the peripheral side plate 113, and the sliding plate 130 are rectangular. The peripheral side panel 113 includes a first side panel 114, a second side panel 115, a third side panel 116 and a fourth side panel 117 connected end to end. The first side plate 114, the second side plate 115, the third side plate 116 and the fourth side plate 117 are fixedly connected to the end plate body 112. The sliding plate 130 is provided with a first side wall 131, a second side wall 132, a third side wall 133 and a fourth side wall 134 connected end to end. The first side wall 131 is slidably matched with the first side plate 114, the second side wall 132 is slidably matched with the second side plate 115, the third side wall 133 is slidably matched with the third side plate 116, and the fourth side wall 134 is slidably matched with the fourth side plate 117, so that the sliding process of the sliding plate 130 is stable and reliable.

Further, the first side plate 114 is provided with a first sliding guide structure 1141, the first side wall 131 is provided with a second sliding guide structure 1311, and the first sliding guide structure 1141 is matched with the second sliding guide structure 1311, so as to further improve the stability of sliding fit between the sliding plate 130 and the peripheral side plate 113, and prevent the sliding plate 130 from deflecting or tilting during the sliding process.

In this embodiment, the first guiding and sliding structure 1141 is a sliding groove, the second guiding and sliding structure 1311 is a sliding block, the sliding groove extends along the depth direction of the accommodating groove 111, the sliding block is slidably disposed in the sliding groove, the sliding block can slide relative to the sliding groove, and the sliding groove can guide and limit the sliding block, so as to guide and limit the sliding plate 130, and ensure the sliding stability of the sliding plate 130. However, the present utility model is not limited thereto, and in other embodiments, the first sliding guide structure 1141 may be a sliding table, and the second sliding guide structure 1311 may be a through slot, where the sliding table is slidably disposed in the through slot, so as to implement the guiding and limiting functions of the sliding plate 130.

Correspondingly, the second side plate 115 is provided with a third sliding guiding structure (not shown), the second side wall 132 is provided with a fourth sliding guiding structure (not shown), and the third sliding guiding structure is matched with the fourth sliding guiding structure; the third side plate 116 is provided with a fifth sliding guide structure (not shown), the third side wall 133 is provided with a sixth sliding guide structure (not shown), and the fifth sliding guide structure is matched with the sixth sliding guide structure; the fourth side plate 117 is provided with a seventh slide guiding structure (not shown), the fourth side wall 134 is provided with an eighth slide guiding structure (not shown), and the seventh slide guiding structure is matched with the eighth slide guiding structure; in this way, the peripheral plate 113 can simultaneously perform sliding guiding and limiting on the periphery of the sliding plate 130, so as to further improve the sliding stability of the sliding plate 130.

It should be noted that, the number of the elastic members 140 and the number of the pressure sensors 150 are plural, the plurality of pressure sensors 150 are disposed in the accommodating groove 111 at intervals, each pressure sensor 150 is connected to one elastic member 140, and the plurality of elastic members 140 are simultaneously connected to the sliding plate 130. Specifically, the plurality of elastic members 140 are spaced apart from each other at different positions of the sliding plate 130, and the elastic members 140 can be compressed by the sliding plate 130 regardless of the position of the battery cell 200, thereby realizing an expansion force detection function by the pressure sensor 150.

In this embodiment, the elastic member 140 is a spring, and the elastic member 140 is always in a compressed state, so as to improve the reliability and accuracy of the detection of the expansion force. However, the present utility model is not limited thereto, and in other embodiments, the elastic member 140 may be rubber, and the material of the elastic member 140 is not particularly limited.

According to the end plate assembly 100 provided by the embodiment of the utility model, the first end plate 110 is provided with the accommodating groove 111, the sliding plate 130 is arranged in the accommodating groove 111 and can slide relative to the first end plate 110 along the depth direction of the accommodating groove 111, the pressure sensor 150 is arranged on the bottom wall of the accommodating groove 111, one end of the elastic piece 140 is connected with the pressure sensor 150, the other end of the elastic piece 140 is connected with the sliding plate 130, one side of the sliding plate 130 far away from the elastic piece 140 is used for being attached to the battery cell 200, and the elastic piece 140 is used for being compressed and deformed under the drive of the sliding plate 130 when the battery cell 200 expands into the accommodating groove 111, so that the pressure sensor 150 detects the expansion force of the battery cell 200 in real time. Compared with the prior art, the end plate assembly 100 provided by the utility model adopts the sliding plate 130 arranged in the accommodating groove 111 in a sliding way and the pressure sensor 150 connected with the sliding plate 130 through the elastic piece 140, so that the reserved space can be used for expanding the power supply core 200 to ensure the electrical performance of the power supply core 200, the expansion force of the power supply core 200 can be detected in real time, the damage of the power supply core 200 is prevented, and the safety is improved. So that the lithium battery module 10 has strong durability, safety and reliability.

Second embodiment

Referring to fig. 5, the embodiment of the utility model provides a lithium battery module 10, which is different from the first embodiment in the structure of the first end plate 110 and the number of the elastic members 140 and the pressure sensors 150.

In this embodiment, the first end plate 110 is no longer composed of a plurality of plates joined together, but is provided in the shape of an overall thick plate. The accommodating groove 111 is formed in the middle of the first end plate 110, and the sliding plate 130 is configured to be attached to the middle of the battery cell 200. The number of the elastic members 140 and the number of the pressure sensors 150 are one, the pressure sensors 150 are arranged in the middle of the bottom wall of the accommodating groove 111, and the pressure sensors 150 are connected with the middle of the sliding plate 130 through the elastic members 140. Specifically, in the process of expanding the battery cell 200, the expansion deformation of the middle part of the battery cell 200 is generally the largest, so in this embodiment, only the middle part expansion of the battery cell 200 is abducted and the expansion force is detected, so that the use of the elastic member 140 and the pressure sensor 150 can be reduced, and the cost is saved.

The beneficial effects of the end plate assembly 100 provided in the embodiment of the present utility model are the same as those of the first embodiment, and will not be described here again.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. The utility model provides an end plate subassembly, its characterized in that includes first end plate, sliding plate, elastic component and pressure sensor, the storage tank has been seted up to first end plate, the sliding plate set up in the storage tank, and can follow the depth direction of storage tank for first end plate slides, pressure sensor install in the diapire of storage tank, the one end of elastic component with pressure sensor connects, the other end with the sliding plate is connected, the sliding plate keep away from one side of elastic component is used for laminating with the electric core and sets up, the elastic component is used for the electric core to when expanding in the storage tank take place compression set under the drive of sliding plate, so that pressure sensor detects in real time the expansion force of electric core.

2. The endplate assembly of claim 1, wherein the first endplate includes an endplate body and a peripheral side plate that surrounds the edge of the endplate body and is fixedly connected with the endplate body, the endplate body and the peripheral side plate together surrounding the receiving slot, the sliding plate is in sliding engagement with the peripheral side plate, and the pressure sensor is mounted on the endplate body.

3. The endplate assembly of claim 2, wherein the peripheral side plate includes first, second, third, and fourth end-to-end side plates, the first, second, third, and fourth side plates each fixedly connected to the endplate body, the slide plate is provided with first, second, third, and fourth end-to-end side walls, the first side wall is in sliding engagement with the first side plate, the second side wall is in sliding engagement with the second side plate, the third side wall is in sliding engagement with the third side plate, and the fourth side wall is in sliding engagement with the fourth side plate.

4. An end plate assembly according to claim 3, wherein the first side plate is provided with a first slide guiding structure and the first side wall is provided with a second slide guiding structure, the first slide guiding structure cooperating with the second slide guiding structure.

5. The end plate assembly of claim 4, wherein the first slide guiding structure is a sliding groove, the second slide guiding structure is a sliding block, the sliding groove extends along a depth direction of the accommodating groove, and the sliding block is slidably arranged in the sliding groove.

6. The endplate assembly of claim 1, wherein the number of said resilient members and said pressure sensors are each plural, and wherein the plural pressure sensors are disposed in said receiving recess at intervals, each of said pressure sensors being connected to one of said resilient members.

7. The end plate assembly of claim 1, wherein the receiving groove is formed in a middle portion of the first end plate, and the sliding plate is configured to be attached to a middle portion of the battery cell.

8. The endplate assembly of claim 1, further comprising a controller and an alarm, wherein the pressure sensor is electrically connected to the controller, the controller is electrically connected to the alarm, the pressure sensor is configured to send the expansion force of the electrical cell to the controller, and the controller is configured to compare the expansion force with a preset safety limit expansion force and control the alarm to sound an alarm when the expansion force is greater than or equal to the preset safety limit expansion force.

9. The end plate assembly of claim 1, further comprising a second end plate disposed opposite the first end plate, the cell disposed between the second end plate and the first end plate, the second end plate configured to be disposed in conforming relationship with the cell.

10. A lithium battery module comprising an end plate assembly according to any one of claims 1 to 9.

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