Battery cell box and battery pack

Abstract

The utility model provides a battery cell box and a battery pack, and belongs to the technical field of battery manufacturing. The battery cell box top plate is connected with the battery cell box bottom plate, and a box body cavity is formed between the battery cell box bottom plate and the battery cell box top plate; the number of the battery cells is at least two, and each battery cell is located in the box body cavity; each clamping plate is located between every two adjacent battery cells, and each clamping plate comprises a clamping plate bottom layer, a clamping plate top layer and a clamping plate middle layer. The battery cell box has the beneficial effects that under the action of the clamping plate formed by compounding the clamping plate bottom layer, the clamping plate top layer and the clamping plate middle layer, the battery cell box can replace a pressing plate to provide larger battery cell expansion constraining force in the battery cell expansion process, so that the battery cell is prevented from being excessively expanded, and the safety life of the battery cell is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of battery manufacturing technology and relates to a cell box and a battery pack. Background Technology

[0002] In current battery pack designs, cells are typically arranged in a stacked manner, with a pressure plate on top to apply pressure and prevent damage from thermal expansion during charge-discharge cycles. However, this pressure plate is insufficient to provide adequate support for cell expansion, making it difficult to guarantee cell lifespan and leaving considerable room for improvement. Utility Model Content

[0003] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a cell box and a battery pack.

[0004] The objective of this utility model can be achieved through the following technical solution: a battery cell box, comprising:

[0005] Battery cell bottom plate;

[0006] A top plate of the battery cell box is connected to a bottom plate of the battery cell box, and a cell box cavity is formed between the bottom plate of the battery cell box and the top plate of the battery cell box;

[0007] The battery cell is at least two, and each of the battery cells is located in the housing cavity;

[0008] A clamping plate is located between two adjacent battery cells. The clamping plate includes a bottom clamping plate, a top clamping plate, and a middle clamping plate. The middle clamping plate is located between the bottom clamping plate and the top clamping plate. The bottom clamping plate is in contact with one battery cell, the top clamping plate is in contact with the other battery cell, and the two ends of the middle clamping plate are in contact with the bottom clamping plate and the top clamping plate, respectively. The middle clamping plate is an elastic element.

[0009] In the aforementioned battery cell box, the bottom layer of the clamping plate is a heat insulation component, the top layer of the clamping plate is a heat insulation component, and the middle layer of the clamping plate is a heat-conducting component.

[0010] In one of the aforementioned battery cell boxes, the top layer of the clamping plate has a "U"-shaped structure, thus forming a clamping plate groove, and the middle layer of the clamping plate is located in the clamping plate groove.

[0011] In one of the aforementioned battery cell cases, the bottom layer of the clamping plate is bonded to both ends of the top layer of the clamping plate.

[0012] In one of the aforementioned battery cell cases, the height of the middle layer of the clamping plate in its natural state is greater than the depth of the clamping plate groove, and the middle layer of the clamping plate is in a compressed state when located in the clamping plate groove.

[0013] In one of the aforementioned battery cell boxes, the bottom layer of the clamping plate is bonded to the middle layer of the clamping plate, and the top layer of the clamping plate is bonded to the middle layer of the clamping plate.

[0014] The aforementioned cell box also includes a first partition, which is located between the cell box bottom plate and the cell.

[0015] In one of the aforementioned battery cell cases, the first partition is configured as the clamping plate.

[0016] The aforementioned cell box also includes a second partition, which is located between the top plate of the cell box and the cell.

[0017] In one of the aforementioned battery cell cases, the second partition is configured as a heat insulation component.

[0018] In the aforementioned battery cell box, the bottom plate of the battery cell box is a heat-conducting component, and the top plate of the battery cell box is a heat-conducting component.

[0019] Secondly, a battery pack, including the aforementioned cell box, further includes:

[0020] Battery pack housing;

[0021] A battery pack cover is connected to the battery pack housing, and a housing cavity is formed between the battery pack cover and the battery pack cover.

[0022] The battery cell box is disposed in the housing cavity.

[0023] In one of the above-mentioned battery packs, the cell box is bonded to the battery pack housing and / or the battery pack cover.

[0024] The battery pack described above also includes a liquid cooling plate, and the number of liquid cooling plates is at least two, with the cell box located between two adjacent liquid cooling plates.

[0025] In one of the aforementioned battery packs, the cell box is bonded to the liquid cooling plate.

[0026] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0027] 1. Under the action of the clamping plate composed of the bottom layer, top layer and middle layer of the clamping plate, the cell box can replace the pressure plate to provide a larger cell expansion constraint force during the cell expansion process, so as to prevent the cell from expanding excessively and improve the safe life of the cell.

[0028] 2. The bottom layer of the clamping plate is a heat insulation component, which mainly ensures that the fire does not spread after the battery cell catches fire. At the same time, it provides auxiliary support for the side of the battery cell box, increases the constraint force of the battery cell box on the battery cell when the battery cell expands, and improves the safe life of the battery cell.

[0029] 3. The top layer of the clamping plate is a heat-conducting component, which can provide heat conduction and heat dissipation for the large surface of the battery cell, while also providing auxiliary support for the side of the battery cell box, increasing the constraint force generated by the battery cell box on the battery cell when the battery cell expands, and improving the safe life of the battery cell.

[0030] 4. The middle layer of the sandwich plate is made of a material that can be compressed and rebound after being pressed. The compressibility can provide deformation space during the expansion process of the battery cell, ensuring the working life of the battery cell.

[0031] 5. The height of the middle layer of the plywood in its natural state is greater than the depth of the plywood groove. When the middle layer of the plywood is located in the plywood groove, it is in a compressed state. Therefore, after the middle layer of the plywood is installed, it can provide an initial pre-compression force to prevent the middle of the bottom layer and the top layer of the plywood from collapsing. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the battery cell box according to Embodiment 1 of this utility model.

[0033] Figure 2 This is an exploded view of the battery cell box according to Embodiment 1 of this utility model.

[0034] Figure 3 This is a schematic diagram of the clamping plate in Embodiment 1 of this utility model.

[0035] Figure 4 This is a schematic diagram of the clamping plate in Embodiment 2 of this utility model.

[0036] Figure 5 This is a schematic diagram of the battery pack structure of this utility model.

[0037] Figure 6 for Figure 5 A structural diagram from the perspective of AA.

[0038] Figure 7 for Figure 6 An enlarged view of part B.

[0039] In the diagram, 100 is the bottom plate of the cell box; 200 is the top plate of the cell box; 300 is the cell; 400 is the clamping plate; 410 is the bottom layer of the clamping plate; 420 is the top layer of the clamping plate; 430 is the middle layer of the clamping plate; 500 is the first partition; 600 is the second partition; 700 is the battery pack housing; 800 is the battery pack cover; and 900 is the liquid cooling plate. Detailed Implementation

[0040] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0041] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0042] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0043] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0044] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0045] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0046] Example 1

[0047] like Figures 1-3 As shown, a battery cell box includes: a battery cell box bottom plate 100, a battery cell box top plate 200, a battery cell 300, and a clamping plate 400.

[0048] The top plate 200 of the battery cell box is connected to the bottom plate 100 of the battery cell box, and a cell box cavity is formed between the bottom plate 100 and the top plate 200 of the battery cell box.

[0049] The number of battery cells 300 is at least two, and each of the battery cells 300 is located in the housing cavity.

[0050] The clamping plate 400 is located between two adjacent battery cells 300. The clamping plate 400 includes a bottom clamping plate 410, a top clamping plate 420, and a middle clamping plate 430. The middle clamping plate 430 is located between the bottom clamping plate 410 and the top clamping plate 420. The bottom clamping plate 410 is in contact with one battery cell 300, the top clamping plate 420 is in contact with the other battery cell 300, and the two ends of the middle clamping plate 430 are in contact with the bottom clamping plate 410 and the top clamping plate 420, respectively. The middle clamping plate 430 is an elastic element.

[0051] Specifically, the middle layer 430 of the clamping plate pushes the bottom layer 410 and the top layer 420 of the clamping plate away from each other, thereby providing a larger expansion constraint force for the battery cell 300.

[0052] In this embodiment, under the action of the clamping plate 400, which is composed of the bottom clamping plate 410, the top clamping plate 420, and the middle clamping plate 430, the cell box can replace the pressure plate to provide a larger expansion constraint force for the cell 300 during the expansion process, so as to prevent the cell 300 from expanding excessively and improve the safe life of the cell 300.

[0053] Based on the above embodiments, the bottom layer 410 of the clamping plate is a heat insulation component, which mainly ensures that the fire of the battery cell 300 does not spread after it catches fire. At the same time, it provides auxiliary support for the side of the battery cell box, increases the constraint force of the battery cell box on the battery cell 300 when the battery cell 300 expands, and improves the safe life of the battery cell 300.

[0054] Specifically, the bottom layer 410 of the plywood is a non-metallic component with a certain rigidity and fireproof and heat-insulating properties.

[0055] Based on the above embodiments, the top layer 420 of the clamping plate is a heat-conducting component, which can provide heat conduction and heat dissipation for the bottom surface of the battery cell 300, and at the same time provide auxiliary support for the side of the battery cell box, increase the constraint force of the battery cell box on the battery cell 300 when the battery cell 300 expands, and improve the safe life of the battery cell 300.

[0056] Specifically, the top layer 420 of the sandwich panel is a metal part with a certain rigidity and thermal conductivity.

[0057] Specifically, the middle layer 430 of the sandwich plate is made of a material that can be compressed and rebound after being pressed. The compressible property can provide deformation space during the expansion process of the battery cell 300, ensuring the working life of the battery cell 300.

[0058] More specifically, the middle layer 430 of the plywood can be foam.

[0059] like Figures 1-3 As shown, the top layer 420 of the clamping plate has a "U" shaped structure, thus forming a clamping plate groove, and the middle layer 430 of the clamping plate is located in the clamping plate groove.

[0060] In this embodiment, the clamping groove formed by the "U"-shaped structure of the top layer 420 of the clamping plate can more stably fix the middle layer 430 of the clamping plate to prevent it from shifting, thus ensuring the stability and safety of the battery cell 300 when subjected to external impact.

[0061] like Figures 1-3 As shown, the bottom layer 410 of the clamping plate is bonded to both ends of the top layer 420 of the clamping plate.

[0062] Specifically, the bottom layer 410 and the top layer 420 of the plywood can be connected by high-strength adhesive functional material components.

[0063] In this embodiment, the bottom layer 410 and the top layer 420 of the clamping plate are connected by adhesive bonding, which enhances the overall structural strength of the clamping plate 400, simplifies the manufacturing process, and reduces production costs.

[0064] like Figures 1-3 As shown, the height of the middle layer 430 of the clamping plate in its natural state is greater than the depth of the clamping plate groove, and the middle layer 430 of the clamping plate is in a compressed state when it is located in the clamping plate groove.

[0065] In this embodiment, the height of the middle layer 430 in its natural state is greater than the depth of the clamping groove. When the middle layer 430 is located in the clamping groove, it is in a compressed state. Therefore, after the middle layer 430 is installed, it can provide an initial pre-compression force to prevent the middle of the bottom layer 410 and the top layer 420 of the clamping plate from collapsing.

[0066] like Figures 1-3 As shown, it also includes a first partition 500, which is located between the cell box bottom plate 100 and the cell 300.

[0067] In this embodiment, the first partition 500 is located between the bottom plate 100 of the battery cell box and the battery cell 300, which serves to separate the bottom plate 100 of the battery cell box and the battery cell 300. This mainly ensures that the fire in the battery cell 300 does not spread, and at the same time provides auxiliary support for the sides and bottom of the battery cell box.

[0068] like Figures 1-3 As shown, the first partition 500 is configured as the clamping plate 400.

[0069] Specifically, the first partition 500 is a clamping plate 400. Therefore, the clamping plate 400 can be directly arranged as the first partition 500 between the cell box bottom plate 100 and the cell 300, with the bottom layer 410 of the clamping plate close to the cell box bottom plate 100 and the top layer 420 of the clamping plate close to the cell 300.

[0070] like Figures 1-3 As shown, it also includes a second partition 600, which is located between the top plate 200 of the cell box and the cell 300.

[0071] In this embodiment, the first partition 500 is located between the top plate 200 of the battery cell box and the battery cell 300, which serves to separate the top plate 200 of the battery cell box and the battery cell 300. This mainly ensures that the fire in the battery cell 300 does not spread, and at the same time provides auxiliary support for the sides and top of the battery cell box.

[0072] like Figures 1-3 As shown, the second partition 600 is configured as a heat insulation component.

[0073] Specifically, the second partition 600 is a combination component with heat insulation and pressure deformation function, which can prevent the temperature difference of the battery cell 300 from being too large.

[0074] like Figures 1-3 As shown, the bottom plate 100 of the battery cell box is a heat-conducting component, and the top plate 200 of the battery cell box is a heat-conducting component.

[0075] Specifically, the cell box bottom plate 100 and the cell box top plate 200 are both metal parts with certain rigidity and thermal conductivity, which can provide expansion constraint force for the cell 300, improve the safe life of the cell 300, and at the same time, their thermal conductivity can provide more efficient heat dissipation when the cell 300 is working.

[0076] Example 2

[0077] like Figure 4 As shown, the structure of this embodiment is basically the same as that of Embodiment 1. The difference is that the bottom layer 410 of the clamping plate is not directly bonded to the top layer 420 of the clamping plate. Instead, the bottom layer 410 of the clamping plate is bonded to the middle layer 430 of the clamping plate, and the top layer 420 of the clamping plate is bonded to the middle layer 430 of the clamping plate.

[0078] In this embodiment, there is no need to limit the height of the middle layer 430 of the clamping plate by bonding the bottom layer 410 and the top layer 420 of the clamping plate. Therefore, the height of the overall structure of the clamping plate 400 is adjustable and changes with the height of the middle layer 430 of the clamping plate, which can provide a larger deformation and expansion space for the battery cell 300.

[0079] Example 3

[0080] like Figures 5-7 As shown, a battery pack includes a cell box as described in Embodiment 1 or Embodiment 2, and further includes a battery pack housing 700 and a battery pack cover 800.

[0081] The battery pack housing 700 can be a one-piece structure or a detachable base plate and frame structure; similarly, the frame can be a one-piece structure or a detachable side plate structure.

[0082] The battery pack cover 800 is connected to the battery pack housing 700, and a housing cavity is formed between the battery pack cover 800 and the battery pack housing 700.

[0083] The battery cell box is disposed in the housing cavity.

[0084] In this embodiment, the cavity formed between the battery pack cover 800 and the battery pack cover 800 provides a space to accommodate multiple battery cell boxes.

[0085] like Figures 5-7 As shown, the cell box is bonded to the battery pack housing 700 and / or the battery pack cover 800.

[0086] Specifically, the cell box bottom plate 100 and the box bottom plate can be connected by high-strength adhesive functional materials to ensure that the two have good connection and firmness.

[0087] Specifically, the top plate 200 of the cell box and the battery pack cover 800 can be connected by a high-strength adhesive material, which can provide a certain rigidity to the top plate 200 of the cell box.

[0088] like Figures 5-7 As shown, it also includes a liquid cooling plate 900, and the number of liquid cooling plates 900 is at least two, with the cell box located between two adjacent liquid cooling plates 900.

[0089] In this embodiment, at least two liquid cooling plates 900 are provided and the cell box is placed between them, which can effectively enhance the cooling effect on the cell box in the battery pack, provide a larger heat dissipation area for the cell 300, improve heat dissipation efficiency, ensure that each cell 300 operates at the optimal operating temperature, and improve the overall performance and life of the battery pack.

[0090] like Figures 5-7 As shown, the battery cell box is bonded to the liquid cooling plate 900.

[0091] Specifically, the battery cell box and the liquid cooling plate 900 can be connected by a thermally conductive adhesive material.

[0092] In this embodiment, the cell box is connected to the liquid cooling plate 900 by adhesive bonding, which not only enhances the structural stability of the battery pack, but also helps to improve the efficiency of the cooling system and further optimizes the thermal management performance of the battery pack.

Claims

1. A battery cell box, characterized in that, include: Battery cell bottom plate; A top plate of the battery cell box is connected to a bottom plate of the battery cell box, and a cell box cavity is formed between the bottom plate of the battery cell box and the top plate of the battery cell box; The battery cell is at least two, and each of the battery cells is located in the housing cavity; A clamping plate is located between two adjacent battery cells. The clamping plate includes a bottom clamping plate, a top clamping plate, and a middle clamping plate. The middle clamping plate is located between the bottom clamping plate and the top clamping plate. The bottom clamping plate is in contact with one battery cell, the top clamping plate is in contact with the other battery cell, and the two ends of the middle clamping plate are in contact with the bottom clamping plate and the top clamping plate, respectively. The middle clamping plate is an elastic element.

2. A battery cell box as described in claim 1, characterized in that: The bottom layer of the clamping plate is a heat insulation component, and the top layer of the clamping plate is a heat-conducting component.

3. A battery cell box as described in claim 1, characterized in that: The top layer of the clamping plate has a "U" shaped structure, thus forming a clamping plate groove, and the middle layer of the clamping plate is located in the clamping plate groove.

4. A battery cell box as described in claim 3, characterized in that: The bottom layer of the clamping plate is bonded to both ends of the top layer of the clamping plate.

5. A battery cell box as described in claim 4, characterized in that: The height of the middle layer of the clamping plate in its natural state is greater than the depth of the clamping plate groove, and the middle layer of the clamping plate is in a compressed state when it is located in the clamping plate groove.

6. A battery cell box as described in claim 1, characterized in that: The bottom layer of the clamping plate is bonded to the middle layer of the clamping plate, and the top layer of the clamping plate is bonded to the middle layer of the clamping plate.

7. A battery cell box as described in claim 1, characterized in that: It also includes a first partition, which is located between the bottom plate of the cell box and the cell, and the first partition is configured as the clamping plate.

8. A battery cell box as described in claim 1, characterized in that: It also includes a second partition, which is located between the top plate of the cell box and the cell, and the second partition is configured as a heat insulation element.

9. A battery pack, characterized in that, The battery cell box includes the battery cell box as described in any one of claims 1-8, and further includes: Battery pack housing; A battery pack cover is connected to the battery pack housing, and a housing cavity is formed between the battery pack cover and the battery pack cover. The battery cell box is disposed in the housing cavity.

10. A battery pack as described in claim 9, characterized in that: It also includes liquid cooling plates, the number of which is at least two, and the cell box is located between two adjacent liquid cooling plates.

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