Batteries and electrical devices

Abstract

This invention belongs to the field of battery technology and discloses a battery and an electrical device. The battery includes a cell assembly, a cooling plate, an adhesive layer, and an adhesive-blocking assembly. The cell assembly includes at least two rows of cells arranged side by side. The cooling plate has a first region and a second region, with the temperature of the first region being lower than that of the second region. The orthographic projection of the cell assembly onto the cooling plate is distributed in the first and second regions. Both the first and second regions are provided with an adhesive layer, which has an open coating area. The orthographic projection of the open coating area onto the cooling plate is located within the first region, and the orthographic projection of the open coating area onto the cooling plate coincides with the orthographic projection of a portion of the cell assembly onto the cooling plate. The adhesive-blocking assembly is sandwiched between the cell assembly and a portion of the adhesive layer, and the adhesive-blocking assembly spans the gap between at least one set of two adjacent cell rows. This battery can improve the utilization rate of the adhesive layer and also improve the temperature uniformity of the cell assembly.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and more particularly to a battery and an electrical device. Background Technology

[0002] During battery assembly, an adhesive layer is usually applied to the liquid cooling plate first, and then the battery cell assembly is placed on the adhesive layer. After the adhesive layer cures, the battery cell assembly can be bonded to the liquid cooling plate through the adhesive layer.

[0003] Since the battery cell assembly is formed by arranging multiple rows of cells in sequence, the uncured adhesive layer will overflow into the gap between two adjacent rows of cells before the adhesive layer cures. This reduces the amount of adhesive layer bonded between the battery cell assembly and the liquid cooling plate, thus reducing the utilization rate of the adhesive layer.

[0004] Furthermore, the cooling effect of the liquid cooling plate relies on the cooling medium flowing inside it. This medium absorbs heat from the battery cells during its flow, thus cooling the cells. Along the flow direction of the cooling medium, the temperature of the upstream cooling medium is lower than that of the downstream cooling medium. Therefore, the temperature of the area corresponding to the upstream cooling medium in the battery cell assembly is significantly lower than the temperature of the area corresponding to the downstream cooling medium. This results in poor temperature uniformity within the battery cell assembly, thereby reducing battery performance.

[0005] Therefore, there is an urgent need to propose a battery and power supply device to solve the above-mentioned technical problems. Summary of the Invention

[0006] The first objective of this invention is to provide a battery that can improve the utilization rate of the adhesive layer and also improve the temperature uniformity of the cell assembly.

[0007] To achieve this objective, the present invention adopts the following technical solution: The battery includes: A battery cell assembly, comprising at least two rows of battery cells arranged side by side; The cooling plate has a first region and a second region. The temperature of the first region is lower than the temperature of the second region. The positive projection of the battery cell assembly on the cooling plate is distributed in the first region and the second region. The adhesive layer is provided in both the first and second regions. The adhesive layer has an open coating area. The orthographic projection of the open coating area on the cooling plate is located in the first region, and the orthographic projection of the open coating area on the cooling plate coincides with the orthographic projection of part of the battery cell assembly on the cooling plate. An adhesive-blocking assembly is sandwiched between the cell assembly and a portion of the adhesive layer, and the adhesive-blocking assembly spans the gap between at least one set of two adjacent cell rows.

[0008] Optionally, the adhesive layer is further provided with a groove, which is located on the side of the adhesive layer facing the cell assembly and corresponds to the position of the adhesive barrier component. The adhesive barrier component is located in the groove, and the surface of the adhesive barrier component facing the cell assembly is flush with the surface of the adhesive layer facing the cell assembly. Alternatively, the surface of the adhesive barrier component facing the cell assembly is located in the groove.

[0009] Optionally, the uncoated area is located at the bottom of the groove, and part of the adhesive-blocking component is located in the uncoated area and between the cooling plate and the battery cell assembly. The thermal conductivity of the adhesive-blocking component is greater than that of air, and the thermal conductivity of the adhesive-blocking component is less than that of the adhesive layer.

[0010] Optionally, the adhesive-blocking assembly located in the uncoated area can be flexibly clamped between the cooling plate and the battery cell assembly, and the other adhesive-blocking assemblies can be flexibly clamped between the bottom of the groove and the battery cell assembly.

[0011] Optionally, the adhesive blocking assembly includes an adhesive blocking member and two elastic members. The two elastic members are located on the side of the adhesive blocking member away from the cell assembly, and the two elastic members are spaced apart along the width direction of the adhesive blocking member at the edge of the adhesive blocking member. Each elastic member includes a first elastic part and a second elastic part connected to each other. The first elastic part is sandwiched between the bottom of the groove and the adhesive blocking member, and the second elastic part is located in the open coating area and sandwiched between the cooling plate and the adhesive blocking member.

[0012] Optionally, the cooling plate, adhesive layer, adhesive barrier assembly, and cell assembly are arranged sequentially from bottom to top to satisfy the following: ; Where h0 is the thickness of the adhesive barrier component in its natural state, in mm; t represents the thickness of the adhesive layer, in mm; G represents the weight of the battery cell assembly, in kg; S represents the area of ​​the adhesive baffle component projected onto the cooling plate, in mm². 2 ; E is the elastic coefficient of the adhesive barrier component.

[0013] Optionally, the gap between the two battery cell rows extends along a first direction, and the adhesive baffle extends at least from one end of the gap to the other end along the first direction, which is the length direction of the battery cell rows.

[0014] Optionally, the first region and the second region are distributed along the first direction, and both the first region and the second region extend along the second direction. All battery cell columns are arranged side by side in sequence along the second direction. The number of adhesive-blocking components, grooves and empty coating areas are multiple and correspond one-to-one. Multiple adhesive-blocking components are arranged at intervals along the second direction, which is the width direction of the battery cell column.

[0015] Optionally, the first region is connected to the second region, and along the direction from the first region to the second region, the area of ​​the uncoated area projected onto the cooling plate gradually decreases.

[0016] A second objective of the present invention is to provide an electrical device that is low in cost and has high battery performance.

[0017] To achieve this objective, the present invention adopts the following technical solution: Electrical devices, including the batteries mentioned above.

[0018] The beneficial effects of this invention are: First, an adhesive-blocking component is sandwiched between the battery cell assembly and a portion of the adhesive layer, spanning the gap between at least one set of two adjacent battery cell rows. Therefore, the adhesive-blocking component prevents at least a portion of the uncured adhesive layer from overflowing into the gap between adjacent battery cell rows, thus improving the utilization rate of the adhesive layer.

[0019] Secondly, the temperature of the first region of the cooling plate is lower than that of the second region, therefore the cooling capacity of the first region is greater than that of the second region. Both the first and second regions of the cooling plate are provided with an adhesive layer. The orthographic projection of the uncoated area of ​​the adhesive layer onto the cooling plate is located within the first region, and this projection coincides with the orthographic projection of a portion of the battery cell assembly onto the cooling plate. Therefore, the thermal resistance between the first region and the battery cell assembly is greater than that between the second region and the battery cell assembly. This compensates for the lower cooling capacity of the second region, making the cooling effects of the first and second regions on the battery cell assembly more consistent, thus improving the temperature uniformity of the battery cell assembly. Attached Figure Description

[0020] Figure 1 This is a partial exploded structural diagram of the battery provided by the present invention; Figure 2 This is a partially enlarged structural diagram of the battery cell assembly mounted on the cooling plate in the battery provided by the present invention; Figure 3 This is a schematic diagram of the flow channel distribution of the cooling plate provided by the present invention; Figure 4 This is a schematic diagram of the adhesive layer structure provided by the present invention; Figure 5 This is a schematic diagram of the assembly structure of the cooling plate, adhesive layer, and adhesive barrier assembly provided by the present invention; Figure 6 This is an exploded structural diagram of the adhesive-blocking assembly provided by the present invention; Figure 7 This is a schematic diagram of the assembly structure of the battery cell assembly and the adhesive shield assembly provided by the present invention.

[0021] In the picture: D1, First Direction; D2, Second Direction; 100, Battery cell assembly; 110, Battery cell array; 120, Gap; 131, First side; 132, Second side; 200, Cooling plate; 210, First region; 220, Second region; 231, Inlet; 232, Outlet; 300, Adhesive layer; 310, Open coating area; 320, Groove; 400, Adhesive barrier assembly; 410, Adhesive barrier element; 420, Elastic element; 421, First elastic part; 422, Second elastic part. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0023] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0026] This embodiment provides a battery that can improve the utilization rate of the adhesive layer and also improve the temperature uniformity of the cell assembly.

[0027] Specifically, such as Figure 1 and Figure 2 As shown, the battery includes a cell assembly 100, a cooling plate 200, an adhesive layer 300, and an adhesive barrier assembly 400. The cell assembly 100 includes at least two cell rows 110. Exemplarily, the number of cell rows 110 can be two, three, four, or more, with all cell rows 110 arranged side-by-side. The cooling plate 200 has a first region 210 and a second region 220. The temperature of the first region 210 is lower than the temperature of the second region 220. The orthographic projection of the cell assembly 100 onto the cooling plate 200 is distributed between the first region 210 and the second region 220. Both regions 220, the first region 210 and the second region 220 are provided with an adhesive layer 300. The adhesive layer 300 is provided with a blank coating area 310. The orthographic projection of the blank coating area 310 on the cooling plate 200 is located in the first region 210, and the orthographic projection of the blank coating area 310 on the cooling plate 200 coincides with the orthographic projection of a portion of the battery cell assembly 100 on the cooling plate 200. The adhesive blocking assembly 400 is sandwiched between the battery cell assembly 100 and a portion of the adhesive layer 300, and the adhesive blocking assembly 400 spans the gap 120 between at least one set of two adjacent battery cell rows 110.

[0028] Based on the above design, a baffle assembly 400 is sandwiched between the cell assembly 100 and a portion of the adhesive layer 300, spanning the gap 120 between at least one set of adjacent cell rows 110. Therefore, the baffle assembly 400 not only prevents at least a portion of the uncured adhesive layer 300 from overflowing into the gap 120 between adjacent cell rows 110, improving the utilization rate of the adhesive layer 300, but also provides lateral limiting support for adjacent cell rows 110, reducing the relative displacement of the cell rows 110 during assembly, transportation, and battery charge / discharge cycles. Simultaneously, because the adhesive layer 300 has no overflow loss, it can form a more complete and tightly bonded surface between the cell assembly 100 and the cooling plate 200, enhancing the connection strength between the cell assembly 100 and the cooling plate 200. This avoids cell loosening due to partial missing adhesive layer 300 or weak adhesion during long-term use, thereby reducing the risk of poor cell contact and thermal failure, and improving battery structural stability.

[0029] On the other hand, the temperature of the first region 210 of the cooling plate 200 is lower than that of the second region 220, so the cooling capacity of the first region 210 is greater than that of the second region 220. Both the first region 210 and the second region 220 of the cooling plate 200 are provided with an adhesive layer 300. The orthographic projection of the uncoated area 310 of the adhesive layer 300 on the cooling plate 200 is located within the first region 210, and the orthographic projection of the uncoated area 310 on the cooling plate 200 coincides with the orthographic projection of part of the battery cell assembly 100 on the cooling plate 200. Therefore, the thermal resistance between the first region 210 and the battery cell assembly 100 is greater than that between the second region 220 and the battery cell assembly 100. This can compensate for the lower cooling capacity of the second region 220, making the cooling effect of the first region 210 and the second region 220 on the battery cell assembly 100 more consistent, thereby improving the temperature uniformity of the battery cell assembly 100. The empty coating area 310 is located in the first area 210 of the cooling plate 200, which has a stronger cooling capacity, and overlaps with the orthographic projection of part of the battery cell assembly 100. In addition to balancing the cooling effect, it can also reserve a certain thermal management redundancy for the first area 210. When the battery is under complex operating conditions such as high-rate charging and discharging and high-temperature environment, and the heat generation of the battery cell assembly 100 increases sharply, the cooling potential of the first area 210 can be fully utilized. The adhesive layer 300 around the empty coating area 310 can still stably conduct heat and avoid local overheating. At the same time, the adhesive layer 300 in the second area 210 is completely covered, which can ensure the basic cooling effect, forming a redundant backup and precise adaptation thermal management mode, broadening the battery's operating condition adaptability range, and improving the safety of use under extreme conditions.

[0030] On the other hand, during the pressing process, air in the uncured adhesive can be expelled from the adhesive layer 300 through the empty coating area 310, preventing air residue in the adhesive layer 300 from affecting its thermal conductivity. Therefore, the empty coating area 310 not only improves the thermal conductivity of the adhesive layer 300 but also prevents residual air in the adhesive layer 300 from expanding and rupturing due to heat during long-term battery use, thus avoiding problems such as broken thermal conduction paths or fluctuations in thermal conductivity. This ensures the long-term stability of the thermal conductivity of the adhesive layer 300. Furthermore, improved temperature uniformity allows the operating temperature of each cell in the battery assembly 100 to be more consistent, preventing differences in capacity decay rates and inconsistent charge / discharge efficiencies caused by excessively high / low temperatures in some cells. This improves the overall performance consistency of the battery, ensures stable battery output power, and extends the cycle life of the battery assembly 100.

[0031] like Figure 3As shown, the cooling plate 200 has an inlet 231 and an outlet 232. The cooling medium enters the cooling plate 200 through the inlet 231, flows within the flow channel of the cooling plate 200, and finally exits the cooling plate 200 through the outlet 232. During the flow process, the cooling medium absorbs heat from the battery cell assembly 100. Therefore, along the flow direction of the cooling medium, the temperature of the upstream region (i.e., the first region 210) of the cooling plate 200 is lower than the temperature of the downstream region (i.e., the second region 220) of the cooling plate 200. In this embodiment, the cooling plate 200 is provided with multiple flow channels, each of which is distributed in a serpentine pattern. The multiple flow channels share a set of inlet 231 and outlet 232. The inlet 231 and outlet 232 are both located close to the first region 210. The cooling medium enters each flow channel through the inlet 231 and flows within the first region 210. Then, the cooling medium in each flow channel flows into the second region 220 and is finally discharged from the cooling plate 200 through the outlet 232. This flow channel layout can effectively reduce the internal temperature difference of the first region 210 and slow down the temperature rise rate of the second region 220. It works synergistically with the thermal resistance adjustment effect of the empty coating area 310 to further reduce the overall temperature difference of the cooling plate 200 and enhance the temperature uniformity of the battery cell assembly 100.

[0032] The cooling medium mentioned above can be cooling water, refrigerant, or cooling gas, etc., and no specific limitation is made here.

[0033] In other embodiments, the number, shape, and distribution of flow channels on the cooling plate 200 can also be in other forms, as long as the temperature of the first region 210 is lower than the temperature of the second region 220, and no other specific limitations are imposed.

[0034] It should be noted that the number of battery cell components 100 can be one or more. In this embodiment, the number of battery cell components 100 is two. Each battery cell component 100 is provided with an adhesive layer 300 between itself and the cooling plate 200. Each battery cell component 100 also has at least one adhesive-blocking component 400 and at least one uncoated area 310. This ensures that in the case of multiple battery cell components 100, each battery cell component 100 can obtain a uniform cooling effect and stable bonding support, adapting to the large-scale configuration requirements of different application scenarios such as power batteries and energy storage batteries.

[0035] Optionally, such as Figures 1 to 5As shown, the adhesive layer 300 also has a groove 320, which is located on the side of the adhesive layer 300 facing the cell assembly 100 and corresponds to the position of the adhesive barrier assembly 400. The adhesive barrier assembly 400 is located within the groove 320, and the surface of the adhesive barrier assembly 400 facing the cell assembly 100 is flush with the surface of the adhesive layer 300 facing the cell assembly 100. This is to avoid the problem of the adhesive barrier assembly 400 "resting" the cell assembly 100 on the adhesive layer 300. On the one hand, it can reduce the thermal resistance between the cell assembly 100 and the adhesive layer 300; on the other hand, it can improve the stability and reliability of the bonding between the cell assembly 100 and the adhesive layer 300.

[0036] In another embodiment, the side surface of the adhesive barrier 400 facing the cell assembly 100 is located within the groove 320 to ensure that the cell assembly 100 can reliably adhere to and bond with the adhesive layer 300.

[0037] Furthermore, the uncoated area 310 is located at the bottom of the groove 320, and part of the adhesive-blocking assembly 400 is located within the uncoated area 310, between the cooling plate 200 and the cell assembly 100. That is, the orthogonal projection of the adhesive-blocking assembly 400 on the cooling plate 200 overlaps with the orthogonal projection of the uncoated area 310 on the cooling plate 200. The thermal conductivity of the adhesive-blocking assembly 400 is greater than that of air, and less than that of the adhesive layer 300. For ease of description, the thermal resistance between the first region 210 and the cell assembly 100 will be referred to as R1, and the thermal resistance between the second region 220 and the cell assembly 100 will be referred to as R2. If the uncoated area 310 and the adhesive barrier assembly 400 are staggered on the adhesive layer 300, then in the uncoated area 310, the cooling plate 200 and the cell assembly 100 can only transfer heat through the air. However, the thermal resistance of the air is relatively large, which will cause R1 to increase sharply. This may even lead to the problem that the cooling capacity of the first area 210 is less than that of the second area 220, which in turn causes the problem of uneven temperature distribution in the cell assembly 100. In this embodiment, at the uncoated area 310, there is still a heat-conducting adhesive-blocking component 400 between the cooling plate 200 and the cell assembly 100. The heat conduction capacity of the adhesive-blocking component 400 is greater than that of air but less than that of the adhesive layer 300. Therefore, setting the uncoated area 310 will not cause R1 to increase sharply. The uncoated area 310 and the adhesive-blocking component 400 work together to achieve an effect where R1 is slightly greater than R2. This compensates for the low cooling capacity of the second region 220, making the cooling effect of the first region 210 and the second region 220 on the cell assembly 100 more consistent, thereby improving the temperature uniformity of the cell assembly 100.

[0038] In this embodiment, the area of ​​the uncoated area 310 projected onto the cooling plate 200 is about 40% of the area of ​​the adhesive barrier assembly 400 projected onto the cooling plate 200.

[0039] Furthermore, the adhesive-blocking assembly 400 located in the uncoated area 310 can be elastically clamped between the cooling plate 200 and the battery cell assembly 100, and the remaining adhesive-blocking assemblies 400 can be elastically clamped between the bottom of the groove 320 and the battery cell assembly 100. For ease of description, the side of the battery cell assembly 100 corresponding to the first region 210 is referred to as the first side 131, and the side of the battery cell assembly 100 corresponding to the second region 220 is referred to as the second side 132. In this embodiment, the elastic deformation of the adhesive-blocking assembly 400 adjusts the distance between the first side 131 and the second side 132 and the adhesive layer 300, ultimately ensuring that both the first side 131 and the second side 132 of the battery cell assembly 100 are tightly adhered to and bonded to the adhesive layer 300. Furthermore, when assembling the battery, before the adhesive layer 300 has cured, pressing different positions of the cell assembly 100 can quickly adjust the distance between the first side 131 and the second side 132 and the adhesive layer 300, which helps to improve adjustment efficiency and reduce adjustment difficulty and cost.

[0040] Furthermore, the cooling plate 200, adhesive layer 300, adhesive-blocking assembly 400, and battery cell assembly 100 are arranged sequentially from bottom to top to satisfy the following requirements: ; Where h0 is the thickness of the adhesive barrier component 400 in its natural state, in mm; t represents the thickness of the 300mm adhesive layer; G represents the weight of the battery cell assembly 100, in kg. S represents the area of ​​the obstruction assembly 400 projected onto the cooling plate 200, in mm². 2 ; E is the elastic coefficient of the adhesive barrier component 400.

[0041] Before assembling the battery, a suitable adhesive-blocking component 400 can be selected according to the above formula. This ensures that the thickness of the adhesive-blocking component 400 after compression is less than or equal to the thickness of the adhesive layer 300. Consequently, the surface of the adhesive-blocking component 400 facing the cell assembly 100 is flush with the surface of the adhesive layer 300 facing the cell assembly 100, or the surface of the adhesive-blocking component 400 facing the cell assembly 100 is located within the groove 320. This avoids shrinkage deformation caused by uneven local stress during the adhesive layer curing process, reduces the risk of adhesive layer cracking, and thus ensures the stability of the thermal conductivity and adhesion of the adhesive layer.

[0042] For ease of description, the thickness of the adhesive barrier assembly 400 after compression will be referred to as h, and the amount of compression of the adhesive barrier assembly 400 will be referred to as Δh. Then Δh = h0 - h, that is, h = h0 - Δh. In addition, Δh also satisfies the following formula: To ensure that h ≤ t, the formula h0 - Δh ≤ t must be satisfied, which means the formula is: Therefore, when h0 satisfies the formula This ensures that the thickness h of the adhesive barrier component 400 after compression is less than or equal to the thickness t of the adhesive layer 300.

[0043] Optionally, such as Figures 1 to 6 As shown, the adhesive-blocking assembly 400 includes an adhesive-blocking member 410 and two elastic members 420. Both elastic members 420 are located on the side of the adhesive-blocking member 410 facing away from the cell assembly 100, and are spaced apart along the width of the adhesive-blocking member 410 at its edge. Each elastic member 420 includes a first elastic portion 421 and a second elastic portion 422 connected together. The first elastic portion 421 is sandwiched between the bottom of the groove 320 and the adhesive-blocking member 410, while the second elastic portion 422 is located within the uncoated area 310 and sandwiched between the cooling plate 200 and the adhesive-blocking member 410. The elastic deformation of the elastic members 420 adjusts the distance between the first side 131 and the second side 132 and the adhesive layer 300, ultimately ensuring that both the first side 131 and the second side 132 of the cell assembly 100 are tightly adhered to and bonded to the adhesive layer 300. Furthermore, by providing an elastic element 420 only at each edge along the width of the sealant 410, the material used for the elastic element 420 can be reduced, thereby lowering production costs. This also ensures uniform force distribution on the sealant 410, preventing it from tilting due to uneven force and ultimately reducing its sealant application effectiveness. Simultaneously, the sealant assembly 400 can fill the gaps between the battery cells, reducing air retention in the gaps, decreasing thermal resistance differences at the gaps, and improving the temperature uniformity of the battery cell assembly.

[0044] In this embodiment, the adhesive blocking component 410 is a PC sheet, and the elastic component 420 is a silicone strip. Since PC and silicone materials have similar thermal resistance, using a PC sheet for the adhesive blocking component 410 and a silicone strip for the elastic component 420 helps improve the overall thermal resistance consistency of the adhesive blocking assembly 400. The PC sheet not only has stable thermal resistance but also excellent insulation, high-temperature resistance, and mechanical strength. It can effectively isolate the circuit between the battery cell assembly 100 and the cooling plate 200, avoiding safety hazards caused by insulation failure. Simultaneously, it can withstand the compressive force of the elastic component 420 and the stress during the adhesive layer curing process, making it less prone to deformation and breakage, thus ensuring the long-term stability of the adhesive blocking function. The silicone strip, on the other hand, has good high-temperature resistance, aging resistance, and sealing properties. It has strong compatibility with the PC sheet, cooling plate 200, and adhesive layer 300, making it less prone to detachment. This ensures the effectiveness of elastic adjustment and further prevents adhesive leakage. Furthermore, the thermal conductivity of silicone material assists in heat conduction without affecting the heat dissipation effect of the cooling plate 200 on the battery cell assembly 100. Of course, in other embodiments, the adhesive barrier 410 can also be a mica sheet or other components with thermal conductivity and insulation properties, and the elastic component 420 can also be a graphene aerogel or other components with thermal conductivity and elasticity.

[0045] It is understood that the elastic element 420 is elastic, while the adhesive-blocking element 410 is not. Therefore, the above-mentioned h0 refers to the sum of the thickness of the elastic element 420 in its natural state and the thickness of the adhesive-blocking element 410, and the above h refers to the sum of the thickness of the elastic element 420 after compression and the thickness of the adhesive-blocking element 410. The above-mentioned Δh refers to the compression amount of the elastic element 420. In this embodiment, the thickness of the adhesive-blocking element 410 is about 0.5mm, which is a thin design to reduce production costs. At the same time, the thin adhesive-blocking element 410 does not excessively increase the heat conduction path, which can avoid the decrease in heat dissipation efficiency due to the adhesive-blocking element being too thick, thus balancing production costs, installation space, and heat dissipation performance. In addition, the non-elastic design of the adhesive-blocking element 410 can prevent its own deformation from affecting the accuracy of the spacing adjustment, ensuring the stability of the compression amount of the elastic element 420, thereby ensuring the tightness and consistency of the bonding between the battery cell assembly 100 and the adhesive layer 300.

[0046] In another embodiment, the adhesive blocking assembly 400 includes a silicone sheet located within the groove 320, and the silicone sheet located in the uncoated area 310 is elastically clamped between the cooling plate 200 and the cell assembly 100, while the remaining silicone sheets are elastically clamped between the bottom of the groove 320 and the cell assembly 100.

[0047] It should be noted that when there are a large number of cell rows 110, before the cell assembly 100 is installed into the battery box, acrylic glue or similar adhesive can be applied to the side of the adhesive baffle 410 away from the elastic member 420. The adhesive baffle 410 is then attached to the bottom of the cell assembly 100, so that the adhesive baffle 410 spans the gap 120 between two adjacent cell rows 110. Then the cell assembly 100 with the adhesive baffle 400 attached is installed into the battery box, so that the elastic member 420 matches the adhesive layer 300 inside the battery box. This reduces the positional deviation of the adhesive baffle 400 caused by the squeezing force when the cell assembly 100 is installed into the battery box, which helps to improve the consistency of the cell assembly 100 and the adhesive baffle 400 when they are installed into the battery box.

[0048] Optionally, such as Figures 1 to 7 As shown, the gap 120 between the two battery cell arrays 110 extends along a first direction D1, which is the length direction of the battery cell array 110. The adhesive-blocking assembly 400 extends from at least one end of the gap 120 to the other along the first direction D1. That is, the adhesive-blocking assembly 400 can extend from one end of the gap 120 to the other along the first direction D1. Alternatively, the adhesive-blocking assembly 400 can extend from one or both ends of the gap 120 along the first direction D1. All of these forms allow the adhesive-blocking assembly 400 to completely cover the entire gap 120, preventing uncured adhesive layer 300 from overflowing into the gap 120. Therefore, this structure improves the barrier effect of the adhesive-blocking assembly 400 on the adhesive layer 300, which is beneficial for further improving the utilization rate of the adhesive layer 300.

[0049] Optionally, the first region 210 and the second region 220 are distributed along the first direction D1, and both the first region 210 and the second region 220 extend along the second direction D2, which is the width direction of the cell array 110. All cell arrays 110 are arranged side by side in sequence along the second direction D2. The number of adhesive-blocking components 400, grooves 320, and uncoated areas 310 are all multiple and correspond one-to-one. The multiple adhesive-blocking components 400 are spaced apart along the second direction D2, that is, the multiple uncoated areas 310 are spaced apart along the second direction D2. For example, the number of adhesive-blocking components 400 can be two, three, or four, etc. On the one hand, by setting multiple adhesive-blocking components 400, each adhesive-blocking component 400 spans the gap 120 between two adjacent cell arrays 110 in a corresponding group, the utilization rate of the adhesive layer 300 can be further improved. On the other hand, setting multiple uncoated areas 310 and arranging them at intervals along the second direction D2 helps to further compensate for the difference in cooling capacity between the second region 220 and the first region 210. This makes the cooling effect of the first region 210 and the second region 220 on the cell assembly 100 more consistent, thereby further improving the temperature uniformity of the cell assembly 100. Simultaneously, the multiple uncoated areas 310 reduce the amount of adhesive used in the first region, improving adhesive utilization and reducing costs.

[0050] Furthermore, along the second direction D2, the orthographic projections of multiple adhesive-blocking components 400 on the cooling plate 200 are evenly distributed with respect to the orthographic projection of the battery cell assembly 100 on the cooling plate 200. This structure can improve the uniformity of thermal resistance between the first region 210 and the battery cell assembly 100 along the second direction D2, thereby improving the uniformity of the cooling effect of the first region 210 on the battery cell assembly 100 and achieving the effect of improving the temperature uniformity of the battery cell assembly 100. On the other hand, this structure is beneficial to improving the uniformity of the supporting effect of the adhesive layer 300 on the battery cell assembly 100, and can avoid the problem of the battery cell assembly 100 tilting due to uneven force.

[0051] Optionally, the first region 210 is connected to the second region 220. Along the direction from the first region 210 to the second region 220, the area of ​​the uncoated region 310 projected onto the cooling plate 200 gradually decreases. Therefore, along the direction from the first region 210 to the second region 220, the thermal resistance between the first region 210 and the cell assembly 100 gradually decreases. This is beneficial for improving the uniformity of the thermal resistance between the first region 210 and the cell assembly 100 in the first direction D1, thereby improving the uniformity of the cooling effect of the first region 210 on the cell assembly 100 and achieving the effect of improving the temperature uniformity of the cell assembly 100.

[0052] This embodiment also provides an electrical device, which can be a new energy vehicle, etc. The electrical device includes the battery mentioned above. Therefore, the cost of the electrical device is low and the battery performance of the electrical device is high.

[0053] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A battery, characterized in that, include: A battery cell assembly (100) comprising at least two rows of cells (110), all of which are arranged side by side; A cooling plate (200) is provided with a first region (210) and a second region (220), the temperature of the first region (210) is lower than the temperature of the second region (220), and the orthographic projection of the battery cell assembly (100) on the cooling plate (200) is distributed in the first region (210) and the second region (220); An adhesive layer (300) is provided in both the first region (210) and the second region (220). The adhesive layer (300) has an open coating area (310). The orthographic projection of the open coating area (310) on the cooling plate (200) is located in the first region (210), and the orthographic projection of the open coating area (310) on the cooling plate (200) coincides with the orthographic projection of a portion of the battery cell assembly (100) on the cooling plate (200). A sealant assembly (400) is sandwiched between the cell assembly (100) and a portion of the adhesive layer (300), and the sealant assembly (400) is spanned by a gap (120) between at least one set of two adjacent cell rows (110).

2. The battery according to claim 1, characterized in that, The adhesive layer (300) is further provided with a groove (320), the groove (320) is located on the side of the adhesive layer (300) facing the cell assembly (100) and corresponds to the position of the adhesive barrier assembly (400), the adhesive barrier assembly (400) is located in the groove (320), the surface of the adhesive barrier assembly (400) facing the cell assembly (100) is flush with the surface of the adhesive layer (300) facing the cell assembly (100), or the surface of the adhesive barrier assembly (400) facing the cell assembly (100) is located in the groove (320).

3. The battery according to claim 2, characterized in that, The uncoated area (310) is located at the bottom of the groove (320). Part of the adhesive barrier assembly (400) is located in the uncoated area (310) and between the cooling plate (200) and the battery cell assembly (100). The thermal conductivity of the adhesive barrier assembly (400) is greater than that of air, and the thermal conductivity of the adhesive barrier assembly (400) is less than that of the adhesive layer (300).

4. The battery according to claim 3, characterized in that, The adhesive-blocking assembly (400) located in the uncoated area (310) can be elastically clamped between the cooling plate (200) and the battery cell assembly (100), and the remaining adhesive-blocking assemblies (400) can be elastically clamped between the bottom of the groove (320) and the battery cell assembly (100).

5. The battery according to claim 4, characterized in that, The adhesive-blocking assembly (400) includes an adhesive-blocking member (410) and two elastic members (420). The two elastic members (420) are located on the side of the adhesive-blocking member (410) away from the cell assembly (100), and the two elastic members (420) are spaced apart along the width direction of the adhesive-blocking member (410) at the edge of the adhesive-blocking member (410). Each elastic member (420) includes a first elastic part (421) and a second elastic part (422) connected to each other. The first elastic part (421) is sandwiched between the bottom of the groove (320) and the adhesive-blocking member (410). The second elastic part (422) is located in the uncoated area (310) and is sandwiched between the cooling plate (200) and the adhesive-blocking member (410).

6. The battery according to claim 4, characterized in that, The cooling plate (200), the adhesive layer (300), the adhesive-blocking assembly (400), and the battery cell assembly (100) are arranged sequentially from bottom to top, satisfying the following conditions: ； Where h0 is the thickness of the adhesive barrier assembly (400) in its natural state, in mm; t is the thickness of the adhesive layer (300), in mm; G is the weight of the battery cell assembly (100), in kg; S is the area of ​​the orthographic projection of the adhesive-blocking assembly (400) onto the cooling plate (200), in mm. 2 ; E is the elastic coefficient of the adhesive barrier component (400).

7. The battery according to claim 3, characterized in that, The gap (120) between the two battery cell rows (110) extends along a first direction (D1), and the adhesive-blocking assembly (400) extends along the first direction (D1) from at least one end of the gap (120) to the other end, the first direction (D1) being the length direction of the battery cell rows (110).

8. The battery according to claim 7, characterized in that, The first region (210) and the second region (220) are distributed along the first direction (D1), and both the first region (210) and the second region (220) extend along the second direction (D2). All the battery cell rows (110) are arranged side by side in sequence along the second direction (D2). The number of the adhesive-blocking assembly (400), the groove (320) and the empty coating area (310) are multiple and correspond one-to-one. The multiple adhesive-blocking assemblies (400) are spaced apart along the second direction (D2), and the second direction (D2) is the width direction of the battery cell row (110).

9. The battery according to any one of claims 1-8, characterized in that, The first region (210) is connected to the second region (220), and along the direction from the first region (210) to the second region (220), the area of ​​the uncoated area (310) projected onto the cooling plate (200) gradually decreases.

10. An electrical appliance, characterized in that, Includes the battery as described in any one of claims 1-9.

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