Module upper cover and battery pack

Abstract

This utility model relates to the field of battery technology, providing a module cover and a battery pack. The module cover includes a cover body and a cooling platform. Along the height direction of the cover body, the cooling platform is located on the side of the cover body facing the battery module. Multiple cooling platforms are provided, each corresponding to a battery pack's battery pad, with the contact surface of each cooling platform in contact with the battery pad. Each cooling platform has a cooling cavity for injecting cooling material to cool the battery pad. This utility model's module cover allows for heat exchange between the battery pad and the air, as well as heat conduction through the cooling cavity. Especially when the battery cell temperature rises rapidly and the battery pad generates a large amount of heat, the cooling platform can accelerate the cooling of the battery pad and enhance its heat exchange effect.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a module cover and battery pack. Background Technology

[0002] In the design and development of power battery packs for new energy vehicles, cell integration solutions are gradually becoming integrated with the vehicle. With increasing customer demand for faster charging, high-rate charging has become the mainstream trend. High-rate fast charging leads to rapid temperature increases in the cells, resulting in high heat generation in the battery cells and severe overheating of the terminals.

[0003] Currently, the battery cells and terminals exchange heat naturally with the air, resulting in a slow cooling effect and an inability to effectively control thermal runaway. Utility Model Content

[0004] This utility model provides a module cover and a battery pack to solve the problem in the prior art that the heat generated by the battery cells cannot be effectively cooled and the thermal runaway of the battery cells cannot be effectively controlled.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] In a first aspect, this utility model provides a module cover for use in a battery pack, comprising:

[0007] Cover;

[0008] A cooling platform is provided along the height direction of the cover body on the side of the cover body facing the battery module. Multiple cooling platforms are provided, and each cooling platform is arranged in a one-to-one correspondence with a battery pack panel. The contact surface of each cooling platform and the battery pack panel is fitted together. Each cooling platform has a cooling cavity, and the cooling cavity is used to inject cooling material to cool the battery pack panel.

[0009] According to the present invention, a module cover is provided, the cooling platform comprising:

[0010] A first cooling section is used to fit the protrusion of the bar sheet, and the first cooling section has a hollow cavity.

[0011] The second cooling section is provided in two parts, which are located at both ends of the first cooling section. The second cooling section also has a hollow cavity and is connected to the cavity of the first cooling section, together forming the cooling cavity.

[0012] According to the present invention, a module cover is provided in which the connection between the first cooling part and the second cooling part is made by an arc.

[0013] According to the present invention, a module cover has a phase change material layer in the cooling cavity. The phase change material layer fills the cavity in the first cooling part and the second cooling part, and the phase change material layers in the first cooling part and the second cooling part are connected to form a whole.

[0014] According to the present invention, a module cover is provided, wherein an annular flow channel is formed in the cover body, the annular flow channel has a liquid injection port and a liquid outlet, the liquid injection port and the liquid outlet are connected to an external cooling device, and coolant is introduced into the flow channel;

[0015] The multiple cooling chambers are connected to the annular flow channel.

[0016] According to the present invention, a module cover is provided in the area where the cover is connected to the cooling platform. The first opening is connected to the cooling cavity formed by the annular flow channel, the first cooling part and the second cooling part.

[0017] According to the present invention, a module cover is provided, wherein a heat-conducting layer is provided between the cooling platform and the plate;

[0018] The heat-conducting layer is provided in multiple parts, and the shape of each heat-conducting layer is similar to that of each plate.

[0019] According to the present invention, a module cover is provided, wherein the cover body and the cooling platform are plastic parts, and a cooling cavity is formed inside the plastic parts;

[0020] Alternatively, the cover and the cooling platform may be made of metal, and the surface of the metal may have an insulating layer.

[0021] According to the present invention, a module cover is provided, wherein the cover body is provided with a clearance hole, and the clearance hole is connected to the exhaust channel of the explosion-proof valve;

[0022] The cover has multiple clearance holes, which are spaced apart along the length of the cover.

[0023] Secondly, this utility model provides a battery pack, including: a battery module, a battery plate, and a module cover as described above;

[0024] The battery module is provided in multiple ways, and the top cover of each module is connected to the corresponding battery module through the plate.

[0025] The module cover and battery pack provided by this utility model are designed to include a cover body and a cooling platform. Multiple spaced cooling platforms are arranged on the side of the cover body facing the battery module, so that each cooling platform is fitted to the battery pack. A cooling cavity is set in the cooling platform and a cooling material is injected to cool the battery pack. This allows the battery pack to exchange heat through the cooling cavity in addition to natural heat exchange with the air. Especially when the battery cell temperature rises rapidly and the battery pack generates a lot of heat, the cooling platform can accelerate the cooling of the battery pack and enhance the heat exchange effect of the battery pack. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a three-dimensional structural diagram of the module cover provided by this utility model.

[0028] Figure 2 This is a front view of the module cover provided by this utility model.

[0029] Figure 3 This is a left view of the module cover provided by this utility model.

[0030] Figure 4 This utility model provides Figure 3 AA sectional view.

[0031] Figure 5 This is a three-dimensional structural diagram of the plaster provided by this utility model.

[0032] Figure label:

[0033] 1. Module top cover;

[0034] 11. Cover; 12. Cooling platform; 111. Annular flow channel; 112. Clearance hole; 113. First opening; 121. Cooling chamber; 122. First cooling section; 123. Second cooling section;

[0035] 2. Phenytocin. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0037] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of clarifying the embodiments of this utility model and simplifying the description, 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 embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model according to the specific circumstances.

[0039] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is 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 can mean that the first feature is 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.

[0040] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0041] The following is combined Figures 1 to 5 The module cover and battery pack provided in this utility model embodiment will be described in detail through specific embodiments and application scenarios.

[0042] Firstly, such as Figure 1 , Figure 2 and Figure 5 As shown, this embodiment provides a module cover 1, which is applied to a battery pack and includes: a cover body 11 and a cooling platform 12.

[0043] Along the height direction of the cover 11, a cooling platform 12 is provided on the side of the cover 11 facing the battery module. There are multiple cooling platforms 12, and each cooling platform 12 is arranged in a one-to-one correspondence with the battery pack's pad 2. The contact surface of each cooling platform 12 and the battery pack's pad 2 is fitted together. The cooling platform 12 has a cooling cavity 121, which is used to inject cooling material to cool the battery pack's pad 2.

[0044] Understandably, a battery module comprises multiple battery cells, which are stacked to form the battery module, with heat-insulating material placed between the cells. The battery pack's busbar 2 is an important component of the busbar. The busbar 2 is welded to the terminal of the battery cell, and multiple busbars 2 are connected to form a busbar, which connects multiple battery cells in parallel or series.

[0045] For prismatic battery cells, the terminals of the cells are all arranged facing upwards, and the battery pack 2 connected to the terminals is also located on top of the battery module. The module cover 1 is located on top of the battery module. In this embodiment, the shape of the cooling platform 12 is adapted to the shape of the battery pack 2 and is in contact with the upper surface of the battery pack 2. The cooling material in the cooling chamber 121 within the cooling platform 12 performs real-time heat exchange and cooling of the battery pack 2. Since the cooling platform 12 and the battery pack 2 are in close contact, the outer wall of the cooling platform 12 and the battery pack 2 can conduct heat exchange. The heat of the battery pack 2 is cooled by the cooling material in the cooling platform 12, and the high-temperature battery pack 2 is cooled in real time. This allows the battery pack 2 to not only exchange heat naturally with the ambient air, but also to conduct heat, enhancing the heat exchange rate of the battery pack 2 and strengthening its heat exchange effect.

[0046] Since the battery module has multiple terminals, multiple battery pads 2 are required to be connected to the corresponding terminals. Therefore, the cover 11 of this embodiment is provided with multiple cooling platforms 12, the number of which is equal to the number of battery pads 2, and each cooling platform 12 corresponds to the position of the corresponding battery pad 2.

[0047] Specifically, in this embodiment, the cover 11 is a strip plate, and the cooling platform 12 protrudes along the height direction of the cover 11 on the side of the cover 11 facing the bar plate 2. The concave and convex parts of the bar plate 2 fit into the concave and convex parts of the cooling platform 12, ensuring that the cooling platform 12 can be adapted to the shape of the bar plate 2, so as to enhance the contact area between the cooling platform 12 and the bar plate 2 and ensure that the cooling platform 12 provides maximum heat exchange and cooling to the bar plate 2.

[0048] The module cover 1 provided by this utility model includes a cover body 11 and a cooling platform 12. Multiple spaced cooling platforms 12 are arranged on the side of the cover body 11 facing the battery module, so that each cooling platform 12 is fitted to the battery chip 2. A cooling cavity 121 is set in the cooling platform 12 and a cooling material is injected to cool the battery chip 2. In addition to natural heat exchange with the air, the battery chip 2 can also be heat transferred through the cooling cavity 121. Especially when the battery cell temperature rises rapidly and the battery chip 2 generates a lot of heat, the cooling platform 12 can accelerate the cooling of the battery chip 2 and enhance the heat exchange effect of the battery chip 2.

[0049] like Figure 1 and Figure 5 As shown, the cooling platform 12 in this embodiment includes a first cooling section 122 and a second cooling section 123.

[0050] The first cooling section 122 is used to fit the protrusion of the bar plate 2, and the first cooling section 122 has a hollow cavity.

[0051] There are two second cooling sections 123, which are respectively located at both ends of the first cooling section 122. The second cooling section 123 also has a hollow cavity and is connected to the cavity of the first cooling section 122, forming a cooling cavity 121 together.

[0052] Understandably, the bar sheet 2 has a strip-shaped structure with both ends on the same plane and the middle protruding from both ends. In this embodiment, the first cooling section 122 has the same shape as the protruding part of the bar sheet 2 and fits into the protruding part of the bar sheet 2. The second cooling section 123 is located at both ends of the first cooling section 122 and fits into both ends of the bar sheet 2.

[0053] Two second cooling sections 123 and a first cooling section 122 are connected along the length of the cover 11 to form a structure similar in shape to the bar plate 2, so as to fit tightly with the bar plate 2 and facilitate heat exchange.

[0054] The first cooling section 122 and the second cooling section 123 both have hollow cavities, and the cavities of the first cooling section 122 and the second cooling section 123 are connected to form a cooling cavity 121 with the same length as the extension of the bar piece 2, which facilitates the cooling of the protruding part in the middle of the bar piece 2 and the flat parts on both sides.

[0055] like Figure 1 As shown, the connection between the first cooling section 122 and the second cooling section 123 in this embodiment is an arc connection.

[0056] Understandably, in order to ensure the smooth transition between the cavities in the first cooling section 122 and the second cooling section 123, the connection between the first cooling section 122 and the second cooling section 123 in this embodiment is made of arc. When heat is transferred between the first cooling section 122 and the second cooling section 123, it can be conducted more evenly, and the temperature field will not change rapidly due to the sharp corner between the first cooling section 122 and the second cooling section 123, thereby ensuring the uniformity and reliability of the cooling of the bar plate 2 by the cooling platform 12.

[0057] like Figure 3 and Figure 4 As shown, the cooling cavity 121 of this embodiment has a phase change material layer. The phase change material layer fills the cavity in the first cooling section 122 and the second cooling section 123, and the phase change material layers in the first cooling section 122 and the second cooling section 123 are connected to form a whole.

[0058] Understandably, the phase change material layer can absorb and release heat through its own phase change. When the battery cell 2 is under high temperature conditions, the phase change material layer can absorb heat from the battery cell 2 and cool it. Both the first cooling section 122 and the second cooling section 123 are filled with phase change material layers, and the phase change material layers are connected as a whole within the cooling platform 12. The multiple cooling platforms 12 on the cover 11 are all filled with phase change material layers, which simultaneously absorb heat through phase change at high temperatures in the battery cell 2, and simultaneously reduce the temperature of the multiple battery cells 2 within the battery module.

[0059] like Figure 3 and Figure 4 As shown, an annular flow channel 111 is formed inside the cover 11 of this embodiment. The annular flow channel 111 has an injection port and an outlet. The injection port and the outlet are connected to an external cooling device. Coolant is introduced into the flow channel. Multiple cooling chambers 121 are connected to the annular flow channel 111.

[0060] Understandably, in order to cool the bar slices 2 via the cooling platform 12, cooling can also be achieved through convective heat exchange between the injected coolant in the cooling chamber 121 and the bar slices 2. An annular flow channel 111 is arranged around the perimeter of the cover 11, and the annular flow channel 111 connects to multiple cooling chambers 121, forming a cooling flow channel. This entire cooling flow channel, together with the external cooling equipment, forms a circulating cooling system. Coolant supplied from the cooling equipment enters the annular flow channel 111 through the injection port and flows through each cooling chamber 121. Within each cooling chamber 121, the coolant undergoes convective heat exchange with the bar slices 2. The heated coolant then flows out of the annular flow channel 111 through the outlet and returns to the cooling equipment for cooling. The cooled coolant is then reintroduced into the annular flow channel 111, thus achieving a cooling cycle.

[0061] like Figure 3 and Figure 4 As shown, in this embodiment, the area where the cover 11 is connected to the cooling platform 12 is provided with a first opening 113. The first opening 113 is connected to the cooling cavity 121 formed by the annular flow channel 111, the first cooling section 122, and the second cooling section 123.

[0062] Understandably, in order to connect the annular flow channel 111 with the first cooling section 122 and the second cooling section 123, the cover 11 of this embodiment is provided with a first opening 113. Along the length direction of the cover 11, the first opening 113 passes through the connection between the first cooling section 122, the second cooling section 123 and the cover 11.

[0063] Specifically, the length of the first opening 113 is equal to the length of the cooling platform 12, and the width of the first opening 113 is equal to the width of the annular flow channel 111.

[0064] In this embodiment, a heat-conducting layer is provided between the cooling platform 12 and the bar plate 2; multiple heat-conducting layers are provided, and each heat-conducting layer is similar in shape to each bar plate 2.

[0065] Understandably, to ensure a better fit between the module cover 1 and the pad 2, a heat-conducting layer is provided between the cooling platform 12 and the pad 2 in this embodiment. The heat-conducting layer is a flexible dielectric layer. It can both conduct heat from the module cover 1 to the pad 2 and fill the installation gap between the module cover 1 and the pad 2, thereby compensating for the installation gap and ensuring the stability and reliability of the module cover 1 and the pad 2 after installation.

[0066] Furthermore, the thermally conductive layer includes at least one of a thermally conductive adhesive layer, a thermally conductive pad, or a thermally conductive structural adhesive layer.

[0067] In this embodiment, the thermally conductive layer can be either a thermally conductive adhesive layer, which has low thermal resistance, high thermal conductivity, and can be coated into an extremely thin layer, maintaining elasticity after curing to alleviate thermal expansion stress; or a thermally conductive pad, which has a wide range of selectable thicknesses, can be directly applied without curing, simplifying the assembly process and facilitating maintenance and replacement; or a thermally conductive structural adhesive, which provides high-strength mechanical fixation while conducting heat, and exhibits excellent vibration and impact resistance.

[0068] like Figure 1 As shown, the cover 11 and cooling platform 12 in this embodiment are plastic parts, and a cooling cavity 121 is formed inside the plastic parts.

[0069] Understandably, the insulation and corrosion resistance of the plastic parts enable the cover 11 and the cooling platform 12 to naturally insulate and isolate the bar sheet 2. Furthermore, the plastic parts have good corrosion resistance and are stable in shape, making them resistant to deformation. This allows them to reliably fill the cooling cavity 121 formed by the plastic parts with a phase change material layer or inject coolant.

[0070] Specifically, the plastic parts can be PA66 or PA12.

[0071] like Figure 1 As shown, the cover 11 and cooling platform 12 in this embodiment are metal parts, and the surface of the metal parts has an insulating layer.

[0072] Understandably, the cover 11 and cooling platform 12 can be made of metal. Metal has a faster heat transfer rate, enabling it to exchange heat with the platen 2 more quickly and dissipate the heat. Furthermore, since metal is conductive, an insulating layer needs to be applied to the surface of the metal to prevent current from the platen 2 from being conducted to the module cover 1 and causing a safety accident.

[0073] Specifically, the metal part can be an aluminum part. The insulation layer can be an insulating spray coating on the surface of the metal part, or a layer of mica paper or ceramic fiber can be pasted on the surface of the metal part.

[0074] like Figure 2 As shown, the cover 11 of this embodiment is provided with a clearance hole 112, which is connected to the exhaust channel of the explosion-proof valve.

[0075] Multiple clearance holes 112 are provided, and the multiple clearance holes 112 are spaced apart along the length direction of the cover body 11.

[0076] Understandably, since each cell in the battery module is equipped with an explosion-proof valve at its top, the explosion-proof valve provides a directional exhaust channel for the high-pressure, high-temperature gas accumulated inside the battery during thermal runaway. In this embodiment, the clearance hole 112 on the cover 11 corresponds to the location of the explosion-proof valve in each cell of the battery module, providing a clear and unobstructed vertical exhaust channel for the opening and ejection of the explosion-proof valve in terms of physical space. The clearance hole 112 ensures that the high-pressure, high-temperature gas can be discharged in a timely manner, preventing ejected material from falling onto the electrode plate 2 and causing a short circuit in the battery module due to insulation failure.

[0077] Secondly, this embodiment provides a battery pack, including: a battery module, a battery pack 2, and a module cover 1 as described above.

[0078] There are multiple battery modules, and the cover 1 of each module is connected to the corresponding battery module through the plate 2.

[0079] Specifically, since the battery pack includes a module cover 1, and the specific structure of the module cover 1 is as described in the above embodiments, the battery pack shown in this embodiment includes all the technical solutions of the above embodiments. Therefore, it has at least all the beneficial effects achieved by all the technical solutions of the above embodiments, which will not be described in detail here.

[0080] Understandably, the battery pack includes multiple battery modules, each connected to a corresponding module cover 1 via a switch 2. The battery pack also has a housing with a cavity that accommodates the multiple battery modules, the multiple switches 2, and the multiple module covers 1. Because the module cover 1 in this embodiment has a cooling section that conforms to the shape of the switch 2, it cools the switch 2. This allows for timely cooling of the switch 2 when the battery module rapidly heats up and generates significant heat, ensuring the safety performance of the battery pack.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A module cover, applied to a battery pack, characterized in that, include: Cover; A cooling platform is provided along the height direction of the cover body on the side of the cover body facing the battery module. Multiple cooling platforms are provided, and each cooling platform is arranged in a one-to-one correspondence with a battery pack panel. The contact surface of each cooling platform and the battery pack panel is fitted together. Each cooling platform has a cooling cavity, and the cooling cavity is used to inject cooling material to cool the battery pack panel.

2. The module cover according to claim 1, characterized in that, The cooling platform includes: A first cooling section is used to fit the protrusion of the bar sheet, and the first cooling section has a hollow cavity. The second cooling section is provided in two parts, which are located at both ends of the first cooling section. The second cooling section also has a hollow cavity and is connected to the cavity of the first cooling section, together forming the cooling cavity.

3. The module cover according to claim 2, characterized in that, The connection between the first cooling section and the second cooling section is an arc connection.

4. The module cover according to claim 2, characterized in that, The cooling cavity has a phase change material layer, which fills the cavity in the first cooling section and the second cooling section, and the phase change material layers in the first cooling section and the second cooling section are connected to form a whole.

5. The module cover according to claim 2, characterized in that, An annular flow channel is formed inside the cover. The annular flow channel has an injection port and an outlet. The injection port and the outlet are connected to an external cooling device. Coolant is introduced into the flow channel. The multiple cooling chambers are connected to the annular flow channel.

6. The module cover according to claim 5, characterized in that, The area where the cover connects to the cooling platform is provided with a first opening, and the first opening is connected to the cooling cavity formed by the annular flow channel, the first cooling section and the second cooling section.

7. The module cover according to claim 1, characterized in that, A heat-conducting layer is provided between the cooling platform and the plate; The heat-conducting layer is provided in multiple parts, and the shape of each heat-conducting layer is similar to that of each plate.

8. The module cover according to claim 1, characterized in that, The cover and the cooling platform are made of plastic, and a cooling cavity is formed inside the plastic part; Alternatively, the cover and the cooling platform may be made of metal, and the surface of the metal may have an insulating layer.

9. The module cover according to any one of claims 1 to 8, characterized in that, The cover is provided with a clearance hole, which is connected to the exhaust channel of the explosion-proof valve; The cover has multiple clearance holes, which are spaced apart along the length of the cover.

10. A battery pack, characterized in that, Includes a battery module, a battery pack, and a module cover as described in any one of claims 1 to 9; The battery module is provided in multiple ways, and the top cover of each module is connected to the corresponding battery module through the plate.

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