Heating device, battery pack, and vehicle

Abstract

The utility model relates to battery heating field discloses heating device, battery pack and carrier. Heating device includes: heating piece, including first heating part, second heating part and third heating part, along first direction, first heating part, second heating part and third heating part are sequentially arranged, along second direction, the size of first heating part and the size of third heating part are all greater than the size of second heating part. The size of first heating part and third heating part in second direction is bigger, can therefore with the battery of battery pack both ends in second direction have bigger coincidence area, thereby can be targeted for the battery of battery pack both ends provide more heat, avoid the temperature of battery pack both ends battery too low. Besides, the size of second heating part in second direction is relatively small, for example can better avoid the area of battery's higher heat in second direction, and only cover the area of battery's lower heat, thereby avoid the problem of energy waste and battery overheating.

Description

Technical Field

[0001] This utility model relates to the field of battery heating technology, specifically to a heating device, a battery pack, and a carrier. Background Technology

[0002] With the rapid development of new energy technologies, batteries, as a core component of energy storage, are highly dependent on operating temperature for their performance. When the ambient temperature is too low, the resistance to ion migration inside the battery increases significantly, leading to a sharp decline in battery charging and discharging performance, which seriously affects the normal use and lifespan of the battery.

[0003] To ensure battery performance in low-temperature environments, heating devices are usually placed on top of the battery pack to keep the battery within a suitable operating temperature range.

[0004] However, in related technologies, heating devices are generally arranged by simply laying them flat on the surface of the battery pack. This simple flat arrangement cannot be adapted to the differentiated heating needs of batteries in different locations within the battery pack, resulting in some batteries not being heated sufficiently while others are overheated. This leads to poor heating performance and unnecessary energy waste. Utility Model Content

[0005] In view of this, the present invention provides a heating device, a battery pack, and a carrier to solve or improve the problem that heating devices in related technologies cannot adapt to the differentiated heating needs of batteries in different locations within a battery pack.

[0006] In a first aspect, this utility model provides a heating device for covering the surface of a battery pack, comprising:

[0007] The heating element includes a first heating part, a second heating part, and a third heating part. Along a first direction, the first heating part, the second heating part, and the third heating part are arranged sequentially. Along a second direction, the size of the first heating part and the size of the third heating part are both larger than the size of the second heating part. The first direction and the second direction intersect.

[0008] In one optional embodiment, the heating device further includes:

[0009] An insulating component includes a first insulating portion, a second insulating portion, and a third insulating portion. Along the first direction, the first insulating portion, the second insulating portion, and the third insulating portion are connected in sequence. The first insulating portion covers the first heating portion, the second insulating portion covers the second heating portion, and the third insulating portion covers the third insulating portion.

[0010] In one optional embodiment, along the second direction, the dimensions of both the first insulating portion and the third insulating portion are larger than the dimensions of the second insulating portion;

[0011] And / or, the number of insulating elements is two, and the heating element is disposed between the two insulating elements and is jointly covered by the two insulating elements.

[0012] In one optional embodiment, along the second direction, the two ends of the first heating part extend beyond the two ends of the second heating part, and the two ends of the third heating part extend beyond the two ends of the second heating part.

[0013] And / or, the first heating part, the second heating part and the third heating part are all heating wires, and the three are connected in series;

[0014] And / or, the second heating part and the first heating part or the third heating part satisfy W1 = nW2; where W1 is the dimension of the second heating part in the second direction, W2 is the dimension of the first heating part or the third heating part in the second direction, and n ranges from 0.6 to 0.9;

[0015] And / or, the second heating element and the battery satisfy W1 = sL; where W1 is the dimension of the second heating element in the second direction, L is the distance between the two end faces of the battery with terminals, and s is in the range of 0.5 to 0.9.

[0016] And / or, the first heating part or the third heating part and the battery satisfy W2≤L; where W2 is the dimension of the first heating part or the third heating part in the second direction, and L is the distance between the two end faces of the battery with terminals.

[0017] Secondly, this utility model also provides a battery pack, comprising:

[0018] Box;

[0019] A battery pack is disposed inside the housing and includes multiple batteries arranged along a first direction. The batteries at both ends of the battery pack abut against the inner wall of the housing. Each battery has a corresponding terminal post at both ends in a second direction, and the terminal post has a gap with the inner wall of the housing.

[0020] The heating device described above covers the top or bottom surface of the battery pack, and the first heating part and the second heating part are respectively disposed opposite to the batteries at both ends of the battery pack.

[0021] In one alternative embodiment, the housing is provided with a cold plate, the heating device is disposed on the cold plate, and the battery pack is disposed on the side of the heating device away from the cold plate.

[0022] In one alternative embodiment, the heating device is bonded or fused to the surface of the cold plate, and the battery pack is bonded or fused to the surface of the heating device away from the cold plate.

[0023] And / or, the portion of the battery pack extending beyond the second heating section along the second direction is bonded or fused to the cold plate.

[0024] In one alternative embodiment, the number of battery packs is at least two, and the at least two battery packs are arranged along the second direction, each battery pack being provided with a corresponding heating device;

[0025] Alternatively, the housing may be provided with a partition beam extending along the first direction, which divides the housing into at least two accommodating cavities, each of which is provided with a corresponding battery pack, and each of the battery packs is provided with a corresponding heating device.

[0026] In one alternative implementation, the heating devices are connected in series.

[0027] Thirdly, this utility model also provides a carrier, including the heating device as described above or the battery pack as described above.

[0028] In this invention, the heating device has a larger first heating part and a larger third heating part in the second direction, which allows it to have a larger overlap area with the batteries at both ends of the battery pack in the second direction. This enables it to provide more heat to the batteries at both ends of the battery pack in a targeted manner, thus preventing the batteries at both ends of the battery pack from getting too cold.

[0029] In addition, the second heating element is relatively small in size in the second direction, which can better avoid areas of the battery with high heat, such as areas a and c of the battery, and only cover areas of the battery with low heat, such as area b of the battery, thereby avoiding energy waste and battery overheating problems.

[0030] The battery pack and carrier provided by this utility model include all the advantages of the heating device mentioned above. Attached Figure Description

[0031] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific 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.

[0032] Figure 1 An exploded view of the structure of a battery pack provided in an embodiment of this utility model;

[0033] Figure 2 An exploded view of another battery pack structure provided in this embodiment of the present invention;

[0034] Figure 3 A schematic diagram of a heating element covering the surface of a battery pack, provided by an embodiment of this utility model;

[0035] Figure 4 This is a schematic diagram of another heating element covering the surface of the battery pack, provided by an embodiment of the present invention.

[0036] Figure 5 A schematic diagram of a heating element disposed on a cold plate of a box body, provided for an embodiment of this utility model;

[0037] Figure 6 A schematic diagram of the force distribution of the battery pack inside the housing, provided for an embodiment of this utility model;

[0038] Figure 7 This is a schematic diagram of the structure of a heating device provided in an embodiment of the present utility model;

[0039] Figure 8 This is a schematic diagram of the structure of a battery provided for an embodiment of the present utility model.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1. Heating device; 101. Heating element; 1011. First heating section; 1012. Second heating section; 1013. Third heating section; 102. Insulating element; 1021. First insulating section; 1022. Second insulating section; 1023. Third insulating section; 2. Battery pack; 201. Battery; 2011. Terminal post; 3. Housing; 301. Receiving cavity; 302. Separating beam; 4. Cold plate; 5. Adhesive layer; X, First direction; Y, Second direction; Z, Third direction. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments 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.

[0043] In related technologies, heating devices are generally arranged by simply laying them flat on the surface of the battery pack. This simple flat arrangement cannot adapt to the different heating needs of batteries in different locations within the battery pack, which may result in some batteries not being heated sufficiently while others are overheated. This leads to poor heating effect and unnecessary waste of energy.

[0044] Specifically, refer to Figure 8 As shown, for a single battery 201, both ends of the battery 201 are provided with corresponding terminals 2011, one of which is the positive terminal 2011 and the other is the negative terminal 2011. The battery 201 is elongated in shape.

[0045] The overall elongated shape of the battery refers to the fact that the length of a single battery cell is significantly greater than its width. For example, when the length-to-width ratio of battery cell 201 is ≥2.5, i.e., L≥2.5·W, the portions at both ends of battery cell 201... Figure 8 Regions a and c have relatively higher current densities, resulting in higher heat generation and temperatures. These regions are referred to as the high-temperature end regions. Region b, on the other hand, has relatively lower heat generation and temperatures, referred to as the low-temperature middle region. The aspect ratios of the battery cells mentioned above are for illustrative purposes only and are not strict limitations. The actual width of the battery cells may vary depending on actual needs or thickness design. The main point is to describe the differences in current and temperature between the two ends and the middle region during the use of a long, narrow battery.

[0046] When the battery pack is charged and discharged in a low-temperature environment, regions a and c are warmer than the central region b, so there is no need for additional heating. However, the heating device 1 in the related technology heats regions a and b, which may lead to excessively high temperatures in regions a and b, or energy waste.

[0047] refer to Figure 1 and Figure 3 As shown, for battery pack 2, battery pack 2 is disposed inside the housing 3 of the battery pack. The two ends of the battery 201 with terminals 2011 are spaced apart from the inner wall of the housing 3, thereby preventing the battery 201 from being squeezed during a side collision of the vehicle. For example, see reference... Figure 3As shown, the spacing is P. Due to the presence of the spacing, the two ends of the battery 201 with the terminal posts 2011 are not easily conductive to the casing 3, thereby providing a higher heat preservation effect for the two ends of the battery 201.

[0048] Both ends of the battery pack 2, specifically the batteries 201, need to be pressed against the inner wall of the housing 3 to constrain their expansion during operation. Because the batteries 201 are pressed against the housing 3, in low-temperature environments, external cold air can easily be transferred directly to the batteries 201 at both ends of the battery pack 2 through the housing 3, resulting in excessively low temperatures for the batteries 201. Related technologies do not provide targeted heating for the batteries 201 at both ends of the battery pack 2, leading to poor heating performance.

[0049] In order to solve or improve the problem that heating devices in related technologies cannot adapt to the different heating needs of batteries in different locations in the battery pack, this utility model provides a heating device 1, a battery pack and a carrier.

[0050] The following is combined with Figures 1 to 8 The present invention describes the heating device 1 provided in the embodiments of the present invention.

[0051] Specifically, the heating device 1 is used to cover the surface of the battery pack 2. See reference [link to documentation]. Figure 1 and Figure 2 As shown, the battery pack 2 includes a plurality of batteries 201 arranged in sequence. Each end of the battery 201 is provided with a corresponding terminal post 2011. The orientation of the terminal post 2011 intersects with the arrangement direction of the battery 201. The heating device 1 is used to cover the top or bottom surface of the battery pack 2.

[0052] The heating device 1 includes a first heating part 1011, a second heating part 1012, and a third heating part 1013. The first heating part 1011, the second heating part 1012, and the third heating part 1013 are arranged sequentially along the first direction X. For example, the first heating part 1011, the second heating part 1012, and the third heating part 1013 can be connected sequentially along the first direction X.

[0053] Along the second direction Y, the dimensions of both the first heating element 1011 and the third heating element 1013 are larger than the dimension of the second heating element 1012. In other words, the dimension of the first heating element 1011 in the second direction Y is larger than the dimension of the second heating element 1012 in the second direction Y, and the dimension of the third heating element 1013 in the second direction Y is larger than the dimension of the second heating element 1012 in the second direction Y. The first direction X and the second direction Y intersect, for example, the first direction X and the second direction Y are perpendicular.

[0054] In this embodiment, reference is made to Figures 1-4As shown, during use, the heating element 101 covers the top or bottom surface of the battery pack 2. For example, multiple batteries 201 of the battery pack 2 are arranged sequentially along the first direction X, and the heating element 101 extends along the first direction X and covers the top or bottom surface of the battery pack 2.

[0055] The first heating element 1011 and the third heating element 1013 are respectively opposite to the batteries 201 at both ends of the battery pack 2. For example, the first heating element 1011 is opposite to at least one battery 201 at the first end of the battery pack 2, and the third heating element 1013 is opposite to at least one battery 201 at the second end of the battery pack 2. The second heating element 1012 is opposite to the battery 201 between the first end and the second end of the battery pack 2.

[0056] With this configuration, the first heating part 1011 and the third heating part 1013 are larger in the second direction Y, so they can have a larger overlap area with the batteries 201 at both ends of the battery pack 2 in the second direction Y. This allows for targeted provision of more heat to the batteries 201 at both ends of the battery pack 2, preventing the batteries 201 at both ends of the battery pack 2 from getting too cold.

[0057] Furthermore, the second heating part 1012 has a relatively small size in the second direction Y. For example, it can better avoid the high-temperature end regions of the battery 201, such as regions a and c of the battery 201, and only cover the low-temperature middle regions of the battery 201, such as region b of the battery 201, thereby avoiding energy waste and overheating of the battery 201.

[0058] In addition, with the heating device 1 located at the bottom of the battery pack 2, the heating device 1 is mounted on the cold plate 4 inside the housing 3, and the battery pack 2 is located on the side of the heating device 1 away from the cold plate 4. With this arrangement, the heating element 101 is mounted on the surface of the cold plate 4, which can achieve a uniform temperature effect on the heating element 101 through the cold plate 4, avoiding the problem of local overheating or dry burning of the heating element 101.

[0059] Furthermore, since the second heating part 1012 has a smaller size in the second direction Y, it can avoid the high-temperature areas at the end of the battery 201, such as areas a and b. This means that the areas of the battery 201 with high heat do not need to exchange heat with the cold plate 4 through the heating device 1, but can directly transfer heat with the cold plate 4, thereby reducing the thermal resistance between the battery 201 and the cold plate 4 and improving the heat exchange efficiency between the cold plate 4 and the battery 201.

[0060] Meanwhile, the second heating section 1012 avoids the high-temperature area at the end of the battery, allowing the high-temperature area at the end of the battery to be directly connected to the cold plate, thereby improving the stability of the battery.

[0061] It is understood that the heating device 1 in this application is more suitable for elongated battery 201, and both ends of battery 201 are provided with corresponding terminals 2011; for example Figure 8 As shown, the length-to-width ratio of battery cell 201 is ≥2.5, i.e., L≥2.5·W. Thus, by appropriately lengthening the battery cell, the assembly efficiency of the battery cell into the whole pack can be effectively improved, thereby achieving increased energy density and reduced cost.

[0062] Furthermore, the height and width of the battery satisfy the condition that 2.5 W ≥ H, according to the reference. Figure 1 As shown, H is the height of the battery, that is, the size of the battery in the third direction Z. The first direction, the second direction and the third direction intersect each other, for example, perpendicularly.

[0063] In some embodiments provided by this utility model, the heating device 1 further includes an insulating member 102. For example, the insulating member 102 may be an insulating film, preferably a thermally conductive insulating film. The insulating member 102 includes a first insulating portion 1021, a second insulating portion 1022, and a third insulating portion 1023. For example, the first insulating portion 1021, the second insulating portion 1022, and the third insulating portion 1023 are different film segments.

[0064] Along the first direction X, a first insulating part 1021, a second insulating part 1022, and a third insulating part 1023 are connected in sequence. The first insulating part 1021 covers the first heating part 1011, the second insulating part 1022 covers the second heating part 1012, and the third insulating part 1023 covers the third heating part 1013.

[0065] In this embodiment, the insulating component 102 covers each heating part, which can isolate the heating device 1 from the battery pack 2, avoid short circuit or electrical failure of the battery 201 due to leakage of the heating part, and improve the safety of the battery pack.

[0066] In some embodiments provided by this utility model, along the second direction Y, the dimensions of the first insulating portion 1021 and the third insulating portion 1023 are both larger than the dimension of the second insulating portion 1022. That is, the dimension of the first insulating portion 1021 in the second direction Y is larger than the dimension of the second insulating portion 1022 in the second direction Y, and the dimension of the third insulating portion 1023 in the second direction Y is larger than the dimension of the second insulating portion 1022 in the second direction Y.

[0067] This design allows each insulating part to be adapted to the size of the corresponding heating part. For example, the first insulating part 1021 and the third insulating part 1023 are larger in size, which can better cover the first heating part 1011 and the third heating part 1013, enhancing insulation protection. The second insulating part 1022 is smaller in size, which can avoid the high temperature area of ​​the battery 201, allowing the battery pack 2 to directly contact or connect with the cold plate 4 for heat exchange, and reducing the redundancy of insulating materials. This not only ensures safety and optimizes costs, but also facilitates precise temperature control and avoids local overheating.

[0068] In some embodiments provided by this utility model, there are two insulating elements 102, and the heating element 101 is disposed between the two insulating elements 102 and is covered by both insulating elements 102. Furthermore, the two insulating elements 102 are connected, for example, the insulating elements 102 can be bonded or heat-fused together.

[0069] In this embodiment, two insulating components 102 enclose the heating component 101 to form a sandwich composite structure, which effectively isolates the heating component 101 from the battery pack 2 or other components, reduces the risk of leakage, and improves electrical safety.

[0070] In some embodiments provided by this utility model, along the second direction Y, the two ends of the first heating part 1011 extend beyond the two ends of the second heating part 1012, and the two ends of the third heating part 1013 extend beyond the two ends of the second heating part 1012. Alternatively, the heating element 101 is generally in the shape of an I-beam.

[0071] In this embodiment, the first heating part 1011 and the third heating part 1013 extend beyond both ends of the second heating part 1012 in the second direction Y, making the heating area at both ends of the heating element 101 larger. This can specifically compensate for the additional heat loss of the batteries 201 at both ends of the battery pack 2 and improve the overall temperature control uniformity. Meanwhile, the second heating part 1012 in the middle is narrowed, which can only cover the low-temperature area in the middle of the battery 201, avoiding overheating of the high-temperature area at the end of the battery 201 and reducing energy waste.

[0072] Meanwhile, with the heating element 101 positioned between the battery pack 2 and the cold plate 4, by narrowing the second heating section 1012 in the middle, the portion of the battery pack 2 extending beyond the second heating section 1012 can directly exchange heat with or be directly connected to the cold plate 4, thereby improving the cooling and heat exchange efficiency between the battery pack 2 and the cold plate 4, as well as the connection strength between the battery pack 2 and the cold plate 4.

[0073] Furthermore, along the second direction Y, the two ends of the first insulating part 1021 extend beyond the two ends of the second insulating part 1022, and the two ends of the third insulating part 1023 extend beyond the two ends of the second insulating part 1022. In other words, the insulating member 102 has an overall I-shaped structure, thereby adapting to the structure of the heating member 101.

[0074] In this embodiment, the insulating member 102 can fit the contour of the heating member 101 to ensure that each heating part of the heating member 101 is completely covered, and there is no redundancy of insulating material, thereby reducing the cost of the insulating member 102.

[0075] Furthermore, with the heating element 101 positioned between the battery pack 2 and the cold plate 4, the second insulating portion 1022 of the insulating element 102 narrows, allowing the portion of the battery pack 2 extending beyond the second insulating portion 1022 in the second direction Y to directly exchange heat with or connect to the cold plate 4. In other words, the second insulating portion 1022 will not interfere with the direct heat exchange or direct connection between the battery pack 2 and the cold plate 4.

[0076] In some embodiments provided by this utility model, the first heating part 1011, the second heating part 1012, and the third heating part 1013 are all heating wires, and the three are connected in series. For example, the first heating part 1011, the second heating part 1012, and the third heating part 1013 can be different segments of the same heating wire. Specifically, the heating wire is an electric heating wire.

[0077] In this embodiment, the heating element 101 is configured as a series structure, eliminating the need for complex individual control circuits, reducing design complexity and failure risk, and improving the stability of the heating device 1. Simultaneously, the consistent current in the series structure ensures synchronized heating power across all heating elements, facilitating uniform control of the overall heating temperature through unified current adjustment.

[0078] In addition, designing the heating element 101 as a single-piece heating wire reduces the number of connection points, lowers contact resistance and the risk of failure, and improves heating stability. Furthermore, a single heating wire can be bent into shape, avoiding multi-segment welding and improving production efficiency and reliability.

[0079] Optionally, refer to Figure 3 As shown, along the extension path of the heating wire, the heating wire can sequentially form a first heating section 1011, a second heating section 1012, and a third heating section 1013.

[0080] Alternatively, you can refer to... Figure 4 As shown, along the extension path of the heating wire, the heating wire first forms a part of the first heating section 1011, then a part of the second heating section 1012, then a part of the third heating section 1013, then a part of the second heating section 1012, then a part of the first heating section 1011, and so on, until the complete first heating section 1011, second heating section 1012 and third heating section 1013 are formed.

[0081] Of course, the first heating element 1011, the second heating element 1012, and the third heating element 1013 are not limited to heating wires. In other embodiments, the first heating element 1011, the second heating element 1012, and the third heating element 1013 can also be configured as heating tubes. For example, a heating medium, such as heat-conducting oil, water, or steam, can be introduced into the heating tube. Alternatively, an electric heating wire can be provided inside the heating tube. Obviously, the heating tube can be made of an insulating material.

[0082] Alternatively, the first heating part 1011, the second heating part 1012 and the third heating part 1013 can also be configured as heating plates, and a heating medium, such as heat transfer oil, water or steam, can be introduced into the interior of the heating plates.

[0083] refer to Figure 4 As shown, in some embodiments provided by this utility model, the second heating part 1012 and the first heating part 1011 or the third heating part 1013 satisfy W1 = nW2.

[0084] Wherein, W1 is the dimension of the second heating part 1012 in the second direction Y, W2 is the dimension of the first heating part 1011 or the third heating part 1013 in the second direction Y, and n ranges from 0.6 to 0.9, for example, n can be, but is not limited to, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85 or 0.9.

[0085] In this embodiment, the second heating element 1012 can better adapt to the low-temperature requirements of the central low-temperature region of the battery 201, avoiding overheating of the high-temperature end region of the battery 201 and reducing energy waste. By adjusting the n-value, the width of the heating area can be made to better match the temperature distribution curve of the battery 201, improving the overall temperature consistency of the battery pack 2 and optimizing charge and discharge performance.

[0086] In addition, reducing the size of the second heating section 1012 can reduce the amount of heating wire used and lower costs; at the same time, it can avoid ineffective heating and improve the system's energy efficiency ratio.

[0087] refer to Figure 4 and Figure 8 As shown, in some embodiments provided by this utility model, the second heating part 1012 and the battery 201 satisfy W1 = sL.

[0088] Wherein, W1 is the dimension of the second heating part 1012 in the second direction Y, L is the distance between the two end faces of the battery 201 where the electrode post 2011 is provided, and s ranges from 0.5 to 0.9. For example, s can be, but is not limited to, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85 or 0.9.

[0089] In this embodiment, the size of the second heating part 1012 is designed proportionally to the length of the battery 201, so that the heating area is more closely aligned with the temperature gradient of the battery 201. This allows for more precise coverage of the low-temperature zone in the middle of the battery 201, preventing overheating of the high-temperature zone at the end of the battery 201 and reducing heat loss and ineffective power consumption.

[0090] refer to Figure 4 and Figure 8 As shown, in some embodiments provided by this utility model, the first heating part 1011 or the third heating part 1013 and the battery 201 satisfy W2≤L.

[0091] Wherein, W2 is the dimension of the first heating part 1011 or the third heating part 1013 in the second direction Y, and L is the distance between the two end faces of the battery 201 where the electrode post 2011 is provided.

[0092] In this embodiment, this configuration can limit the dimensions of the first heating part 1011 and the third heating part 1013 from exceeding the battery 201 along the second direction Y, thus preventing the first heating part 1011 or the second heating part 1012 from extending to the outer side of the end face of the battery 201 and causing dry burning or energy waste.

[0093] refer to Figure 3 and Figure 4 As shown, this utility model embodiment also provides a battery pack.

[0094] Specifically, the battery pack includes a housing 3, a battery pack 2, and a heating device 1 as described above.

[0095] The battery pack 2 is disposed inside the housing 3, and the battery pack 2 includes a plurality of batteries 201 arranged along a first direction X. Optionally, when the battery pack is applied to a vehicle, the first direction X is the front-rear direction of the vehicle.

[0096] The batteries 201 at both ends of the battery pack 2 abut against the inner wall of the casing 3, for example, with Figure 4 For example, in the figure, the battery 201 at the left end of the battery pack 2 abuts against the inner left wall of the box 3, and the battery 201 at the right end of the battery pack 2 abuts against the inner right wall of the box 3.

[0097] The battery 201 has corresponding terminals 2011 at both ends in the second direction Y, that is, one terminal 2011 is the positive terminal and the other terminal 2011 is the negative terminal. Each terminal 2011 has a gap between it and the inner wall of the housing 3, for example, [missing information]. Figure 4 For example, in the figure, the upper terminal post 2011 of the battery 201 has a gap with the upper inner wall of the box 3, and the lower terminal post 2011 of the battery 201 has a gap with the inner partition beam 302 of the box 3.

[0098] Heating device 1 covers the top or bottom surface of battery pack 2, and the first heating part 1011 and the second heating part 1012 are respectively disposed opposite to the batteries 201 at both ends of battery pack 2. For example, refer to Figure 3 and Figure 4 As shown, the first heating element 1011 is opposite to at least one battery 201 at the first end of the battery pack 2, and the third heating element 1013 is opposite to at least one battery 201 at the second end of the battery pack 2. The second heating element 1012 is opposite to the battery 201 between the first and second ends of the battery pack 2.

[0099] With this configuration, the first heating part 1011 and the third heating part 1013 are larger in the second direction Y, so they can have a larger overlap area with the batteries 201 at both ends of the battery pack 2 in the second direction Y. This allows for targeted provision of more heat to the batteries 201 at both ends of the battery pack 2, preventing the batteries 201 at both ends of the battery pack 2 from getting too cold.

[0100] Furthermore, the second heating part 1012 has a relatively small size in the second direction Y. For example, it can better avoid the high-temperature end regions of the battery 201, such as regions a and c of the battery 201, and only cover the low-temperature middle regions of the battery 201, such as region b of the battery 201, thereby avoiding energy waste and overheating of the battery 201.

[0101] Furthermore, the battery 201 has a gap between its two ends with the terminals 2011 and the inner wall of the housing 3, which prevents the battery 201 from being squeezed during a side collision. Simultaneously, due to this gap, the two ends of the battery 201 with the terminals 2011 and the housing 3 are less likely to conduct heat, thus providing better insulation for the battery 201. Both ends of the battery 201 in the battery pack 2 abut against the inner wall of the housing 3, which helps to constrain the expansion of the battery 201 during operation.

[0102] In some embodiments of this utility model, a cold plate 4 is provided inside the housing 3, a heating device 1 is disposed on the cold plate 4, and the battery pack 2 is disposed on the side of the heating device 1 away from the cold plate 4. The cold plate 4 can be a liquid-cooled plate. Optionally, the cold plate 4 can be disposed on the bottom wall of the housing 3, and correspondingly, the heating device 1 is disposed on the bottom surface of the battery pack 2. Of course, the cold plate 4 can also be disposed on the cover plate of the housing 3, and correspondingly, the heating device 1 is disposed on the top surface of the battery pack 2.

[0103] In this embodiment, by bringing the heating device 1 into contact with the cold plate 4, the cold plate 4 can create a uniform temperature effect on the heating device 1, thus avoiding the problem of local overheating or dry burning of the heating device 1.

[0104] Furthermore, since the second heating part 1012 has a smaller size in the second direction Y, it can avoid the high-temperature areas at the end of the battery 201, such as areas a and b. That is, the high-temperature areas at the end of the battery 201 can extend beyond the second heating part 1012 in the second direction Y and directly contact the cold plate 4 for heat transfer, thereby reducing the thermal resistance between the battery 201 and the cold plate 4, improving the heat exchange efficiency between the cold plate 4 and the battery 201, and ensuring the cooling effect on the areas of the battery 201 with high heat.

[0105] refer to Figure 1 and Figure 2 As shown, in some embodiments of this utility model, the heating device 1 is bonded to the surface of the cold plate 4, for example, an adhesive layer 5 is provided between the heating device 1 and the cold plate 4. Specifically, an adhesive layer 5 is provided between the insulating component 102 of the heating device 1 and the cold plate 4. Of course, the heating device 1 can also be fused to the cold plate 4, specifically, the insulating component 102 of the heating device 1 is fused to the cold plate 4.

[0106] The battery pack 2 is bonded to the surface of the heating device 1 away from the cold plate 4. For example, an adhesive layer 5 is provided between the heating device 1 and the battery pack 2. Specifically, an adhesive layer 5 is provided between the insulating component 102 of the heating device 1 and the battery pack 2. Of course, the surface of the heating device 1 away from the cold plate 4 can also be fused to the battery pack 2. Specifically, the insulating component 102 of the heating device 1 is fused to the battery pack 2.

[0107] In this embodiment, by connecting the battery pack 2, the heating device 1, and the cold plate 4 in sequence, the displacement of components caused by vibration or impact can be reduced, thereby improving the overall structural reliability.

[0108] In some embodiments provided by this utility model, the portion of the battery pack 2 extending beyond the second heating part 1012 along the second direction Y is connected to the cold plate 4. For example, the battery pack 2 is bonded to the cold plate 4, or the outside of the battery 201 in the battery pack 2 may be covered with an insulating film, which may be bonded or fused to the cold plate 4.

[0109] In this embodiment, by directly connecting the battery pack 2 to the cold plate 4, the heat exchange efficiency between the battery pack 2 and the cold plate 4 can be improved, ensuring the cooling effect of the cold plate 4 on the battery pack 2.

[0110] On the other hand, reference Figure 4 and Figure 6 As shown, when multiple batteries 201 are stacked to form a battery pack 2 and fixed inside the housing 3 by adhesive bonding, under conditions such as mechanical vibration, impact, and collision, the adhesive used to fix the battery 201 modules will preferentially fail along the edge area of ​​the battery pack 2, i.e. Figure 6 Stress concentration areas in the middle.

[0111] In this embodiment, the second heating part 1012 has a relatively small size in the second direction Y, which can avoid the stress concentration area, so that the part of the battery pack 2 in the stress concentration area can be directly connected to the cold plate 4, thereby ensuring the connection strength between the battery pack 2 and the cold plate 4, which is not affected by the strength and adhesiveness of the heating device 1.

[0112] In some embodiments provided by this utility model, the number of battery packs 2 is at least two, and the at least two battery packs 2 are arranged along the second direction Y, and each battery pack 2 is provided with a corresponding heating device 1. Optionally, the heating devices 1 of each battery pack 2 are connected in series.

[0113] In this embodiment, the heating devices 1 connected in series with each battery pack 2 reduce the complexity of wiring ports and control circuits, lowering the difficulty and cost of circuit layout. A single power supply loop enables synchronous switching and power adjustment of multiple heating devices 1, facilitating centralized management of the temperature control system and improving control efficiency. Consistent current in the series circuit avoids current unevenness caused by differences in the parameters of the heating devices 1, ensuring consistent heating power across each battery pack 2.

[0114] In some embodiments provided by this utility model, the housing 3 is provided with a partition beam 302 extending along the first direction X. The partition beam 302 divides the housing 3 into at least two receiving cavities 301. Each receiving cavity 301 is provided with a corresponding battery pack 2, and each battery pack 2 is provided with a corresponding heating device 1. Optionally, the heating devices 1 of each battery pack 2 are connected in series.

[0115] In this embodiment, the partition beam 302 divides the housing 3 into independent receiving cavities 301, which can reduce temperature interference between batteries 201 in different areas. At the same time, the independent receiving cavity 301 can limit the spread of a single battery pack 2 failure (such as thermal runaway).

[0116] In addition, the partition beam 302 extends along the first direction X, which can not only enhance the structural strength of the box 3, but also guide the orderly arrangement of the battery pack 2 and the heating device 1, adapt to modular assembly, and improve space utilization.

[0117] Furthermore, connecting the heating devices 1 in series with each battery pack 2 reduces the complexity of wiring ports and control circuits, lowering the difficulty and cost of circuit layout. Achieving synchronous on / off switching and power adjustment of multiple heating devices 1 through a single power circuit facilitates centralized management of the temperature control system and improves control efficiency. Consistent current in the series circuit avoids current unevenness caused by differences in the parameters of the heating devices 1, ensuring consistent heating power across each battery pack 2.

[0118] This utility model also provides a vehicle in its embodiments.

[0119] Specifically, the vehicle includes the heating device 1 as described above or the battery pack as described above.

[0120] It should be noted that the vehicle includes a heating device 1 or a battery pack, which also includes the corresponding advantages, so this will not be elaborated further.

[0121] Furthermore, the vehicles described in this application include, but are not limited to, vehicles, aircraft, and ships. Among them, vehicles include, but are not limited to, pure electric vehicles and hybrid vehicles.

[0122] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A heating device, characterized in that, For covering the surface of the battery pack (2), including: The heating element (101) includes a first heating part (1011), a second heating part (1012) and a third heating part (1013). Along a first direction (X), the first heating part (1011), the second heating part (1012) and the third heating part (1013) are arranged sequentially. Along a second direction (Y), the size of the first heating part (1011) and the size of the third heating part (1013) are both larger than the size of the second heating part (1012). The first direction (X) and the second direction (Y) intersect.

2. The heating device according to claim 1, characterized in that, The heating device (1) further includes: An insulating member (102) includes a first insulating part (1021), a second insulating part (1022), and a third insulating part (1023). Along the first direction (X), the first insulating part (1021), the second insulating part (1022), and the third insulating part (1023) are connected in sequence. The first insulating part (1021) covers the first heating part (1011), the second insulating part (1022) covers the second heating part (1012), and the third insulating part (1023) covers the third insulating part (1023).

3. The heating device according to claim 2, characterized in that, Along the second direction (Y), the dimensions of the first insulating portion (1021) and the third insulating portion (1023) are both larger than the dimensions of the second insulating portion (1022); And / or, the number of the insulating elements (102) is two, and the heating element (101) is disposed between the two insulating elements (102) and is covered by the two insulating elements (102).

4. The heating device according to any one of claims 1-3, characterized in that, Along the second direction (Y), the two ends of the first heating part (1011) extend beyond the two ends of the second heating part (1012), and the two ends of the third heating part (1013) extend beyond the two ends of the second heating part (1012). And / or, the first heating part (1011), the second heating part (1012) and the third heating part (1013) are all heating wires, and the three are connected in series; And / or, the second heating part (1012) and the first heating part (1011) or the third heating part (1013) satisfy W1 = nW2; where W1 is the size of the second heating part (1012) in the second direction (Y), W2 is the size of the first heating part (1011) or the third heating part (1013) in the second direction (Y), and n ranges from 0.6 to 0.9; And / or, the second heating part (1012) and the battery (201) satisfy W1 = sL; where W1 is the size of the second heating part (1012) in the second direction (Y), L is the distance between the two end faces of the battery (201) where the terminal post (2011) is provided, and s is in the range of 0.5 to 0.

9. And / or, the first heating part (1011) or the third heating part (1013) and the battery (201) satisfy W2≤L; wherein, W2 is the dimension of the first heating part (1011) or the third heating part (1013) in the second direction (Y), and L is the distance between the two end faces of the battery (201) where the terminal post (2011) is located.

5. A battery pack, characterized in that, include: Box (3); A battery pack (2) is provided inside the housing (3) and includes a plurality of batteries (201) arranged along a first direction (X), wherein each battery (201) has a corresponding terminal post (2011) at both ends in a second direction (Y); The heating device (1) as described in any one of claims 1-4 covers the top or bottom surface of the battery pack (2), wherein the first heating part (1011) and the second heating part (1012) are respectively disposed opposite to the batteries (201) at both ends of the battery pack (2).

6. The battery pack according to claim 5, characterized in that, The housing (3) is provided with a cold plate (4), the heating device (1) is disposed on the cold plate (4), and the battery pack (2) is disposed on the side of the heating device (1) away from the cold plate (4).

7. The battery pack according to claim 6, characterized in that, The heating device (1) is bonded or fused to the surface of the cold plate (4), and the battery pack (2) is bonded or fused to the surface of the heating device (1) away from the cold plate (4); And / or, the portion of the battery pack (2) extending beyond the second heating section (1012) along the second direction (Y) is bonded or fused to the cold plate (4).

8. The battery pack according to any one of claims 5-7, characterized in that, The number of battery packs (2) is at least two, and at least two battery packs (2) are arranged along the second direction (Y), and each battery pack (2) is provided with a corresponding heating device (1); Alternatively, the housing (3) may be provided with a partition beam (302) extending along the first direction (X), the partition beam (302) dividing the housing (3) into at least two receiving cavities (301), each receiving cavity (301) being provided with a corresponding battery pack (2), and each battery pack (2) being provided with a corresponding heating device (1).

9. The battery pack according to claim 8, characterized in that, Each of the heating devices (1) is connected in series.

10. A vehicle, characterized in that, It includes the heating device (1) as described in any one of claims 1-4 or the battery pack as described in any one of claims 5-9.

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