Battery pack and powered device

Abstract

The present disclosure provides a battery pack and an electrical equipment, and relates to the field of batteries. The battery pack comprises a plurality of batteries, a partition plate and a heat exchange plate. The plurality of batteries comprises two rows of batteries arranged side by side along a first direction, and each row of batteries is arranged along a second direction. The partition plate is arranged between the two rows of batteries and is perpendicular to the first direction. The heat exchange plate is arranged on one side of the plurality of batteries in a third direction and is perpendicular to the third direction. The heat exchange plate comprises a spacing portion and two heat exchange portions, the two heat exchange portions are located on opposite sides of the spacing portion in the first direction, the two heat exchange portions cover at least part of the two rows of batteries respectively, the spacing portion covers the partition plate, a heat exchange medium flow channel is arranged in each heat exchange portion, and no heat exchange medium flow channel is arranged in the spacing portion. The second direction is the thickness direction of the plurality of batteries, and the first direction, the second direction and the third direction are perpendicular to each other. The waste of cold energy and the invalid heat dissipation caused by the flow of the heat exchange medium above the partition plate are effectively avoided, and the direct cooling efficiency of the battery is improved.

Description

Technical Field

[0001] This disclosure relates to the field of batteries, and in particular, to a battery pack and an electrical device having the battery pack. Background Technology

[0002] Battery packs typically consist of multiple rows of cells, which are usually physically separated and fixed by separators to enhance structural stability and reduce the risk of thermal runaway propagation.

[0003] However, the separator obstructs the effective heat flow path between the individual cells and the heat exchange plate, causing heat to accumulate between the cells and form localized hot spots. Simultaneously, the contact area between the heat exchange medium within the heat exchange plate and the battery surface is limited; that is, the contact between the heat exchange medium and the separator is only partial, preventing the heat exchange medium from uniformly covering the entire battery surface and reducing the overall heat exchange efficiency of the battery pack. Especially under high-temperature or high-rate discharge conditions, this may exacerbate temperature differences between batteries, accelerate battery aging, and affect the battery pack's lifespan and safety. Utility Model Content

[0004] In view of this, the present disclosure provides a battery pack. It aims to solve the problem that the heat exchange medium cannot uniformly cover the entire battery surface, thus reducing the overall heat exchange efficiency of the battery pack.

[0005] The battery pack includes multiple batteries, separators, and heat exchange plates. The multiple batteries comprise two rows of batteries arranged side-by-side along a first direction, with each row arranged along a second direction. Separators are disposed between the two rows of batteries and perpendicular to the first direction. Heat exchange plates are disposed on one side of the multiple batteries along a third direction and perpendicular to that direction. Each heat exchange plate includes a spacer portion and two heat exchange sections located on opposite sides of the spacer portion along the first direction. The two heat exchange sections each cover at least a portion of the two rows of batteries. The spacer portion covers the separators. Each heat exchange section has a heat exchange medium flow channel, while the spacer portion does not have a heat exchange medium flow channel. The second direction is the thickness direction of the multiple batteries, and the first, second, and third directions are mutually perpendicular.

[0006] According to the above structure, by covering the separator with the spacer portion that has no internal heat exchange medium flow channel onto the separator, that is, by covering the separator with the orthographic projection of the spacer portion on a plane perpendicular to a third direction, and simultaneously covering the two rows of batteries with the two heat exchange portions having heat exchange medium flow channels respectively, the flow path of the heat exchange medium is guided and concentrated in the effective heat exchange area directly above the two rows of batteries. This effectively avoids the waste of cold energy and ineffective heat dissipation that may occur when the heat exchange medium flows over the separator, ensuring that the cold energy of the heat exchange medium can be concentrated to absorb the core heat generated by the battery during charging and discharging, thereby significantly improving the direct cooling efficiency of the battery.

[0007] This disclosure also includes electrical equipment, including the aforementioned battery pack. Attached Figure Description

[0008] It should be understood that the following figures only illustrate certain embodiments of this disclosure and should not be construed as limiting the scope.

[0009] It should be understood that the same or similar reference numerals are used in the accompanying drawings to denote the same or similar elements.

[0010] It should be understood that the accompanying drawings are only schematic, and the dimensions and scales of the elements in the drawings are not necessarily precise.

[0011] Figure 1 This is a schematic diagram of the structure of a battery pack according to an embodiment of the present disclosure.

[0012] Figure 2 for Figure 1 A schematic cross-sectional view of the battery pack.

[0013] Figure 3 for Figure 2 A magnified view of part A in the middle.

[0014] Figure 4 for Figure 1 A schematic cross-sectional view of a battery pack according to another embodiment of the present disclosure.

[0015] Figure 5 for Figure 2 A partial enlarged view of part A according to another embodiment of the present disclosure.

[0016] Figure 6 for Figure 2 A partial enlarged view of part A according to another embodiment of the present disclosure.

[0017] Figure 7 for Figure 2 A partial enlarged view of part A according to another embodiment of the present disclosure.

[0018] Figure 8 This is a partial cross-sectional view of an electrical appliance according to an embodiment of the present disclosure.

[0019] Figure captions: 100—Battery pack; 10, 10a, 10b—Battery; 11—Terminal post; 12—Explosion-proof valve; 20—Separator; 21—Pipe; 30—Heat exchange plate; 31—Spacing section; 32—Heat exchange section; 33—Heat exchange medium flow channel; 40—Heat insulation pad; 50—Box; 200—Electrical equipment, automobile. Detailed Implementation

[0020] Numerous specific details are set forth below to provide an understanding of the structure, function, and use of the embodiments described and illustrated in the specification and figures. It is to be understood that the embodiments described and illustrated herein are non-limiting examples, and thus it will be appreciated that the particular structural and functional details disclosed herein are representative and exemplary. Variations and changes may be made to these embodiments without departing from the scope of the claims.

[0021] <Example Battery Pack> This disclosure provides a battery pack according to one embodiment. (See reference...) Figure 1 The battery pack 100 includes a housing 50 and multiple batteries 10. The multiple batteries 10 are electrically connected to each other to form a battery pack. The housing 50 houses the batteries 10 and the battery management system. The batteries 10 are electrically connected to the battery management system to enable the charging and discharging process of the multiple batteries 10. The housing 50 serves as an external protective structure, typically made of metal or composite materials, and is waterproof, dustproof, and impact-resistant, providing a safe operating environment for the internal components such as the batteries 10 and the battery management system.

[0022] The battery pack 100 may also include a battery group composed of multiple batteries 10 connected in series and parallel, and integrate a battery management system (BMS), a thermal management system, an electrical connection system (high-voltage / low-voltage connectors, wiring harnesses, etc.), structural components (casing, brackets, etc.), and protective components. These components are housed within the enclosure space of the housing 50 and sealed by the top cover of the housing 50, forming a complete functional unit capable of directly outputting electrical energy. The battery pack 100 can serve as a rechargeable battery pack as a power source for new energy vehicles, primarily used for storing and providing electrical energy.

[0023] refer to Figure 1 and Figure 2 , Figure 2 for Figure 1 The battery pack 100 includes two rows of batteries, and also includes a separator 20 and a heat exchange plate 30. A plurality of batteries 10 include two rows of batteries 10a and 10b arranged side-by-side along a first direction, with each row of batteries 10 arranged along a second direction. The separator 20 is disposed between the two rows of batteries 10a and 10b and is perpendicular to the first direction. The heat exchange plate 30 is disposed on one side of the plurality of batteries 10 in a third direction and is perpendicular to the third direction. The heat exchange plate 30 includes a spacer portion 31 and two heat exchange portions 32, located on opposite sides of the spacer portion 31 in the first direction. The two heat exchange portions 32 respectively cover at least a portion of the two rows of batteries 10a and 10b. The spacer portion 31 covers the separator 20. Each heat exchange portion 32 has a heat exchange medium flow channel 33, while the spacer portion 31 does not have a heat exchange medium flow channel 33. The second direction is the thickness direction of the plurality of batteries 10, and the first direction, the second direction, and the third direction are perpendicular to each other.

[0024] For ease of description, in the accompanying drawings of this disclosure, arrows X+ and X- respectively indicate opposite sides in a first direction, arrows Y+ and Y- respectively indicate opposite sides in a second direction, and arrows Z+ and Z- respectively indicate opposite sides in a third direction.

[0025] According to the above structure, by covering the separator 20 with the spacer portion 31 that has no internal heat exchange medium flow channel 33, that is, by covering the separator 20 with the orthographic projection of the spacer portion 31 on a plane perpendicular to the third direction, and by covering the two rows of batteries 10a and 10b with the two heat exchange portions 32 that have heat exchange medium flow channels 33 respectively, the flow path of the heat exchange medium is guided and concentrated in the effective heat exchange area directly above the two rows of batteries 10a and 10b. This effectively avoids the waste of cold energy and ineffective heat dissipation that may occur when the heat exchange medium flows over the separator 20, and ensures that the cold energy of the heat exchange medium can be concentrated to absorb the core heat generated by the battery 10 during charging and discharging, thereby significantly improving the direct cooling efficiency of the battery 10.

[0026] refer to Figure 2 and Figure 3 The dimension of the separator 20 in the first direction is T1, in mm. The shortest distance from the edge of the spacer 31 to the separator 20 in the first direction is D1, in mm, where 0.008 ≤ D1 / T1 ≤ 16. Preferably, 0.5 ≤ D1 / T1 ≤ 15. More preferably, 2 ≤ D1 / T1 ≤ 13. Alternatively, the ratio D1 / T1 can also be 4, 6, 8, 10, or 12. If D1 / T1 is too small, i.e., D1 / T1 is less than 0.008, the effective heat exchange medium flow channel 33 is too far away from the separator 20. The portion of D1 directly above the battery 10, i.e., the spacer 31 in the heat exchange plate 30 without the heat exchange medium flow channel 33, cannot have its heat directly carried away by the heat exchange plate 30. Instead, it is conducted along the first direction to the area below the heat exchange section 32 with the heat exchange medium flow channel 33, resulting in excessive thermal resistance and the formation of local hot spots. If D1 / T1 is too large, i.e., D1 / T1 is greater than 16, the effective heat exchange medium flow channel 33 is too close to the separator 20. In actual assembly, due to errors during assembly, the heat exchange medium flow channel 33 may cover the separator 20. The cold energy in the heat exchange medium flow channel 33 will be ineffectively dissipated by the separator 20, diverting and wasting cooling capacity, resulting in a reduction in the actual cooling capacity used for cooling the battery 10, thereby directly causing a decrease in overall heat exchange efficiency. According to the above ratio range, it can be ensured that the heat exchange section 32 can be effectively covered above the battery 10, eliminating local overheating caused by an excessively wide spacer 31. At the same time, it also maintains the independence of heat exchange for the two rows of batteries 10a and 10b, ensuring cooling efficiency.

[0027] Further, 4mm ≤ T1 ≤ 13mm, preferably 5mm ≤ T1 ≤ 12mm. More preferably, 6mm ≤ T1 ≤ 11mm. Alternatively, the value of T1 can also be 7mm, 8mm, 9mm, or 10mm, etc. 0.1mm ≤ D1 ≤ 64mm, preferably 5mm ≤ D1 ≤ 55mm. More preferably, 10mm ≤ D1 ≤ 50mm. Alternatively, the value of D1 can also be 20mm, 30mm, 35mm, or 40mm, etc.

[0028] refer to Figure 2 The separator 20 may be provided with a heat exchange medium flow channel 33. That is, the heat exchange medium flow channel 33 in the separator 20 can directly cool the side area located between the two rows of batteries 10a and 10b. This can increase the heat exchange area of ​​the battery 10, allowing the coolant to flow simultaneously through the heat exchange plate 30 on the top of the battery 10 and the separator 20 on the side of the battery 10, making the heat exchange of the entire battery pack 100 more balanced. The heat exchange medium can absorb heat from the top and sides of the battery 10 at the same time, improving the temperature uniformity of the battery pack 100 in the first direction, effectively reducing the maximum temperature difference between the batteries 10, and effectively eliminating local hot spots.

[0029] According to the above structure, the dimension of the partition 20 in the first direction is T1, in mm, and the shortest distance from the edge of the partition portion 31 to the partition 20 in the first direction is D1, in mm, where 0.16 ≤ D1 / T1 ≤ 16. Preferably, 1 ≤ D1 / T1 ≤ 15. More preferably, 4 ≤ D1 / T1 ≤ 12. Alternatively, the ratio D1 / T1 can also be 5, 7, 9, or 11, etc. Figure 4 The partition 20 in the middle does not have a heat exchange medium flow channel 33, and there is no heat exchange medium flowing in the area of ​​the battery 10 directly opposite the partition 31. Figure 2 In the embodiment, the partition 20 is provided with a heat exchange medium flow channel 33. Even if the value of D1 / T1 is slightly larger, resulting in no heat exchange medium flowing in the area of ​​the battery 10 facing the partition 31, some of the heat generated by the battery 10 can be carried away through the heat exchange medium flow channel 33 in the partition 20 on the side of the battery 10. The heat is compensated and redundantly backed up by the efficient cooling on the side, thereby eliminating the risk of overheating caused by the increase of D1 / T1.

[0030] Further, 4mm ≤ T1 ≤ 13mm, preferably 5mm ≤ T1 ≤ 12mm. More preferably, 6mm ≤ T1 ≤ 11mm. Alternatively, the value of T1 can also be 7mm, 8mm, 9mm, or 10mm, etc. 2mm ≤ D1 ≤ 64mm, preferably 4mm ≤ D1 ≤ 60mm. More preferably, 20mm ≤ D1 ≤ 45mm. Alternatively, the value of D1 can also be 25mm, 30mm, 35mm, or 40mm, etc.

[0031] refer to Figure 2 and Figure 3 At least one heat exchanger 32 has a heat medium flow channel that is in fluid communication with the heat exchange medium flow channel 33 within the partition 20. Small connecting holes can be made at corresponding positions on the heat exchanger 32 and the partition 20, or a dedicated connecting pipe 21 can be provided to extend the coolant passage from the heat exchanger 30 to the interior of the partition 20. This simplifies the external piping connections of the battery pack 100 and reduces the need for multiple pumps, valves, and other control components, saving costs and reducing weight. Simultaneously, by integrating the heat loads of the top and sides of the battery 10 into the same heat exchange medium loop, the temperature rise of the heat exchange medium directly reflects the overall heat load state of the battery 10.

[0032] refer to Figure 4 The partition 20 does not have a heat exchange medium flow channel 33. The partition 20 can be manufactured in one piece using low-cost processes such as injection molding, without the need to process complex flow channels, and also avoids the problem of sealing the flow channels, thus reducing the cost and manufacturing complexity of the partition 20 itself.

[0033] Continue to refer to Figure 4 The dimension of the partition 20 in the first direction is T1, in mm, and the shortest distance from the edge of the spacer 31 to the partition 20 in the first direction is D1, in mm, where 0.08 ≤ D1 / T1 ≤ 12.5. Preferably, 2 ≤ D1 / T1 ≤ 10. More preferably, 3 ≤ D1 / T1 ≤ 9. Alternatively, the ratio D1 / T1 can also be 4, 5, 6, 7, or 8, etc. Figure 2 In one embodiment, the separator 20 has a heat exchange medium flow channel 33, meaning that no heat exchange medium flows through the area of ​​the battery 10 directly opposite the spacer 31. In this embodiment, the separator 20 does not have a heat exchange medium flow channel 33, and the value of D1 / T1 can be slightly smaller to narrow the distance between the spacer 31 and the separator 20, causing the heat exchange section 32 with the heat exchange medium flow channel 33 to be as close as possible to the edge of the battery 10. This ensures that the top edge areas of the two rows of batteries 10a and 10b can be covered by the effective heat exchange medium flow channel 33, thereby eliminating the potential risk of local overheating caused by an excessively wide spacer 31.

[0034] Further, 4mm ≤ T1 ≤ 13mm, preferably 5mm ≤ T1 ≤ 12mm. More preferably, 6mm ≤ T1 ≤ 11mm. Alternatively, the value of T1 can also be 7mm, 8mm, 9mm, or 10mm, etc. 0.1mm ≤ D1 / ≤ 50mm, preferably 5mm ≤ D1 ≤ 45mm. More preferably, 10mm ≤ D1 ≤ 40mm. Alternatively, the value of D1 can also be 15mm, 20mm, 25mm, or 35mm, etc.

[0035] refer to Figure 2 and Figure 4 The separator 20 is spaced apart from the heat exchange plate 30 in a third-direction orientation. This effectively cuts off the lateral thermal short-circuit path formed between the two rows of batteries 10a and 10b through the contact between the separator 20 and the heat exchange plate 30, thereby ensuring the independence of heat exchange for the batteries 10 on both sides. This allows the heat exchange section 32 to more accurately control the temperature of the battery 10 below it, improving the temperature uniformity of the entire battery pack 100. At the same time, this spacing provides the necessary buffer space for the inherent expansion and contraction of the batteries 10 during charge and discharge cycles, avoiding the direct transfer of expansion force to the heat exchange plate 30 due to the rigidity of the separator 20 against it. This fundamentally prevents the structural deformation or damage that may result from this, enhancing the service life of the battery pack 100.

[0036] refer to Figure 4 and Figure 5 The distance between the separator 20 and the heat exchange plate 30 in the third direction is D2 (in mm), and the dimension of each battery 10 in the third direction is H1 (in mm). 0.0002 ≤ D2 / H1 ≤ 7.9, preferably 0.1 ≤ D2 / H1 ≤ 7.5. More preferably, 2 ≤ D2 / H1 ≤ 6. Alternatively, the ratio D2 / H1 can also be 3, 4, 5, or 5.5. If D2 / H1 is too small, i.e., D2 / H1 is less than 0.0002, the distance between the separator 20 and the heat exchange plate 30 cannot effectively absorb the expansion of the battery 10 during cycling. The battery 10 will press against the separator 20 and the cooling plate, generating excessive mechanical stress. Over time, this may damage the internal structure of the cell, accelerate aging, or even cause an internal short circuit. The stress is transmitted to the heat exchange plate 30, which may cause deformation, damage the internal heat exchange medium flow channel 33, or even lead to leakage. If D2 / H1 is too large, i.e., D2 / H1 is greater than 7.9, the pre-tightening force of the separator 20 on the battery 10 in the first direction is insufficient. When the battery 10 expands during charging and discharging, the expansion force generated inside may cause the battery 10 to bulge locally at the gap of the separator 20, thereby causing local compression of the upper heat exchange plate 30 and resulting in stress concentration. According to the above ratio range, a safe space sufficient to accommodate the expected expansion of the battery 10 is provided, avoiding excessive mechanical stress, ensuring the structural integrity of the battery pack 100, and ensuring the independence and efficiency of heat exchange.

[0037] Further, 0.1mm ≤ D2 ≤ 672mm, preferably 10mm ≤ D2 ≤ 650mm. More preferably, 100mm ≤ D2 ≤ 550mm. Alternatively, the value of D2 can also be 200mm, 300mm, 400mm, or 500mm, etc. 84.9mm ≤ H1 ≤ 684mm, preferably 90mm ≤ H1 ≤ 650mm. More preferably, 150mm ≤ H1 ≤ 550mm. Alternatively, the value of H1 can also be 200mm, 300mm, 400mm, or 500mm, etc.

[0038] refer to Figure 2 and Figure 6 A heat insulation pad 40 is provided between the heat exchange plate 30 and the separator 20. The heat insulation pad 40 provides a buffer between the separator 20 and the heat exchange plate 30, which can not only absorb the small displacements and stresses caused by the expansion and vibration of the battery 10, but also reduce vibration transmission. At the same time, if the gap between the separator 20 and the heat exchange plate 30 decreases or even comes into contact due to manufacturing tolerances or long-term vibration, the heat insulation pad 40 can also effectively block the lateral conduction of heat between the two rows of batteries 10 through the separator 20, thereby improving the temperature uniformity and service life of the battery pack 100.

[0039] Back Figure 2 Each battery 10 has two terminals 11 spaced apart along a first direction on the side facing the heat exchange plate 30 in a third direction. The heat exchange plate 30 covers the terminals 11 of each battery 10 in the two rows of batteries 10a and 10b that are close to the separator 20. By allowing the heat exchange plate 30 to directly cover the terminals 11, the terminals 11 can be actively and efficiently cooled directly, quickly removing heat and preventing the terminals 11 from overheating. This reduces the risk of thermal failure caused by excessive temperature at the terminals 11 and improves the electrical and thermal safety levels of the battery pack 100.

[0040] refer to Figure 2 Each battery 10 is also equipped with an explosion-proof valve 12 on the side facing upwards towards the heat exchange plate 30. The explosion-proof valve 12 is located between the two terminals 11 in the first direction, and the heat exchange plate 30 does not cover the explosion-proof valve 12. The heat exchange plate 30 avoids the explosion-proof valve 12 located between the two terminals 11 to ensure that the pressure relief function of the explosion-proof valve 12 is not limited or failed due to the physical obstruction of the heat exchange plate 30 above the battery 10 in extreme situations such as thermal runaway. At the same time, it provides a channel for the directional drainage of pressure relief ejected material, ensuring that pressure and high-temperature substances can be safely guided to the preset discharge path, thereby maintaining the overall safety of the battery pack 100.

[0041] refer to Figure 2The shortest distance from the heat exchange plate 30 to the explosion-proof valve 12 in the first direction is D3 (in mm), and the dimension of the battery 10 in the first direction is W1 (in mm). 0.0002 ≤ D3 / W1 ≤ 0.125, preferably 0.05 ≤ D3 / W1 ≤ 0.12. More preferably, 0.06 ≤ D3 / W1 ≤ 0.11. Alternatively, the ratio D3 / W1 can also be 0.07, 0.08, 0.09, or 0.1. If D3 / W1 is too small, i.e., less than 0.0002, the edge of the heat exchange plate 30 is too close to the explosion-proof valve 12. When the explosion-proof valve 12 opens, the high-speed, high-temperature airflow and substances it instantly ejects will directly impact the heat exchange plate 30, hindering pressure relief and causing excessively high internal pressure peaks in the battery pack 100. Furthermore, the ejected material may be rebounded and ignite adjacent batteries 10. If D3 / W1 is too large, i.e., D3 / W1 is greater than 0.125, it will reduce the space for the heat exchange medium flow channel 33 within the heat exchange section 32, or cause the overall size of the battery pack 100 in the first direction to increase, reducing the energy density and space compactness of the battery pack 100. Based on the above ratio range, a minimum safe space is provided sufficient for the explosion-proof valve 12 to open smoothly and complete the pressure relief process, while maximizing the coverage area of ​​the heat exchange plate 30 to ensure cooling efficiency.

[0042] Further, 0.1mm ≤ D3 ≤ 18.5mm, preferably 2mm ≤ D3 ≤ 17mm. More preferably, 4mm ≤ D3 ≤ 15mm. Alternatively, the value of D3 can also be 6mm, 8mm, 10mm, or 13mm, etc. 148mm ≤ W1 ≤ 685mm, preferably 180mm ≤ W1 ≤ 640mm. More preferably, 250mm ≤ W1 ≤ 550mm. Alternatively, the value of W1 can also be 300mm, 350mm, 400mm, 450mm, or 500mm, etc.

[0043] refer to Figure 7 The heat exchange plate 30 and the separator 20 are fixedly connected. This ensures that the relative positions of the heat exchange plate 30 and the separator 20 are fixed, preventing gap changes due to vibration or temperature cycling. At the same time, it improves the structural stiffness and stability of the battery 10 in the first direction, i.e., the stacking direction of the battery 10 columns, and in the second direction, providing a more uniform preload force for the battery 10.

[0044] <Example Electrical Equipment> This utility model embodiment also provides an electrical device 200, which may include the battery pack 100 described above.

[0045] By way of example only, electrical equipment 200 can be, but is not limited to, vehicles, ships, aircraft, household appliances, and industrial equipment. For example, vehicles can be passenger cars, trucks, construction vehicles, etc.

[0046] In addition, the electrical equipment 200 can also be used for the storage, conversion and release of recyclable electrical energy.

[0047] In a non-restrictive example, refer to Figure 8 The electrical equipment 200 can be the car 200, and the battery pack 100 can be used as a power source to power the car 200.

[0048] It should be noted that the elements described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0049] It should be understood that multiple components and / or parts can be provided by a single integrated component or part. Alternatively, a single integrated component or part can be divided into multiple separate components and / or parts. The use of the public designation "a" or "an" to describe a component or part does not imply the exclusion of other components or parts.

[0050] It should be understood that although terms such as “first” or “second” may be used in this disclosure to describe various elements (such as a first direction and a second direction), these elements are not defined by these terms, which are only used to distinguish one element from another.

[0051] The basic principles of this disclosure have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this disclosure are merely examples and not limitations, and should not be considered as essential features of each embodiment of this disclosure. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the scope of this disclosure to the necessity of employing the aforementioned specific details for implementation.

[0052] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A battery pack, characterized in that, include: Multiple batteries, including two rows of batteries arranged side by side along a first direction, each row of batteries arranged along a second direction; A partition is disposed between the two rows of batteries and is perpendicular to the first direction; as well as A heat exchange plate is disposed on one side of the plurality of batteries in a third direction, perpendicular to the third direction, and includes a spacer portion and two heat exchange portions. The two heat exchange portions are located on opposite sides of the spacer portion in the first direction. The two heat exchange portions respectively cover at least a portion of the two rows of batteries. The spacer portion covers the separator. Each heat exchange portion has a heat exchange medium flow channel. The spacer portion does not have a heat exchange medium flow channel. The second direction is the thickness direction of the plurality of batteries. The first direction, the second direction, and the third direction are perpendicular to each other.

2. The battery pack according to claim 1, characterized in that, The dimension of the partition in the first direction is T1, in mm, and the shortest distance from the edge of the partition to the partition in the first direction is D1, in mm, where 0.008≤D1 / T1≤16.

3. The battery pack according to claim 2, characterized in that, 4mm≤T1≤13mm, and / or, 0.1mm≤D1≤64mm.

4. The battery pack according to claim 1, characterized in that, The partition plate is provided with a heat exchange medium flow channel.

5. The battery pack according to claim 4, characterized in that, The dimension of the partition in the first direction is T1, in mm, and the shortest distance from the edge of the partition to the partition in the first direction is D1, in mm, where 0.16≤D1 / T1≤16.

6. The battery pack according to claim 5, characterized in that, 4mm≤T1≤13mm, and / or, 2mm≤D1≤64mm.

7. The battery pack according to claim 4, characterized in that, At least one heat exchange section has a heat medium flow channel that is in fluid communication with the heat exchange medium flow channel inside the partition plate.

8. The battery pack according to claim 1, characterized in that, The partition plate does not have a heat exchange medium flow channel.

9. The battery pack according to claim 8, characterized in that, The dimension of the partition in the first direction is T1, in mm, and the shortest distance from the edge of the partition to the partition in the first direction is D1, in mm, where 0.08≤D1 / T1≤12.

5.

10. The battery pack according to claim 9, characterized in that, 4mm≤T1≤13mm, and / or, 0.1mm≤D1 / ≤50mm.

11. The battery pack according to claim 8, characterized in that, The partition is arranged at intervals from the heat exchange plate in the third direction.

12. The battery pack according to claim 11, characterized in that, The distance between the separator and the heat exchange plate in the third direction is D2, in mm, and the dimension of each battery in the third direction is H1, in mm, where 0.0002≤D2 / H1≤7.

9.

13. The battery pack according to claim 12, characterized in that, 0.1mm≤D2≤672mm, and / or, 84.9mm≤H1≤684mm.

14. The battery pack according to claim 8, characterized in that, A heat insulation pad is provided between the heat exchange plate and the partition plate.

15. The battery pack according to claim 1, characterized in that, Each battery has two electrode posts spaced apart along the first direction on the side of the third-party upward-facing side near the heat exchange plate, and the heat exchange plate covers the electrode posts of each battery in the two rows of batteries near the separator.

16. The battery pack according to claim 15, characterized in that, Each battery is also provided with an explosion-proof valve on the side of the third direction near the heat exchange plate. The explosion-proof valve is located between the two poles in the first direction, and the heat exchange plate does not cover the explosion-proof valve.

17. The battery pack according to claim 16, characterized in that, The shortest distance from the heat exchange plate to the explosion-proof valve in the first direction is D3, in mm, and the dimension of the battery in the first direction is W1, in mm, where 0.0002≤D3 / W1≤0.

125.

18. The battery pack according to claim 17, characterized in that, 0.1mm≤D3≤18.5mm, and / or, 148mm≤W1≤685mm.

19. The battery pack according to claim 1, characterized in that, The heat exchange plate and the partition are fixedly connected.

20. An electrical appliance, characterized in that, Includes the battery pack according to any one of claims 1 to 19.

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