Battery pack and battery bank

Abstract

The utility model discloses a kind of battery pack and battery pack, including multiple battery monomer along first direction stacked arrangement;First fixed band and second fixed band are arranged along the height direction of the battery monomer with interval;The first fixed band is close to the top of the battery monomer and is arranged, the second fixed band is close to the bottom of the battery monomer and is arranged, the first fixed band is rigid material, and the second fixed band is flexible insulating material quality.The battery pack and battery pack of the utility model, by setting two fixed bands of different material quality, fasten battery monomer, both ensure the tightening fixing of battery pack, reduce fastening cost, reduce the wear and tear of fixed band to battery monomer surface.

Description

Technical Field

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

[0002] A battery pack is generally a modular unit formed by combining multiple battery cells in series, parallel, or other ways. During transportation, installation, or use, battery packs may be subjected to various impacts and vibrations. By packaging and securing the battery pack, the position of the battery cells can be kept unchanged, preventing the battery cells from moving inside the battery pack or undergoing deformation that would impair performance, thus improving the overall integrity and durability of the battery pack.

[0003] In existing technologies, battery packs have end plates at both ends along the stacking direction. To ensure the stability of the battery pack, strapping is typically used to tighten and secure it. The bottom of the battery pack has a limiting structure on the base plate of the housing, which can limit the expansion and deformation of the battery pack to some extent. However, the upper area of ​​the battery pack has no other constraints and mainly relies on the strapping for restraint. Currently, two identical metal strappings are generally used in the height direction of the battery pack to meet the tightening requirements. However, the cost of the strapping is high, and the metal strapping can easily damage the surface of the battery pack. Utility Model Content

[0004] In view of this, the present invention provides a battery pack that uses two fixing straps of different materials to fasten the battery cells, which not only ensures the tight fixation of the battery pack, but also reduces the fastening cost and reduces the wear of the fixing straps on the surface of the battery cells.

[0005] This utility model also provides a battery pack.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A battery pack, comprising:

[0008] Multiple battery cells stacked along a first direction;

[0009] A first fixing band and a second fixing band are spaced apart along the height direction of the battery cell;

[0010] The first fixing strap is disposed near the top of the battery cell, and the second fixing strap is disposed near the bottom of the battery cell. The first fixing strap is made of rigid material, and the second fixing strap is made of flexible insulating material.

[0011] As can be seen from the above technical solution, the battery pack provided by this utility model uses a first fixing strap made of rigid material and a second fixing strap made of flexible insulating material. The first fixing strap is made of rigid material to ensure the structural reliability of the battery pack formed by stacking multiple battery cells and to ensure the tightness of the battery pack. The second fixing strap is made of flexible insulating material to assist in fixing the battery pack. Compared with metal fixing straps, the second fixing strap is lower in cost, has better insulation effect, and can avoid wear on the surface of the battery cells. The battery pack of this utility model, by using two fixing straps of different materials to fasten the battery cells, not only ensures the tightness and fixation of the battery pack, but also reduces the fastening cost and reduces the wear of the fixing straps on the surface of the battery cells.

[0012] This utility model also provides a battery pack, including a housing and a plurality of battery packs disposed in the housing. The housing includes a bottom plate, and the battery packs are disposed on the bottom plate. The battery packs are the aforementioned battery packs.

[0013] The battery pack of this utility model includes the aforementioned battery pack, and therefore has the advantages of the aforementioned battery pack, which will not be repeated here. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of 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 only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 A schematic diagram of the battery pack from one angle provided in an embodiment of this utility model;

[0016] Figure 2 This is a structural schematic diagram of the battery pack from another angle provided in an embodiment of the present invention;

[0017] Figure 3 This is a partially enlarged structural schematic diagram of the battery pack provided in an embodiment of the present utility model;

[0018] Figure 4 A structural schematic diagram of the protective end plate at one angle provided in an embodiment of this utility model;

[0019] Figure 5 This is a structural schematic diagram of the protective end plate provided in an embodiment of the present utility model from another angle;

[0020] Figure 6 A structural schematic diagram of the protective end plate provided in an embodiment of this utility model from another angle;

[0021] Figure 7 A partially enlarged structural diagram of the battery pack near the protective end plate provided in an embodiment of this utility model;

[0022] Figure 8 A schematic diagram of the connection structure between the protective end plate and the insulating end plate provided in an embodiment of this utility model;

[0023] Figure 9 This is a schematic diagram of the battery pack provided in an embodiment of the present utility model;

[0024] Figure 10 This is a partial structural diagram of the battery pack provided in an embodiment of the present invention.

[0025] in:

[0026] 1. First fixing strap, 2. Second fixing strap, 3. Battery cell, 4. Protective end plate, 401. First limiting structure, 4011. Limiting boss, 4012. Support column surface, 4013. Wedge-shaped limiting block, 402. Second limiting structure, 4021. Limiting groove, 4022. Groove wall, 403. Reinforcing rib plate, 5. Insulating end plate, 6. Insulating partition, 7. Box body, 8. Bottom plate, 9. Limiting baffle. Detailed Implementation

[0027] This utility model discloses a battery pack that uses two fixing straps of different materials to fasten individual battery cells, which not only ensures the tight fixation of the battery pack but also reduces the fastening cost and reduces the wear of the fixing straps on the surface of the individual battery cells.

[0028] This utility model also discloses a battery pack.

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] A battery pack is formed by connecting multiple battery cells with similar capacity and internal resistance in series or in parallel.

[0031] A battery cell can store chemical energy and controllably convert it into electrical energy. In recyclable battery cells, the active materials can be reactivated by charging after discharge, allowing for continued use. A battery cell includes a casing and a battery cell housed within the casing.

[0032] A battery pack comprises a battery array consisting of multiple individual battery cells connected in series and / or parallel, 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 parts. These components are housed within a casing and sealed with a cover, forming a complete functional unit capable of directly outputting electrical energy. As a rechargeable battery, the battery pack is the power source for new energy vehicles.

[0033] See Figures 1 to 10 The battery pack of this utility model includes multiple battery cells 3, a first fixing strap 1, and a second fixing strap 2. The multiple battery cells 3 are stacked along a first direction, and the first fixing strap 1 and the second fixing strap 2 are spaced apart along the height direction of the battery cells 3. The first fixing strap 1 and the second fixing strap 2 bind the stacked battery cells 3 to form the battery pack. The first fixing strap 1 is positioned near the top of the battery cells 3, and the second fixing strap 2 is positioned near the bottom of the battery cells 3. The first fixing strap 1 is made of a rigid material, and the second fixing strap 2 is made of a flexible insulating material. The second fixing strap 2 serves to gather the battery pack, while the first fixing strap 1 secures the battery pack. To avoid damage to the surface of the battery pack and ensure insulation, the second fixing strap 2 is made of a flexible insulating material, which is less expensive than a metal fixing strap. The first fixing strap 1, being a rigid material, has better strength and ensures a secure hold on the battery pack.

[0034] The first fixing strap 1 slides down from the top of the battery pack and fits onto it, preventing the welding at the joint from affecting the battery. The second fixing strap 2 wraps around the outside of the battery pack and secures the joint, facilitating installation. The strength of the first fixing strap 1 is greater than that of the second fixing strap 2. Since the bottom of the battery pack also has a limiting structure for the battery pack after it is placed inside, even if the strength of the second fixing strap 2 is lower, it can still meet the requirements for securing the battery pack. The height direction of the battery cell 3 is as follows... Figure 2 As shown, this is the direction from the bottom surface to the top surface of battery cell 3.

[0035] This utility model's battery pack utilizes a first fixing strap 1 made of rigid material and a second fixing strap 2 made of flexible insulating material. The first fixing strap 1, being rigid, ensures the structural reliability of the battery pack by securing multiple stacked battery cells 3 and guarantees the required tightness of the battery pack. The second fixing strap 2, made of flexible insulating material, further secures the battery pack. Compared to metal fixing straps, the second strap 2 is lower in cost, provides better insulation, and prevents wear on the surface of the battery cells 3. This utility model's battery pack, by using two fixing straps of different materials to fasten the battery cells, ensures secure fastening of the battery pack while reducing fastening costs and minimizing wear on the surface of the battery cells 3.

[0036] The first fixing band 1 has a dimension of H1 mm along the height direction of the battery cell 3, and the second fixing band 2 has a dimension of H2 mm along the height direction of the battery cell 3. The range of H2 / H1 is 0.81-1.24. The value of H2 / H1 can be any value among 0.81, 0.9, 1, 1.1, 1.24, etc., or a value between any two values.

[0037] Specifically, H1mm ranges from 17-21mm, and can be any value from 17mm, 18.5mm, 19mm, 20mm, 21mm, or any value between any two. A value that is too large, while providing better tightening, will result in wasted cost and is not conducive to the first fixing band 1 being fitted onto the battery pack; a value that is too small cannot guarantee a reliable tightening effect. H2mm also ranges from 17-21mm, and can be any value from 17mm, 18mm, 19mm, 20mm, 21mm, or any value between any two. A value that is too large will result in wasted cost; a value that is too small cannot guarantee reliable closure of the grouped battery cells 3.

[0038] In a preferred embodiment, since the strength of the first fixing band 1 is greater than the strength of the second fixing band 2, in order to improve the fastening strength of the second fixing band 2, H2 > H1, thereby achieving the goal of improving the strength of the second fixing band 2 while saving costs. If the value of H2 / H1 is too large, it will cause cost waste; if the value is too small, it will not meet the strength requirements of the second fixing band 2.

[0039] Understandably, the height direction of battery cell 3 is perpendicular to the first direction, such as... Figure 2 As shown. The height of the battery cell 3 is H3mm, and the range of H1 / H3 is 0.08-0.1. The value of H1 / H3 can be any value among 0.08, 0.085, 0.09, 0.095, 0.1, or any value between any two values. By setting the range of H1 / H3 within the above range, it is possible to ensure that the width of the first fixing band 1 along the height direction meets the requirements for tightening the battery pack, and to avoid cost waste caused by the width of the first fixing band 1 being too large. If the value of H1 / H3 is too large, it will cause cost waste and is not conducive to the first fixing band 1 being fitted onto the battery pack; if the value is too small, a reliable tightening effect cannot be guaranteed. The range of H3mm is 203-208mm. Specifically, H3mm can be any value among 203mm, 204mm, 205mm, 207mm, 208mm, or any value between any two values.

[0040] Wherein, the thickness of the first fixing band 1 is T1mm, and the thickness of the second fixing band 2 is T2mm, as follows. Figure 3As shown, the range of T2 / T1 is 0.4-2.6, and the value of T2 / T1 can be any value from 0.4, 0.7, 1.3, 1.6, 2.6, or any value between any two values. Setting the range of T2 / T1 within the above range can improve the strength of the second fixing band 2 while saving costs. If the value of T2 / T1 is too large, it will result in wasted costs; if the value is too small, it will not meet the strength requirements of the second fixing band 2. Specifically, the range of T1mm is 0.5-1.5mm, and it can be any value from 0.5mm, 0.8mm, 1mm, 1.25mm, 1.5mm, or any value between any two values. The range of T2mm is 0.6-1.3mm, and it can be any value from 0.6mm, 0.8mm, 1mm, 1.1mm, 1.3mm, or any value between any two values.

[0041] Preferably, since the strength of the second fixing band 2 is weaker than that of the first fixing band 1, in order to improve the strength of the second fixing band 2, the specific value of T2mm can be greater than the specific value of T1mm when selecting parameters.

[0042] In one specific embodiment, the first fixing band 1 is made of metal to give it high strength. The second fixing band 2 is made of plastic, which has lower hardness, reducing damage to the battery pack surface and facilitating direct wrapping and heat sealing around the battery pack without needing to be fitted from the top, making installation easier. The first fixing band 1 is preferably made of steel. In this embodiment, the dimensions of the first fixing band 1 along the height of the battery pack and the second fixing band 2 along the height of the battery pack may be the same or different, depending on actual needs. To achieve consistent strength between the first fixing band 1 and the second fixing band 2, when their thicknesses are the same, the second fixing band 2, due to its lower material strength, needs to have a larger dimension along the height of the battery pack than the first fixing band 1.

[0043] To ensure the battery pack is securely fastened and that the fastening surfaces are evenly stressed, the first fixing strap 1 and the second fixing strap 2 are spaced H4mm apart along the height of the battery pack. Figure 2 As shown, H4mm ranges from 106.5 to 116.5mm. Specifically, H4mm can be any value from 106.5mm, 108mm, 110mm, 113.5mm, 116.5mm, or any value between two of these. Setting the interval between the first fixing band 1 and the second fixing band 2 within this range ensures reliable gathering and securing of multiple stacked battery cells 3. If the value of H4 is too small, the gathering effect at the top or bottom of the battery pack cannot be guaranteed; if the value is too large, the securing effect in the middle of the battery pack is poor.

[0044] To facilitate the installation of the second fixing strap 2 onto the battery pack while ensuring the battery pack's folding effect, the distance between the second fixing strap 2 and the bottom of the battery pack is H5mm, with H5mm ranging from 26-36mm. Setting H5 within this range not only prevents interference between the second fixing strap 2 and the structure on the support base plate when installed on the battery pack but also ensures the battery pack's folding effect. Specifically, H5mm can be any value from 26mm, 28mm, 30.5mm, 33mm, 36mm, etc., or a value between any two of these values.

[0045] To prevent damage to the battery surface when the first fixing strap 1 and the second fixing strap 2 tighten the battery cell 3, the battery pack of this utility model also includes a protective end plate 4, such as... Figure 1 and Figure 2 As shown, protective end plates 4 are disposed at both ends of the battery pack in the first direction. To limit the first fixing strap 1 and the second fixing strap 2 and prevent them from slipping off the battery pack, a first limiting structure 401 is provided on the protective end plate 4 at the position where the first fixing strap 1 is wrapped, and a second limiting structure 402 is provided on the protective end plate 4 at the position where the second fixing strap 2 is wrapped. The first limiting structure 401 is used to limit the first fixing strap 1 to prevent it from falling off, and the second limiting structure 402 is used to limit the second fixing strap 2 to prevent it from displacing along the height direction.

[0046] The first limiting structure 401 and / or the second limiting structure 402 include a limiting boss or a limiting groove.

[0047] In one specific embodiment, such as Figures 4-6 As shown, the first limiting structure 401 includes a limiting boss 4011 and a supporting column surface 4012. The limiting surface of the limiting boss 4011 is set perpendicular to the height direction of the battery pack. The supporting column surface 4012 is set on the side of the limiting boss 4011 near the top of the battery pack. The limiting boss 4011 protrudes from the supporting column surface 4012. The maximum distance between the surface of the limiting boss 4011 and the surface of the supporting column surface 4012 is L1mm. The thickness of the first fixing band 1 is T1mm, where Lmm > T1mm, to ensure that the limiting boss 4011 limits the first fixing band 1 on the side near the bottom of the battery cell 3. The specific values ​​of Lmm and T1mm are not limited and can be selected by those skilled in the art according to actual needs. To prevent the first fixing band 1 fitted on the supporting column surface 4012 from accidentally detaching from the top of the battery pack, a wedge-shaped limiting block 4013 is provided on the supporting column surface 4012 near the top of the battery pack. Figure 4 and Figure 6As shown, the lowest end of the wedge-shaped limiting block 4013 is positioned near the top of the battery pack, which facilitates the first fixing band 1 to be fitted onto the support column surface 4012 from the top; the highest end of the wedge-shaped limiting block 4013 is positioned near the bottom of the battery pack, and the first fixing band 1 is fitted onto the support column surface 4012 between the wedge-shaped limiting block 4013 and the limiting boss 4011, which facilitates the formation of double limiting at the top and bottom of the first fixing band 1.

[0048] Due to the obstruction of the limiting boss 4011, it is difficult for the second fixing strap 2 to be inserted from the top of the battery pack. Therefore, the second fixing strap 2 needs to be wrapped around the battery pack before sealing and fixing. Thus, the second limiting structure 402 can be set as a limiting groove 4021. The limiting groove 4021 extends along the wrapping direction of the second fixing strap 2, and the groove width of the limiting groove 4021 is set along the height direction of the battery cell 3. The groove width of the limiting groove 4021 is H6mm. Figure 6 As shown, the second fixing band 2 has a dimension of H2mm along the height direction of the battery cell 3, where H6mm > H2mm, so that the second fixing band 2 can be placed within the limiting groove 4021. The limiting groove 4021 includes groove walls 4022 respectively disposed on both sides of the groove body. The maximum distance between the top surface of the groove wall 4022 and the bottom of the groove is L2mm. The thickness of the second fixing band 2 is T2mm, where L2 > T2, so as to limit the second fixing band 2. The height direction of the battery cell 3 is the same as the height direction of the battery pack. The range of H6mm is 21-25mm. Specifically, H6mm can be any value among 21mm, 22mm, 23mm, 24mm, 25mm, etc., or a value between any two values.

[0049] To ensure the proper position of the second fixing strap 2 during use and to facilitate its winding within the limiting groove 4021, the difference between H6 and H2 is limited to 0-4mm. If the value of H6-H2 is too large, the second fixing strap 2 will have significant displacement space along the height of the battery pack within the limiting groove 4021, making it prone to shifting under external force and affecting the secure fastening of the battery pack. If the value of H6-H2 is too small, the second fixing strap 2 will be difficult to wind within the limiting groove 4021, resulting in low installation efficiency. The value of H6-H2 can be any value from 0mm, 1mm, 2mm, 3.5mm, 4mm, or any value between any two.

[0050] To improve the structural strength of the protective end plate 4, multiple intersecting reinforcing ribs 403 are provided on the surface of the protective end plate 4 away from the battery cell 3, such as... Figure 4 As shown.

[0051] To improve the insulation performance of the battery pack, an insulating end plate 5 is also provided between the protective end plate 4 and the battery cell 3, such as... Figure 7 and Figure 8As shown. To improve overall integrity, one end face of the insulating end plate 5 is fixedly connected to the protective end plate 4, and the other end face is fixedly connected to the battery cell 3.

[0052] Specifically, in order to improve the convenience and reliability of the connection, the insulating end plate 5, the protective end plate 4, and the battery cell 3 are all bonded with adhesive layers.

[0053] To improve the insulation performance between adjacent battery cells 3, an insulating partition 6 is provided between adjacent battery cells 3, such as... Figure 7 As shown, the insulating separator 6 is bonded to the adjacent battery cell 3. In order to ensure that the insulating separator 6 has both good insulation and heat insulation properties, the insulating separator 6 is made of mica sheet, which gives the insulating separator 6 good heat insulation performance and prevents the safety of other battery cells 3 from being affected when one battery cell 3 experiences thermal runaway.

[0054] This utility model also provides a battery pack, such as Figure 9 and Figure 10 As shown, it includes a housing 7 and several battery packs disposed within the housing 7. The housing 7 includes a base plate 8, on which the battery packs are disposed. The battery packs are the aforementioned battery packs. Figure 9 The housing 7 can hold 8 battery packs.

[0055] To limit the bottom of the battery pack placed on the base plate 8, a limiting baffle 9 is provided on the base plate 8 to limit the bottom end of the battery pack. The limiting baffle 9 protrudes from the surface of the base plate 8 where the battery pack is placed, thereby blocking and restraining the battery pack. Specifically, the limiting baffle 9 can be an L-shaped plate, which is fixedly connected to the base plate 8.

[0056] The battery pack is fitted with a first fixing strap 1 and a second fixing strap 2 along its height. The second fixing strap 2 is positioned near the base plate 8, and its height is higher than that of the limiting baffle 9, thus facilitating its securing to the battery pack. The limiting baffle 9 and the second fixing strap 2 simultaneously constrain and limit the bottom of the battery pack, ensuring its positional reliability.

[0057] In the description of this solution, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this solution, "multiple" means two or more, unless otherwise explicitly specified.

[0058] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0059] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery pack, characterized in that, include: Multiple battery cells stacked along a first direction; A first fixing band and a second fixing band are spaced apart along the height direction of the battery cell; The first fixing strap is disposed near the top of the battery cell, and the second fixing strap is disposed near the bottom of the battery cell. The first fixing strap is made of rigid material, and the second fixing strap is made of flexible insulating material.

2. The battery pack according to claim 1, characterized in that, The first fixing band has a dimension of H1 mm along the height direction of the battery cell, and the second fixing band has a dimension of H2 mm along the height direction of the battery cell. The range of H2 / H1 is 0.81-1.

24.

3. The battery pack according to claim 2, characterized in that, The height of the battery cell is perpendicular to the first direction, and the height of the battery cell is H3mm, with H1 / H3 ranging from 0.08 to 0.

1.

4. The battery pack according to claim 2, characterized in that, The range of H3mm is 203-208mm.

5. The battery pack according to claim 2, characterized in that, The range of H1mm is 17-21mm; And / or, H2mm ranges from 17 to 21 mm.

6. The battery pack according to claim 1, characterized in that, The thickness of the first fixing band is T1 mm, the thickness of the second fixing band is T2 mm, and the range of T2 / T1 is 0.4-2.

6.

7. The battery pack according to claim 6, characterized in that, The range of T1mm is 0.5-1.5mm; And / or, T2mm ranges from 0.6 to 1.3 mm.

8. The battery pack according to claim 7, characterized in that, The first fixing strap is made of metal, and the second fixing strap is made of plastic.

9. The battery pack according to claim 8, characterized in that, The first fixing belt is a steel belt.

10. The battery pack according to claim 8, characterized in that, The dimension of the first fixing strap along the height direction of the battery pack is the same as or different from the dimension of the second fixing strap along the height direction of the battery pack.

11. The battery pack according to claim 1, characterized in that, The distance between the first fixing strap and the second fixing strap along the height direction of the battery pack is H4mm, and the range of H4mm is 106.5-116.5mm.

12. The battery pack according to any one of claims 1 or 11, characterized in that, The distance between the second fixing strap and the bottom of the battery pack is H5mm, and H5mm ranges from 26-36mm.

13. The battery pack according to claim 1, characterized in that, It also includes protective end plates, which are disposed at both ends of the battery pack in a first direction. A first limiting structure is provided on the protective end plates at the position where the first fixing band is wrapped, and a second limiting structure is provided on the protective end plates at the position where the second fixing band is wrapped.

14. The battery pack according to claim 13, characterized in that, The first limiting structure and / or the second limiting structure include a limiting boss or a limiting groove.

15. The battery pack according to any one of claims 13 or 14, characterized in that, The first limiting structure includes a limiting boss and a supporting column. The limiting boss is arranged perpendicular to the height direction of the battery pack. The supporting column is arranged on the side of the limiting boss near the top of the battery pack. The limiting boss protrudes from the supporting column. The maximum distance between the surface of the limiting boss protruding from the supporting column is L1mm. The thickness of the first fixing strap is T1mm, where L1mm>T1mm.

16. The battery pack according to any one of claims 13 or 14, characterized in that, The second limiting structure is a limiting groove, which extends along the winding direction of the second fixing band. The groove width of the limiting groove is set along the height direction of the battery cell. The groove width of the limiting groove is H6mm, and the dimension of the second fixing band along the height direction of the battery cell is H2mm, where H6mm>H2mm.

17. The battery pack according to claim 16, characterized in that, The numerical range of H6-H2 is 0-4 mm.

18. The battery pack according to claim 16, characterized in that, The range of H6mm is 21-25mm.

19. The battery pack according to claim 13, characterized in that, An insulating end plate is provided between the protective end plate and the battery cell. One end face of the insulating end plate is fixedly connected to the protective end plate, and the other end face is fixedly connected to the battery cell.

20. The battery pack according to claim 19, characterized in that, The insulating end plate, the protective end plate, and the battery cell are all bonded together with an adhesive layer.

21. The battery pack according to claim 1, characterized in that, An insulating partition is provided between adjacent battery cells, and the insulating partition is bonded to the adjacent battery cells.

22. The battery pack according to claim 21, characterized in that, The insulating partition is a mica sheet.

23. A battery pack, comprising a housing and a plurality of battery packs disposed within the housing, the housing including a base plate on which the battery packs are disposed, characterized in that, The battery pack is the battery pack according to any one of claims 1-22.

24. The battery pack according to claim 23, characterized in that, The base plate is provided with a limiting baffle for limiting the bottom end of the battery pack, and the limiting baffle protrudes from the base plate.

25. The battery pack according to claim 24, characterized in that, The battery pack is fitted with a first fixing strap and a second fixing strap along the height direction. The second fixing strap is located near the base plate of the battery pack, and the height of the second fixing strap is higher than the height of the limiting baffle.

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