Battery pack and electric device

Abstract

The utility model relates to the technical field of battery packs, in particular to a battery pack and an electric device. The battery pack comprises a shell, a battery module and a heat-conducting sheet, the at least two battery modules are fixedly mounted in the shell, and the battery modules are stacked at least along a first direction; the heat-conducting fins are clamped between any pair of adjacent stacked battery modules, and the heat-conducting fins are in contact with the shell so as to conduct heat to the shell. According to the battery pack structure, the heat dissipation between the battery modules in the battery pack is realized through the heat-conducting fins clamped between the battery modules, so that the space of the battery pack is saved, the self weight and the volume of the battery pack are reduced, the processing cost of the battery pack is reduced, and the convenience of use of the battery pack is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery pack technical field, especially a kind of battery pack and electric device. BACKGROUND

[0002] With the improvement of the output power of battery pack, the heat generation of battery module in battery pack is also more and more big.For battery pack containing multiple battery modules, it is particularly important to improve the heat dissipation performance between battery modules.At present, a common practice in the industry is to fill glue in the battery pack to form a glue filling structure between the modules to achieve heat dissipation.However, on the one hand, this will result in a large self-weight of the battery pack, which is not conducive to use;On the other hand, it will also lead to high cost of battery pack. SUMMARY

[0003] The utility model embodiment proposes a kind of battery pack and electric device to overcome the above problems.

[0004] The battery pack described in the utility model embodiment comprises a shell, a battery module and a heat-conducting sheet.

[0005] The battery module is fixedly installed in the shell and is provided with at least two, and the battery module is stacked at least along a first direction.

[0006] The heat-conducting sheet is clamped between any pair of adjacent battery modules, and the heat-conducting sheet is in contact with the shell to conduct heat to the shell.

[0007] Optionally, the heat-conducting sheet comprises a main body and a contact portion.

[0008] The main body is a flat sheet, and the main body is clamped between two adjacent battery modules.

[0009] The contact portion is a flat sheet extending from the edge of the main body, and the contact portion is in close contact with the shell.

[0010] Optionally, the heat-conducting sheet is a metal sheet.

[0011] Optionally, the battery pack further comprises an insulating heat-conducting pad.

[0012] The insulating heat-conducting pad is clamped between any pair of adjacent battery modules, and the positive and negative poles of the battery core of the battery module are arranged along the first direction, and the insulating heat-conducting pad is blocked between the corresponding battery cores of adjacent battery modules to achieve insulation protection between adjacent battery modules.

[0013] Optionally, the insulating heat-conducting pad is provided with at least two and is arranged on the same arrangement plane, and the arrangement plane is clamped between the heat-conducting sheet and the battery module.

[0014] Optionally, the insulating heat-conducting pad is arranged on at least two sides of the heat-conducting sheet.

[0015] Optionally, a receiving groove for receiving the insulating heat-conducting pad is arranged on the side of the battery module facing the heat-conducting sheet, and / or on the side of the heat-conducting sheet facing the battery module.

[0016] Optionally, the battery pack further comprises an insulating pad arranged at the head end and the tail end of the stacked battery modules.

[0017] Optionally, a window for avoiding the line of the battery module is arranged on the contact portion.

[0018] Optionally, the contact portion is arranged with at least two intervals along the edge of the main body portion.

[0019] The utility model embodiment further provides a kind of electric device, and electric device includes any one of the battery pack described above.

[0020] Compared with prior art, the utility model has the following advantages:

[0021] The battery pack described in the utility model includes shell, stacked battery module and heat-conducting sheet, wherein the heat-conducting sheet is clamped between any pair of adjacent battery modules, can absorb the heat of adjacent battery modules and transfer heat to the shell, so as to dissipate heat to the outside of battery pack through the shell.

[0022] The above battery pack structure realizes heat dissipation between battery modules in battery pack through heat-conducting sheet clamped between battery modules, which is beneficial to save battery pack space, thus beneficial to reduce the self weight and volume of battery pack, and also reduces the processing cost of battery pack and improves the usability of battery pack. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will be briefly introduced the drawings needed to be used in the description of the embodiments of the utility model, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0024] Figure 1 is the isometric view of the battery pack (without shell) described in the embodiments of the utility model;

[0025] Figure 2 is the exploded view of Figure 1 ;

[0026] Figure 3 isFigure 2 Axonometric view of the heat-conducting sheet;

[0027] Reference numerals: 1, battery module; 11, accommodating groove; 12, connecting hole; 2, heat-conducting sheet; 21, main body part; 22, contact part; 221, avoiding window; 3, insulating heat-conducting pad; 4, insulating gasket; 5, pull rod; 6, threaded fastener. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned purposes, features and advantages of the present application more apparent, comprehensible and easily understood, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0029] The battery pack according to the present application is suitable for high-rate discharge scenarios, and is particularly suitable for application scenarios such as electric motorcycles, electric bicycles, energy storage batteries, consumer electronic products, etc.

[0030] The structure of the battery pack according to the present embodiment can refer to Figure 1 and Figure 2 The battery pack according to the present application is suitable for high-rate discharge scenarios, and is particularly suitable for application scenarios such as electric motorcycles, electric bicycles, energy storage batteries, consumer electronic products, etc. Figure 2 The battery pack according to the present application is suitable for high-rate discharge scenarios, and is particularly suitable for application scenarios such as electric motorcycles, electric bicycles, energy storage batteries, consumer electronic products, etc. Figure 2For example, the battery module 1 shown in the figure is in a cuboid shape. In the embodiment, the first direction can be the length direction of the battery module 1, the height direction of the battery module 1, or the thickness direction of the battery module 1; the second direction is any direction other than the first direction, and the third direction is any direction other than the first direction and the second direction. For example, when the first direction is the thickness direction of the battery module 1, the second direction can be the length direction of the battery module 1, and the third direction can be the height direction of the battery module 1. It should be noted that the battery module 1 adopts the existing battery module structure, that is, it includes a support and a plurality of battery cells fixed on the support, and the geometric shape of the battery module 1 is not limited to a cuboid. On this basis, the stacking direction of the battery module 1 can also have other direction references. For example, when the battery module 1 is in a pie shape, the battery module 1 can also be stacked along the axial direction of the battery module 1 itself or stacked along the radial direction of the battery module 1 itself. That is, the first direction can also be the axial direction or the radial direction of the battery module 1. The specific geometric shape and stacking direction of the battery module 1 depend on the actual needs and are not listed here.

[0031] For example, the battery module 1 shown in the figure is in a cuboid shape. In the embodiment, the first direction can be the length direction of the battery module 1, the height direction of the battery module 1, or the thickness direction of the battery module 1; the second direction is any direction other than the first direction, and the third direction is any direction other than the first direction and the second direction. For example, when the first direction is the thickness direction of the battery module 1, the second direction can be the length direction of the battery module 1, and the third direction can be the height direction of the battery module 1. It should be noted that the battery module 1 adopts the existing battery module structure, that is, it includes a support and a plurality of battery cells fixed on the support, and the geometric shape of the battery module 1 is not limited to a cuboid. On this basis, the stacking direction of the battery module 1 can also have other direction references. For example, when the battery module 1 is in a pie shape, the battery module 1 can also be stacked along the axial direction of the battery module 1 itself or stacked along the radial direction of the battery module 1 itself. That is, the first direction can also be the axial direction or the radial direction of the battery module 1. The specific geometric shape and stacking direction of the battery module 1 depend on the actual needs and are not listed here. Figure 2 As shown in the figure, in the stacking direction of the battery module 1, a heat-conducting sheet 2 is arranged between any pair of adjacent battery modules 1. The heat-conducting sheet 2 is in contact with the battery module 1 for heat conduction and is also in contact with the shell, so that the heat of the battery module 1 can be transmitted to the shell through the heat-conducting sheet 2 and finally dissipated to the external environment from the shell.

[0032] The existing battery pack generally pays more attention to the heat dissipation between battery cells and easily ignores the heat dissipation between battery modules 1. The heat dissipation between battery cells generally only needs to consider the conduction of the heat of the battery cells to the outside of the battery module 1; however, for the battery module 1, the position of the battery module 1 in the battery pack is also an important factor affecting heat dissipation. Generally, among the stacked battery modules 1, the battery module 1 located at the outer end is closer to the shell and thus has better heat dissipation conditions. The battery module 1 located at the inner end is farther away from the shell and thus has poor heat dissipation conditions. The battery pack described in the embodiment of the utility model avoids the difference in heat dissipation of the battery module 1 due to the different positions of the battery module 1 in the battery pack by arranging the heat-conducting sheet 2 between each pair of adjacent battery modules 1, so that each battery module 1 has good heat dissipation conditions and heat dissipation capacity. At the same time, the heat-conducting sheet 2 can be in contact with the shell in any direction, which is beneficial to increasing the heat conduction path of the heat-conducting sheet 2 to the shell as much as possible and thus improving the heat dissipation efficiency of the heat dissipation between the battery modules 1. Since the heat dissipation sheet has a simple and light structure and saves space, compared with the existing battery pack, the volume, weight, and processing cost of the battery pack adopting the above structure are relatively low.

[0033] Based on the above battery pack structure, the battery pack shown in the figure can be used as a reference. Figure 3As shown, the heat-conducting sheet 2 can specifically include a main body part 21 clamped between the battery modules 1 and a contact part 22 extending from the edge of the main body part 21. Both the main body part 21 and the contact part 22 are flat sheet bodies, so as to reduce the overall space occupation of the heat-conducting sheet 2 when clamped between the stacked battery modules 1. The side of the contact part 22 facing the inner wall of the shell is attached to the inner wall of the shell, so as to realize the contact heat conduction between the heat-conducting sheet 2 and the shell. Since the contact part 22 is attached to the shell, the heat-conducting sheet 2 can ensure that the heat-conducting sheet 2 and the shell have sufficient contact area by the contact part 22, thereby improving the heat conduction effect between the heat-conducting sheet 2 and the shell. Of course, in other embodiments, the heat-conducting sheet 2 can also realize the heat conduction between the heat-conducting sheet 2 and the shell by directly abutting the edge of the main body part 21 on the inner wall of the shell.

[0034] The foregoing heat-conducting sheet 2 is preferably made of a metal sheet. Part of the metal sheet serves as the main body part 21 clamped between the battery modules 1, and the contact part 22 can be a bent edge bent from the side of the main body part 21 or a welded part welded on the main body part 21. Since the heat conductivity of the metal sheet is generally high, using the metal sheet as the heat-conducting sheet 2 can improve the heat dissipation efficiency of the heat dissipation between the battery modules 1. In the present embodiment, the metal sheet is preferably made of an aluminum sheet. Compared with other metal sheets, the aluminum sheet is easier to shape, and thus has a lower cost. At the same time, the aluminum sheet is lighter, which can further reduce the self-weight of the battery pack. Of course, the metal sheet can also be specifically made of a sheet body made of other metal materials such as an iron sheet or a copper sheet, which will not be enumerated and described here. Of course, the heat-conducting sheet 2 can also be made of a non-metal sheet such as a heat-conducting rubber pad. At this time, part of the heat-conducting rubber pad is clamped between the battery modules 1, and the part extending out of the battery modules 1 serves as the contact part 22 attached to the shell.

[0035] In the embodiment, the positive and negative directions of the battery cells in the battery module 1 are also arranged along the first direction. That is, the positive poles of the battery cells in the battery module 1 face the battery module 1 adjacent to the battery module 1 along the first direction, and the negative poles of the battery cells face another battery module 1 adjacent to the battery module 1 along the first direction. An insulating and heat-conducting pad 3 is arranged between any pair of adjacent battery modules 1. The insulating and heat-conducting pad 3 is arranged between the corresponding battery cells of the adjacent battery modules 1 along the first direction to achieve insulation between the adjacent battery modules 1. As described in the embodiment, the battery module 1 is in a cubic shape, the first direction is the thickness direction of the battery module 1, and the positive and negative poles of the battery cells in the battery module 1 are arranged along the thickness direction of the battery module 1 as described above. An insulating and heat-conducting pad 3 is arranged between any pair of adjacent battery modules 1, and the insulating and heat-conducting pad 3 is arranged between the corresponding battery cells of the adjacent battery modules 1 along the first direction and extends to cover the battery cells in the adjacent battery modules 1 to achieve insulation between the battery modules 1. When the battery modules 1 are stacked along the second direction or the third direction, the insulation between the battery modules 1 can be achieved by the insulation structure of the battery modules 1 themselves. In the embodiment, the second direction can be the length direction of the battery module 1, and the third direction can be the height direction of the battery module 1. It should be noted that the above description of the positive and negative poles of the battery cells in the battery module 1 arranged along the thickness direction of the battery module 1 is only a specific example for ease of description, and the positive and negative poles of the battery cells in the battery module 1 can also be arranged along the length direction or the height direction of the battery module 1. The insulating and heat-conducting pad 3 preferably uses a heat-conducting silica gel sheet to prevent the insulating and heat-conducting pad 3 from affecting the heat dissipation between the battery modules 1. In order to ensure good fitting with the battery module 1, the insulating and heat-conducting pad 3 can be provided with some avoiding hollows on the outer surface of the battery module 1 without affecting the insulation effect.

[0036] In the embodiment, the battery module 1 can be arranged along the first direction, the second direction, or the third direction. Figure 2As shown, the insulating and heat-conducting pads 3 can be provided with at least two and arranged in the same arrangement plane to form a layer of insulating and heat-conducting layer by the at least two insulating and heat-conducting pads 3, thereby achieving insulation protection between adjacent battery modules 1. Since the insulating and heat-conducting layer is composed of a plurality of insulating and heat-conducting pads 3 arranged in the same layer, each insulating and heat-conducting pad 3 can maintain good adhesion with the battery module 1. Compared with the way of forming a complete insulating and heat-conducting layer by using a single insulating and heat-conducting pad 3, such a setting can ensure that the insulating and heat-conducting pad 3 can be as close as possible to the battery module 1 to prevent gaps between the insulating and heat-conducting pad 3 and the battery module 1 that affect heat conduction. Of course, there can be only a single insulating and heat-conducting pad 3 between the battery modules 1 to form a complete insulating and heat-conducting layer; or at least two insulating and heat-conducting pads 3 can be stacked together to form at least two layers of insulating and heat-conducting layer to ensure good insulation protection effect between adjacent battery modules 1. In this embodiment, the number of insulating and heat-conducting pads 3 in the single-layer insulating and heat-conducting layer can be two, three or even more. When the insulating and heat-conducting pad 3 is provided with two pieces, the two pieces of insulating and heat-conducting pad 3 can be arranged in the same arrangement plane to form a layer of insulating and heat-conducting layer, or the two pieces of insulating and heat-conducting pad 3 can be stacked in two arrangement planes to form two layers of insulating and heat-conducting layer. When a single insulating and heat-conducting pad 3 is used between the battery module 1 and the heat-conducting sheet 2 to form a layer of insulating and heat-conducting layer, the insulating and heat-conducting pad 3 needs to extend to cover all the battery cells in the battery module 1. Or, the projection of all the battery cells on the battery module 1 in the arrangement plane of the insulating and heat-conducting pad 3 does not exceed the coverage range of all the insulating and heat-conducting pads 3. When at least two insulating and heat-conducting pads 3 are used between the battery module 1 and the heat-conducting sheet 2 to form a layer of insulating and heat-conducting layer, each insulating and heat-conducting pad 3 needs to cover the battery cells in the corresponding battery module 1, and all the insulating and heat-conducting pads 3 can cover all the battery cells in the battery module 1. The coverage range of the insulating and heat-conducting pad 3 when there are multiple layers of insulating and heat-conducting layer between the battery module 1 and the heat-conducting sheet 2 can refer to the foregoing setting, which will not be described here.

[0037] In addition, reference can be made to Figure 2As shown, the insulating heat-conducting pads 3 can be respectively arranged on both sides of the heat-conducting sheet 2 to ensure that the heat-conducting sheet 2 and the battery module 1 on both sides have the same heat dissipation effect. When the heat-conducting sheet 2 is made of metal sheet, there will be a potential difference between the battery module 1 and the heat-conducting sheet 2. By arranging the insulating heat-conducting pads 3 on both sides of the heat-conducting sheet 2, the battery module 1 can be prevented from being broken by the current generated by the potential difference. In the embodiment, the number and arrangement of the insulating heat-conducting pads 3 on both sides of the heat-conducting sheet 2 can be set according to actual needs, such as arranging a single layer of insulating heat-conducting layer composed of one insulating heat-conducting pad 3 on any side of the heat-conducting sheet 2; or a single layer of insulating heat-conducting layer composed of at least two insulating heat-conducting pads; or a plurality of layers of insulating heat-conducting layer composed of at least two insulating heat-conducting pads 3; or a plurality of layers of insulating heat-conducting layer composed of at least two insulating heat-conducting pads 3 and each insulating heat-conducting layer has at least two insulating heat-conducting pads 3.

[0038] Reference can be made to Figure 2As shown, the side of the battery module 1 facing the heat conducting sheet 2 or the side of the heat conducting sheet 2 facing the battery module 1 can be provided with a receiving groove 11 for receiving the insulating heat conducting pad 3, or both the battery module 1 and the heat conducting sheet 2 are provided with the receiving groove 11. The side of the battery module 1 facing the heat conducting sheet 2, i.e. the side of the bracket of the battery module 1 facing the heat conducting sheet 2, is generally rough on the outer surface, which is not conducive to the close contact between the insulating heat conducting pad 3 and the battery module 1. The receiving groove 11 can provide a relatively flat contact surface to ensure that the insulating heat conducting pad 3 can be closely attached to the battery module 1. In addition, on the one hand, this can reduce the volume of the battery pack in the stacking direction of the battery module 1, and on the other hand, it shortens the heat conduction path from the battery module 1 to the heat conducting sheet 2, thereby improving the heat dissipation efficiency of the battery pack. In addition, the provision of the receiving groove 11 is also conducive to fixing the insulating heat conducting pad 3 and preventing the insulating heat conducting pad 3 from moving during assembly or after assembly. The depth and groove type of the receiving groove 11 depend on the shape and size of the corresponding insulating heat conducting pad 3; the position of the receiving groove 11 depends on the position of the battery cell in the battery module 1. For example, when a single insulating heat conducting pad 3 is used between the battery module 1 and the heat conducting sheet 2 to form an insulating heat conducting layer, the position and shape of the receiving groove 11 need to cover all the battery cells in the battery module 1. In other words, the projection of all the battery cells on the battery module 1 in the plane where the groove bottom of the receiving groove 11 is located does not exceed the shape range of the groove bottom of the receiving groove 11 in the plane. When at least two insulating heat conducting pads 3 are used between the battery module 1 and the heat conducting sheet 2 to form an insulating heat conducting layer, the receiving groove 11 is correspondingly provided with multiple receiving grooves, and the position and shape of all the receiving grooves 11 need to cover the battery cells in the battery module 1 corresponding to the receiving grooves 11, and all the receiving grooves 11 can cover all the battery cells in the battery module 1 after being combined. When there are multiple insulating heat conducting layers between the battery module 1 and the heat conducting sheet 2, the depth of the receiving groove 11 needs to be adapted to the arrangement of the stacked insulating heat conducting pads 3, and the shape and position of the receiving groove 11 can refer to the foregoing arrangement, which will not be described here.

[0039] In addition, the shell of the existing battery pack is generally made of metal material. When the positive and negative electrodes of the battery cells in the battery module 1 are arranged in the first direction, an insulating gasket 4 needs to be provided in the battery pack. The insulating gasket 4 is arranged at the head end and the tail end of the stacked battery module 1 to prevent the battery module 1 from being broken due to the potential difference between the battery module 1 and the shell. The shape and position of the insulating gasket 4 need to extend to cover all the battery cells in the battery module 1 adjacent to the insulating gasket 4. That is, the projection of all the battery cells in the battery module 1 in the first direction does not exceed the coverage range of the insulating gasket 4. It should be noted that when the positive and negative electrodes of the battery cells in the battery module 1 are not arranged in the first direction but in other directions, the insulating gasket 4 can be arranged between the battery module 1 and the shell adjacent to the shell and corresponding to the arrangement direction of the positive and negative electrodes of the battery cells.

[0040] In addition, reference can be made to Figure 3 As shown in the figure, the aforementioned contact portion 22 can be provided with an avoiding window 221 to avoid the wiring of the battery module 1. When the space between the battery module 1 and the shell is limited, the contact portion 22 can also be provided with at least two along the edge of the main body portion 21 where the contact portion 22 is located, that is, the edge of the main body portion 21 has two, three or even more non-connected contact portions 22. In this way, the contact portion 22 can be flexibly arranged to adapt to the space between the battery module 1 and the shell, so that the shell does not have to be deliberately increased in size to leave space for the installation of the contact portion 22 when designed, thereby facilitating the reduction of the size of the battery pack.

[0041] In addition, reference can be made to Figure 2 As shown in the figure, the battery pack can also include a pull rod 5 and a threaded fastener 6. One end of the pull rod 5 is provided with a stopper, and the other end is provided with a threaded hole. The battery module 1 is provided with a connecting hole 12 through which the pull rod 5 passes; the connecting hole 12 is arranged in the stacking direction of the battery module 1. During installation, the pull rod 5 passes through the connecting holes 12 of all the battery modules 1 in the same stacking direction, and the threaded fastener 6 is screwed onto the threaded hole to fix all the battery modules 1 in the same stacking direction into a whole. In this way, the battery module 1 and the heat-conducting sheet 2, the insulating heat-conducting pad 3 and other structures can be fixed externally and then integrated into the shell, thereby greatly facilitating the assembly of the battery pack. At the same time, since the battery modules 1 are fixed into a whole by the pull rod 5 and the threaded fastener 6, the strength of the entire battery pack is also effectively improved. In addition, the battery module 1 and the heat-conducting sheet 2, the insulating heat-conducting pad 3 and other structures can also be tightly attached to each other and relatively fixed by the constraint of the shell. Alternatively, a rivet hole can also be provided at the other end of the aforementioned pull rod 5, and the aforementioned battery module 1 and the heat-conducting sheet 2, the insulating heat-conducting pad 3 and other structures can be fixed into a whole by the pull rod 5 and the rivet.

[0042] For ease of understanding, the battery pack described in the present embodiment will be illustrated by way of example in the following. It should be emphasized that this does not mean that the battery module 1 in the present embodiment is limited to the following examples.

[0043] A battery pack, the structure of which can refer to Figure 2 As shown in the figure, it includes a shell (not shown in the figure) made of metal material and battery modules 1A and 1B. The battery modules 1A and 1B are basically identical in structure and are in the shape of a cube. The positive and negative poles of all the battery cells in the battery modules 1A and 1B are arranged in the thickness direction of the battery modules 1A and 1B. That is, the aforementioned first direction is the thickness direction of the battery modules 1A and 1B. The battery modules 1A and 1B are stacked in the thickness direction of themselves, and the heat-conducting sheet 2 and the insulating heat-conducting pad 3 are arranged between the battery modules 1A and 1B.

[0044] The upper part of the battery pack is provided with a control unit for controlling the battery pack. Therefore, the heat conduction sheet 2 has a main body part 21 sandwiched between the battery modules 1A and 1B, and the side and lower part of the main body part 21 is provided with a contact part 22. In this way, the heat conduction sheet 2 can be in contact with the shell in three directions, i.e. two sides and the lower part, to increase the heat conduction path of the heat conduction sheet 2 to the shell as much as possible, thereby improving the heat dissipation efficiency of the heat dissipation between the battery modules 1. Of course, for some special battery packs, such as the control unit of the battery pack is arranged on the lower side of the battery pack, the contact part 22 of the heat conduction sheet 2 can be arranged on the upper and two sides of the main body part 21. When the control unit of the battery pack is arranged on the side of the battery pack corresponding to the thickness direction of the battery modules 1A and 1B, the upper, lower and two sides of the heat conduction sheet 2 can be provided with the contact part 22. The heat conduction sheet 2 is made of aluminum sheet, and the contact part 22 is integrally formed on the edge of the main body part 21 by bending process. In order to facilitate wiring, the contact part 22 located below the battery modules 1A and 1B is provided with an avoiding window 221. The size and position of the avoiding window 221 are set according to the actual wiring needs. In order to save space, the contact part 22 located on the side of the battery modules 1A and 1B is in a segmented structure, i.e. composed of multiple unconnected parts, so that the contact part 22 at this position can be flexibly arranged to adapt to the space between the battery modules 1A, 1B and the shell.

[0045] The insulating heat conduction pad 3 is specifically provided with two groups, which are arranged on the two sides of the heat conduction sheet 2. The insulating heat conduction pads 3 in the same group are distributed on the same layer to form an insulating heat conduction layer. All insulating heat conduction pads 3 on the same layer extend to cover the battery cells in the battery modules 1A and 1B in the stacking direction of the battery modules 1A and 1B, i.e. in the first direction, to realize the insulation protection between the battery modules 1. The insulating heat conduction pad 3 is specifically made of heat-conducting silica gel sheet to prevent affecting the heat dissipation between the battery modules 1.

[0046] The opposite outer surfaces of the battery modules 1A and 1B are provided with accommodating grooves 11 for accommodating the insulating heat conduction pads 3, and the depth and groove type of the accommodating grooves 11 depend on the shape and size of the corresponding insulating heat conduction pad 3. The position of the accommodating groove 11 is determined according to the position of the battery cell in the battery modules 1A and 1B.

[0047] Two insulating gaskets 4 are also provided in the battery pack. The two insulating gaskets 4 are respectively arranged on the outer side of the battery modules 1A and 1B along the stacking direction, i.e. Figure 2 the left side of the battery module 1A and the right side of the battery module 1B, to prevent the battery modules 1A and 1B from being broken due to the potential difference between the battery modules 1 and the shell. The shape and position of the insulating gasket 4 extend to cover all the battery cells in the battery modules 1A and 1B.

[0048] The battery pack may also include a pull rod 5 and a threaded fastener 6. One end of the pull rod 5 is provided with a stop, and the other end is provided with a threaded hole. Both battery modules 1A and 1B are provided with connecting holes 12 for the pull rod 5 to pass through, and the orientation of the connecting holes 12 is along the thickness direction of battery modules 1A and 1B.

[0049] During installation, first install the insulating thermal pads 3 into the receiving slots 11 of battery modules 1A and 1B respectively. Then, stack the assembled battery modules 1A and 1B with the thermal pads 2 together, with the thermal pads 2 positioned between battery modules 1A and 1B. From the outer side of battery module 1A corresponding to the stacking direction, i.e., from... Figure 2 A pull rod 5 is installed on the left side of battery module 1A; on the outer side of battery module 1B in the corresponding stacking direction, i.e. from... Figure 2 A threaded fastener 6 is inserted into the right side of battery module 1B to secure battery modules 1A and 1B as a single unit. After securing, a threaded fastener 6 is inserted into the outer side of battery module 1A corresponding to its stacking direction. Figure 2 An insulating pad 4 is attached to the left side of battery module 1A. On the outer side of battery module 1B in the corresponding stacking direction, i.e., from... Figure 2 Insulating pad 4 is also pasted on the right side of battery module 1B. After pasting, battery modules 1A and 1B are installed together in the housing and fixed in the housing with fasteners.

[0050] This utility model also provides an electrical device, which includes any of the battery packs described above. The electrical device can be an electric vehicle such as a motorcycle or electric bicycle, or a consumer electronic product. Consumer electronic products can be audio-visual electronic products such as video recorders, camcorders, radios, tape recorders, stereo systems, record players, and laser disc players, or electronic products such as home electronic health devices and automotive electronic products.

[0051] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

[0052] It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles described in this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

[0053] Finally, it needs to be explained that in this document, the relational terms such as first and second and the like can merely be used to differentiate one entity or action from another, without necessarily requiring or implying any actual relationship or order between or among the entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0054] The battery pack and the electric device provided by the utility model are described in detail above, the principle and implementation mode of the utility model are described by applying specific examples in this document, the description of the above examples is only for helping to understand the structure of the utility model and its core idea; meanwhile, for the general technical personnel in the field, according to the idea of the utility model, the specific implementation mode and application range will have changes, and according to the above, the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A battery pack, characterized by, The battery pack comprises a shell, a battery module (1) and a heat-conducting sheet (2); The battery module (1) is fixedly installed in the shell and is provided with at least two, and the battery module (1) is stacked at least along a first direction; The heat-conducting sheet (2) is clamped between any pair of adjacent battery modules (1), and the heat-conducting sheet (2) is in contact with the shell to conduct heat to the shell.

2. The battery pack of claim 1, wherein, The heat-conducting sheet (2) comprises a main body (21) and a contact portion (22); The main body (21) is a flat sheet, and the main body (21) is clamped between two adjacent battery modules (1); The contact portion (22) is a flat sheet extending from the edge of the main body (21), and the contact portion (22) is in contact with the shell.

3. The battery pack of claim 2, wherein, The heat-conducting sheet (2) is a metal sheet.

4. The battery pack of any one of claims 1-3, wherein, The battery pack further comprises an insulating heat-conducting pad (3); The insulating heat-conducting pad (3) is clamped between any pair of adjacent battery modules (1), and the positive and negative electrodes of the battery modules (1) are arranged along the first direction, and the insulating heat-conducting pad (3) blocks the corresponding battery modules (1) to achieve insulation between adjacent battery modules (1).

5. The battery pack of claim 4, wherein, The insulating heat-conducting pad (3) is provided with at least two and is arranged on the same arrangement plane, and the arrangement plane is clamped between the heat-conducting sheet (2) and the battery module (1).

6. The battery pack of claim 4, wherein, The insulating heat-conducting pad (3) is provided with at least two and is arranged on both sides of the heat-conducting sheet (2).

7. The battery pack of claim 4, wherein, The battery module (1) is provided with a receiving groove (11) on the side surface facing the heat-conducting sheet (2), and / or the heat-conducting sheet (2) is provided with a receiving groove (11) on the side surface facing the battery module (1).

8. The battery pack of claim 1, wherein, The battery pack further comprises an insulating pad (4) arranged at the head and tail of the stacked battery module (1).

9. The battery pack of claim 2 or 3, wherein, The contact portion (22) is provided with an avoiding window (221) for avoiding the lines of the battery module (1).

10. The battery pack of claim 2 or 3, wherein, The contact portion (22) is provided with at least two avoiding windows (221) along the edge of the main body (21).

11. An electrical device, characterized by The use device comprises the battery pack of any one of claims 1-10.

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