Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment, the battery device comprises a tray, a battery cell assembly and a pouring sealant, the tray comprises a bottom plate and a connecting beam, and the connecting beam is connected to the bottom plate; the battery cell assembly is arranged on the bottom plate, a gap is formed between the battery cell assembly and at least part of the connecting beam, and at least part of an electrical device of the battery cell assembly is contained in the gap; the pouring sealant is filled in a gap between the connecting beam and the battery cell assembly, and the pouring sealant at least partially covers the electrical device; wherein the pouring sealant is provided with a liquid storage tank, and a gap is formed between the liquid storage tank and the battery cell assembly. Through the arrangement, condensed water or electrolyte can be prevented from being always attached to the intersection interface of the pouring sealant and the electrical device, so that short circuit of the electrical device can be avoided, ablative battery device abnormity is avoided, and the reliability of the battery device can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery device and electrical equipment. Background Art

[0002] Battery devices usually use potting compounds to seal gaps. However, currently, condensed water or leaked electrolyte is easily generated inside battery devices. The condensed water or electrolyte adheres to the interface between the potting compound and the electrical components of the battery cell, which can easily cause a short circuit in the electrical components and then cause ablation, resulting in abnormal operation of the battery device. Utility Model Content

[0003] The utility model aims to provide a battery device and electrical equipment to solve the problem that the battery device works abnormally due to the ablation of electrical components.

[0004] In order to achieve the purpose of the utility model, the utility model provides the following technical solutions:

[0005] In a first aspect, the utility model provides a battery device, comprising:

[0006] A pallet comprises a bottom plate and a connecting beam, wherein the connecting beam is connected to the bottom plate;

[0007] A battery cell assembly is disposed on the bottom plate, a gap is defined between the battery cell assembly and at least a portion of the connecting beam, and at least a portion of the electrical components of the battery cell assembly is accommodated in the gap; and

[0008] A potting compound is used to fill the gap between the connecting beam and the battery core assembly, and the potting compound at least partially covers the electrical device;

[0009] Wherein, the potting glue is provided with a liquid storage tank, and the liquid storage tank is spaced apart from the battery core assembly.

[0010] In one embodiment, the potting compound includes a first surface and a second surface opposite to each other, the second surface faces the bottom plate, and the liquid storage tank is recessed from the first surface toward the second surface and does not penetrate the second surface.

[0011] In one embodiment, there is a distance H1 between the deepest part of the liquid storage tank and the second surface, which satisfies: 1mm≤H1≤5mm.

[0012] In one embodiment, the liquid storage tank further includes a first side wall and a bottom wall, the first side wall faces the connecting beam, the first side wall connects the first surface and the bottom wall, and an angle Q is formed between the first side wall and the first surface, satisfying: 90°≤Q≤150°.

[0013] In one embodiment, the potting glue also includes a first side surface, the first side surface faces the connecting beam; the end of the bottom wall away from the first side wall is connected to the first side surface; or, the liquid storage tank also includes a second side wall, the second side wall is opposite to the first side wall, and the second side wall connects the first surface and the bottom wall.

[0014] In one embodiment, the battery cell assembly has a bottom surface facing the bottom plate, and a distance H2 is provided between the first surface and the bottom surface, satisfying: H2 ≥ 18.6 mm.

[0015] In one embodiment, the battery cell assembly has a top surface opposite to the bottom plate, the first surface is located between the top surface and the bottom plate, and there is a distance H3 between the first surface and the top surface, satisfying: H3 ≥ 19.6 mm.

[0016] In one embodiment, the cross-sectional shape of the liquid storage tank is any one of a trapezoid, a rectangle, a triangle, and an arc.

[0017] In one embodiment, the volume of the liquid storage tank is 50ml-300ml.

[0018] In one embodiment, the connecting beam includes a first crossbeam and a second crossbeam, the first crossbeam and the second crossbeam are spaced apart in a first direction and both extend along a second direction, and the first direction intersects with the second direction; the battery cell assembly is arranged between the first crossbeam and the second crossbeam, the potting glue is provided between the first crossbeam and the battery cell assembly, the potting glue is provided between the second crossbeam and the battery cell assembly, and the potting glue extends along the second direction.

[0019] In one embodiment, the liquid storage tank penetrates the potting glue along the second direction, or the liquid storage tank is arranged in a local area of ​​the potting glue, or there are multiple liquid storage tanks, and the multiple liquid storage tanks are arranged at intervals along the second direction.

[0020] In one embodiment, the connecting beam also includes a middle beam, which is arranged between the first cross beam and the second cross beam, and the middle beam extends along the second direction. The battery cell assembly is arranged between the first cross beam and the middle beam, and the battery cell assembly is arranged between the second cross beam and the middle beam. The middle beam is provided with a potting glue on both sides of the first direction.

[0021] In one embodiment, the battery cell assembly includes a plurality of battery cells, the plurality of battery cells extend along the first direction and are arranged sequentially in the second direction, and the electrical device is provided at an end of at least one of the battery cells in the first direction.

[0022] In a second aspect, the utility model provides an electrical device, including an electrical device and a battery device as described in any one of the various embodiments of the first aspect, wherein the battery device supplies power to the electrical device.

[0023] By providing the potting glue with a liquid storage tank, the liquid storage tank is spaced apart from the battery cell assembly, and the liquid storage tank can store liquid, so that condensed water or electrolyte generated at the intersection interface of the potting glue and the electrical device can flow into the liquid storage tank, and the liquid storage tank is spaced apart from the battery cell assembly, so as to prevent condensed water or electrolyte from always adhering to the intersection interface of the potting glue and the electrical device, thereby preventing the electrical device from short-circuiting and preventing ablation from causing abnormality of the battery device, thereby improving the reliability of the battery device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 is a top view of a battery device according to an embodiment;

[0026] Figure 2 yes Figure 1 A cross-sectional view along the EE direction;

[0027] Figure 3 yes Figure 2 A partial enlarged view of the middle A;

[0028] Figure 4 yes Figure 2 A partial enlarged view of point B in the middle;

[0029] Figure 5 yes Figure 3 A partial enlarged view of point C in the middle;

[0030] Figure 6 1. It is a top view of the potting glue of several embodiments;

[0031] Figure 7 is a cross-sectional view of a potting compound according to an embodiment;

[0032] Figure 8 is a cross-sectional view of a potting compound according to another embodiment.

[0033] Description of reference numerals:

[0034] 100-battery device;

[0035] 10-tray, 11-bottom plate, 12-connecting beam, 121-first cross beam, 122-second cross beam, 123-first longitudinal beam, 124-second longitudinal beam, 125-middle beam;

[0036] 20 - battery cell assembly, 21 - battery cell, 211 - bottom surface, 212 - top surface, 22 - first pole, 23 - connecting piece, 24 - voltage collection boss, 25 - explosion-proof valve, 26 - second pole;

[0037] 30 - potting glue, 31 - liquid storage tank, 32 - first surface, 33 - second surface, 34 - bottom wall, 35 - first side wall, 36 - first side surface, 37 - second side wall, 38 - second side surface. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0040] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meaning as those commonly understood by technicians in the technical field of this utility model. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used in this utility model includes any and all combinations of one or more related listed items.

[0041] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0042] Please refer to Figure 1 and Figure 2 The embodiment of the utility model provides a battery device 100, including a tray 10, a battery cell assembly 20 and a potting compound 30.

[0043] For convenience of description, a coordinate system XYZ is established, wherein the first direction X is the length direction of the battery device 100 , the second direction Y is the width direction of the battery device 100 , and the third direction Z is the height direction of the battery device 100 . The first direction X, the second direction Y and the third direction Z intersect each other.

[0044] The tray 10 includes a bottom plate 11 and a connecting beam 12 , wherein the connecting beam 12 is connected to the bottom plate 11 .

[0045] Specifically, the connecting beam 12 includes a first crossbeam 121, a second crossbeam 122, a first longitudinal beam 123, and a second longitudinal beam 124. The first crossbeam 121 and the second crossbeam 122 are arranged at intervals in the first direction X and extend along the second direction Y. The first longitudinal beam 123 and the second longitudinal beam 124 are arranged at intervals in the second direction Y and extend along the first direction X. The two ends of the first crossbeam 121 are respectively connected to the ends of the first longitudinal beam 123 and the second longitudinal beam 124, and the two ends of the second crossbeam 122 are respectively connected to the ends of the first longitudinal beam 123 and the second longitudinal beam 124. The first crossbeam 121, the second crossbeam 122, the first longitudinal beam 123, and the second longitudinal beam 124 are connected to the four peripheral edges of the bottom plate 11, and together with the bottom plate 11, they enclose a receiving space. The first crossbeam 121, the second crossbeam 122, the first longitudinal beam 123, and the second longitudinal beam 124 can be an integrated structure or a split structure, without limitation. The first cross beam 121 , the second cross beam 122 , the first longitudinal beam 123 , the second longitudinal beam 124 and the bottom plate 11 may also be an integrated structure or a split structure, without limitation.

[0046] Optionally, the connecting beam 12 further includes an intermediate beam 125, which is disposed between the first cross beam 121 and the second cross beam 122, and extends along the second direction Y, and the two ends of the intermediate beam 125 are respectively connected to the first longitudinal beam 123 and the second longitudinal beam 124. The intermediate beam 125 divides the receiving space into a plurality of spaces. The intermediate beam 125 can be an integrated structure with the first cross beam 121, the second cross beam 122, the first longitudinal beam 123 and the second longitudinal beam 124, or a split structure, without limitation. There can be one or more intermediate beams 125, and when there are multiple intermediate beams 125, the multiple intermediate beams 125 are spaced apart in the first direction X to divide the receiving space into a plurality of substantially uniform spaces.

[0047] The specific structure of the bottom plate 11 and the connecting beam 12 is not limited. They may be provided with foam for insulation and various holes for installation, etc., which are not limited.

[0048] The battery cell assembly 20 is disposed on the bottom plate 11 and accommodated in a receiving space enclosed by the bottom plate 11 and the connecting beam 12 . There is a gap between the battery cell assembly 20 and at least part of the connecting beam 12 , and the gap is used to accommodate the electrical devices of the battery cell assembly 20 .

[0049] The cell assembly 20 is disposed between the first cross beam 121 and the second cross beam 122, and between the first longitudinal beam 123 and the second longitudinal beam 124. In the embodiment with the middle beam 125, the cell assemblies 20 are respectively accommodated in the plurality of spaces formed by the middle beam 125 dividing the accommodation space, that is, the cell assemblies 20 are disposed on both sides of the middle beam 125 in the first direction X.

[0050] There is a gap between at least one of the first cross beam 121, the second cross beam 122, the first longitudinal beam 123, and the second longitudinal beam 124 and the battery cell assembly 20. In the embodiment with the middle beam 125, there is a gap between at least one of the first cross beam 121, the second cross beam 122, the first longitudinal beam 123, the second longitudinal beam 124, and the middle beam 125 and the battery cell assembly 20.

[0051] The electrical components of the battery cell assembly 20 can be any type of charged components, including but not limited to positive and negative poles, collectors, connecting pieces 23, signal terminals, flexible printed circuits (FPCs), bic (information collection device) circuit boards, etc.

[0052] The potting glue 30 fills the gap between the connecting beam 12 and the battery cell assembly 20 , and the potting glue 30 at least partially covers the electrical device.

[0053] In the current conventional design, only the gap between the connecting beam 12 and the battery cell assembly 20 is filled with potting glue 30, and the upper surface of the potting glue 30 (i.e., the surface of the potting glue 30 facing away from the bottom plate 11) and the electrical device will have an intersection interface. The intersection interface refers to the position near the connection and intersection of the surface and the surface of the electrical device. One side of the surface in the third direction Z is the potting glue 30, and the other side is the receiving space in the tray 10. Condensation water will form in the receiving space, and the electrolyte leaked from the battery cell assembly 20 will also leak out from the receiving space near the potting glue 30. Finally, condensation water or electrolyte will form on the surface and may flow to the position near the connection and intersection of the surface and the electrical device, that is, to the intersection interface. Condensation water or electrolyte will accumulate at the intersection interface, and the condensation water or electrolyte will adhere to the electrical device and is difficult to discharge, which will cause the electrical device to short-circuit and then ablate.

[0054] The above problem is caused by: a ventilation valve (not shown) is provided on the tray 10, which can be set at any position of the bottom plate 11 and the connecting beam 12, and the ventilation valve is used to ventilate the receiving space with the external environment. The moisture in the air in the external environment is easy to condense under special working conditions, and then adhere to the intersection interface between the potting glue 30 and the electrical device. The electrolyte in the battery cell assembly 20 may also leak and adhere to the intersection interface between the potting glue 30 and the electrical device.

[0055] The utility model improves the above problems. Specifically, the potting glue 30 is provided with a liquid storage tank 31, and the liquid storage tank 31 is spaced apart from the battery cell assembly 20. The liquid storage tank 31 can be of any shape and can be provided at any position of the liquid storage tank 31, as long as the function of storing liquid can be realized.

[0056] In this way, the condensed water or electrolyte generated at the intersection interface between the potting glue 30 and the electrical device can flow into the liquid storage tank 31, and the liquid storage tank 31 is spaced apart from the battery cell assembly 20 to prevent the condensed water or electrolyte from always adhering to the intersection interface between the potting glue 30 and the electrical device.

[0057] The battery device 100 provided by the embodiment of the utility model is provided with a liquid storage tank 31 by setting the potting glue 30. The liquid storage tank 31 is spaced apart from the battery cell assembly 20. The liquid storage tank 31 can store liquid, so that condensed water or electrolyte generated at the intersection interface between the potting glue 30 and the electrical device can flow into the liquid storage tank 31. The liquid storage tank 31 is spaced apart from the battery cell assembly 20, so as to prevent condensed water or electrolyte from always adhering to the intersection interface between the potting glue 30 and the electrical device, thereby preventing the electrical device from short-circuiting and preventing ablation from causing abnormality of the battery device 100, thereby improving the reliability of the battery device 100.

[0058] In one embodiment, reference Figure 1 and Figure 2 A potting glue 30 is provided between the first crossbeam 121 and the battery cell assembly 20 , a potting glue 30 is provided between the second crossbeam 122 and the battery cell assembly 20 , and the potting glue 30 extends along the second direction Y.

[0059] Among them, there is a gap between the first crossbeam 121 and the battery cell assembly 20, and there is a gap between the second crossbeam 122 and the battery cell assembly 20. Electrical devices can be provided in the gaps between the two crossbeams and the battery cell assembly 20. The potting glue 30 is arranged in the two gaps. The condensed water or electrolyte is stored in the liquid storage tank 31 opened on the potting glue 30. The potting glue 30 can be arranged at different positions of the battery device 100, so as to store the condensed water or electrolyte at different positions and avoid ablation of the electrical devices at different positions.

[0060] Combination Figures 3 to 5 In the embodiment with the middle beam 125, a battery cell assembly 20 is provided between the first cross beam 121 and the middle beam 125, a battery cell assembly 20 is provided between the second cross beam 122 and the middle beam 125, and a potting glue 30 is provided on both sides of the middle beam 125 in the first direction X.

[0061] In this way, various electrical devices can be arranged at both ends of the battery cell assembly 20 in the first direction X. By arranging potting glue 30 at both ends of the battery cell assembly 20 in the first direction X and providing a liquid storage tank 31 on the potting glue 30, the problem of electrical device burnout can be solved, ensuring that the battery cell assembly 20 will not malfunction due to the burnout of electrical devices.

[0062] In one embodiment, reference Figure 1 and Figure 2 The battery cell assembly 20 includes a plurality of battery cells 21 , which extend along a first direction X and are arranged sequentially in a second direction Y. An electrical device is provided at an end of at least one battery cell 21 in the first direction X.

[0063] The battery cell 21 may be a bare battery cell or a shelled battery cell without limitation. Each battery cell 21 is roughly in the shape of a cuboid, with a length direction being a first direction X, a thickness direction being a second direction Y, and a height direction being a third direction Z. The battery cell 21 is provided with electrical devices at the end in the first direction X, and some electrical devices may be provided at one of the two ends, and some other electrical devices may be provided at the other end.

[0064] Exemplary, reference Figure 2 and Figure 3 , the electrical devices provided at the end of the battery cell 21 facing the first crossbeam 121 may include a first pole 22, a connecting piece 23, a voltage collection boss 24, a collector (not shown), etc., and an explosion-proof valve 25 may also be provided at this end. The voltage collection boss 24 is arranged in the vicinity of the end of the battery cell 21 near the bottom plate 11, and is used to collect the voltage between the positive and negative poles of the battery cell 21. The first pole 22 is arranged in the middle area of ​​the end of the battery cell 21 in the third direction Z, and is used to input and output current. The connecting piece 23 connects the first poles 22 of two adjacent battery cells 21 in the second direction Y, so that multiple battery cells 21 are connected in series or in parallel. The explosion-proof valve 25 is arranged in the vicinity of the end of the battery cell 21 away from the bottom plate 11, and is used to rupture to exhaust gas when the gas pressure of the battery device 100 is abnormal. The collector can be connected to the voltage collection boss 24, or to other positions at the end of the battery cell 21. The collector extends to the gap between the battery cell 21 and the first crossbeam 121. The collector is used to collect parameters of the battery cell 21, such as voltage, current, etc., without limitation. A potting glue 30 is provided in the gap between the battery cell 21 and the first crossbeam 121. The potting glue 30 is in contact with the first crossbeam 121, the bottom plate 11 and the battery cell 21. The potting glue 30 covers the voltage collection boss 24, but does not cover the first pole 22 and the connecting piece 23, and the explosion-proof valve 25.

[0065] Exemplary, reference Figure 2 and Figure 4, the electrical devices provided at the end of the battery cell 21 facing the second crossbeam 122 may include a second pole 26, a connecting piece 23, a voltage collection boss 24, a collector (not shown), etc., and an explosion-proof valve 25 may also be provided at this end. The second pole 26 has an opposite polarity to the first pole 22. The arrangement of the above-mentioned electrical devices is roughly the same as the arrangement of the electrical devices at the end of the battery cell 21 facing the first crossbeam 121, which can be used as a reference. The explosion-proof valve 25 can also refer to the above arrangement and will not be repeated. Among them, the potting glue 30 filled in the gap between the battery cell 21 and the second crossbeam 122 covers the voltage collection boss 24, the second pole 26 and the connecting piece 23, but does not cover the explosion-proof valve 25.

[0066] Exemplary, reference Figure 2 and Figure 5 In the embodiment with the middle beam 125, taking the middle beam 125 as one example, the electrical components arranged at the end of the cell 21 of the cell assembly 20 between the first cross beam 121 and the middle beam 125 facing the middle beam 125 may include the second pole 26, the connecting piece 23, etc., and the explosion-proof valve 25 may also be arranged at the end. Compared with the electrical components at the end facing the first cross beam 121, the voltage collection boss 24 and the collector may not be arranged at the end. The potting glue 30 at the end covers the area near the end of the cell 21 close to the bottom plate 11, but does not cover the second pole 26, the connecting piece 23 and the explosion-proof valve 25.

[0067] The electrical components disposed at the end of the cell 21 of the cell assembly 20 between the second cross beam 122 and the middle beam 125 toward the middle beam 125 may include a first pole 22, a connecting piece 23, etc., and an explosion-proof valve 25 may also be disposed at this end. Compared with the electrical components at the end toward the second cross beam 122, the end may not be provided with a voltage collection boss 24 and a collector. The potting glue 30 covers the second pole 26 and the connecting piece 23, but does not cover the explosion-proof valve 25.

[0068] It should be understood that the heights of the potting glue 30 disposed at both ends of the battery cell assembly 20 in the first direction X (ie, the size in the third direction Z) may be the same or different, without limitation.

[0069] Optionally, the height of the potting glue 30 set at both ends of the same battery cell assembly 20 in the first direction X may be the same, and the height of the potting glue 30 set at both ends of different battery cell assemblies 20 in the first direction X may be different. Exemplarily, in an embodiment with one middle beam 125, the height of the potting glue 30 set at both ends of the battery cell assembly 20 located between the first crossbeam 121 and the middle beam 125 in the first direction X is lower than the height of the potting glue 30 set at both ends of the battery cell assembly 20 located between the second crossbeam 122 and the middle beam 125 in the first direction X. This is because the voltages of the battery cell assemblies 20 on both sides of the middle beam 125 in the first direction X are different, and setting potting glue 30 of different heights can meet the insulation performance requirements between different battery cell assemblies 20 and the connecting beam 12 and the bottom plate 11.

[0070] It should be understood that there may also be a gap between the battery cell assembly 20 and the first longitudinal beam 123 and the second longitudinal beam 124 and a potting glue 30 may be provided, and the potting glue 30 at this position may not have a liquid storage tank 31. This is because the first longitudinal beam 123 and the second longitudinal beam 124 are opposite to the side of the battery cell 21 of the battery cell assembly 20 in the thickness direction, and this side is usually not provided with electrical devices, and the problem of electrical device ablation will basically not occur. In addition, there may also be a narrow gap width (i.e., the size in the first direction X) between the battery cell assembly 20 and the first longitudinal beam 123 and the second longitudinal beam 124, and it is also difficult to open a liquid storage tank 31 on the potting glue 30. Of course, there may also be a larger gap between the battery cell assembly 20 and the first longitudinal beam 123 and the second longitudinal beam 124, and a potting glue 30 may also be provided to open a liquid storage tank 31. Of course, the first longitudinal beam 123 and the second longitudinal beam 124 may also be in direct contact with the battery cell assembly 20 without a gap, so there is no need to provide a potting glue 30.

[0071] refer to Figure 2 , Figure 3 and Figure 6 There is no limitation on the arrangement of the liquid storage tank 31. For example, taking the potting glue 30 arranged between the first cross beam 121 and the battery cell assembly 20 as an example, the potting glue 30 extends along the second direction Y.

[0072] Optional, such as Figure 6 As shown in the figure on the left, the liquid storage tank 31 penetrates the potting glue 30 along the second direction Y, and the two ends of the liquid storage tank 31 in the second direction Y are closed by the first longitudinal beam 123 and the second longitudinal beam 124.

[0073] Optional, such as Figure 6 As shown in the middle figure, the liquid storage tank 31 is arranged in a local area of ​​the potting glue 30 , and both ends of the liquid storage tank 31 in the second direction Y are located on the potting glue 30 .

[0074] Optional, such as Figure 6As shown in the figure on the right, there are multiple liquid reservoirs 31, and the multiple liquid reservoirs 31 are spaced apart along the second direction Y, wherein the multiple liquid reservoirs 31 may all be on the potting glue 30 without penetrating the end of the potting glue 30 in the second direction Y. Of course, the outermost liquid reservoir 31 in the second direction Y may also penetrate the end of the potting glue 30 in the second direction Y. The multiple liquid reservoirs 31 may be arranged at equal intervals or at unequal intervals, and the length of each liquid reservoir 31 (i.e., the size in the second direction Y) may be equal or unequal, without limitation.

[0075] It is understandable that the liquid storage tank 31 may also be arranged in other ways, which will not be described in detail.

[0076] Optionally, the cross-sectional shape of the liquid storage tank 31 is any one of a trapezoid, a rectangle, a triangle, and an arc. The cross-sectional shape of the liquid storage tank 31 refers to the approximate shape enclosed by the inner wall of the liquid storage tank 31. The cross-sectional shape of the liquid storage tank 31 can be any one of the above, and can also be any other feasible shape, without limitation.

[0077] In one embodiment, reference Figure 3 , Figure 7 and Figure 8 The potting glue 30 includes a first surface 32 and a second surface 33 facing each other. The second surface 33 faces the bottom plate 11 . The liquid storage tank 31 is recessed from the first surface 32 to the second surface 33 and does not penetrate the second surface 33 .

[0078] Among them, the first surface 32 and the second surface 33 can be a plane or a curved surface without limitation. The first surface 32 is the upper surface of the potting glue 30, and the first surface 32 has an intersection interface with the electrical device. After the condensed water or electrolyte accumulates on the first surface 32, the first surface 32 is recessed to form a reservoir 31, and the condensed water or electrolyte will flow into the reservoir 31 to avoid being accumulated on the first surface 32 all the time, thereby preventing the condensed water or electrolyte from being always on the intersection interface and causing ablation of the electrical device. The reservoir 31 does not penetrate the second surface 33, so that the condensed water or electrolyte is always stored in the reservoir 31 and will not leak out. If it penetrates the second surface 33, the condensed water or electrolyte may flow to the second surface 33 and then flow between the bottom plate 11 and the battery cell assembly 20 to cause a short circuit problem.

[0079] refer to Figure 7 and Figure 8, there is a distance H1 between the deepest part of the liquid storage tank 31 and the second surface 33, satisfying: 1mm≤H1≤5mm. Exemplarily, the liquid storage tank 31 includes a bottom wall 34, and the bottom wall 34 may be a plane or a curved surface, and H1 is the shortest distance between the bottom wall 34 and the second surface 33. Exemplarily, when the cross-section of the liquid storage tank 31 is a triangle, the liquid storage tank 31 may also have no bottom wall. H1 can specifically be 1mm, 2mm, 3mm, 4mm, 5mm, etc., without limitation. Setting H1 in this range, the distance between the deepest part of the liquid storage tank 31 and the second surface 33 is moderate, which can not only ensure the strength, but also make the liquid storage tank 31 have a deeper depth, and can store a larger amount of condensed water or electrolyte. If H1 is less than 1 mm, the distance between the deepest part of the liquid reservoir 31 and the second surface 33 is too small, and the distance between the deepest part of the liquid reservoir 31 and the second surface 33 is too thin. The vibration of the battery device 100 during transportation or use may cause cracks here, which may cause condensed water or electrolyte to leak to the second surface 33. If H1 is greater than 5 mm, the distance between the deepest part of the liquid reservoir 31 and the second surface 33 is too large, and the distance between the deepest part of the liquid reservoir 31 and the second surface 33 is too thick, which may cause the depth of the liquid reservoir 31 to be insufficient, and the amount of stored condensed water or electrolyte is insufficient. Condensed water or electrolyte may overflow to the first surface 32 and then to the intersection interface, causing electrical device ablation.

[0080] In one embodiment, reference Figure 7 and Figure 8 The liquid storage tank 31 includes a bottom wall 34 and a first side wall 35. The first side wall 35 faces the connecting beam 12. The first side wall 35 connects the first surface 32 and the bottom wall 34. An angle Q is formed between the first side wall 35 and the first surface 32, satisfying: 90°≤Q≤150°.

[0081] by Figure 2 For example, the potting glue 30 between the first crossbeam 121 and the battery cell assembly 20 at A in the middle Figure 7 and Figure 8 The first side wall 35 of the liquid storage tank 31 opened by the potting glue 30 faces the first crossbeam 121, and the first side wall 35 faces away from the battery cell assembly 20. The condensed water or electrolyte at the intersection interface on the first surface 32 (the area on the first surface 32 near the battery cell assembly 20) will flow from the first side wall 35 to the liquid storage tank 31. The first side wall 35 can be a plane or a curved surface without limitation. The angle between the first side wall 35 and the first surface 32 can be the angle between two planes (that is, two planes when the first surface 32 and the first side wall 35 are both planes). If at least one of the first surface 32 and the first side wall 35 is a non-plane, the non-plane first surface 32 and the first side wall 35 can be fitted into two planes and then the angle can be measured.

[0082] One way to make the liquid reservoir 31 is to first use a tool to extend from the top to the bottom of the tray 10 into the gap between the connecting beam 12 and the battery cell assembly 20, then pour the high-temperature molten potting glue 30, demold it after cooling, remove the tool, and then obtain the potting glue 30 with the liquid reservoir 31. The tool can be any shape and structure, such as "L", "T", etc., without limitation.

[0083] The angle Q can be specifically 90°, 100°, 110°, 120°, 130°, 140°, 150°, etc., without limitation. When the angle Q satisfies the above range, the liquid reservoir 31 is easy to manufacture, and the volume of the liquid reservoir 31 is large enough. If the angle Q is less than 90°, the liquid reservoir 31 forms a constricted shape, that is, the bottom of the liquid reservoir 31 (the side close to the bottom wall 34) is wider, and the opening (the side close to the first surface 32) is narrower, making it difficult to demold. If the angle Q is greater than 150°, the inclination of the first side wall 35 is too large, and the width of the potting glue 30 (that is, the size in the first direction X) is relatively limited. If the inclination of the first side wall 35 is too large, the depth of the liquid reservoir 31 will be insufficient, which will lead to insufficient volume.

[0084] In one embodiment, reference Figure 2 , Figure 3 , Figure 7 and Figure 8 The potting glue 30 also includes a first side surface 36, which faces the connecting beam 12 and can be close to or spaced apart from the connecting beam 12. Figure 2 For example, the potting glue 30 between the first crossbeam 121 and the battery cell assembly 20 at A in the middle Figure 7 and Figure 8 , the first side surface 36 is in close contact with the first cross beam 121 .

[0085] Optional, reference Figure 3 and Figure 7 , one end of the bottom wall 34 away from the first side wall 35 is connected to the first side surface 36. In other words, the liquid storage tank 31 passes through the first side surface 36, so that the surface of the first crossbeam 121 facing the battery cell assembly 20 serves as the other side wall of the liquid storage tank 31 opposite to the first side wall 35, as shown in FIG. Figure 7 The dotted line indicates that the first cross beam 121 faces the surface of the battery cell assembly 20 , and the surface is flush with the first side surface 36 .

[0086] Alternatively, refer to Figure 3 and Figure 8 The liquid storage tank 31 further includes a second side wall 37, which is opposite to the first side wall 35 and connects the first surface 32 and the bottom wall 34. In other words, the liquid storage tank 31 does not penetrate the first side wall 36, but is opened in the middle of the potting glue 30, and the first side wall 36 connects the first surface 32 and the second surface 33.

[0087] The width of the liquid storage tank 31 (ie, the dimension in the first direction X) is, for example, 4 mm to 10 mm, which is not limited in the embodiment of the present utility model.

[0088] The potting glue 30 further includes a second side surface 38, which faces the battery cell assembly 20 and connects the first surface 32 and the second surface 33. The second side surface 38 is opposite to the first side surface 36, and the second side surface 38 is in close contact with the battery cell assembly 20.

[0089] For the potting glue 30 between the battery cell assembly 20 and the second cross beam 122 , and the potting glue 30 on both sides of the middle beam 125 in the first direction X, a liquid storage tank 31 may also be provided in a similar manner, which will not be described in detail.

[0090] refer to Figure 2 and Figure 3 The battery cell assembly 20 has a bottom surface 211 facing the bottom plate 11, and a distance H2 is provided between the first surface 32 and the bottom surface 211, satisfying: H2 ≥ 18.6 mm.

[0091] Among them, the bottom surface 211 can be flush or flush with the second surface 33 without limitation. The bottom surface 211 can be a plane or a curved surface, and H2 refers to the minimum distance between the first surface 32 and the bottom surface 211. H2 meets the above range, can cover part of the electrical components, and play an insulating role between the battery cell assembly 20 and the connecting beam 12. At the same time, the height is sufficient to open the liquid storage tank 31. If H2 is less than 18.6mm, the coverage of the electrical components is insufficient, and the insulation effect between the battery cell assembly 20 and the connecting beam 12 may be insufficient, which may cause arcing and fire. In addition, the depth of the opened liquid storage tank 31 is not enough, and it may not play a role in preventing the ablation of electrical components.

[0092] refer to Figure 2 and Figure 4 The battery cell assembly 20 has a top surface 212 opposite to the bottom plate 11 , the first surface 32 is located between the top surface 212 and the bottom plate 11 , and there is a distance H3 between the first surface 32 and the top surface 212 , satisfying: H3 ≥ 19.6 mm.

[0093] The top surface 212 may be a plane or a curved surface, and H3 refers to the minimum distance between the first surface 32 and the top surface 212. When H3 satisfies the above range, the explosion-proof valve 25 disposed near the top surface 212 can be not covered by the potting compound 30, thereby ensuring a normal explosion-proof function. If H3 is less than 19.6 mm, the potting compound 30 may cover the explosion-proof valve 25, causing the explosion-proof valve 25 to fail to open normally for pressure relief, thereby causing the battery device 100 to have an explosion risk.

[0094] It should be understood that, according to different types and specifications of battery devices 100 , the height of the potting glue 30 (ie, the size in the third direction Z) can be set as needed without limitation.

[0095] By providing the potting glue 30 and the liquid storage tank 31 with the above-mentioned sizes, the volume of the liquid storage tank 31 is made larger, and a large amount of condensed water or electrolyte can be stored to avoid ablation of electrical components.

[0096] Optionally, the volume of the liquid storage tank 31 is 50ml-300ml. Specifically, the volume of the liquid storage tank 31 can be 50ml, 100ml, 150ml, 200ml, 250ml, 300ml, etc., without limitation. The volume of the liquid storage tank 31 can be achieved by adopting designs of different shapes, sizes, etc., and the utility model does not limit this.

[0097] Compared with the potting glue 30 of the conventional battery device 100 , under the condition of the same height, the utility model can save 100ml-600ml of the potting glue 30 due to the provision of the liquid storage tank 31 , thereby reducing the cost.

[0098] The embodiment of the utility model further provides an electric device, comprising an electric device and the battery device 100 of any of the above embodiments, wherein the battery device 100 supplies power to the electric device.

[0099] The power device may be an industrial power load, a commercial power load, a household power load, etc., without limitation. The battery device 100 may be applied to the field of energy storage batteries or the field of power batteries, without limitation.

[0100] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship described in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0101] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A battery device, characterized in that: include: A pallet comprises a bottom plate and a connecting beam, wherein the connecting beam is connected to the bottom plate; A battery cell assembly is arranged on the bottom plate, a gap is formed between the battery cell assembly and at least a part of the connecting beam, and at least a part of the electrical components of the battery cell assembly is accommodated in the gap; as well as A potting compound is used to fill the gap between the connecting beam and the battery core assembly, and the potting compound at least partially covers the electrical device; The potting glue is provided with a liquid storage tank, and the liquid storage tank is spaced apart from the battery core assembly.

2. The battery device according to claim 1, characterized in that: The potting compound comprises a first surface and a second surface opposite to each other, the second surface faces the bottom plate, and the liquid storage tank is recessed from the first surface to the second surface and does not penetrate the second surface.

3. The battery device according to claim 2, characterized in that: There is a distance H1 between the deepest part of the liquid storage tank and the second surface, which satisfies: 1mm≤H1≤5mm.

4. The battery device according to claim 2, characterized in that: The liquid storage tank also includes a first side wall and a bottom wall, the first side wall faces the connecting beam, the first side wall connects the first surface and the bottom wall, and an angle Q is formed between the first side wall and the first surface, satisfying: 90°≤Q≤150°.

5. The battery device according to claim 4, characterized in that: The potting glue further includes a first side surface, and the first side surface faces the connecting beam; One end of the bottom wall away from the first side wall is connected to the first side surface; or, The liquid storage tank further includes a second side wall, the second side wall is opposite to the first side wall, and the second side wall connects the first surface and the bottom wall.

6. The battery device according to claim 2, characterized in that: The battery cell assembly has a bottom surface facing the bottom plate, and a distance H2 is provided between the first surface and the bottom surface, satisfying: H2≥18.6 mm.

7. The battery device according to claim 2, characterized in that: The battery cell assembly has a top surface opposite to the bottom plate, the first surface is located between the top surface and the bottom plate, and there is a distance H3 between the first surface and the top surface, satisfying: H3≥19.6 mm.

8. The battery device according to claim 1, characterized in that: The cross-sectional shape of the liquid storage tank is any one of a trapezoid, a rectangle, a triangle, and an arc.

9. The battery device according to claim 1, characterized in that: The volume of the liquid storage tank is 50ml-300ml.

10. The battery device according to any one of claims 1 to 9, characterized in that: The connecting beam includes a first crossbeam and a second crossbeam, the first crossbeam and the second crossbeam are spaced apart in a first direction and both extend along a second direction, and the first direction intersects with the second direction; the battery cell assembly is arranged between the first crossbeam and the second crossbeam, the potting glue is provided between the first crossbeam and the battery cell assembly, the potting glue is provided between the second crossbeam and the battery cell assembly, and the potting glue extends along the second direction.

11. The battery device according to claim 10, characterized in that: The liquid storage tank penetrates the potting glue along the second direction, or the liquid storage tank is arranged in a local area of ​​the potting glue, or there are multiple liquid storage tanks, and the multiple liquid storage tanks are arranged at intervals along the second direction.

12. The battery device according to claim 10, characterized in that: The connecting beam also includes a middle beam, which is arranged between the first cross beam and the second cross beam, and the middle beam extends along the second direction. The battery cell assembly is arranged between the first cross beam and the middle beam, and the battery cell assembly is arranged between the second cross beam and the middle beam. The middle beam is provided with a potting glue on both sides of the first direction.

13. The battery device according to claim 10, characterized in that: The battery cell assembly includes a plurality of battery cells, the plurality of battery cells extend along the first direction and are arranged in sequence in the second direction, and the electrical device is provided at an end of at least one of the battery cells in the first direction.

14. An electrical device, characterized in that: It comprises an electric device and a battery device as claimed in any one of claims 1 to 13, wherein the battery device supplies power to the electric device.

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