Battery pack and electric equipment

Abstract

The utility model provides a battery pack and electric equipment, relates to the technical field of batteries, and aims to solve the technical problem that turbulence occurs when cold air in the battery pack is blown to a battery cell module. The battery pack comprises a box body, a battery cell module and a fan, the battery cell module is arranged in the box body; the fan is fixed on the box body, and the air outlet direction of the fan faces the battery cell module; wherein the battery cell module comprises a plurality of battery cell rows arranged in the air outlet direction of the fan, each battery cell row comprises a plurality of battery cells, an included angle is formed between the arrangement direction of the battery cells and the air outlet direction of the fan, and the included angle is larger than 0 degree and smaller than 90 degrees.

Description

Technical Field

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

[0002] In the related art, the battery pack includes a cell module and a cooling fan. The cell module includes cells arranged in an array, and the air outlet direction of the cooling fan is usually perpendicular to the arrangement direction of multiple cells in the cell module close to the cooling fan. With this arrangement, when the cold air blown by the cooling fan reaches the surface of the multiple cells, it is blocked by the cells and disperses toward the cells on both sides of the arrangement direction, which can easily cause the cold air flow to become disordered and obvious turbulence to appear. The appearance of turbulence will increase energy loss, resulting in poor heat dissipation of the battery pack. Utility Model Content

[0003] The embodiments of the utility model provide a battery pack and an electrical device, which can improve the technical problem of turbulence when cold air in the battery pack blows toward the battery cell module.

[0004] In a first aspect, an embodiment of the utility model provides a battery pack, comprising: a case, a battery cell module and a fan; the battery cell module is arranged in the case; the fan is fixed on the case, and the air outlet direction of the fan is toward the battery cell module; wherein the battery cell module comprises a plurality of groups of battery cell rows arranged along the air outlet direction of the fan, each group of battery cell rows comprises a plurality of battery cells, and an angle is formed between the arrangement direction of the plurality of battery cells and the air outlet direction of the fan, and the angle is greater than 0 and less than 90°.

[0005] In one embodiment, the angle is greater than or equal to 45° and less than or equal to 75°.

[0006] In one embodiment, the angle is equal to 60°.

[0007] In one embodiment, the battery cell module further includes a battery cell bracket, and the battery cell bracket is provided with a plurality of mounting holes for mounting the battery cells, and each mounting hole corresponds to a battery cell.

[0008] In one embodiment, the battery cell support includes an inclined surface close to the fan, and an extending direction of the inclined surface is consistent with an arrangement direction of the plurality of battery cells.

[0009] In one embodiment, a card slot is provided on the battery cell bracket; the battery cell module further includes a bus bar, the bus bar is provided in the card slot, and the bus bar is electrically connected to each battery cell.

[0010] In one embodiment, the battery cell bracket is provided with two groups, and the two groups of battery cell brackets are arranged on both sides of the battery cell module; the battery cell module also includes a bracket connector, and both ends of the bracket connector are respectively connected to a group of battery cell brackets.

[0011] In one embodiment, the battery cell module further includes a circuit board and a temperature detection element electrically connected to the circuit board, and the temperature detection element is used to detect the temperature of the battery cell adjacent thereto.

[0012] In one embodiment, the box body has a side wall, and the battery cells in each battery cell row close to the side wall form a battery cell column, the angle between the battery cell column and the battery cell row close to the fan is an obtuse angle, and the battery cell column and the side wall are spaced apart and jointly define a heat dissipation channel.

[0013] In a second aspect, an embodiment of the utility model provides an electrical device, which includes a battery pack as described in any of the above embodiments.

[0014] Beneficial effects of the embodiments of the utility model:

[0015] In an embodiment of the utility model, by setting the angle between the arrangement direction of multiple battery cells and the air outlet direction of the fan to an acute angle, the surface of the battery cell row closest to the fan can guide the cold air blown out by the fan, thereby improving the technical problem of obvious disturbance and turbulence of the cold air when blowing toward the surface of the battery cell row closest to the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the structure of a battery pack provided by an embodiment of the utility model;

[0018] Figure 2 It is a schematic diagram of the assembly structure of the battery module provided by the embodiment of the utility model;

[0019] Figure 3 It is a schematic diagram of the relative position relationship between the battery module and the fan provided in the embodiment of the utility model;

[0020] Figure 4 It is a schematic diagram of the exploded structure of the battery module provided by the embodiment of the utility model;

[0021] Figure 5It is a structural schematic diagram of an electrical device provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present disclosure, and are not used to limit the present disclosure. In the present disclosure, unless otherwise stated, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0023] In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "examples", or "some examples" are intended to indicate that a specific feature, structure, material, or characteristic associated with the embodiment or example is included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials, or characteristics may be included in any one or more embodiments or examples in any appropriate manner.

[0024] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0025] When describing some embodiments, the term "connected" and its derivative expressions may be used. For example, when describing some embodiments, the term "connected" may be used to indicate that two or more components are in direct physical or electrical contact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

[0026] As used herein, "approximately" includes the stated values ​​and averages that are within an acceptable range of deviation from the particular value, where the acceptable range of deviation is determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

[0027] “A and / or B” includes the following three combinations: A only, B only, and a combination of A and B.

[0028] The battery pack is usually a relatively closed system, and the battery cell module in the battery pack will emit a lot of heat during operation. This part of the heat accumulated in the battery pack will affect the operation of the battery cell module and shorten the service life of the battery cells in the battery cell module. Therefore, it is often necessary to add a cooling fan to the battery pack to dissipate the heat of the battery cell module to ensure the normal operation of the battery cell module.

[0029] In the related art, the battery module includes battery cells arranged in an array, and the air outlet direction of the cooling fan is usually perpendicular to the arrangement direction of the multiple battery cells on the side close to the cooling fan in the battery module. With this arrangement, when the cold air blown by the cooling fan reaches the surface of the multiple battery cells, it is blocked by the battery cells and disperses toward the battery cells on both sides of the arrangement direction, which can easily cause the cold air flow to become turbulent and cause obvious turbulence. The appearance of turbulence will increase energy loss, resulting in poor heat dissipation of the final battery pack.

[0030] Based on this, the present disclosure provides a battery pack, such as Figure 1 As shown, the battery pack 100 includes: a box body 10 , a battery cell module 20 and a fan 30 .

[0031] The battery cell module 20 is disposed in the box body 10 , and the box body 10 can be used to fix the battery cell module 20 to prevent it from shaking during use, thereby preventing the working stability of the battery cell module 20 from being affected.

[0032] The fan 30 is fixed on the box body 10 , and the air outlet direction of the fan 30 is toward the battery module 20 , so that the relative position relationship between the fan 30 and the battery module 20 remains stable, thereby achieving continuous and stable heat dissipation of the battery module 20 by the fan 30 .

[0033] like Figure 2 and Figure 3 As shown, the battery cell module 20 includes a plurality of battery cell rows 21 arranged along the air outlet direction X of the fan 30, each battery cell row 21 includes a plurality of battery cells 201, and an angle α is formed between the arrangement direction Y of the plurality of battery cells 201 and the air outlet direction X of the fan 30, and the angle α is greater than 0 and less than 90°.

[0034] In this way, the air outlet direction X of the fan 30 is not perpendicular to the battery cell row 21. When the cold air of the fan 30 blows toward the surface of the battery cell row 21 closest to the fan (for the convenience of description, the battery cell row 21 closest to the fan is referred to as the adjacent battery cell row 21 below), the distances between the battery cells 201 in the adjacent battery cell row 21 and the fan 30 are not equal, and the surface of the adjacent battery cell row 21 can be regarded as an inclined surface, and the inclined surface can guide the cold air to flow in the inclined direction of the inclined surface (such as Figure 1As shown, the slope can guide the cold air to flow in the direction indicated by the dotted arrow in the figure), thereby alleviating the obvious turbulence and turbulence phenomenon that occurs when the cold air blows toward the surface of the adjacent battery cell row 21, thereby reducing the energy loss of the cold air and improving the heat dissipation effect of the battery pack.

[0035] In some examples, the multiple battery cells 201 in each group of battery cell rows 21 may be arranged at intervals, so that some cold air can enter the gaps between the battery cells 201 , thereby improving the heat dissipation effect on the battery cells 201 .

[0036] like Figure 2 As shown, the arrangement direction Y of the plurality of battery cells 201 may be perpendicular to the length direction Z of the battery cells 201 . Exemplarily, the air outlet direction X of the fan 30 may also be perpendicular to the length direction Z of the battery cells 201 .

[0037] Figure 2 and Figure 3 The cell row 21 includes four cells 201 for illustration, but the number of cells 201 is not limited, and the number of cells 201 in each cell row 21 can be set according to actual needs. In addition, the number of cell rows 21 included in the cell module 20 can also be flexibly adjusted according to actual needs.

[0038] In some examples, when the angle α is greater than 0 and less than 90°, the angle α may be 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80°, etc. Compared with the case where the angle α is 90°, when the angle α is any angle between 0 and 90°, the turbulence phenomenon can be better improved, and ultimately the heat dissipation effect of the battery pack can be improved.

[0039] In some embodiments, the angle α is greater than or equal to 45° and less than or equal to 75°. When the angle α is within this angle range, it can ensure that the distance between the fan 30 and each battery cell 201 in the adjacent battery cell row 21 (i.e., the battery cell row 21 closest to the fan 30) is relatively reasonable, so that the air outlet of the fan 30 can reach the surface of each battery cell 201 in the adjacent battery cell row 21 in a timely and effective manner to effectively dissipate heat for each battery cell 201. On the other hand, by setting the angle α within this angle range, the positions of all battery cells 201 in the battery cell module 20 are arranged relatively compactly, which is conducive to improving the space utilization of the battery cell module 20 and avoiding the problem of the battery cell module 20 having a large size in a certain direction and causing the overall center of gravity to be unstable.

[0040] Exemplarily, the angle α may be 45°, 50°, 55°, 60°, 65°, 70°, 75°, etc.

[0041] In some embodiments, the angle α is equal to 60°. With this arrangement, the distance between the fan 30 and each battery cell 201 in the adjacent battery cell row 21 is reasonable, so that the air outlet of the fan 30 can reach the surface of each battery cell 201 in the adjacent battery cell row 21 in a timely and effective manner, so as to effectively dissipate heat for each battery cell 201; at the same time, the positions of all the battery cells 201 in the battery cell module 20 are arranged compactly, which can avoid the battery cell module 20 being too long in the arrangement direction of multiple groups of battery cell rows 21, which makes it difficult for cold air to reach the battery cell row 21 far away from the fan 30, so that the fan 30 can achieve a good heat dissipation effect for all battery cell rows 21.

[0042] In some embodiments, Figure 1 As shown, the box 10 has a side wall 11, and the battery cells 201 close to the side wall 11 in each battery cell row 21 form a battery cell row, that is, the extension direction of the battery cell row is the same as the arrangement direction of multiple groups of battery cell rows 21. The angle between the battery cell row and the battery cell row 21 close to the fan 30 (that is, the adjacent battery cell row 21) is an obtuse angle. Exemplarily, the angle between the battery cell row and the adjacent battery cell row 21 can be complementary to the above-mentioned angle α. In this way, when the cold air blown out by the fan 30 is guided by the adjacent battery cell row 21, it can be blown in the direction of the battery cell row.

[0043] The cell row and the side wall 11 are spaced apart and define a heat dissipation channel 301 together. With this arrangement, the cold air directed by the adjacent cell row 21 can be directed into the heat dissipation channel 301, thereby effectively dissipating the heat of each cell 201 in the cell row. In addition, the formation of the heat dissipation channel 301 is also conducive to the stable flow of the cold air, thereby avoiding its divergent flow causing large energy loss, thereby affecting the heat dissipation effect of the cell module 20.

[0044] In addition, when the angle α is 60°, the spacing between the battery cell row and the side wall 11 is reasonable, which can avoid the heat dissipation channel 301 being too wide to cause slow wind flow, and avoid the heat dissipation channel 301 being too narrow to affect the installation of the battery cell module 20.

[0045] In some examples, the side wall 11 may be arranged parallel to the battery cell array, which helps to ensure that the cold air flows smoothly in the heat dissipation channel 301 .

[0046] In some embodiments, Figures 2 to 4 As shown, the battery cell module 20 further includes a battery cell bracket 22 , and the battery cell bracket 22 is provided with a plurality of mounting holes 221 for mounting the battery cells 201 , and each mounting hole 221 corresponds to a battery cell 201 .

[0047] In some examples, the mounting holes 221 on the cell holder 22 can be arranged according to the arrangement of the cells 201 in the cell module 20. For example, the cell holder 22 can include multiple mounting hole groups, each mounting hole group corresponds to a cell row 21; and the arrangement direction and number of the mounting holes 221 in each mounting hole group are respectively the same as the arrangement direction and number of the cells 201 in the cell row 21. In this way, the cell holder 22 can be used to well limit and fix all the cells 201, so that the cells 201 in the cell module 20 can maintain a stable relative position relationship with the fan 30, thereby facilitating the heat dissipation effect of the cell module 20.

[0048] In some embodiments, Figure 3 and Figure 4 As shown, the cell support 22 includes an inclined surface 220 close to the fan 30 , and the extending direction of the inclined surface 220 is consistent with the arrangement direction Y of the multiple cells 201 (eg, the arrangement direction of the multiple cells 201 in the adjacent cell row 21 ).

[0049] In this configuration, the cold air blown by the fan 30 to the side of the battery holder 22 can be guided by the inclined surface 220, so that part of the cold air flows into the heat dissipation channel 301 along the inclined surface 220, thereby further improving the heat dissipation effect on the battery module 20. In addition, since the extension direction of the inclined surface 220 is consistent with the arrangement direction Y of the multiple battery cells 201, it is beneficial to make part of the cold air blown by the fan 30 to the adjacent battery cell row 21 and the other part of the cold air blown to the inclined surface 220 be guided in the same direction and flow into the heat dissipation channel 301, thereby helping to avoid the situation where the cold air is turbulent when the guiding directions are different.

[0050] In some embodiments, Figure 2 and Figure 3 As shown, there are two groups of cell holders 22, and the two groups of cell holders 22 are arranged on both sides of the cell module. For example, two groups of cell holders 22 are arranged at opposite ends of each cell 201. Since each group of cell holders 22 has mounting holes 221, the cell 201 can be fixed from both ends of the cell 201, which is conducive to ensuring the stability of all the cells 201.

[0051] The cell module 20 further includes a bracket connector 23, and the two ends of the bracket connector 23 are respectively connected to a group of cell brackets 22. In this way, the bracket connector 23 can be used to fix the two cell brackets 22, thereby ensuring the stability between the cell bracket 22 and the cell 201.

[0052] In some examples, the support connector 23 is detachably connected to at least one battery cell support 22 .

[0053] Exemplarily, one end of the bracket connector 23 may be provided with a thread, and the corresponding battery holder 22 is provided with an opening for the bracket connector 23 to pass through. After the bracket connector 23 passes through the opening, a nut may be used to fix the bracket connector 23 to the battery holder 22. Of course, when the bracket connector 23 and the two battery holders 22 are both detachably connected, both ends of the bracket connector 23 may be provided with threads, and the connection method thereof may refer to the above description, which will not be repeated here.

[0054] As another example, the battery holder 22 and the bracket connector 23 can be fixed by snap-fitting. For example, a tube clamp can be provided on the battery holder 22, and a limiting protrusion is provided at the end of the bracket connector 23; the bracket connector 23 is inserted into the tube clamp, and the tube clamp can limit the radial movement of the bracket connector 23, and the limiting protrusion can limit the axial movement of the bracket connector 23, so that the battery holder 22 and the bracket connector 23 can be fixed. Of course, when the bracket connector 23 and the two battery holders 22 can be detachably connected, the structure and connection method of the bracket connector 23 and the other battery holder 22 can refer to the above description, and no further explanation is given here.

[0055] In some embodiments, Figure 1 and Figure 4 As shown, the cell holder 22 is provided with a connection portion 223, and the connection portion 223 is used to connect with the box body 10. Exemplarily, the connection portion 223 is provided with an opening, and the cell holder 22 can be fixed to the box body 10 by a bolt passing through the opening, thereby fixing the position of the cell module 20.

[0056] In some embodiments, Figures 2 to 4 As shown, a slot 222 is provided on the battery cell holder 22 ; the battery cell module 20 further includes a bus bar 24 , which is disposed in the slot 222 and is electrically connected to each battery cell 201 .

[0057] With this arrangement, the slot 222 of the cell holder 22 can well limit and fix the busbar 24, which helps to connect the busbar 24 with the cell 201. Exemplarily, the busbar 24 can be welded to the cell 201. For example, the busbar 24 and the cell 201 can be connected by laser welding.

[0058] In some examples, the busbar 24 may be made of a copper-nickel composite busbar, which helps to improve the connection stability between the busbar 24 and the battery cell 201 and the current transmission stability.

[0059] In some examples, when the positive and negative electrodes of the battery cell 201 are located at opposite ends thereof, a slot 222 may be provided on each of the two battery cell holders 22, and two bus bars 24 may be provided and respectively located in the two slots. In this way, the positive and negative electrodes of the battery cell 201 are connected by using the bus bars 24 at both ends, so that the battery cells 201 can be connected in series and / or in parallel, thereby realizing the output of power supply.

[0060] In some embodiments, Figures 2 to 4 As shown, the battery cell module further includes a circuit board 25 and a temperature detection element 251 electrically connected to the circuit board 25 , and the temperature detection element 251 is used to detect the temperature of the battery cell 201 adjacent thereto.

[0061] Exemplarily, the temperature detection element 251 can be directly welded on the circuit board 25 , which can save the use of wiring harnesses and improve the space utilization of the battery module 20 .

[0062] In some examples, the temperature detection element 251 may be a PTC thermistor or an NTC thermistor.

[0063] In other examples, the temperature detection element 251 may use a temperature sensing chip, which has high accuracy and sensitivity. The temperature sensing chip can more accurately sense and measure the temperature changes of the battery cell and provide more reliable temperature data. Temperature sensing chips are usually smaller and more compact, and can be easily integrated into the circuit board 25, which can save space and simplify the design, and is particularly suitable for application scenarios that require high integration and miniaturization. Temperature sensing chips usually have more safety protection functions, and can detect overheating in time and take corresponding measures, such as issuing warning signals or triggering the system's protection mechanism, which helps prevent battery cell overheating, overload and other potential dangerous situations.

[0064] In some examples, the circuit board 25 can be fixedly connected to the battery cell support 22 , so that the overall structural stability of the battery cell module 20 is good.

[0065] Some embodiments of the present disclosure also provide an electrical device, such as Figure 5 As shown, the electric device 200 includes the battery pack 100 as described in any of the above embodiments.

[0066] The electrical device 200 can be any device that needs to use electrical energy, such as cars, ships, airplanes, drones, spacecraft, electric toys, electric tools, laptops, tablet computers, mobile phones and other portable devices. Among them, the car can be a fuel car, a gas car or a new energy car, and the new energy car can be a pure electric car, a hybrid car or an extended-range car; the spacecraft includes rockets, space shuttles and spacecrafts, etc.; the electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc.; the electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc. The embodiments of the present disclosure do not impose special restrictions on the above-mentioned electrical devices 200.

[0067] Since the electrical device 200 includes the above-mentioned battery pack 100, it has all the technical effects of the battery pack 100, which will not be described in detail here.

[0068] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for technicians in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A battery pack, characterized in that: include: Box; A battery cell module is disposed in the box; and A fan is fixed on the box body, and the air outlet direction of the fan is toward the battery module; Among them, the battery cell module includes multiple groups of battery cell rows arranged along the air outlet direction of the fan, each group of battery cell rows includes multiple battery cells, and there is an angle between the arrangement direction of the multiple battery cells and the air outlet direction of the fan, and the angle is greater than 0 and less than 90°.

2. The battery pack according to claim 1, characterized in that: The angle is greater than or equal to 45° and less than or equal to 75°.

3. The battery pack according to claim 1, characterized in that: The angle is equal to 60°.

4. The battery pack according to any one of claims 1 to 3, characterized in that: The battery cell module also includes a battery cell bracket, and the battery cell bracket is provided with a plurality of mounting holes for mounting the battery cells, and each mounting hole corresponds to a battery cell.

5. The battery pack according to claim 4, characterized in that: The battery cell support includes an inclined surface close to the fan, and an extending direction of the inclined surface is consistent with an arrangement direction of the plurality of battery cells.

6. The battery pack according to claim 4, characterized in that: The battery cell bracket is provided with a card slot; the battery cell module also includes a bus bar, which is arranged in the card slot and is electrically connected to each battery cell.

7. The battery pack according to claim 4, characterized in that: The battery cell brackets are provided with two groups, and the two groups of battery cell brackets are arranged on both sides of the battery cell module; the battery cell module also includes a bracket connector, and the two ends of the bracket connector are respectively connected to a group of battery cell brackets.

8. The battery pack according to any one of claims 1 to 3, characterized in that: The battery cell module further includes a circuit board and a temperature detection element electrically connected to the circuit board, wherein the temperature detection element is used to detect the temperature of the battery cell adjacent thereto.

9. The battery pack according to any one of claims 1 to 3, characterized in that: The box body has a side wall, and the cells in each cell row close to the side wall form a cell column. The angle between the cell column and the cell row close to the fan is an obtuse angle. The cell column and the side wall are spaced apart and jointly define a heat dissipation channel.

10. An electrical device, characterized in that: A battery pack comprising the battery pack as claimed in any one of claims 1 to 9.

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