Battery pack and new energy automobile

Abstract

The embodiment of the utility model provides a battery pack and a new energy automobile, and relates to the technical field of power batteries. The battery pack comprises a battery shell, a busbar, a first heating piece, a second heating piece and a plurality of battery cells, the plurality of battery cells are arranged in the battery shell, and the busbar is arranged on the sides, away from the battery shell, of the plurality of battery cells; the first heating element is arranged on one side, far away from the plurality of battery cells, of the busbar, and the second heating element is arranged between the plurality of battery cells and the battery shell. The battery pack is simple in structure and high in integration level, the production cost can be reduced, the energy density can be improved, and the heating efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, and more particularly, to a battery pack and a new energy vehicle. Background Art

[0002] In some specific environments such as low temperature, the battery cells inside the battery pack need to be heated. The existing low-temperature thermal management methods for battery packs usually adopt methods such as liquid heating, heating film heating or heating wire heating.

[0003] However, the methods of using liquid heating or heating film heating have relatively high production costs. Using heating wires requires separate additional structural parts for fixation, which also has the problem of high production costs, and will lead to a complex structure of the battery pack and a low energy density. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a battery pack and a new energy vehicle, which have a simple structure, high integration, can reduce production costs, improve energy density, and enhance heating efficiency.

[0005] The embodiments of the utility model are implemented as follows:

[0006] In a first aspect, the utility model provides a battery pack, comprising:

[0007] A battery housing;

[0008] A plurality of battery cells, the plurality of battery cells being disposed in the battery housing;

[0009] A bus bar, the bus bar being disposed on a side of the plurality of battery cells away from the battery housing;

[0010] A first heating element, the first heating element being disposed on a side of the bus bar away from the plurality of battery cells; and

[0011] A second heating element, the second heating element being disposed between the plurality of battery cells and the battery housing.

[0012] In an alternative embodiment, the bus bar is provided with a first mounting groove, and the first heating element is disposed in the first mounting groove.

[0013] In an alternative embodiment, the bus bar includes a plurality of first pole pieces, a plurality of second pole pieces, a plurality of third pole pieces, and a plurality of fourth pole pieces, and the first mounting groove includes a first receiving groove, a second receiving groove, a third receiving groove, and a fourth receiving groove;

[0014] Each of the multiple first electrode plates is provided with the first receiving groove, each of the multiple second electrode plates is provided with the second receiving groove, each of the multiple third electrode plates is provided with the third receiving groove, and each of the multiple fourth electrode plates is provided with the fourth receiving groove; the first heating element is simultaneously disposed in the first receiving groove, the second receiving groove, the third receiving groove, and the fourth receiving groove.

[0015] In an alternative embodiment, the battery pack further includes a support member disposed on the battery housing, and the second heating element is disposed on the support member and located between the support member and the multiple battery cells.

[0016] In an alternative embodiment, the support member defines a second mounting groove, the second heating element is disposed in the second mounting groove, and the bottoms of the multiple battery cells are disposed on the support member and in contact with the second heating element.

[0017] In an alternative embodiment, the second mounting groove is a U-shaped groove, and the second heating element is a U-shaped heating element.

[0018] In an alternative embodiment, the U-shaped groove includes a first straight groove, an arc-shaped groove, and a second straight groove that are sequentially connected. One end of the first straight groove and the second straight groove remote from the arc-shaped groove respectively have a first enlarged groove and a second enlarged groove.

[0019] In an alternative embodiment, the number of the support members and the second heating elements are both multiple. The multiple support members are spaced apart on the battery housing, and the multiple battery cells are disposed on one side of the multiple support members remote from the battery housing; the multiple second heating elements are disposed in one-to-one correspondence with the multiple support members.

[0020] In an alternative embodiment, a part of the support member protrudes toward the multiple battery cells to form a support protrusion. The multiple battery cells are disposed on the support protrusion, and the second heating element is disposed on the support protrusion and located between the support protrusion and the multiple battery cells.

[0021] In a second aspect, the present utility model provides a new energy vehicle including the battery pack according to any one of the foregoing embodiments.

[0022] The beneficial effects of the embodiments of the present utility model include:

[0023] The battery pack includes a battery housing, a busbar, a first heating element, a second heating element, and a plurality of battery cells. The plurality of battery cells are disposed in the battery housing, and the busbar is disposed on a side of the plurality of battery cells away from the battery housing; the first heating element is disposed on a side of the busbar away from the plurality of battery cells, and the second heating element is disposed between the plurality of battery cells and the battery housing. It is easy to understand that when the battery pack is placed conventionally, the first heating element and the second heating element can respectively heat the top and bottom of the battery cells; that is, the first heating element can heat the top of the battery cells through the busbar, and the second heating element can directly contact and heat the bottom of the battery cells. There is no need to add a separate structural member for fixation, so that the structure of the battery pack is simple, the integration degree is high, and the energy density can be improved; at the same time, compared with the liquid heating and heating film heating methods, the production cost is reduced, and the heating efficiency can be improved by heating with the first heating element and the second heating element at the same time.

[0024] The new energy vehicle includes the battery pack and has all the beneficial effects of the battery pack. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a schematic structural diagram of the new energy vehicle provided by the embodiment of the present invention;

[0027] Figure 2 It is a schematic structural diagram of the battery pack provided by the embodiment of the present invention;

[0028] Figure 3 It is an exploded view of the battery pack provided by the embodiment of the present invention;

[0029] Figure 4 It is an assembly schematic diagram of the first heating element and the busbar provided by the embodiment of the present invention;

[0030] Figure 5 It is a schematic structural diagram of the first heating element provided by the embodiment of the present invention;

[0031] Figure 6 It is a schematic structural diagram of the first pole piece, the second pole piece, the third pole piece, and the fourth pole piece provided by the embodiment of the present invention;

[0032] Figure 7 It is an assembly schematic diagram of the second heating element and the support member provided by the embodiment of the present invention;

[0033] Figure 8 is Figure 7 The partial enlarged view of position A in

[0034] Icon: 1000 - New energy vehicle; 100 - Battery pack; 10 - Battery housing; 20 - Battery cell; 30 - Bus bar; 31 - First installation groove; 311 - First receiving groove; 312 - Second receiving groove; 313 - Third receiving groove; 314 - Fourth receiving groove; 32 - First pole piece; 33 - Second pole piece; 34 - Third pole piece; 35 - Fourth pole piece; 40 - First heating element; 50 - Second heating element; 60 - Support member; 61 - Second installation groove; 611 - First straight groove; 6111 - First enlarged groove; 612 - Arc groove; 613 - Second straight groove; 6131 - Second enlarged groove; 62 - Support protrusion; 200 - Vehicle body. Specific embodiments

[0035] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. The components of the embodiments of the present utility model described and illustrated herein generally may be arranged and designed in a variety of different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed present utility model, but is merely representative of selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without any creative efforts shall fall within the scope of protection of the present utility model.

[0037] It should be noted that: like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not require further definition and explanation in subsequent drawings.

[0038] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0039] In addition, terms such as "horizontal" and "vertical" do not require the components to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0040] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "arranged", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0041] As described in the background art, the existing low-temperature thermal management methods for battery packs usually adopt liquid heating, heating film heating, or heating wire heating methods. However, for the methods of liquid heating or heating film heating, the production cost is relatively high, and when using heating wires, separate structural parts need to be added for fixation, which also has the problem of high production cost, and will lead to a complex structure of the battery pack and a low energy density.

[0042] Based on this, please refer to Figures 1-8 , embodiments of the present invention provide a battery pack 100 and a new energy vehicle 1000, which can effectively improve the above-mentioned technical problems, that is, they have a simple structure, high integration, can reduce production costs, improve energy density, and enhance heating efficiency. The battery pack 100 and the new energy vehicle 1000 will be described in detail below.

[0043] Please refer to Figure 1 , Figure 1 is a schematic structural diagram of the new energy vehicle 1000 provided in this embodiment. Combining Figure 1 , the new energy vehicle 1000 includes a battery pack 100 and a vehicle body 200. The battery pack 100 is installed on the vehicle body 200. The battery pack 100 serves as an energy source to provide electrical energy for the vehicle body 200 to realize various functions of the vehicle body 200.

[0044] Furthermore, please refer to Figure 2 and Figure 3 , Figure 2 is a schematic structural diagram of the battery pack 100 provided in this embodiment, Figure 3 is an exploded view of the battery pack 100 provided in this embodiment. Combining Figure 2 and Figure 3, the battery pack 100 includes a battery housing 10, a bus bar 30, a first heating element 40, a second heating element 50, and a plurality of battery cells 20. The plurality of battery cells 20 are disposed in the battery housing 10, and the bus bar 30 is disposed on a side of the plurality of battery cells 20 away from the battery housing 10; the first heating element 40 is disposed on a side of the bus bar 30 away from the plurality of battery cells 20, and the second heating element 50 is disposed between the plurality of battery cells 20 and the battery housing 10.

[0045] It is easy to understand that when the battery pack 100 is placed conventionally, the first heating element 40 and the second heating element 50 can respectively heat the top and bottom of the battery cells 20; that is, the first heating element 40 can heat the top of the battery cells 20 through the bus bar 30, and the second heating element 50 can directly contact and heat the bottom of the battery cells 20. In this way, there is no need to add a separate structural member to fix the heating element, making the structure of the battery pack 100 simple and highly integrated, which can improve the energy density; at the same time, compared with the liquid heating and heating film heating methods, the production cost is reduced. By heating with the first heating element 40 and the second heating element 50 simultaneously, the heating efficiency can also be improved.

[0046] It should be noted that in this embodiment, both the first heating element 40 and the second heating element 50 are heating wires. Of course, in other embodiments, the first heating element 40 and the second heating element 50 can also be heating strips or heating wires, etc.

[0047] For better installation of the first heating element 40, please refer to Figure 4 and Figure 5 , Figure 4 is an assembly schematic diagram of the first heating element 40 and the bus bar 30 provided in this embodiment, Figure 5 is a structural schematic diagram of the first heating element 40 provided in this embodiment. Combining Figure 4 and Figure 5 , the bus bar 30 is provided with a first installation groove 31, and the first heating element 40 is disposed in the first installation groove 31.

[0048] It should be noted that the bus bar 30 includes a plurality of different pole pieces, and can realize the series or parallel connection of a plurality of battery cells 20 according to the specific design requirements of the battery pack 100. That is to say, the specific arrangement of different pole pieces needs to be determined according to the actual arrangement of the plurality of battery cells 20 and the energy transmission design requirements of the battery pack 100.

[0049] Specifically, in this embodiment, the bus bar 30 includes a plurality of first pole pieces 32, a plurality of second pole pieces 33, a plurality of third pole pieces 34, and a plurality of fourth pole pieces 35. According to the different positions of the plurality of battery cells 20, different pole pieces are correspondingly arranged to meet the series or parallel connection requirements in specific situations.

[0050] Correspondingly, the first installation groove 31 is also provided with different accommodation grooves for installing and accommodating the first heating element 40. Specifically, please refer to Figure 6 , Figure 6 which is a schematic structural diagram of the first pole piece 32, the second pole piece 33, the third pole piece 34 and the fourth pole piece 35 provided in this embodiment. Combining Figure 5 and Figure 6 , the first installation groove 31 includes a first accommodation groove 311, a second accommodation groove 312, a third accommodation groove 313 and a fourth accommodation groove 314; each of the plurality of first pole pieces 32 is provided with the first accommodation groove 311, each of the plurality of second pole pieces 33 is provided with the second accommodation groove 312, each of the plurality of third pole pieces 34 is provided with the third accommodation groove 313, and each of the plurality of fourth pole pieces 35 is provided with the fourth accommodation groove 314; the first heating element 40 is simultaneously arranged in the first accommodation groove 311, the second accommodation groove 312, the third accommodation groove 313 and the fourth accommodation groove 314.

[0051] As Figure 4 shown, it should be noted that in this embodiment, a single first heating element 40 can be simultaneously arranged in different accommodation grooves opened on different pole pieces. By setting the horizontal, vertical and bending arrangement paths of the first heating element 40 on different pole pieces, heating of all pole pieces can be achieved simultaneously, so that all the battery cells 20 can be heated. Moreover, using a single heating element can also facilitate the connection of external heating devices and further save costs.

[0052] Of course, in some other embodiments, multiple first heating elements 40 can also be provided to heat different pole pieces at different positions according to actual heating requirements. Of course, external heating devices can also be connected to multiple heating elements simultaneously to heat multiple battery cells 20 at the same time.

[0053] In addition, as Figure 6 shown, it should also be noted that since the arranged and extended routing path of the first heating element 40 has a bent setting, in this embodiment, the shape of the first accommodation groove 311 is linear to achieve linear arrangement; the shape of the second accommodation groove 312 is similar to an "L shape" to achieve bent wiring; the shape of the third accommodation groove 313 is also similar to an "L shape" and there are two of them, which can achieve two-time bent wiring of the heating element; the shape of the fourth accommodation groove 314 is similar to a "U shape" and can achieve U-shaped turning wiring.

[0054] Please continue to combine Figure 2 and Figure 3 , in order to better support the battery cells 20, in this embodiment, the battery pack 100 further includes a support member 60. The support member 60 is arranged on the battery housing 10, and the second heating element 50 is arranged on the support member 60 and is located between the support member 60 and the plurality of battery cells 20.

[0055] Further, for better installation of the second heating element 50, please refer to Figure 7 , Figure 7 which is an assembly schematic diagram of the second heating element 50 and the support member 60 provided in this embodiment. Combining Figure 2 and Figure 7 , the support member 60 is provided with a second installation groove 61, the second heating element 50 is disposed in the second installation groove 61, and the bottoms of the plurality of battery cells 20 are disposed on the support member 60 and are in contact with the second heating element 50. In this way, the second heating element 50 is disposed in the second installation groove 61, which can increase the contact area between the battery cells 20 and the support member 60, and further improve the installation stability of the battery cells 20.

[0056] It should be noted that the second installation groove 61 in this embodiment is a U-shaped groove, and the second heating element 50 is a U-shaped heating element. Through the U-shaped setting, the contact area between the heating element and the battery cells 20 can be increased, and the heating efficiency can be further improved. Of course, in other embodiments, the shapes of the second installation groove 61 and the second heating element 50 can also be "I-shaped", "V-shaped", "S-shaped" or "C-shaped", etc.

[0057] Further, please refer to Figure 8 , Figure 8 which is Figure 7 a partial enlarged view of the position A in Figure 7 and Figure 8 . Combining

[0058] , the U-shaped groove includes a first straight groove 611, an arc groove 612, and a second straight groove 613 that are sequentially connected. The ends of the first straight groove 611 and the second straight groove 613 away from the arc groove 612 respectively have a first enlarged groove 6111 and a second enlarged groove 6131. It can be understood that both ends of the U-shaped heating element can be heated by connecting to an external heating device, and the settings of the first enlarged groove 6111 and the second enlarged groove 6131 can facilitate the connection of both ends of the U-shaped heating element to the wires of the external heating device, that is, provide a larger connection and installation space. Figure 8 As shown in

[0059] , in order to provide installation guidance for the battery cells 20 and better support the battery cells 20, a part of the support member 60 protrudes toward the direction of the plurality of battery cells 20 to form a support protrusion 62. The plurality of battery cells 20 are disposed on the support protrusion 62, and the second heating element 50 is disposed on the support protrusion 62 and is located between the support protrusion 62 and the plurality of battery cells 20. As shown in Figure 2 and Figure 3, in order to further improve the heating efficiency, the number of the support members 60 and the second heating members 50 is multiple. The multiple support members 60 are arranged at intervals on the battery housing 10, and the multiple battery cells 20 are arranged on one side of the multiple support members 60 away from the battery housing 10; the multiple second heating members 50 are arranged in one-to-one correspondence with the multiple support members 60.

[0060] As Figure 3 shown, it should be noted that the multiple battery cells 20 provided in this embodiment are arranged in a rectangular array, which can also be understood as having multiple horizontally arranged battery groups. Each battery group has multiple vertically arranged battery cells 20. That is to say, at least one support member 60 is provided to support the bottom of each battery group, and at least one second heating member 50 can perform heating.

[0061] In summary, the embodiment of the present invention provides a battery pack 100 and a new energy vehicle 1000. The battery pack 100 includes a battery housing 10, a bus bar 30, a first heating member 40, a second heating member 50, and multiple battery cells 20. The multiple battery cells 20 are arranged on the battery housing 10, and the bus bar 30 is arranged on one side of the multiple battery cells 20 away from the battery housing 10; the first heating member 40 is arranged on one side of the bus bar 30 away from the multiple battery cells 20, and the second heating member 50 is arranged between the multiple battery cells 20 and the battery housing 10. It is easy to understand that when the battery pack 100 is placed conventionally, the first heating member 40 and the second heating member 50 can respectively heat the top and bottom of the battery cell 20; that is, the first heating member 40 can heat the top of the battery cell 20 through the bus bar 30, and the second heating member 50 can directly contact and heat the bottom of the battery cell 20. There is no need to add a separate structural member for fixation, so that the structure of the battery pack 100 is simple and the integration degree is high, which can improve the energy density; at the same time, compared with the liquid heating and heating film heating methods, the production cost is reduced. By heating the first heating member 40 and the second heating member 50 at the same time, the heating efficiency can also be improved.

[0062] The new energy vehicle 1000 includes the battery pack 100, which has all the functions and beneficial effects of the battery pack 100.

[0063] The above are only specific embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A battery pack, characterized in that, Comprising: A battery housing (10); A plurality of battery cells (20), the plurality of battery cells (20) being disposed in the battery housing (10); A bus bar (30), the bus bar (30) being disposed on a side of the plurality of battery cells (20) away from the battery housing (10); A first heating element (40), the first heating element (40) being disposed on a side of the bus bar (30) away from the plurality of battery cells (20); And A second heating element (50), the second heating element (50) being disposed between the plurality of battery cells (20) and the battery housing (10).

2. The battery pack according to claim 1, wherein The bus bar (30) is provided with a first mounting groove (31), and the first heating element (40) is disposed in the first mounting groove (31).

3. The battery pack according to claim 2, wherein, The bus bar (30) includes a plurality of first pole pieces (32), a plurality of second pole pieces (33), a plurality of third pole pieces (34), and a plurality of fourth pole pieces (35), and the first mounting groove (31) includes a first receiving groove (311), a second receiving groove (312), a third receiving groove (313), and a fourth receiving groove (314); Each of the plurality of first pole pieces (32) is provided with the first receiving groove (311), each of the plurality of second pole pieces (33) is provided with the second receiving groove (312), each of the plurality of third pole pieces (34) is provided with the third receiving groove (313), and each of the plurality of fourth pole pieces (35) is provided with the fourth receiving groove (314); the first heating element (40) is simultaneously disposed in the first receiving groove (311), the second receiving groove (312), the third receiving groove (313), and the fourth receiving groove (314).

4. The battery pack according to claim 1, wherein The battery pack (100) further includes a support member (60), the support member (60) being disposed on the battery housing (10), the second heating element (50) being disposed on the support member (60) and located between the support member (60) and the plurality of battery cells (20).

5. The battery pack according to claim 4, characterized in that, The support member (60) is provided with a second mounting groove (61), the second heating element (50) is disposed in the second mounting groove (61), and the bottoms of the plurality of battery cells (20) are disposed on the support member (60) and in contact with the second heating element (50).

6. The battery pack according to claim 5, wherein The second mounting groove (61) is a U-shaped groove, and the second heating element (50) is a U-shaped heating element.

7. The battery pack according to claim 6, wherein The U-shaped groove includes a first straight groove (611), an arc-shaped groove (612), and a second straight groove (613) that are sequentially connected, and one ends of the first straight groove (611) and the second straight groove (613) away from the arc-shaped groove (612) respectively have a first enlarged groove (6111) and a second enlarged groove (6131).

8. The battery pack according to claim 4, wherein, The number of the support members (60) and the second heating elements (50) is plural, the plural support members (60) are spaced apart and disposed on the battery housing (10), and the plural battery cells (20) are disposed on a side of the plural support members (60) away from the battery housing (10); the plural second heating elements (50) are disposed in one-to-one correspondence with the plural support members (60).

9. The battery pack according to claim 4, characterized in that, A part of the support member (60) protrudes towards the direction of the plurality of battery cells (20) to form a support protrusion (62), the plurality of battery cells (20) are disposed on the support protrusion (62), the second heating member (50) is disposed on the support protrusion (62) and is located between the support protrusion (62) and the plurality of battery cells (20).

10. A new energy vehicle, characterized in that, Comprising the battery pack (100) according to any one of claims 1-9.

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