Power battery system and vehicle having the same
By adopting a thermoelectric integrated device in the power battery system, the thermoelectric module absorbs the heat generated by the conductive copper discharge, the problem of poor integration of the power battery thermal management device is solved, and more efficient thermal management and safety is achieved.
Patent Information
- Application Number
- CN202420944629.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-04-30
AI Technical Summary
In the prior art, the integration of the thermal management device of the power battery induces thermal runaway and insulation damage of conductive connections.
A power battery system is designed, using a thermoelectric integrated device, including a thermoelectric module and a conductive copper strip. By setting the thermoelectric module between and on both sides of the conductive copper strip, the heat generated by the conductive copper strip is absorbed to achieve thermal management.
It effectively avoids the insulation damage of conductive copper discharge when thermal runaway, improves the heat dissipation efficiency of the battery cell, and enhances the overall safety and stability of the power battery system.
Smart Images
Figure CN222705688U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vehicles, and in particular to a power battery system and a vehicle having the same. Background Art
[0002] Charging convenience and charging time have become the most important indicators of vehicle performance and user perception for new energy vehicles. Power battery safety and electric vehicle energy consumption are also factors consumers consider when purchasing a vehicle. However, as power batteries age, the consistency of their internal conductive connections becomes increasingly apparent. With the increasing popularity of four-wheel drive systems, high-voltage safety requirements for the conductive connections within power batteries are becoming increasingly stringent. Furthermore, with the increasing use of high-power charging and power system power, the current-carrying capacity requirements for the conductive connections are becoming increasingly demanding. Limited by the integration density of power battery packs, the cross-sectional area of the conductive connections cannot be increased indefinitely, resulting in a continuous increase in heat generation. As power batteries become increasingly integrated with the vehicle body, the power battery structure becomes a critical component of the vehicle's collision path. During a collision, the power battery can potentially cause thermal runaway, short-circuiting the conductive connections and increasing vehicle risk. Currently, thermoelectric materials are being used to recover heat generated during power battery operation, thereby achieving thermal management for the power battery. However, integrated safety and insulation solutions are lacking. Utility Model Content
[0003] The main purpose of the present utility model is to provide a power battery system and a vehicle having the same, so as to solve the problem of poor integration of power battery thermal management devices in the prior art.
[0004] In order to achieve the above-mentioned purpose, according to one aspect of the present utility model, a power battery system is provided, including: a box body, the interior of the box body has an inner cavity; a thermoelectric integrated device, the thermoelectric integrated device is located in the inner cavity, and divides the inner cavity into two battery cell installation cavities along a first direction, each battery cell installation cavity is installed with at least one battery cell, the thermoelectric integrated device also includes a thermoelectric module and two conductive copper bars, the two conductive copper bars are arranged at intervals along the first direction, the two conductive copper bars are arranged in a one-to-one correspondence with the two battery cell installation cavities, and each conductive copper bar is electrically connected to the battery cell in the corresponding battery cell installation cavity; wherein a first interval is formed between the two conductive copper bars, and a second interval is formed between each conductive copper bar and the corresponding battery cell, and at least one of the first interval and the second interval is provided with a thermoelectric module, and the thermoelectric module is used to absorb the heat generated by the conductive copper bar.
[0005] Furthermore, the thermoelectric module includes: a first thermoelectric module, there are two first thermoelectric modules, each of which is arranged in a corresponding second interval; and a second thermoelectric module, which is arranged in the first interval.
[0006] Furthermore, a thermal pad is provided between the first thermoelectric module and the conductive copper busbar close to the first thermoelectric module, and / or a thermal pad is provided between the second thermoelectric module and two conductive copper busbars located on both sides of the second thermoelectric module.
[0007] Furthermore, the first thermoelectric module includes a plurality of first thermoelectric units arranged in sequence along a second direction, the second direction being perpendicular to the first direction; the second thermoelectric module includes a plurality of second thermoelectric units arranged in sequence along the second direction, the arrangement direction of the second thermoelectric units being the same as the arrangement direction of the first thermoelectric units; and the plurality of first thermoelectric units and the plurality of second thermoelectric units are arranged in one-to-one correspondence.
[0008] Furthermore, the thermoelectric integrated device also includes: support beams, there are two support beams, the two support beams are respectively located in the two second intervals, the two support beams are respectively arranged corresponding to the two first thermoelectric modules, the first side of each support beam is in contact with the side of the corresponding first thermoelectric module away from the conductive copper bus, and the second side of each support beam is in contact with the corresponding battery cell, and the support beams are made of insulating material.
[0009] Furthermore, a cooling structure is provided in both support beams, and the cooling structure includes a cooling plate buried in the support beam, and a plurality of cooling water channels connected end to end are provided in the cooling plate, and the plurality of cooling water channels are arranged in a one-to-one correspondence with the plurality of first thermoelectric units, and each cooling water channel is arranged adjacent to the corresponding first thermoelectric unit. The power battery system also includes a liquid supply tank, in which coolant is provided, and the cooling water channels are connected to the liquid supply tank.
[0010] Furthermore, the power battery system also includes a sealing cover, which is connected to both support beams and is used to close the top opening of the first interval and the top opening of the second interval.
[0011] Furthermore, two conductive copper bars are connected in series to form an electrical circuit, one of the two conductive copper bars is a positive electrode, and the other of the two conductive copper bars is a negative electrode. The electrical circuit is used to connect multiple battery cells to the power battery output port.
[0012] Furthermore, the power battery system also includes: a controller, which is used to determine that a cooling water channel fault occurs when an abnormal voltage is detected in the first thermoelectric unit relative to each other in the first direction, and the controller is used to determine that a conductive copper bus fault occurs when an abnormal voltage is detected in multiple first thermoelectric units in the second direction.
[0013] According to another aspect of the present invention, a vehicle is provided, including a power battery system, which is the power battery system described above.
[0014] The technical solution of the present invention is applied, by providing a box with an inner cavity, and providing a thermoelectric integration device and dividing the inner cavity into two battery cell installation cavities along a first direction, each of which is equipped with at least one battery cell, the thermoelectric integration device includes two conductive copper bars and a thermoelectric module, the two conductive copper bars are electrically connected to the corresponding battery cells in the two battery cell installation cavities respectively, a first interval is formed between the two conductive copper bars, and a second interval is formed between the conductive copper bar and the corresponding battery cell, at least one of the first interval and the second interval is provided with a thermoelectric module, the thermoelectric module is used to absorb the heat generated by the conductive copper bar, and the heat generated by the copper bar is recovered by using the thermoelectric module assembly, so that the power battery system can be better integrated, and the insulation damage of the copper bar during thermal runaway can be effectively avoided, and the heat dissipation efficiency of the battery cell can be improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:
[0016] Figure 1 A schematic structural diagram of a first embodiment of a power battery system according to the present utility model is shown;
[0017] Figure 2 FIG2 shows a structural schematic diagram of a second embodiment of a power battery system according to the present utility model;
[0018] Figure 3 A structural schematic diagram of an embodiment of a cooling structure according to the utility model is shown.
[0019] The above drawings include the following reference numerals:
[0020] 10. Box body; 11. Inner cavity;
[0021] 20. Battery cells;
[0022] 30. Cell installation cavity; 31. Thermoelectric module; 32. Conductive copper busbar; 34. First thermoelectric module; 35. Second thermoelectric module; 36. Sealing cover; 37. Support beam;
[0023] 40. Thermal pad;
[0024] 50. Cooling structure. DETAILED DESCRIPTION
[0025] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.
[0027] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application described herein can, for example, be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.
[0028] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in a variety of different forms and should not be interpreted as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of this application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.
[0029] Combine Figures 1 to 3 As shown, according to a specific embodiment of the present application, a power battery system and a vehicle having the same are provided.
[0030] Specifically, a power battery system includes: a box body 10, the interior of the box body 10 has an inner cavity 11; a thermoelectric integrated device, the thermoelectric integrated device is located in the inner cavity 11, and the inner cavity 11 is divided into two battery cell installation cavities 30 along a first direction, each battery cell installation cavity 30 is installed with at least one battery cell 20, the thermoelectric integrated device also includes a thermoelectric module 31 and two conductive copper bars 32, the two conductive copper bars 32 are arranged at intervals along the first direction, the two conductive copper bars 32 are arranged in a one-to-one correspondence with the two battery cell installation cavities 30, and each conductive copper bar 32 is electrically connected to the battery cell 20 in the corresponding battery cell installation cavity 30; wherein, a first interval is formed between the two conductive copper bars 32, and a second interval is formed between each conductive copper bar 32 and the corresponding battery cell 20, and at least one of the first interval and the second interval is provided with a thermoelectric module 31, and the thermoelectric module 31 is used to absorb the heat generated by the conductive copper bar 32.
[0031] In this embodiment, a box with an inner cavity is provided, and a thermoelectric integration device is provided, and the inner cavity is divided into two battery cell installation cavities along a first direction, at least one battery cell is installed in each battery cell installation cavity, and the thermoelectric integration device includes two conductive copper bars and a thermoelectric module, the two conductive copper bars are electrically connected to the corresponding battery cells in the two battery cell installation cavities respectively, a first interval is formed between the two conductive copper bars, and a second interval is formed between the conductive copper bar and the corresponding battery cell, at least one of the first interval and the second interval is provided with a thermoelectric module, the thermoelectric module is used to absorb the heat generated by the conductive copper bar, and the heat generated by the copper bar is recovered by using the thermoelectric module assembly, so that the power battery system can be better integrated, and can effectively avoid the insulation damage of the copper bar during thermal runaway, and can also improve the heat dissipation efficiency of the battery cell.
[0032] Furthermore, the thermoelectric module includes: a first thermoelectric module, there are two first thermoelectric modules, each of which is arranged in a corresponding second interval; and a second thermoelectric module, which is arranged in the first interval.
[0033] In this embodiment, the thermoelectric module includes a first thermoelectric module and a second thermoelectric module. This configuration allows the heat of the conductive copper busbar 32 to be quickly transferred to the first thermoelectric module and the second thermoelectric module, effectively ensuring the heat dissipation efficiency of the conductive copper busbar 32 and effectively preventing the conductive copper busbar 32 from being damaged due to thermal runaway.
[0034] The thermoelectric effect module group is mainly composed of two effects, the Peltier effect and the Thomson effect. The main differences are as follows:
[0035] i. When two dissimilar metals form a closed circuit and a DC current flows through the circuit, a temperature difference will occur between the two junctions. This is the Peltier effect; the physical explanation of the Peltier effect is that the movement of charge carriers in a conductor generates an electric current. Because charge carriers occupy different energy levels in different materials, when they move from a higher energy level to a lower energy level, they release excess energy; conversely, when they move from a lower energy level to a higher energy level, they absorb energy from the outside world. Energy is absorbed or released at the interface between the two materials as heat.
[0036] ii. The Thomson effect is the phenomenon in which an electric potential is generated when there is a temperature difference between the two ends of a conductor. The Peltier effect is the phenomenon in which a temperature difference is generated between the two ends of a charged conductor (one end generates heat and the other end absorbs heat). The two together constitute the Seebeck effect.
[0037] Furthermore, a thermal pad 40 is provided between the first thermoelectric module 34 and the conductive copper bus 32 close to the first thermoelectric module 34 , and / or a thermal pad 40 is provided between the second thermoelectric module 35 and the two conductive copper buses 32 located on both sides of the second thermoelectric module 35 .
[0038] In this embodiment, the first thermoelectric module 34 and the second thermoelectric module 35 are both connected to the corresponding conductive copper bus 32 through the thermal pad 40. The thermal pad 40 can effectively transfer the heat generated by the conductive copper bus 32 to the first thermoelectric module 34 and the second thermoelectric module 35, effectively preventing the conductive copper bus 32 from being damaged due to thermal runaway.
[0039] Furthermore, the first thermoelectric module 34 includes multiple first thermoelectric units arranged in sequence along a second direction, the second direction being perpendicular to the first direction. The second thermoelectric module 35 includes multiple second thermoelectric units arranged in sequence along the second direction, the second thermoelectric units being arranged in the same direction as the first thermoelectric units, and the multiple first thermoelectric units being arranged in a one-to-one correspondence with the multiple second thermoelectric units. This arrangement effectively ensures that the first thermoelectric module 34 monitors the corresponding conductive copper busbar 32 through the first thermoelectric units, and the second thermoelectric module 35 monitors the corresponding conductive copper busbar 32 through the second thermoelectric units.
[0040] Furthermore, the thermoelectric integrated device also includes: support beams 37, there are two support beams 37, the two support beams 37 are respectively located in the two second intervals, the two support beams 37 are respectively arranged corresponding to the two first thermoelectric modules 34, the first side of each support beam 37 is in contact with the side of the corresponding first thermoelectric module 34 away from the conductive copper bus 32, and the second side of each support beam 37 is in contact with the corresponding battery cell 20, and the support beams 37 are made of insulating material.
[0041] In this embodiment, two support beams 37 are positioned corresponding to the two first thermoelectric modules 34, with the first side of each support beam 37 aligned with the side of the corresponding first thermoelectric module 34 facing away from the conductive copper busbar 32. The support beams 37 thus reinforce the power battery's strength and help transmit vehicle collision forces. Furthermore, their symmetrical integration allows for consistency testing of the power battery's conductive connection devices. Furthermore, both support beams 37 are constructed of an insulating material, insulating the thermoelectric integration device between them and preventing damage to the copper busbar during thermal runaway.
[0042] Furthermore, both support beams 37 are provided with a cooling structure 50. The cooling structure 50 comprises a cooling plate embedded within the support beam 37. The cooling plate is provided with multiple cooling water channels connected end-to-end. The multiple cooling water channels are arranged in a one-to-one correspondence with the multiple first thermoelectric units, and each cooling water channel is arranged adjacent to the corresponding first thermoelectric unit. The power battery system also includes a liquid supply tank containing coolant, and the cooling water channels are connected to the liquid supply tank. This arrangement allows the thermoelectric modules 31 attached to the support beam 37 to dissipate heat quickly, ensuring the heat dissipation efficiency and stability of the power battery system.
[0043] Furthermore, the power battery system further includes a sealing cover 36 , which is connected to both support beams 37 , and is used to close the top opening of the first compartment and the top opening of the second compartment.
[0044] In this embodiment, the sealing cover 36 is connected to both support beams 37. The sealing cover 36 is used to close the top opening of the first interval and the top opening of the second interval. The sealing cover can be connected to the longitudinal support beam by bolt connection, and the seal is also made of insulating material.
[0045] Furthermore, both support beams 37 are provided with a cooling structure 50. The cooling structure 50 comprises a cooling plate embedded within the support beam 37. The cooling plate is provided with multiple cooling water channels connected end-to-end. The multiple cooling water channels are arranged in a one-to-one correspondence with the multiple first thermoelectric units, and each cooling water channel is arranged adjacent to the corresponding first thermoelectric unit. The power battery system also includes a liquid supply tank containing coolant, and the cooling water channels are connected to the liquid supply tank. This arrangement allows the thermoelectric modules 31 attached to the support beam 37 to dissipate heat quickly, ensuring the heat dissipation efficiency and stability of the power battery system.
[0046] Furthermore, two conductive copper bars 32 are connected in series to form an electrical circuit, with one of the two conductive copper bars 32 being the positive electrode and the other being the negative electrode. This electrical circuit is used to connect the multiple battery cells 20 to the power battery output port. This arrangement effectively ensures the operating stability of the power battery system.
[0047] Furthermore, the power battery system also includes: a controller, which is used to determine that a cooling water channel fault occurs when an abnormal voltage is detected in the first thermoelectric unit relative to each other in the first direction; and the controller is used to determine that a fault occurs in the conductive copper bus 32 when an abnormal voltage is detected in multiple first thermoelectric units in the second direction.
[0048] In this embodiment, under normal conditions, no voltage is output because the current flowing through the copper busbars at both ends is the same and the heat generated is the same. Simultaneously, if different voltages are observed across the first thermoelectric cells in the same row in the second direction, this indicates a fault in the cooling water channel in that row. If different voltages are observed across the two first thermoelectric cells in the second direction, and voltage is observed across all first thermoelectric cells in the first thermoelectric modules 34 in the first direction, this indicates a fault in the conductive copper busbar. A temperature difference exists on both sides of the first thermoelectric modules 34, which recycles the heat generated in the conductive copper busbar I into voltage. The two first thermoelectric modules 34 are connected in series to generate a 12V voltage, which is then stored in a low-voltage battery.
[0049] In another embodiment of the present application, a vehicle is provided, including a power battery system, which is the power battery system described above.
[0050] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.
[0051] In addition to the above, it should be noted that references to "one embodiment," "another embodiment," "an embodiment," and the like in this specification refer to specific features, structures, or characteristics described in conjunction with that embodiment as being included in at least one embodiment generally described in this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in conjunction with any embodiment, it is intended that such feature, structure, or characteristic, when implemented in conjunction with other embodiments, also fall within the scope of the present invention.
[0052] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.
[0053] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.
Claims
1. A power battery system, characterized in that: include: A box body (10), wherein the box body (10) has an inner cavity (11); A thermoelectric integrated device, the thermoelectric integrated device is located in the inner cavity (11), and the inner cavity (11) is divided into two battery cell installation cavities (30) along a first direction, at least one battery cell (20) is installed in each of the battery cell installation cavities (30), the thermoelectric integrated device also includes a thermoelectric module (31) and two conductive copper bars (32), the two conductive copper bars (32) are arranged at intervals along the first direction, the two conductive copper bars (32) are arranged in a one-to-one correspondence with the two battery cell installation cavities (30), and each conductive copper bar (32) is electrically connected to the battery cell (20) in the corresponding battery cell installation cavity (30); A first interval is formed between the two conductive copper bars (32), and a second interval is formed between each conductive copper bar (32) and the corresponding battery core (20). At least one of the first interval and the second interval is provided with the thermoelectric module (31), and the thermoelectric module (31) is used to absorb heat generated by the conductive copper bar (32).
2. The power battery system according to claim 1, characterized in that: The thermoelectric module (31) comprises: A first thermoelectric module (34), wherein there are two first thermoelectric modules (34), and each first thermoelectric module (34) is arranged in a corresponding second interval; A second thermoelectric module (35), the second thermoelectric module (35) is arranged in the first interval.
3. The power battery system according to claim 2, characterized in that: A thermal pad (40) is provided between the first thermoelectric module (34) and the conductive copper bus (32) close to the first thermoelectric module (34), and / or the thermal pad (40) is provided between the second thermoelectric module (35) and two conductive copper buses (32) located on both sides of the second thermoelectric module (35).
4. The power battery system according to claim 2 or 3, characterized in that: The first thermoelectric module (34) includes a plurality of first thermoelectric units arranged in sequence along a second direction, the second direction being perpendicular to the first direction, the second thermoelectric module (35) includes a plurality of second thermoelectric units arranged in sequence along the second direction, the arrangement direction of the second thermoelectric units being the same as the arrangement direction of the first thermoelectric units, and the plurality of first thermoelectric units being arranged in one-to-one correspondence with the plurality of second thermoelectric units.
5. The power battery system according to claim 4, characterized in that: The thermoelectric integrated device further comprises: A support beam (37), wherein there are two support beams (37), the two support beams (37) are respectively located in the two second intervals, the two support beams (37) are respectively arranged corresponding to the two first thermoelectric modules (34), the first side of each support beam (37) is in contact with the side of the corresponding first thermoelectric module (34) away from the conductive copper bus (32), and the second side of each support beam (37) is in contact with the corresponding battery core (20), and the support beam (37) is made of insulating material.
6. The power battery system according to claim 5, characterized in that: A cooling structure (50) is provided in each of the two support beams (37), and the cooling structure (50) includes a cooling plate buried in the support beam (37), and a plurality of cooling water channels connected end to end are provided in the cooling plate, and the plurality of cooling water channels are arranged in a one-to-one correspondence with the plurality of the first thermoelectric units, and each cooling water channel is arranged adjacent to the corresponding first thermoelectric unit. The power battery system also includes a liquid supply tank, and the liquid supply tank is provided with a coolant, and the cooling water channel is connected to the liquid supply tank.
7. The power battery system according to claim 5, characterized in that: The power battery system further comprises a sealing cover (36), wherein the sealing cover (36) is connected to both of the two support beams (37), and the sealing cover (36) is used to close the top opening of the first interval and the top opening of the second interval.
8. The power battery system according to claim 1, characterized in that: The two conductive copper bars (32) are connected in series to form an electrical circuit, one of the two conductive copper bars (32) is a positive electrode, and the other of the two conductive copper bars (32) is a negative electrode, and the electrical circuit is used to connect the plurality of battery cells (20) to an output port of a power battery.
9. The power battery system according to claim 4, characterized in that: The power battery system further comprises: a controller, the controller being used to determine that a cooling water channel has failed when an abnormal voltage is detected in the first thermoelectric unit relative to the first direction, and the controller being used to determine that a fault has occurred in the conductive copper busbar (32) when an abnormal voltage is detected in a plurality of the first thermoelectric units in the second direction.
10. A vehicle, comprising a power battery system, characterized in that: The power battery system is the power battery system according to any one of claims 1 to 9.