Power battery and vehicle comprising same

Abstract

The present application relates to, but is not limited to, the technical field of vehicles, and in particular to a power battery and a vehicle comprising same. A battery pack at least comprises: battery cells, each having a first side surface and a second side surface arranged adjacent to each other; a collection board, mounted on the first side surfaces; and a parameter collection mechanism, comprising a circuit board, a parameter collector, and a protective board, wherein one end of the circuit board is attached to one second side surface, the other end of the circuit board is electrically connected to the collection board, the parameter collector is electrically connected to the circuit board, and the protective board surrounds the periphery of the parameter collector, so that the parameter collector is located inside the protective board. A vehicle, comprising the power battery. The present application not only can accurately and directly measure parameters of the power battery, improve the performance of the battery cells, optimize charging time, and prolong the service life of the power battery, but also can ensure that the parameter collector is not affected by external action force.

Description

Power batteries and their automobiles

[0001] This application claims priority to Chinese Patent Application No. 202421670235.7, filed on July 15, 2024, entitled "Power Battery and Automobile Thereof", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to, but is not limited to, the field of vehicle technology, and in particular to a power battery and the automobile thereof. Background Technology

[0003] Within a power battery, the accuracy of its state parameters (temperature, pressure, etc.) is crucial for battery life and PACK charging. For example, temperature not only affects the rate of chemical reactions in the battery but also leads to increased internal resistance, reduced capacity, and decreased charging and discharging efficiency. Especially under extreme temperature conditions, such as excessively low or high temperatures, charging efficiency can be affected, battery aging can be accelerated, battery life can be reduced, and even safety issues can arise.

[0004] Optionally, when collecting parameters at the terminals of the battery cell, if the cell is long or the distance between the positive and negative terminals is large, the collected parameters at the terminals or top cover may not reflect the true data of the cell. When the vehicle is under harsh operating conditions, such as below -20°C, the collected temperature parameters may deviate from the actual temperature of the cell, affecting the discharge strategy and potentially causing the entire vehicle to break down. In one optional implementation, parameters from other surfaces of the battery cell are collected. However, the battery pack is subjected to not only external stress but also its own expansion force during operation. This can easily lead to damage to components on that surface. Summary of the Invention

[0005] The following is an overview of the subject matter described in detail herein. This overview is not intended to limit the scope of the claims.

[0006] This application provides a power battery and its vehicle that can accurately measure cell parameters and are not easily damaged.

[0007] This application provides the following technical solution:

[0008] A battery pack, the battery pack comprising at least:

[0009] The battery cell has a first side and a second side arranged adjacent to each other.

[0010] The data acquisition board is mounted on the first side.

[0011] The parameter acquisition mechanism includes a circuit board, a parameter acquisition device, and a protective plate. One end of the circuit board is attached to the second side, and the other end is electrically connected to the acquisition plate. The parameter acquisition device is electrically connected to the circuit board. The protective plate surrounds the circumference of the parameter acquisition device and places the parameter acquisition device inside the protective plate.

[0012] In one embodiment, the parameter acquisition mechanism further includes a baffle, the protective plate having an open receiving slot, the parameter acquisition device being located in the receiving slot, and the baffle covering the open.

[0013] In one embodiment, the protective plate is provided with a protrusion that protrudes from the surface of the protective plate and surrounds the circumference of the opening, and the baffle covers the protrusion.

[0014] In one embodiment, the parameter acquisition device is soldered onto the circuit board.

[0015] In one embodiment, the parameter acquisition mechanism further includes a reinforcing plate disposed on the side of the circuit board away from the parameter acquisition device.

[0016] In one embodiment, the parameter acquisition mechanism further includes a thermal pad, one side of which is attached to the second side and the other side is attached to the circuit board.

[0017] In one embodiment, an end plate is mounted on the second side, and the protective plate is mounted on the end plate, with the surface of the end plate away from the second side protruding from the protective plate.

[0018] In one embodiment, the end plate is provided with multiple reinforcing ribs, and the reinforcing ribs protrude from the surface of the protective plate.

[0019] In one embodiment, the parameter collector is located in the middle of the second side, and the height of the parameter collector accounts for at least one-third of the height of the second side.

[0020] This application also provides the following technical solutions:

[0021] An automobile includes the power battery described in any of the above embodiments.

[0022] The power battery design places the parameter acquisition device on the second side of the battery cell, rather than on the first side, bringing it closer to the cell and facilitating accurate measurement of cell parameters. Simultaneously, the protective plate surrounds the parameter acquisition device, placing it inside the plate. This design deflects external stresses and cell expansion forces onto the protective plate, reducing their impact on the acquisition device and preventing damage. This configuration not only enables accurate and direct measurement of battery parameters, improving cell performance, optimizing charging time, and extending battery life, but also ensures the parameter acquisition device is unaffected by external forces.

[0023] After reading and understanding the accompanying diagrams and detailed descriptions, the other aspects can be understood. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 is a schematic diagram of the power battery structure provided in this application;

[0026] Figure 2 is a partial enlarged view of point A in Figure 1 provided in this application;

[0027] Figure 3 is a schematic diagram of the main structure of the battery cell provided in this application;

[0028] Figure 4 is a schematic diagram of the parameter acquisition mechanism provided in this application;

[0029] Figure 5 is a partial enlarged view of section B in Figure 4 provided in this application;

[0030] Figure 6 is an exploded view of the parameter acquisition mechanism provided in this application;

[0031] Figure 7 is a magnified view of part C in Figure 6 provided in this application.

[0032] The component reference numerals are as follows: 100, Power battery; 10, Battery cell; 11, First side; 12, Second side; 13, End plate; 131, Reinforcing rib; 20, Data acquisition plate; 30, Parameter acquisition mechanism; 31, Circuit board; 311, Connector; 32, Parameter acquisition device; 33, Protective plate; 331, Opening; 332, Receiving groove; 333, Protrusion; 334, Mounting hole; 34, Baffle; 35, Reinforcing plate; 36, Thermal pad. Detailed Implementation

[0033] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0034] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0038] As shown in Figures 1 to 7, this application provides a power battery 100, which includes a battery cell 10, a data acquisition board 20, and a parameter acquisition mechanism 30. The battery cell 10 has a first side 11 and a second side 12 arranged adjacent to each other. The data acquisition board 20 is mounted on the first side 11. The parameter acquisition mechanism 30 includes a circuit board 31, a parameter collector 32, and a protective plate 33. One end of the circuit board 31 is attached to the second side 12, and the other end is electrically connected to the data acquisition board 20. The parameter collector 32 is electrically connected to the circuit board 31. The protective plate 33 surrounds the parameter collector 32 around its periphery and places the parameter collector 32 inside the protective plate 33.

[0039] Thus, by placing the parameter acquisition device 32 on the second side 12 of the battery cell 10, accurate measurement of the battery cell 10 parameters is facilitated. Simultaneously, combined with the protective plate 33, the parameter acquisition device 32 is enclosed within the protective plate 33. This way, external stress and battery cell expansion forces are directed onto the protective plate 33, reducing the impact on the parameter acquisition device 32 and preventing damage. In other words, this design not only enables accurate and direct measurement of the power battery 100 temperature, improving the performance of the battery cell 10, optimizing charging time, and extending the lifespan of the power battery 100, but also ensures that the parameter acquisition device 32 is unaffected by external forces.

[0040] It should be explained that the length of the second side 12 is greater than the length of the first side 11, so that when the heights are the same, the area of ​​the second side 12 is greater than the area of ​​the first side 11.

[0041] In this embodiment, not only is the acquisition plate 20 installed on the first side 11, but it is also equipped with an electrode post. That is, the parameter acquisition device 32 is measuring the parameters of the second side 12.

[0042] It should be explained that the parameter acquisition unit 32 can acquire parameters such as temperature, pressure, and heat of the battery cell 10. Accordingly, the parameter acquisition unit 32 can be configured as a temperature sensor, pressure sensor, heat sensor, or parameter measuring instrument, etc.

[0043] In one embodiment, the parameter acquisition unit 32 is configured as a temperature sensor to specifically illustrate its working process and principle. It is understood that the power battery is an indispensable component of new energy vehicles, and its temperature is one of the important factors affecting its lifespan. Therefore, in an optional implementation, a sensor is used to measure the power battery temperature in real time to better understand its state. In an optional implementation, the sensor can measure either the temperature of the battery terminals or the temperature of the battery cells. However, when collecting terminal temperature data, the temperature of the cell terminals or top cover cannot reflect the true temperature of the cell, leading to inaccurate measurements. Collecting the temperature of the other side of the power battery, on the other hand, can easily damage the data acquisition component due to the significant external forces acting on the battery.

[0044] Therefore, the temperature of the second side 12 is first acquired by the parameter acquisition device 32 to obtain the temperature of the battery cell 10. The parameter acquisition device 32 transmits the measured temperature to the circuit board 31, and then to the acquisition board 20 through the circuit board 31. This achieves the acquisition of the temperature of the battery cell 10, improving the accuracy of the temperature acquisition. In this way, the thermal management system associated with the power battery 100 can more accurately adjust the temperature of the battery cell 10 based on the temperature signal. For example, when the temperature is low, the thermal management system can heat the battery cell 10 to enable it to discharge better in a low-temperature environment. When the temperature is high, the thermal management system can cool the battery cell 10 to allow it to operate in a suitable environment. At the same time, combined with the setting of the protective plate 33, the parameter acquisition device 32 can be surrounded by the protective plate 33 and placed inside the protective plate 33. In this way, external stress and battery cell expansion force will act on the protective plate 33, thereby reducing the impact on the parameter acquisition device 32 and preventing damage to the parameter acquisition device 32.

[0045] In one embodiment, as shown in Figures 1 to 3, an end plate 13 is mounted on the second side 12, and a protective plate 33 is mounted on the end plate 13. The surface of the end plate 13 away from the second side 12 protrudes from the protective plate 33. That is, the height of the reinforcing rib 131 is higher than the height of the protective plate 33. In this way, when the power battery 100 is subjected to an external force, it will first be blocked and bear the force by the end plate 13. That is, by setting the end plate 13, the protective plate 33 can be protected, thereby protecting the parameter acquisition device 32.

[0046] Alternatively, as shown in Figure 2, the end plate 13 is provided with multiple reinforcing ribs 131, and the reinforcing ribs 131 protrude from the surface of the protective plate 33. In this way, the structural strength of the end plate 13 itself is further improved by the reinforcing ribs 131, thereby achieving protection for the protective plate 33.

[0047] For example, the number of reinforcing ribs 131 can be 10, 15, etc., and multiple reinforcing ribs 131 are arranged in an interlaced manner and connected to a reinforcing mesh, so that multiple reinforcing ribs 131 are combined with each other to further improve the structural strength of the end plate 13.

[0048] As shown in Figure 4, the circuit board 31 is configured as a flexible circuit board so that it can extend from the second side 12 to the first side 11 and be electrically connected to the acquisition board 20.

[0049] In one embodiment, a connector 311 is provided at the end of the circuit board 31 away from the parameter acquisition device 32. The connector 311 is connected to the acquisition board 20, thereby transmitting the parameters measured by the parameter acquisition device 32 to the acquisition board 20, so as to realize the acquisition board 20 to acquire the parameters of the battery cell 10.

[0050] Optionally, as shown in Figure 5, the parameter acquisition unit 32 is soldered onto the circuit board 31. Specifically, the soldering method can be reflow soldering or wave soldering.

[0051] Here, the parameter acquisition unit 32 can be configured as a thermistor sensor or an coupled-coupled sensor. In this embodiment, the parameter acquisition unit 32 is configured as a thermistor sensor.

[0052] In one embodiment, referring back to Figure 3, the parameter acquisition device 32 is located in the middle of the second side 12, and the height of the parameter acquisition device 32 occupies at least one-third of the height of the second side 12. That is, in the height direction, the upper end of the parameter acquisition device 32 is located at the center of the upper one-third and lower one-third of the distance from the battery cell 10. Here, according to the winding characteristics of the battery cell 10 and simulation, the temperature of the battery cell 10 is lowest at this location. By arranging the parameter acquisition device 32 at this location, the actual temperature of the battery cell 10 can be obtained, so that even under more severe temperature conditions, such as below -20°C, the acquired temperature is closer to the actual temperature of the battery cell 10, allowing for better deployment of the discharge strategy.

[0053] As shown in Figure 5, the protective plate 33 is configured as an epoxy resin board. This gives the protective plate 33 not only good structural strength but also good insulation properties. In other embodiments, the protective plate 33 can also be made of other materials.

[0054] As shown in Figures 5 to 7, the parameter acquisition mechanism 30 also includes a baffle 34. The protective plate 33 has a receiving groove 332 with an opening 331. The parameter acquisition device 32 is located in the receiving groove 332, and the baffle 34 covers the opening 331. In this way, the baffle 34 blocks the opening 331, preventing external stress from being transmitted to the parameter acquisition device 32 and causing damage to the parameter acquisition device 32.

[0055] Optionally, as shown in Figure 7, the protective plate 33 is provided with a protrusion 333, which protrudes from the surface of the protective plate 33 and surrounds the circumference of the opening 331. The baffle 34 covers the protrusion 333. In this way, when subjected to external force, the protrusion 333 bears the force first, that is, the protrusion 333 effectively protects the protective plate 33, thereby effectively ensuring the safety of the parameter acquisition device 32.

[0056] In one embodiment, the protective plate 33 is further provided with mounting holes 334 at both ends, through which the protective plate 33 is fixed to the end plate 13. Furthermore, the height of the protrusion 333 is not higher than that of the end plate 13. Thus, the end plate 13, the protrusion 333, and the protective plate 33 provide triple protection for the parameter acquisition device 32, greatly ensuring the safety of the parameter acquisition device 32.

[0057] As shown in Figure 7, the parameter acquisition mechanism 30 also includes a reinforcing plate 35, which is located on the side of the circuit board 31 away from the parameter acquisition device 32. The reinforcing plate 35 is provided to prevent poor soldering due to the relatively soft deformation of the circuit board 31 during the soldering process of the parameter acquisition device 32.

[0058] Optionally, as shown in Figure 7, the parameter acquisition mechanism 30 further includes a thermal pad 36, one side of which is attached to the second side 12, and the other side is attached to the circuit board 31. Thus, by having the thermal pad 36 attached to the second side 12 of the battery cell 10, the temperature of the second side 12 of the battery cell 10 is transferred to the parameter acquisition unit 32, improving the accuracy of the temperature measurement of the battery cell 10.

[0059] Optionally, the thermal pad 36 is elastic and is compressed and fitted between the second side 12 and the circuit board 31. This allows the thermal pad 36 to adhere tightly to the second side 12, thereby improving the efficiency of temperature transfer and further enhancing the accuracy of the parameter acquisition unit 32 in measuring the temperature of the battery cell 10.

[0060] This application also provides a vehicle including the power battery 100 in the above embodiments.

[0061] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0062] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A power battery, comprising at least: a cell (10) having a first side (11) and a second side (12) arranged adjacently; a collecting plate (20) mounted on the first side (11); a parameter collecting mechanism (30) comprising a circuit board (31), a parameter collector (32) and a protection plate (33), one end of the circuit board (31) being attached to the second side (12) and the other end being electrically connected to the collecting plate (20), the parameter collector (32) being electrically connected to the circuit board (31), and the protection plate (33) being arranged around the parameter collector (32) and allowing the parameter collector (32) to be located inside the protection plate (33). 2.The power battery according to claim 1, wherein the parameter collecting mechanism (30) further comprises a baffle (34), the protection plate (33) is provided with a receiving groove (332) having an opening (331), the parameter collector (32) is located in the receiving groove (332), and the baffle (34) covers the opening (331).

3. The power cell of claim 1 or 2, wherein, The protection plate (33) is provided with a protrusion (333) protruding from the surface of the protection plate (33), and the protrusion (333) is arranged around the opening (331), and the baffle (34) covers the protrusion (333).

4. The power cell of any one of claims 1 to 3, wherein, The parameter collector (32) is welded to the circuit board (31). 5.The power battery according to any one of claims 1 to 4, wherein the parameter collecting mechanism (30) further comprises a reinforcing plate (35) arranged on the side of the circuit board (31) away from the parameter collector (32). 6.The power battery according to any one of claims 1 to 5, wherein the parameter collecting mechanism (30) further comprises a heat-conducting pad (36) having one side attached to the second side (12) and the other side attached to the circuit board (31).

7. The power cell of any one of claims 1 to 6, wherein, An end plate (13) is mounted on the second side (12), the protection plate (33) is mounted on the end plate (13), and the surface of the end plate (13) away from the second side (12) protrudes from the protection plate (33).

8. The power cell of any one of claims 1 to 7, wherein, The end plate (13) is provided with a plurality of reinforcing ribs (131) protruding from the surface of the protection plate (33).

9. The power cell of any one of claims 1 to 8, wherein, The parameter collector (32) is located at the middle of the second side (12), and the height of the parameter collector (32) accounts for at least one third of the height of the second side (12). 10.An automobile comprising the power battery according to any one of claims 1 to 9.

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