Power battery and automobile thereof

Abstract

The utility model relates to the technical field of vehicles, in particular to a power battery and an automobile with the same. A battery pack at least comprises: a battery cell having a first side surface and a second side surface adjacent to each other; the acquisition plate is mounted on the first side surface; the parameter acquisition mechanism comprises a circuit board, a parameter acquisition device and a protection plate, one end of the circuit board is attached to the second side face, the other end of the circuit board is electrically connected with the acquisition plate, the parameter acquisition device is electrically connected to the circuit board, the protection plate is arranged in the circumferential direction of the parameter acquisition device in a surrounding mode, and the protection plate is electrically connected with the circuit board. And the parameter collector is positioned in the protection plate. An automobile includes a power battery. Parameters of the power battery can be accurately and directly measured, the cell performance is improved, the charging time is optimized, and the service life of the power battery is prolonged; in addition, the parameter collector can be ensured not to be influenced by external acting force.

Description

Technical Field

[0001] The present application relates to the technical field of vehicles, and particularly to a power battery and an automobile thereof. Background Art

[0002] Inside a power battery, the accuracy of the state parameters (temperature, pressure, etc.) of the power battery is crucial for battery life and PACK charging. For example, temperature not only affects the chemical reaction rate of the battery, but also causes an increase in internal resistance, a decrease in capacity, and a reduction in charge and discharge efficiency. Especially in extreme temperature conditions, such as too low or too high temperatures, it may affect the charging efficiency, accelerate battery aging, reduce battery life, and even cause safety problems.

[0003] Generally, parameters are collected at the pole posts of the battery cells currently. However, when the size of the battery cell is relatively long or the distance between the positive and negative pole posts is far, collecting the parameters of the pole posts or the top cover of the battery cell cannot reflect the true data of the battery cell. When the vehicle is in a relatively harsh working condition, such as below -20°C, the collected temperature parameter deviates from the actual temperature of the battery cell, affecting the discharge strategy, and seriously, it may cause the vehicle to break down. In related technologies, parameters of other surfaces of the battery cell are designed to be collected. However, during the operation of the battery pack, it is not only affected by external stress but also by the force of its own expansion. This easily causes damage to the components on this surface. Utility Model Content

[0004] Based on this, it is necessary to provide a power battery and an automobile thereof that can accurately measure the parameters of the battery cell and are not easily damaged.

[0005] To solve the above technical problems, the present application provides the following technical solutions:

[0006] A battery pack, the battery pack at least includes:

[0007] A battery cell, having a first side and a second side adjacent to each other;

[0008] A collecting board, installed on the first side;

[0009] A parameter collecting mechanism, including a circuit board, a parameter collector, and a protection board. One end of the circuit board is attached to the second side, and the other end is electrically connected to the collecting board. The parameter collector is electrically connected to the circuit board. The protection board surrounds the circumference of the parameter collector and makes the parameter collector located inside the protection board.

[0010] In one embodiment, the parameter collecting mechanism further includes a baffle. The protection board is provided with a receiving groove with an open setting. The parameter collector is located in the receiving groove, and the baffle covers the open end.

[0011] In one embodiment, a convex portion is provided on the protective plate. The convex portion protrudes from the surface of the protective plate, and the convex portion surrounds the circumference of the opening. The baffle is covered on the convex portion.

[0012] In one embodiment, the parameter collector is welded to the circuit board.

[0013] In one embodiment, the parameter acquisition mechanism further includes a reinforcing plate, and the reinforcing plate is disposed on a side surface of the circuit board away from the parameter collector.

[0014] In one embodiment, the parameter acquisition mechanism further includes a heat-conducting pad. One side surface of the heat-conducting pad is attached to the second side surface, and the other side is attached to the circuit board.

[0015] In one embodiment, an end plate is mounted on the second side surface. The protective plate is mounted on the end plate, and a surface of the end plate away from the second side surface protrudes from the protective plate.

[0016] In one embodiment, a plurality of reinforcing ribs are provided on the end plate, and the reinforcing ribs protrude from the surface of the protective plate.

[0017] In one embodiment, the parameter collector is located at a middle position of the second side surface, and a height of the parameter collector occupies at least one-third of a height of the second side surface.

[0018] The present application further provides the following technical solutions:

[0019] An automobile includes the power battery described in any one of the above embodiments.

[0020] Compared with the prior art, by disposing the parameter collector on the second side surface of the battery cell, that is, the parameter collector is no longer disposed on the first side surface, the parameter collector is closer to the battery cell, which is beneficial to accurately measuring the parameters of the battery cell. At the same time, in combination with the setting of the protective plate, the parameter collector can be surrounded by the protective plate, and the parameter collector is located inside the protective plate. In this way, both the external stress and the battery cell expansion force act on the protective plate, thereby reducing the influence on the parameter collector and avoiding damage to the parameter collector. That is, by such a setting, not only can the parameters of the power battery be accurately and directly measured, the performance of the battery cell can be improved, the charging time can be optimized, and the service life of the power battery can be extended; moreover, the parameter collector can be ensured to be not affected by external acting forces. Description of the Drawings

[0021] To more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0022] Figure 1 Schematic diagram of the power battery structure provided by the present application.

[0023] Figure 2 Provided by the present application Figure 1 Partial enlarged view at A in

[0024] Figure 3 Front view structure schematic diagram of the battery cell provided by the present application.

[0025] Figure 4 Schematic diagram of the structure of the parameter acquisition mechanism provided by the present application.

[0026] Figure 5 Provided by the present application Figure 4 Partial enlarged view at B in

[0027] Figure 6 Exploded view of the parameter acquisition mechanism provided by the present application.

[0028] Figure 7 Provided by the present application Figure 6 Partial enlarged view at C in

[0029] The reference numerals of each component are as follows:

[0030] 100, power battery; 10, battery cell; 11, first side; 12, second side; 13, end plate; 131, reinforcing rib; 20, acquisition board; 30, parameter acquisition mechanism; 31, circuit board; 311, connector; 32, parameter collector; 33, protection board; 331, opening; 332, receiving groove; 333, convex part; 334, mounting hole; 34, baffle; 35, reinforcing plate; 36, heat conduction pad. Detailed implementation manners

[0031] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will make a detailed description of the specific implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0032] It should be noted that when a component is referred to as "fixed to" or "disposed 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 at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are only for the purpose of illustration and do not represent the only implementation.

[0033] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0034] In this application, unless otherwise clearly specified and defined, the first feature may be in direct contact with the second feature "on" or "under" the second feature, or the first feature and the second feature may be in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature has a lower horizontal height than the second feature.

[0035] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific implementations and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the related listed items.

[0036] As Figures 1 to 7 shown, this application provides a power battery 100, which includes a battery cell 10, a collecting board 20 and a parameter collecting mechanism 30. The battery cell 10 has a first side 11 and a second side 12 arranged adjacent to each other; the collecting board 20 is mounted on the first side 11; the parameter collecting mechanism 30 includes a circuit board 31, a parameter collector 32 and a protection board 33. One end of the circuit board 31 is attached to the second side 12, and the other end is electrically connected to the collecting board 20. The parameter collector 32 is electrically connected to the circuit board 31. The protection board 33 surrounds the circumference of the parameter collector 32 and makes the parameter collector 32 located inside the protection board 33.

[0037] Thus, by arranging the parameter collector 32 on the second side 12 of the battery cell 10, it is conducive to accurately measuring the parameters of the battery cell 10. At the same time, in combination with the arrangement of the protection plate 33, the parameter collector 32 can be surrounded by the protection plate 33, and the parameter collector 32 can be located inside the protection plate 33. In this way, both the external stress and the battery cell expansion force will act on the protection plate 33, thereby reducing the influence on the parameter collector 32 and preventing the parameter collector 32 from being damaged. That is to say, with such an arrangement, not only can the temperature of the power battery 100 be accurately and directly measured, the performance of the battery cell 10 be improved, the charging time be optimized, and the service life of the power battery 100 be extended, but also the parameter collector 32 can be ensured to be unaffected by external forces.

[0038] It should be noted that the length of the second side 12 is greater than that of the first side 11. Thus, when the heights are the same, the area of the second side 12 is greater than that of the first side 11.

[0039] In this embodiment, not only the acquisition board 20 is installed on the first side 11, but also the terminal post is installed. That is to say, the parameter collector 32 measures the parameters of the second side 12.

[0040] It should be noted that the parameter collector 32 can collect parameters such as the temperature, pressure, and heat of the battery cell. Correspondingly, the parameter collector 32 can be configured as a temperature sensor, a pressure sensor, a heat sensor, or a parameter measuring instrument, etc.

[0041] In one embodiment, taking the parameter collector 32 configured as a temperature sensor as an example, the working process and principle of the parameter collector 32 are specifically described. It can be understood that the power battery is an essential component in new energy vehicles, and the temperature of the power battery is one of the important factors affecting the service life of the power battery. Therefore, in related technologies, sensors are always arranged to measure the temperature of the power battery in real time to better grasp the state of the power battery. In related technologies, there are methods to measure the temperature of the terminal post of the power battery and also to measure the temperature of the battery cell of the power battery. When collecting the temperature of the terminal post, since the temperature of the battery cell terminal post or the top cover cannot reflect the true temperature of the battery cell, the measurement will be inaccurate. When collecting the temperature of the other side of the power battery, because the power battery is subject to more external forces, it is easy to cause damage to the collecting component.

[0042] Therefore, here, first, the temperature of the second side 12 is collected by the parameter collector 32 to obtain the temperature of the battery cell 10. The parameter collector 32 transmits the measured temperature to the circuit board 31 and then to the acquisition board 20 through the circuit board. In this way, the temperature of the battery cell 10 is collected, improving the accuracy of the temperature collection of the battery cell 10. Thus, the thermal management system associated with the power battery 100 can adjust the temperature of the battery cell more accurately according to this temperature signal. For example, when the temperature is low, the thermal management system can heat the battery cell so that the battery cell can better discharge in a low-temperature environment. When the temperature is high, the thermal management system can cool the battery cell so that the battery cell can work in a suitable environment. At the same time, combined with the setting of the protection plate 33, the parameter collector 32 can be surrounded by the protection plate 33, and the parameter collector 32 is located inside the protection plate 33. In this way, both the external stress and the expansion force of the battery cell will act on the protection plate 33, thereby reducing the influence on the parameter collector 32 and avoiding damage to the parameter collector 32.

[0043] In one embodiment, as Figures 1 to 3 shown, an end plate 13 is installed on the second side 12, the protection plate 33 is installed 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. That is, the height of the reinforcing rib 131 is higher than the height of the protection plate 33. In this way, when the power battery 100 is subjected to an external force, it will first be blocked by the end plate 13 and bear the force. That is, through the setting of the end plate 13, the protection plate 33 can be protected, and thus the parameter collector 32 can be protected.

[0044] Preferably, as Figure 2 shown, multiple reinforcing ribs 131 are provided on the end plate 13 and the reinforcing ribs 131 protrude from the surface of the protection plate 33. In this way, the structural strength of the end plate 13 itself is further enhanced through the reinforcing ribs 131, thereby protecting the protection plate 33.

[0045] Exemplarily, the number of the reinforcing ribs 131 can be 10, 15, etc. The multiple reinforcing ribs 131 are arranged in a staggered manner and communicate to form a reinforcing mesh, so that the multiple reinforcing ribs 131 are combined with each other to further improve the structural strength of the end plate 13.

[0046] As Figure 4 shown, the circuit board 31 is arranged 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.

[0047] In one embodiment, a connector 311 is provided at one end of the circuit board 31 away from the parameter collector 32. The connector 311 is connected to the acquisition board 20, thereby transmitting the parameters measured by the parameter collector 32 to the acquisition board 20 to realize the acquisition of the parameters of the battery cell 10 by the acquisition board 20.

[0048] Further, as Figure 5 shown, the parameter collector 32 is welded to the circuit board 31 by welding. Specifically, the welding method can be reflow soldering or wave soldering.

[0049] Here, the parameter collector 32 can be set as a thermistor sensor or an electro-couple sensor. In this embodiment, the parameter collector 32 is configured as a thermistor sensor.

[0050] In one embodiment, referring back to Figure 3 , the parameter collector 32 is located at the middle position 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. That is, in the height direction, the upper end of the parameter collector 32 is at the central position one-third above and one-third below the upper part of the battery cell 10. Here, according to the winding characteristics and simulation of the battery cell 10, the temperature at this position of the battery cell 10 is the lowest. By arranging the parameter collector 32 at this position, the real temperature of the battery cell 10 can be obtained, so that under relatively harsh temperature conditions, such as below -20 °C, the collected temperature is relatively close to the actual temperature of the battery cell, in order to better arrange the discharge strategy.

[0051] As Figure 5 shown, the protective plate 33 is configured as an epoxy resin plate. In this way, the protective plate 33 not only has good structural strength but also has good insulation performance. In other embodiments, the protective plate 33 can also be set as a plate made of other materials.

[0052] As Figures 5 to 7 shown, the parameter collection mechanism 30 further includes a baffle 34. The protective 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. In this way, the baffle 34 blocks the opening 331 to prevent external stress from being transmitted to the parameter collector 32 and causing damage to the parameter collector 32.

[0053] Further, as Figure 7 shown, the protective plate 33 is provided with a convex portion 333. The convex portion 333 protrudes from the surface of the protective plate 33, and the convex portion 333 surrounds the circumference of the opening 331. The baffle 34 covers the convex portion 333. In this way, when an external force is applied, the convex portion 333 bears the force first, that is, the convex portion 333 is used to effectively protect the protective plate 33, and thus effectively ensure the safety of the parameter collector 32.

[0054] In one embodiment, mounting holes 334 are further provided at both ends of the protective plate 33, and the protective plate 33 is fixed to the end plate 13 through the mounting holes 334. Moreover, the height of the convex portion 333 is not higher than that of the end plate 13. Thus, triple protection for the parameter collector 32 is achieved through the end plate 13, the convex portion 333, and the protective plate 33, greatly ensuring the safety of the parameter collector 32.

[0055] As Figure 7 shown, the parameter acquisition mechanism 30 further includes a reinforcing plate 35, and the reinforcing plate 35 is disposed on a side of the circuit board 31 away from the parameter collector 32. The setting of the reinforcing plate 35 avoids poor soldering caused by deformation of the circuit board 31 being too soft during the soldering process of the parameter collector 32.

[0056] Furthermore, as Figure 7 shown, the parameter acquisition mechanism 30 further includes a heat-conducting pad 36. One side of the heat-conducting pad 36 is attached to the second side 12, and the other side is attached to the circuit board 31. Thus, by attaching the heat-conducting pad 36 to the second side 12 of the battery cell 10, the temperature of the second side 12 of the battery cell 10 is transmitted to the parameter collector 32, improving the accuracy of the temperature measurement of the battery cell 10.

[0057] Preferably, the heat-conducting pad 36 has elasticity and is assembled between the second side 12 and the circuit board 31 in a compressed manner. Thus, the heat-conducting pad 36 can be closely attached to the second side 12, thereby improving the efficiency of temperature transmission to further improve the accuracy of the parameter collector 32 in measuring the temperature of the battery cell 10.

[0058] This application also provides an automobile, including the power battery 100 in the above embodiment.

[0059] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, 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, it should be considered as the scope described in this specification.

[0060] The above-described embodiments only represent several implementation manners of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of this application, several modifications and improvements can still be made, and these all belong to the protection scope of this application. Therefore, the patent protection scope of this application should be subject to the appended claims.

Claims

1. A power battery, characterized in that: The power battery at least comprises: A battery cell (10) having a first side surface (11) and a second side surface (12) arranged adjacent to each other; A collection plate (20) mounted on the first side surface (11); A parameter collection mechanism (30) comprises a circuit board (31), a parameter collector (32) and a protective plate (33); one end of the circuit board (31) is in contact with the second side surface (12), and the other end is electrically connected to the collection board (20); the parameter collector (32) is electrically connected to the circuit board (31); the protective plate (33) is arranged around the parameter collector (32) so that the parameter collector (32) is located inside the protective plate (33).

2. The power battery according to claim 1, characterized in that: The parameter collection mechanism (30) further comprises a baffle (34); a receiving groove (332) having an opening (331) is provided on the protection plate (33); the parameter collector (32) is located in the receiving groove (332); and the baffle (34) covers the opening (331).

3. The power battery according to claim 2, characterized in that: The protection plate (33) is provided with a convex portion (333), the convex portion (333) protrudes from the surface of the protection plate (33), and the convex portion (333) is arranged around the circumference of the opening (331), and the baffle (34) is covered on the convex portion (333).

4. The power battery according to claim 1, characterized in that: The parameter collector (32) is welded on the circuit board (31).

5. The power battery according to claim 4, characterized in that: The parameter collection mechanism (30) further comprises a reinforcing plate (35), wherein the reinforcing plate (35) is arranged on a side of the circuit board (31) away from the parameter collector (32).

6. The power battery according to claim 4 or 5, characterized in that: The parameter acquisition mechanism (30) further comprises a thermally conductive pad (36), one side of the thermally conductive pad (36) being in contact with the second side (12), and the other side of the thermally conductive pad (36) being in contact with the circuit board (31).

7. The power battery according to claim 1, characterized in that: An end plate (13) is mounted on the second side surface (12), the protective plate (33) is mounted on the end plate (13), and a surface of the end plate (13) away from the second side surface (12) protrudes from the protective plate (33).

8. The power battery according to claim 7, characterized in that: The end plate (13) is provided with a plurality of reinforcing ribs (131), and the reinforcing ribs (131) protrude from the surface of the protective plate (33).

9. The power battery according to claim 1, characterized in that: The parameter collector (32) is located in the middle of the second side surface (12), and the height of the parameter collector (32) accounts for at least one third of the height of the second side surface (12).

10. An automobile, characterized in that: Comprising a power battery as described in any one of claims 1 to 9.

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